WO2015159830A1 - 感活性光線性又は感放射線性樹脂組成物、該組成物を用いた感活性光線性又は感放射線性膜及びパターン形成方法、並びに電子デバイスの製造方法及び電子デバイス - Google Patents
感活性光線性又は感放射線性樹脂組成物、該組成物を用いた感活性光線性又は感放射線性膜及びパターン形成方法、並びに電子デバイスの製造方法及び電子デバイス Download PDFInfo
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- WO2015159830A1 WO2015159830A1 PCT/JP2015/061278 JP2015061278W WO2015159830A1 WO 2015159830 A1 WO2015159830 A1 WO 2015159830A1 JP 2015061278 W JP2015061278 W JP 2015061278W WO 2015159830 A1 WO2015159830 A1 WO 2015159830A1
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
Definitions
- the present invention relates to an actinic ray-sensitive or radiation-sensitive resin composition, an actinic ray-sensitive or radiation-sensitive film and a pattern forming method using the composition, an electronic device manufacturing method, and an electronic device. More specifically, the present invention is suitable for use in semiconductor manufacturing processes such as ICs, circuit boards such as liquid crystals and thermal heads, and other photofabrication processes, lithographic printing plates, and acid curable compositions.
- the present invention relates to an actinic ray-sensitive or radiation-sensitive resin composition, an actinic ray-sensitive or radiation-sensitive film and a pattern forming method using the composition, an electronic device manufacturing method, and an electronic device.
- the wavelength of the exposure light source has been shortened and the numerical aperture (high NA) of the projection lens has been advanced.
- an exposure machine using an ArF excimer laser having a 193 nm wavelength as a light source has been developed. Yes.
- a so-called immersion method in which a liquid with a high refractive index (hereinafter also referred to as “immersion liquid”) is conventionally filled between the projection lens and the sample, or a shorter wavelength (13 EUV lithography that performs exposure with ultraviolet light of .5 nm) has been proposed.
- Patent Document 1 discloses a chemically amplified resist containing two specific types of photoacid generators.
- a technique for forming a positive pattern by a liquid immersion method using an ArF excimer laser as a light source is disclosed.
- An object of the present invention is to provide an actinic ray-sensitive or radiation-sensitive resin composition excellent in pattern roughness characteristics such as LWR and focus tolerance (DOF), and an actinic ray-sensitive or radiation-sensitive material using the same. It is providing a manufacturing method and an electronic device of an electroluminescent film, a pattern formation method, an electronic device.
- the present invention is as follows.
- An actinic ray-sensitive or radiation-sensitive resin composition containing a resin (A) and a photoacid generator (B) that generates an acid upon irradiation with actinic rays or radiation.
- the photoacid generator (B1) represented by the following general formula (1) and the photoacid generator (B2) different from the photoacid generator (B1) are contained at least in the actinic ray-sensitive or sensation. Radiation resin composition.
- R 1 , R 2 and R 3 are each independently a halogen atom, alkyl group, cycloalkyl group, alkoxy group, alkylcarbonyloxy group, alkyloxycarbonyl group, alkylthio group, cycloalkylcarbonyloxy group, cycloalkyloxycarbonyl Represents a group or a cycloalkylthio group.
- l, m and n each independently represents an integer of 0 to 3, and l + m + n is 1 or more.
- the plurality of R 1 may be the same or different from each other, and at least two R 1 may be bonded to each other to form a ring.
- the plurality of R 2 may be the same as or different from each other, and at least two R 2 may be bonded to each other to form a ring.
- the plurality of R 3 may be the same as or different from each other, and at least two R 3 may be bonded to each other to form a ring.
- Z 1 - represents a non-nucleophilic anion.
- R 1 represents an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group or an alkenyl group.
- R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, and R 2 and R 3 may be linked to each other to form a ring.
- R 1 and R 2 may be connected to each other to form a ring.
- R X and R y each independently represents an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, a 2-oxoalkyl group, a 2-oxocycloalkyl group, an alkoxycarbonylalkyl group, or an alkoxycarbonylcycloalkyl group.
- R X and R y may be connected to each other to form a ring, and this ring structure may contain an oxygen atom, a nitrogen atom, a sulfur atom, a ketone group, an ether bond, an ester bond, or an amide bond.
- Z ⁇ represents a non-nucleophilic anion.
- R 13 represents a group having a hydrogen atom, a fluorine atom, a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, or a cycloalkyl group.
- R 14 s each independently represents a group having a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylcarbonyl group, an alkylsulfonyl group, a cycloalkylsulfonyl group, or a cycloalkyl group.
- R 15 each independently represents an alkyl group, a cycloalkyl group or a naphthyl group. Two R 15 may be bonded to each other to form a ring together with the sulfur atom in the formula, and the atom constituting the ring may further contain a hetero atom in addition to the sulfur atom in the formula.
- l represents an integer of 0-2.
- r represents an integer of 0 to 8.
- Z ⁇ represents a non-nucleophilic anion.
- Xf each independently represents a fluorine atom or an alkyl group substituted with at least one fluorine atom.
- R 16 and R 17 each independently represent a hydrogen atom, a fluorine atom, an alkyl group, or an alkyl group substituted with at least one fluorine atom, and when there are a plurality of R 16 and R 17 , R 16 and R 17 are the same. But it can be different.
- L represents a divalent linking group, and when there are a plurality of L, L may be the same or different.
- W represents an organic group containing a cyclic structure. o represents an integer of 1 to 20.
- p represents an integer of 0 to 10.
- q represents an integer of 0 to 10.
- Z 1 in the general formula (1) - is a non-nucleophilic anion represented by the following general formula (2) [1] to [3] ray- according to any one or Radiation sensitive resin composition.
- Xf each independently represents a fluorine atom or an alkyl group substituted with at least one fluorine atom.
- R 16 and R 17 each independently represent a hydrogen atom, a fluorine atom, an alkyl group, or an alkyl group substituted with at least one fluorine atom, and when there are a plurality of R 16 and R 17 , R 16 and R 17 are the same. But it can be different.
- L represents a divalent linking group, and when there are a plurality of L, L may be the same or different.
- W represents an organic group containing a cyclic structure. o represents an integer of 1 to 20.
- p represents an integer of 0 to 10.
- q represents an integer of 0 to 10.
- a pattern forming method comprising: exposing the actinic ray sensitive or radiation sensitive film; and developing the exposed actinic ray sensitive or radiation sensitive film.
- [12] A method for manufacturing an electronic device, comprising the pattern forming method according to any one of [9] to [11].
- [13] An electronic device manufactured by the method for manufacturing an electronic device according to [12].
- an actinic ray-sensitive or radiation-sensitive resin composition having excellent pattern roughness characteristics such as LWR and excellent focus tolerance (DOF), an actinic ray-sensitive or radiation-sensitive film using the same, and pattern formation It has become possible to provide a method, a method for manufacturing an electronic device, and an electronic device.
- pattern roughness characteristics such as LWR and excellent focus tolerance (DOF)
- DOE focus tolerance
- the notation that does not indicate substitution and non-substitution includes not only those having no substituent but also those having a substituent.
- the “alkyl group” includes not only an alkyl group having no substituent (unsubstituted alkyl group) but also an alkyl group having a substituent (substituted alkyl group).
- active light or “radiation” means, for example, an emission line spectrum of a mercury lamp, far ultraviolet rays represented by excimer laser, extreme ultraviolet rays (EUV light), X-rays, electron beams (EB) and the like.
- light means actinic rays or radiation.
- exposure in this specification means not only exposure with far ultraviolet rays, extreme ultraviolet rays, X-rays, EUV light, etc. represented by mercury lamps and excimer lasers, but also electron beams, ion beams, etc. Drawing with particle beams is also included in the exposure.
- (meth) acrylate represents acrylate and methacrylate
- (meth) acryl represents acryl and methacryl.
- the resin (A) contained in the actinic ray-sensitive or radiation-sensitive resin composition of the present invention (hereinafter also referred to as “the composition of the present invention”), light that generates an acid upon irradiation with actinic rays or radiation.
- the acid generator (B) and optional components that may be contained will be described.
- the actinic ray-sensitive or radiation-sensitive resin composition of the present invention is preferably for ArF exposure, and more preferably for ArF immersion exposure.
- the actinic ray-sensitive or radiation-sensitive resin composition of the present invention may be used for forming a negative pattern using an organic solvent developer, or for forming a positive pattern using an alkali developer. However, when used to form a negative pattern using an organic solvent developer, the LWR and DOF improving effects of the present invention are particularly great.
- the composition according to the present invention is typically a chemically amplified resist composition.
- the composition of the present invention is a general photo acid generator (B) that generates an acid upon irradiation with actinic rays or radiation (hereinafter also referred to as “photo acid generator” or “compound (B)”).
- the photoacid generator (B1) represented by the formula (1) and the photoacid generator (B2) different from the photoacid generator (B1) are contained at least.
- the photoacid generator (B1) is a compound represented by the following general formula (1).
- R 1 , R 2 and R 3 are each independently a halogen atom, alkyl group, cycloalkyl group, alkoxy group, alkylcarbonyloxy group, alkyloxycarbonyl group or alkylthio group, cycloalkylcarbonyloxy group, cycloalkyloxycarbonyl Represents a group or a cycloalkylthio group.
- l, m and n each independently represents an integer of 0 to 3.
- the plurality of R 1 may be the same or different from each other, and at least two R 1 may be bonded to each other to form a ring.
- the plurality of R 2 may be the same as or different from each other, and at least two R 2 may be bonded to each other to form a ring.
- n is 2 or more
- the plurality of R 3 may be the same as or different from each other, and at least two R 3 may be bonded to each other to form a ring.
- l + m + n is 1 or more.
- Z 1 - represents a non-nucleophilic anion.
- halogen atom examples include a fluorine atom, a chlorine atom and a bromine atom.
- the alkyl group as R 1 , R 2 and R 3 may be linear or branched, and may have a substituent. Moreover, the carbon atom contained in the alkyl group may be replaced with a carbonyl carbon. As the alkyl group, for example, an alkyl group having 1 to 20 carbon atoms is preferable, and an alkyl group having 1 to 10 carbon atoms is more preferable.
- alkyl group examples include methyl group, ethyl group, n-propyl group, n-butyl group, n-pentyl group, n-hexyl group, n-octyl group, n-dodecyl group, n-tetradecyl group, n-octadecyl group.
- straight chain alkyl groups such as isopropyl groups, isobutyl groups, t-butyl groups, neopentyl groups, and 2-ethylhexyl groups.
- substituent that the alkyl group may have include a fluorine atom, an alkoxy group, and a hydroxyl group.
- the cycloalkyl group as R 1 , R 2 and R 3 may be monocyclic or polycyclic and may have a substituent.
- a cycloalkyl group having 3 to 20 carbon atoms is preferable, and a cycloalkyl group having 3 to 10 carbon atoms is more preferable.
- Specific examples include a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, a norbornyl group, and an adamantyl group.
- the cycloalkyl group may contain a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom, and may be, for example, a tetrahydropyran ring, a lactone ring, or a cyclic ketone ring. Moreover, the carbon atom contained in the cycloalkyl group may be replaced with a carbonyl carbon.
- Examples of the substituent that the cycloalkyl group may have include an alkyl group, a trifluoromethyl group, an alkoxy group, and a hydroxyl group.
- the alkoxy group as R 1 , R 2 and R 3 may be linear, branched or cyclic, and may have a substituent.
- an alkoxy group having 1 to 20 carbon atoms is preferable, and an alkoxy group having 1 to 10 carbon atoms is more preferable.
- Specific examples include methoxy group, ethoxy group, isopropyloxy group, t-butyloxy group, t-amyloxy group, n-butyloxy group and the like.
- substituent which an alkoxy group may have the same specific example as the substituent which the alkyl group or cycloalkyl group mentioned above may have is mentioned, for example.
- Alkyl groups included alkylcarbonyloxy group as R 1, R 2 and R 3, to has the same meaning as the alkyl group as R 1, R 2 and R 3 described above, similar examples can be cited.
- Alkoxy group contained in the alkyloxycarbonyl group for R 1, R 2 and R 3 has the same meaning as alkoxy group as R 1, R 2 and R 3 described above, similar examples can be cited.
- Alkyl groups included in the alkylthio group as R 1, R 2 and R 3 has the same meaning as the alkyl group as R 1, R 2 and R 3 described above, similar examples can be cited.
- Cycloalkylcarbonyl group as R 1, R 2 and R 3 cycloalkyloxy group, and cycloalkyl group contained in the cycloalkylthio group, a cycloalkyl group as R 1, R 2 and R 3 described above It is synonymous and the same specific example is given.
- At least one of R 1 , R 2 and R 3 is preferably an alkoxy group or an alkylthio group, more preferably at least one is an alkoxy group, A methoxy group is particularly preferred.
- l is preferably an integer of 1 to 3
- m is preferably an integer of 0 to 3
- n is preferably an integer of 0 to 3.
- l + m + n is preferably an integer of 1 to 3.
- non-nucleophilic anion represented by Z 1 — examples include sulfonate anion, carboxylate anion, sulfonylimide anion, bis (alkylsulfonyl) imide anion, tris (alkylsulfonyl) methyl anion, and the like.
- a non-nucleophilic anion is an anion having a remarkably low ability to cause a nucleophilic reaction, and an anion capable of suppressing degradation with time due to an intramolecular nucleophilic reaction. Thereby, the temporal stability of the composition is improved.
- sulfonate anion examples include an aliphatic sulfonate anion, an aromatic sulfonate anion, and a camphor sulfonate anion.
- carboxylate anion examples include an aliphatic carboxylate anion, an aromatic carboxylate anion, and an aralkylcarboxylate anion.
- the aliphatic moiety in the aliphatic sulfonate anion and the aliphatic carboxylate anion may be an alkyl group or a cycloalkyl group, preferably an alkyl group having 1 to 30 carbon atoms and a cycloalkyl group having 3 to 30 carbon atoms.
- Examples of the aromatic group in the aromatic sulfonate anion and aromatic carboxylate anion include preferably an aryl group having 6 to 14 carbon atoms, such as a phenyl group, a tolyl group, and a naphthyl group. it can.
- alkyl group, cycloalkyl group and aryl group in the aliphatic sulfonate anion and aromatic sulfonate anion may have a substituent.
- non-nucleophilic anions examples include fluorinated phosphorus (for example, PF 6 ⁇ ), fluorinated boron (for example, BF 4 ⁇ ), fluorinated antimony and the like (for example, SbF 6 ⁇ ).
- Z 1 - as the non-nucleophilic anion, at least ⁇ -position by an aliphatic sulfonate anion substituted with a fluorine atom, a fluorine atom or a fluorine atom is substituted with a group having a aromatic sulfonate anion of a sulfonic acid, alkyl A bis (alkylsulfonyl) imide anion in which the group is substituted with a fluorine atom and a tris (alkylsulfonyl) methide anion in which the alkyl group is substituted with a fluorine atom are preferred.
- the non-nucleophilic anion is more preferably a perfluoroaliphatic sulfonate anion having 4 to 8 carbon atoms, a benzenesulfonate anion having a fluorine atom, still more preferably a nonafluorobutanesulfonate anion, a perfluorooctanesulfonate anion, Pentafluorobenzenesulfonate anion, 3,5-bis (trifluoromethyl) benzenesulfonate anion.
- the non-nucleophilic anion of Z 1 — is preferably represented by the general formula (2).
- the volume of the generated acid is large and the acid diffusion is suppressed, it is presumed that the exposure latitude is further improved.
- Xf each independently represents a fluorine atom or an alkyl group substituted with at least one fluorine atom.
- R 16 and R 17 each independently represent a hydrogen atom, a fluorine atom, an alkyl group, or an alkyl group substituted with at least one fluorine atom, and when there are a plurality of R 16 and R 17 , R 16 and R 17 are the same. But it can be different.
- L represents a divalent linking group, and when there are a plurality of L, L may be the same or different.
- W represents an organic group containing a cyclic structure.
- O represents an integer of 1 to 20.
- p represents an integer of 0 to 10.
- q represents an integer of 0 to 10.
- Xf is a fluorine atom or an alkyl group substituted with at least one fluorine atom as described above, and the alkyl group in the alkyl group substituted with a fluorine atom is preferably an alkyl group having 1 to 10 carbon atoms, An alkyl group having 1 to 4 carbon atoms is more preferable.
- the alkyl group substituted with a fluorine atom of Xf is preferably a perfluoroalkyl group.
- Xf is preferably a fluorine atom or a perfluoroalkyl group having 1 to 4 carbon atoms. Specifically, fluorine atom, CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 5 F 11 , C 6 F 13 , C 7 F 15 , C 8 F 17 , CH 2 CF 3 , CH 2 CH 2 CF 3, CH 2 C 2 F 5, CH 2 CH 2 C 2 F 5, CH 2 C 3 F 7, CH 2 CH 2 C 3 F 7, CH 2 C 4 F 9, CH 2 CH 2 C 4 F 9 is mentioned, among which fluorine atom and CF 3 are preferable. In particular, it is preferable that both Xf are fluorine atoms.
- R 16 and R 17 represent a hydrogen atom, a fluorine atom, an alkyl group, or an alkyl group substituted with at least one fluorine atom as described above, and the alkyl group preferably has 1 to 4 carbon atoms. More preferred is a perfluoroalkyl group having 1 to 4 carbon atoms. Specific examples of the alkyl group substituted with at least one fluorine atom of R 16 and R 17 include CF 3 , C 2 F 5 , C 3 F 7 , C 4 F 9 , C 5 F 11 , and C 6 F 13.
- L represents a divalent linking group, and represents —COO—, —OCO—, —CO—, —O—, —S—, —SO—, —SO 2 —, —N (Ri) — (wherein Ri represents a hydrogen atom or alkyl), an alkylene group (preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms, particularly preferably a methyl group or an ethyl group, most preferably a methyl group).
- a cycloalkylene group (preferably having 3 to 10 carbon atoms), an alkenylene group (preferably having 2 to 6 carbon atoms), or a divalent linking group in which a plurality of these are combined.
- the alkylene group in —CON (Ri) -alkylene group—, —N (Ri) CO-alkylene group—, —COO-alkylene group—, —OCO-alkylene group— is preferably an alkylene group having 1 to 20 carbon atoms. An alkylene group having 1 to 10 carbon atoms is more preferable. When there are a plurality of L, they may be the same or different.
- alkyl group for Ri include those similar to the specific examples and preferred examples described above as R 1 to R 4 in the general formula (1).
- the organic group having a cyclic structure of W is not particularly limited as long as it has a cyclic structure, and is not limited to alicyclic groups, aryl groups, and heterocyclic groups (not only those having aromaticity but also aromaticity).
- a tetrahydropyran ring, a lactone ring structure, and a sultone ring structure are also included.
- the alicyclic group may be monocyclic or polycyclic, and may be a monocyclic cycloalkyl group such as a cyclopentyl group, a cyclohexyl group, or a cyclooctyl group, a norbornyl group, a norbornene-yl group, or a tricyclodecanyl group (for example, tricyclo [ 5.2.1.0 (2,6)] decanyl group), tetracyclodecanyl group, tetracyclododecanyl group, adamantyl group and the like are preferable, and an adamantyl group is particularly preferable.
- a monocyclic cycloalkyl group such as a cyclopentyl group, a cyclohexyl group, or a cyclooctyl group, a norbornyl group, a norbornene-yl group, or a tricyclodecanyl group (
- nitrogen atom-containing alicyclic groups such as piperidine group, decahydroquinoline group, decahydroisoquinoline group.
- an alicyclic group having a bulky structure of 7 or more carbon atoms such as a norbornyl group, a tricyclodecanyl group, a tetracyclodecanyl group, a tetracyclododecanyl group, an adamantyl group, a decahydroquinoline group, and a decahydroisoquinoline group.
- diffusibility in the film in the PEB (post-exposure heating) step can be suppressed, which is preferable from the viewpoint of improving exposure latitude.
- an adamantyl group and a decahydroisoquinoline group are particularly preferable.
- aryl group examples include a benzene ring, a naphthalene ring, a phenanthrene ring, and an anthracene ring.
- naphthalene having low absorbance is preferred from the viewpoint of light absorbance at 193 nm.
- heterocyclic group examples include a furan ring, a thiophene ring, a benzofuran ring, a benzothiophene ring, a dibenzofuran ring, a dibenzothiophene ring, and a pyridine ring.
- a furan ring, a thiophene ring, and a pyridine ring are preferable.
- Other preferred heterocyclic groups include the structures shown below (wherein X represents a methylene group or an oxygen atom, and R represents a monovalent organic group).
- the cyclic organic group may have a substituent, and examples of the substituent include an alkyl group (which may be linear, branched or cyclic, preferably 1 to 12 carbon atoms), aryl Group (preferably having 6 to 14 carbon atoms), hydroxy group, alkoxy group, ester group, amide group, urethane group, ureido group, thioether group, sulfonamide group, sulfonic acid ester group and the like.
- alkyl group which may be linear, branched or cyclic, preferably 1 to 12 carbon atoms
- aryl Group preferably having 6 to 14 carbon atoms
- hydroxy group alkoxy group
- ester group amide group, urethane group, ureido group, thioether group, sulfonamide group, sulfonic acid ester group and the like.
- the carbon constituting the organic group containing a cyclic structure may be a carbonyl carbon.
- O is preferably 1 to 8, more preferably 1 to 4, and particularly preferably 1.
- p is preferably 0 to 4, more preferably 0 or 1, and still more preferably 1.
- q is preferably 0 to 8, more preferably 0 to 4, and still more preferably 1.
- Z 1 - is a non-nucleophilic anion, and may be a di-imide anion.
- the disulfonyl imido acid anion is preferably a bis (alkylsulfonyl) imide anion.
- the alkyl group in the bis (alkylsulfonyl) imide anion is preferably an alkyl group having 1 to 5 carbon atoms.
- the two alkyl groups in the bis (alkylsulfonyl) imide anion may be linked to each other to form an alkylene group (preferably having 2 to 4 carbon atoms) and form a ring together with the imide group and the two sulfonyl groups.
- the ring structure that may be formed by the bis (alkylsulfonyl) imide anion is preferably a 5- to 7-membered ring, and more preferably a 6-membered ring.
- alkyl groups and alkylene groups formed by connecting two alkyl groups to each other can have a halogen atom, an alkyl group substituted with a halogen atom, an alkoxy group, an alkylthio group, an alkyloxysulfonyl group, an aryl Examples thereof include an oxysulfonyl group and a cycloalkylaryloxysulfonyl group, and a fluorine atom or an alkyl group substituted with a fluorine atom is preferred.
- Z 1 - non-nucleophilic anion from the viewpoint of acid strength is that the pKa of the acid generated is less than -1, preferred for improving sensitivity.
- the non-nucleophilic anion of Z 1 ⁇ has a fluorine content represented by (total mass of all fluorine atoms contained in the anion) / (total mass of all atoms contained in the anion) of 0.25. Or less, more preferably 0.20 or less, and still more preferably 0.15 or less.
- the photoacid generator (B2) is a photoacid generator different from the photoacid generator (B1).
- the photoacid generator (B2) is preferably an ionic compound having a different cation structure from the photoacid generator (B1) represented by the general formula (1).
- the photoacid generator (B2) is an ionic compound having a cation structure different from that of the photoacid generator (B1) represented by the general formula (1) and having the same anion structure. Further preferred.
- the photoacid generator (B2) is, for example, a compound represented by the general formula (ZI-3) or the general formula (ZI-4). First, the compound represented by formula (ZI-3) will be described.
- R 1 represents an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group or an alkenyl group. These groups may have a substituent.
- R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, and R 2 and R 3 may be linked to each other to form a ring. These groups may have a substituent.
- R 1 and R 2 may be connected to each other to form a ring.
- R X and R y each independently represents an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, a 2-oxoalkyl group, a 2-oxocycloalkyl group, an alkoxycarbonylalkyl group, or an alkoxycarbonylcycloalkyl group. These groups may have a substituent.
- R X and R y may be connected to each other to form a ring, and this ring structure may contain an oxygen atom, a nitrogen atom, a sulfur atom, a ketone group, an ether bond, an ester bond, or an amide bond.
- Z ⁇ represents a non-nucleophilic anion.
- the alkyl group as R 1 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and may have an oxygen atom, a sulfur atom, or a nitrogen atom in the alkyl chain. Specifically, methyl group, ethyl group, n-propyl group, n-butyl group, n-pentyl group, n-hexyl group, n-octyl group, n-dodecyl group, n-tetradecyl group, n-octadecyl group, etc.
- alkyl groups such as a linear alkyl group, isopropyl group, isobutyl group, t-butyl group, neopentyl group, and 2-ethylhexyl group.
- the alkyl group of R 1 may have a substituent, and examples of the alkyl group having a substituent include a cyanomethyl group, a 2,2,2-trifluoroethyl group, a methoxycarbonylmethyl group, and an ethoxycarbonylmethyl group. Can be mentioned.
- the cycloalkyl group as R 1 is preferably a cycloalkyl group having 3 to 20 carbon atoms, and may have an oxygen atom or a sulfur atom in the ring. Specific examples include a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, a norbornyl group, an adamantyl group, and the like.
- the cycloalkyl group represented by R 1 may have a substituent, and examples of the substituent include an alkyl group and an alkoxy group.
- the alkoxy group as R 1 is preferably an alkoxy group having 1 to 20 carbon atoms. Specific examples include a methoxy group, an ethoxy group, an isopropyloxy group, a t-butyloxy group, a t-amyloxy group, and an n-butyloxy group.
- the alkoxy group of R 1 may have a substituent, and examples of the substituent include an alkyl group and a cycloalkyl group.
- the cycloalkoxy group as R 1 is preferably a cycloalkoxy group having 3 to 20 carbon atoms, and examples thereof include a cyclohexyloxy group, a norbornyloxy group, and an adamantyloxy group.
- the cycloalkoxy group for R 1 may have a substituent, and examples of the substituent include an alkyl group and a cycloalkyl group.
- the aryl group as R 1 is preferably an aryl group having 6 to 14 carbon atoms, and examples thereof include a phenyl group, a naphthyl group, and a biphenyl group.
- the aryl group of R 1 may have a substituent, and preferred substituents include an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylthio group, and an arylthio group.
- the substituent is an alkyl group, a cycloalkyl group, an alkoxy group or a cycloalkoxy group, the same groups as the alkyl group, cycloalkyl group, alkoxy group and cycloalkoxy group as R 1 described above can be used.
- Examples of the alkenyl group as R 1 include a vinyl group and an allyl group.
- R 2 and R 3 represent a hydrogen atom, an alkyl group, a cycloalkyl group, or an aryl group, and R 2 and R 3 may be connected to each other to form a ring. However, at least one of R 2 and R 3 represents an alkyl group, a cycloalkyl group, or an aryl group. Specific examples and preferred examples of the alkyl group, cycloalkyl group and aryl group for R 2 and R 3 include those similar to the specific examples and preferred examples described above for R 1 .
- the total number of carbon atoms that contribute to the formation of the ring contained in R 2 and R 3 is preferably 4 to 7, and is preferably 4 or 5 It is particularly preferred that
- R 1 and R 2 may be connected to each other to form a ring.
- R 1 is an aryl group (preferably a phenyl group or a naphthyl group which may have a substituent), and R 2 has 1 to 4 carbon atoms.
- An alkylene group preferably a methylene group or an ethylene group
- examples of the preferable substituent include the same substituents that the aryl group as R 1 may have.
- R 1 and R 2 are connected to each other to form a ring, it is also preferable that R 1 is a vinyl group and R 2 is an alkylene group having 1 to 4 carbon atoms.
- the alkyl group represented by R X and R y is preferably an alkyl group having 1 to 15 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group.
- the cycloalkyl group represented by R X and R y is preferably a cycloalkyl group having 3 to 20 carbon atoms, such as a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, a norbornyl group, an adamantyl group and the like.
- the alkenyl group represented by R X and R y is preferably 2 to 30 alkenyl groups such as a vinyl group, an allyl group, and a styryl group.
- aryl group represented by R X and R y for example, an aryl group having 6 to 20 carbon atoms is preferable.
- a phenyl group, a naphthyl group, an azulenyl group, an acenaphthylenyl group, a phenanthrenyl group, a penalenyl group, a phenyl group examples thereof include a nantracenyl group, a fluorenyl group, an anthracenyl group, a pyrenyl group, and a benzopyrenyl group.
- Preferred are a phenyl group and a naphthyl group, and more preferred is a phenyl group.
- alkyl group moiety of the 2-oxoalkyl group and alkoxycarbonylalkyl group represented by R X and R y for example, those previously listed as R X and R y.
- Examples of the cycloalkyl group part of the 2-oxocycloalkyl group and alkoxycarbonylcycloalkyl group represented by R X and R y include those enumerated above as R X and Ry.
- Z - includes, for example, Z 1 in the general formula (1) described above - include those listed as.
- Z ⁇ is more preferably the same as the anion structure (Z 1 ⁇ ) in the acid generator (B1), and the non-nucleophilic anion represented by the above general formula (2) It is preferable that
- R 13 represents a group having a hydrogen atom, a fluorine atom, a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, or a cycloalkyl group. These groups may have a substituent.
- R 14 s each independently represents a group having a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylcarbonyl group, an alkylsulfonyl group, a cycloalkylsulfonyl group, or a cycloalkyl group.
- R 14 s each independently represents a group having a hydroxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylcarbonyl group, an alky
- R 15 each independently represents an alkyl group, a cycloalkyl group or a naphthyl group. Two R 15s may be bonded to each other to form a ring together with the sulfur atom in the formula, and as the atoms constituting the ring, in addition to the sulfur atom in the formula, a hetero atom such as an oxygen atom, a sulfur atom and a nitrogen atom It may contain atoms. These groups may have a substituent.
- l represents an integer of 0-2.
- r represents an integer of 0 to 8.
- Z ⁇ represents a non-nucleophilic anion.
- the general formula (ZI-4) will be described in more detail.
- the alkyl groups of R 13 , R 14 and R 15 are linear or branched, and those having 1 to 10 carbon atoms are preferable.
- Examples of the cycloalkyl group represented by R 13 , R 14 and R 15 include a monocyclic or polycyclic cycloalkyl group.
- the alkoxy group for R 13 and R 14 is preferably linear or branched and has 1 to 10 carbon atoms.
- the alkoxycarbonyl group for R 13 and R 14 is preferably linear or branched and has 2 to 11 carbon atoms.
- Examples of the group having a cycloalkyl group of R 13 and R 14 include a group having a monocyclic or polycyclic cycloalkyl group. These groups may further have a substituent.
- the alkyl group of the alkyl group of R 14, include the same specific examples and the alkyl group as R 13 ⁇ R 15 described above.
- the alkylsulfonyl group and cycloalkylsulfonyl group for R 14 are linear, branched, or cyclic and preferably have 1 to 10 carbon atoms.
- each of the above groups may have include a halogen atom (for example, a fluorine atom), a hydroxyl group, a carboxyl group, a cyano group, a nitro group, an alkoxy group, an alkoxyalkyl group, an alkoxycarbonyl group, and an alkoxycarbonyloxy group.
- This divalent R 15 may have a substituent.
- substituents examples include a hydroxyl group, a carboxyl group, a cyano group, a nitro group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxyalkyl group, an alkoxycarbonyl group. Group, alkoxycarbonyloxy group and the like. There may be a plurality of substituents for the ring structure, or they may be bonded to each other to form a ring.
- R 15 in the general formula (ZI-4) is preferably a methyl group, an ethyl group, a naphthyl group, or a divalent group in which two R 15 are bonded to each other to form a tetrahydrothiophene ring structure together with a sulfur atom.
- a divalent group in which two R 15 are bonded to each other to form a tetrahydrothiophene ring structure together with a sulfur atom is particularly preferable.
- R 13 and R 14 may have is preferably a hydroxyl group, an alkoxy group, an alkoxycarbonyl group, or a halogen atom (particularly a fluorine atom).
- L is preferably 0 or 1, more preferably 1.
- R is preferably from 0 to 2.
- Z - includes, for example, Z 1 in the general formula (1) described above - include those listed as.
- Z ⁇ is more preferably the same as the anion structure (Z 1 ⁇ ) in the acid generator (B1), and the non-nucleophilic anion represented by the above general formula (2) It is preferable that
- cation structure possessed by the compound represented by the general formula (ZI-3) or (ZI-4) described above include the above-mentioned JP-A-2004-233661, JP-A-2003-35948, In addition to cationic structures such as compounds exemplified in US Patent Application Publication No. 2003 / 0224288A1 and US Patent Application Publication No.
- the above-mentioned photoacid generator can be synthesized by a known method, for example, according to the method described in JP-A-2007-161707.
- the photoacid generator (B1) can be used singly or in combination of two or more, and the photoacid generator (B2) can be used singly or in combination of two or more.
- the mixing ratio of the photoacid generator (B1) and the photoacid generator (B2) can be appropriately set.
- the content of the photoacid generator (B) in the composition is preferably 0.1 to 30% by mass, based on the total solid content of the composition, and preferably 1 to 25% by mass. % Is more preferable, 5 to 20% by mass is further preferable, and 10 to 20% by mass is particularly preferable.
- photoacid generator Specific examples of the photoacid generator are shown below, but the present invention is not limited thereto.
- the resin (A) contained in the composition of the present invention is typically a resin that decomposes by the action of an acid and increases in polarity, and has an increased solubility in an alkaline developer by the action of an acid, or
- the resin is preferably a resin whose solubility in a developer containing an organic solvent as a main component is reduced by the action of an acid, and the main chain or side chain of the resin, or both the main chain and the side chain are subjected to the action of an acid. It preferably has a group that decomposes to produce an alkali-soluble group (hereinafter also referred to as “acid-decomposable group”).
- Resin (A) is preferably insoluble or hardly soluble in an alkaline developer.
- the acid-decomposable group preferably has a structure protected by a group capable of decomposing and leaving an alkali-soluble group by the action of an acid.
- Alkali-soluble groups include phenolic hydroxyl groups, carboxyl groups, fluorinated alcohol groups, sulfonic acid groups, sulfonamido groups, sulfonylimide groups, (alkylsulfonyl) (alkylcarbonyl) methylene groups, (alkylsulfonyl) (alkylcarbonyl) imides.
- alkali-soluble group examples include a carboxyl group, a fluorinated alcohol group (preferably a hexafluoroisopropanol group), and a sulfonic acid group.
- a preferred group as the acid-decomposable group is a group obtained by substituting the hydrogen atom of these alkali-soluble groups with a group capable of leaving with an acid.
- Examples of the group leaving with an acid include —C (R 36 ) (R 37 ) (R 38 ), —C (R 36 ) (R 37 ) (OR 39 ), —C (R 01 ) (R 02 ). ) (OR 39 ) and the like.
- R 36 to R 39 each independently represents an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group or an alkenyl group.
- R 36 and R 37 may be bonded to each other to form a ring.
- R 01 and R 02 each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group or an alkenyl group.
- the acid-decomposable group is preferably a cumyl ester group, an enol ester group, an acetal ester group, a tertiary alkyl ester group or the like. More preferably, it is a tertiary alkyl ester group.
- the repeating unit having an acid-decomposable group that can be contained in the resin (A) is preferably a repeating unit represented by the following general formula (AI).
- Xa 1 represents a hydrogen atom or an alkyl group which may have a substituent.
- T represents a single bond or a divalent linking group.
- Rx 1 to Rx 3 each independently represents an alkyl group (straight or branched) or a cycloalkyl group (monocyclic or polycyclic).
- Rx 1 to Rx 3 may combine to form a cycloalkyl group (monocyclic or polycyclic).
- Examples of the optionally substituted alkyl group represented by Xa 1 include a methyl group or a group represented by —CH 2 —R 11 .
- R 11 represents a halogen atom (such as a fluorine atom), a hydroxyl group or a monovalent organic group, and examples thereof include an alkyl group having 5 or less carbon atoms and an acyl group having 5 or less carbon atoms, preferably 3 or less carbon atoms. And more preferably a methyl group.
- Xa 1 is preferably a hydrogen atom, a methyl group, a trifluoromethyl group, a hydroxymethyl group, or the like.
- Examples of the divalent linking group of T include an alkylene group, —COO—Rt— group, —O—Rt— group and the like.
- Rt represents an alkylene group or a cycloalkylene group.
- T is preferably a single bond or a —COO—Rt— group.
- Rt is preferably an alkylene group having 1 to 5 carbon atoms, more preferably a —CH 2 — group, — (CH 2 ) 2 — group, or — (CH 2 ) 3 — group.
- the alkyl group of Rx 1 to Rx 3 is preferably an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, or a t-butyl group.
- Examples of the cycloalkyl group of Rx 1 to Rx 3 include monocyclic cycloalkyl groups such as cyclopentyl group and cyclohexyl group, polycyclic cycloalkyl groups such as norbornyl group, tetracyclodecanyl group, tetracyclododecanyl group and adamantyl group. Groups are preferred.
- the two are cycloalkyl group formed by bonding of Rx 1 ⁇ Rx 3, cyclopentyl group, a monocyclic cycloalkyl group such as cyclohexyl group, norbornyl group, tetra tricyclodecanyl group, tetracyclododecanyl group, adamantyl
- a polycyclic cycloalkyl group such as a group is preferred.
- a monocyclic cycloalkyl group having 5 to 6 carbon atoms is particularly preferred.
- the cycloalkyl group formed by combining two of Rx 1 to Rx 3 is, for example, a group in which one of the methylene groups constituting the ring has a heteroatom such as an oxygen atom or a heteroatom such as a carbonyl group. It may be replaced.
- the repeating unit represented by the general formula (AI) preferably has, for example, an embodiment in which Rx 1 is a methyl group or an ethyl group, and Rx 2 and Rx 3 are bonded to form the above-described cycloalkyl group.
- Each of the above groups may have a substituent.
- substituents include an alkyl group (1 to 4 carbon atoms), a halogen atom, a hydroxyl group, an alkoxy group (1 to 4 carbon atoms), a carboxyl group, an alkoxy group.
- substituents include carbonyl groups (having 2 to 6 carbon atoms), and those having 8 or less carbon atoms are preferred.
- the total content of the repeating units having an acid-decomposable group is preferably 20 to 90 mol%, more preferably 25 to 85 mol%, based on all repeating units in the resin (A), 30 More preferably, it is ⁇ 80 mol%.
- repeating unit having a preferred acid-decomposable group examples include but not limited thereto.
- Rx and Xa 1 represent a hydrogen atom, CH 3 , CF 3 , or CH 2 OH.
- Rxa and Rxb each represents an alkyl group having 1 to 4 carbon atoms.
- Z represents a substituent containing a polar group, and when there are a plurality of them, each is independent.
- p represents 0 or a positive integer.
- the substituent containing a polar group represented by Z include a linear or branched alkyl group having a hydroxyl group, a cyano group, an amino group, an alkylamide group, or a sulfonamide group, and a cycloalkyl group. Is an alkyl group having a hydroxyl group.
- the branched alkyl group an isopropyl group is particularly preferable.
- the resin (A) preferably contains, for example, a repeating unit represented by the general formula (3) as the repeating unit represented by the general formula (AI).
- R 31 represents a hydrogen atom or an alkyl group.
- R 32 represents an alkyl group or a cycloalkyl group, and specific examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. And a cyclohexyl group.
- R 33 represents an atomic group necessary for forming a monocyclic alicyclic hydrocarbon structure together with the carbon atom to which R 32 is bonded.
- a part of carbon atoms constituting the ring may be substituted with a hetero atom or a group having a hetero atom.
- the alkyl group for R 31 may have a substituent, and examples of the substituent include a fluorine atom and a hydroxyl group.
- R 31 preferably represents a hydrogen atom, a methyl group, a trifluoromethyl group or a hydroxymethyl group.
- R 32 is preferably a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a tert-butyl group or a cyclohexyl group, and more preferably a methyl group, an ethyl group, an isopropyl group or a tert-butyl group.
- the monocyclic alicyclic hydrocarbon structure formed by R 33 together with the carbon atom is preferably a 3- to 8-membered ring, more preferably a 5- or 6-membered ring.
- examples of the hetero atom that can form the ring include an oxygen atom and a sulfur atom.
- examples of the group having a hetero atom include a carbonyl group and the like. Can be mentioned. However, the group having a hetero atom is preferably not an ester group (ester bond).
- the monocyclic alicyclic hydrocarbon structure formed by R 33 together with the carbon atom is preferably formed only from the carbon atom and the hydrogen atom.
- the repeating unit represented by the general formula (3) is preferably a repeating unit represented by the following general formula (3 ′).
- R 31 and R 32 have the same meanings as in general formula (3).
- R 31 and R 32 have the same meanings as in general formula (3).
- the specific example of the repeating unit which has a structure represented by General formula (3) is given below, it is not limited to these.
- the content of the repeating unit having the structure represented by the general formula (3) is preferably 20 to 80 mol%, and preferably 25 to 75 mol% with respect to all the repeating units in the resin (A). Is more preferable, and it is still more preferable that it is 30 to 70 mol%.
- Resin (A) has as a repeating unit represented by general formula (AI) at least any one of the repeating unit represented by general formula (I) and the repeating unit represented by general formula (II), for example. More preferably, it is a resin.
- R 1 and R 3 each independently represent a hydrogen atom, an optionally substituted methyl group or a group represented by —CH 2 —R 11 .
- R 11 represents a monovalent organic group.
- R 2 , R 4 , R 5 and R 6 each independently represents an alkyl group or a cycloalkyl group.
- R represents an atomic group necessary for forming an alicyclic structure together with the carbon atom to which R 2 is bonded.
- R 1 and R 3 preferably represent a hydrogen atom, a methyl group, a trifluoromethyl group or a hydroxymethyl group.
- Specific examples and preferred examples of the monovalent organic group in R 11 are the same as those described for R 11 in formula (AI).
- the alkyl group in R 2 may be linear or branched, and may have a substituent.
- the cycloalkyl group in R 2 may be monocyclic or polycyclic and may have a substituent.
- R 2 is preferably an alkyl group, more preferably an alkyl group having 1 to 10 carbon atoms, still more preferably 1 to 5 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, Examples thereof include a t-butyl group.
- the alkyl group for R 2 is preferably a methyl group, an ethyl group, an i-propyl group, or a t-butyl group.
- R represents an atomic group necessary for forming an alicyclic structure together with a carbon atom.
- the alicyclic structure formed by R together with the carbon atom is preferably a monocyclic alicyclic structure, and the carbon number thereof is preferably 3 to 7, more preferably 5 or 6.
- R 3 is preferably a hydrogen atom or a methyl group, and more preferably a methyl group.
- the alkyl group in R 4 , R 5 , and R 6 may be linear or branched and may have a substituent.
- the alkyl group those having 1 to 4 carbon atoms such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group and t-butyl group are preferable.
- the cycloalkyl group in R 4 , R 5 and R 6 may be monocyclic or polycyclic and may have a substituent.
- the cycloalkyl group is preferably a monocyclic cycloalkyl group such as a cyclopentyl group or a cyclohexyl group, or a polycyclic cycloalkyl group such as a norbornyl group, a tetracyclodecanyl group, a tetracyclododecanyl group or an adamantyl group.
- Examples of the substituent that each of the above groups may have include the same groups as those described above as the substituent that each of the groups in the general formula (AI) may have.
- R 4 , R 5 and R 6 are preferably alkyl groups, and the total number of carbon atoms of R 4 , R 5 and R 6 is preferably 5 or more, and 6 or more. More preferably, it is more preferably 7 or more.
- the resin (A) is a resin containing a repeating unit represented by the general formula (I) and a repeating unit represented by the general formula (II) as the repeating unit represented by the general formula (AI). More preferred.
- the resin containing at least two types of repeating units represented by the general formula (I) as the repeating unit represented by the general formula (AI) is more preferable.
- the alicyclic structure formed by R together with the carbon atom is a monocyclic alicyclic structure, and the alicyclic structure formed by R together with the carbon atom. It is preferable that both the repeating unit which is a polycyclic alicyclic structure is included.
- the monocyclic alicyclic structure preferably has 5 to 8 carbon atoms, more preferably 5 or 6 carbon atoms, and particularly preferably 5 carbon atoms.
- a norbornyl group, a tetracyclodecanyl group, a tetracyclododecanyl group, and an adamantyl group are preferable.
- each R independently represents a hydrogen atom or a methyl group.
- the resin (A) preferably contains a repeating unit having a cyclic carbonate structure.
- This cyclic carbonate structure is a structure having a ring including a bond represented by —O—C ( ⁇ O) —O— as an atomic group constituting the ring.
- the ring containing a bond represented by —O—C ( ⁇ O) —O— as the atomic group constituting the ring is preferably a 5- to 7-membered ring, and most preferably a 5-membered ring.
- Such a ring may be condensed with another ring to form a condensed ring.
- the resin (A) preferably contains a repeating unit having a lactone structure or a sultone (cyclic sulfonate ester) structure.
- Any lactone group or sultone group can be used as long as it has a lactone structure or a sultone structure, but it is preferably a 5- to 7-membered lactone structure or a sultone structure, and a 5- to 7-membered lactone A structure in which another ring structure is condensed to form a bicyclo structure or a spiro structure in the structure or sultone structure is preferable. It is more preferable to have a repeating unit having a lactone structure or a sultone structure represented by any of the following general formulas (LC1-1) to (LC1-17), (SL1-1) and (SL1-2). A lactone structure or a sultone structure may be directly bonded to the main chain.
- Preferred lactone structures or sultone structures are (LC1-1), (LC1-4), (LC1-5), (LC1-8), and more preferably (LC1-4).
- the lactone structure portion or the sultone structure portion may or may not have a substituent (Rb 2 ).
- Preferred substituents (Rb 2 ) include alkyl groups having 1 to 8 carbon atoms, cycloalkyl groups having 4 to 7 carbon atoms, alkoxy groups having 1 to 8 carbon atoms, alkoxycarbonyl groups having 2 to 8 carbon atoms, and carboxyl groups. , Halogen atom, hydroxyl group, cyano group, acid-decomposable group and the like. More preferred are an alkyl group having 1 to 4 carbon atoms, a cyano group, and an acid-decomposable group.
- n 2 represents an integer of 0 to 4. When n 2 is 2 or more, a plurality of substituents (Rb 2 ) may be the same or different, and a plurality of substituents (Rb 2 ) may be bonded to form a ring. .
- the resin (A) preferably contains a repeating unit having a lactone structure or a sultone structure represented by the following general formula (III).
- A represents an ester bond (a group represented by —COO—) or an amide bond (a group represented by —CONH—).
- each R 0 independently represents an alkylene group, a cycloalkylene group or a combination thereof.
- each is independently a single bond, ether bond, ester bond, amide bond, urethane bond
- R represents a hydrogen atom, an alkyl group, a cycloalkyl group, or an aryl group each independently.
- R 8 represents a monovalent organic group having a lactone structure or a sultone structure.
- n is the number of repetitions of the structure represented by —R 0 —Z—, and represents an integer of 0-2.
- R 7 represents a hydrogen atom, a halogen atom or an alkyl group.
- the alkylene group and cycloalkylene group represented by R 0 may have a substituent.
- Z is preferably an ether bond or an ester bond, and particularly preferably an ester bond.
- the alkyl group for R 7 is preferably an alkyl group having 1 to 4 carbon atoms, more preferably a methyl group or an ethyl group, and particularly preferably a methyl group.
- the alkylene group of R 0 , the cycloalkylene group, and the alkyl group in R 7 may each be substituted.
- the substituent include a halogen atom such as a fluorine atom, a chlorine atom, and a bromine atom, a mercapto group, and a hydroxy group.
- R 7 is preferably a hydrogen atom, a methyl group, a trifluoromethyl group, or a hydroxymethyl group.
- the preferred chain alkylene group for R 0 is preferably a chain alkylene having 1 to 10 carbon atoms, more preferably 1 to 5 carbon atoms, and examples thereof include a methylene group, an ethylene group, and a propylene group.
- a preferred cycloalkylene group is a cycloalkylene group having 3 to 20 carbon atoms, and examples thereof include a cyclohexylene group, a cyclopentylene group, a norbornylene group, and an adamantylene group.
- a chain alkylene group is more preferable, and a methylene group is particularly preferable.
- the monovalent organic group having a lactone structure or a sultone structure represented by R 8 is not limited as long as it has a lactone structure or a sultone structure, and is represented by the general formula (LC1-1) described above as a specific example. Examples include a lactone structure or a sultone structure represented by (LC1-17), (SL1-1), and (SL1-2), and a structure represented by (LC1-4) is particularly preferable. Further, n 2 in (LC1-1) to (LC1-17), (SL1-1) and (SL1-2) is more preferably 2 or less.
- R 8 is preferably a monovalent organic group having an unsubstituted lactone structure or sultone structure, or a monovalent organic group having a lactone structure or sultone structure having a methyl group, a cyano group or an alkoxycarbonyl group as a substituent.
- a monovalent organic group having a lactone structure (cyanolactone) or a sultone structure (cyanosultone) having a cyano group as a substituent is more preferable.
- n is preferably 0 or 1.
- the repeating unit having a lactone structure or a sultone structure is more preferably a repeating unit represented by the following general formula (III-1) or (III-1 ′).
- R 7 , A, R 0 , Z, and n are as defined in the general formula (III).
- R 7 ′, A ′, R 0 ′, Z ′ and n ′ are respectively synonymous with R 7 , A, R 0 , Z and n in the general formula (III).
- R 9 is each independently in the presence of two or more groups, an alkyl group, a cycloalkyl group, an alkoxycarbonyl group, a cyano group, a hydroxyl group or an alkoxy group, and when a plurality of bonded two R 9, ring May be formed.
- R 9 ′ each independently represents an alkyl group, a cycloalkyl group, an alkoxycarbonyl group, a cyano group, a hydroxyl group or an alkoxy group, and when there are a plurality of R 9 ′, two R 9 ′ are bonded. , May form a ring.
- M and m ′ are the number of substituents and each independently represents an integer of 0 to 5. m and m ′ are preferably each independently 0 or 1.
- the alkyl group for R 9 and R 9 ′ is preferably an alkyl group having 1 to 4 carbon atoms, more preferably a methyl group or an ethyl group, and most preferably a methyl group.
- Examples of the cycloalkyl group include cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl groups.
- Examples of the alkoxycarbonyl group include methoxycarbonyl group, ethoxycarbonyl group, n-butoxycarbonyl group, t-butoxycarbonyl group and the like.
- Examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, and a butoxy group.
- R 9 and R 9 ′ are more preferably a methyl group, a cyano group or an alkoxycarbonyl group, and even more preferably a cyano group.
- Examples of the alkylene group of X and X ′ include a methylene group and an ethylene group.
- X and X ′ are preferably an oxygen atom or a methylene group, and more preferably a methylene group.
- R 9 and R 9 ′ are 1 or more, at least one of R 9 and R 9 ′ is preferably substituted at the ⁇ -position or ⁇ -position of the carbonyl group of the lactone, particularly preferably at the ⁇ -position.
- the content of the repeating unit represented by the general formula (III) is preferably 15 to 60 mol%, more preferably 20 to 60 mol in total with respect to all repeating units in the resin (A) when a plurality of types are contained. %, More preferably 30 to 50 mol%.
- Resin (A) may also contain a repeating unit having the above-mentioned lactone structure or sultone structure in addition to the unit represented by the general formula (III).
- the repeating unit having a lactone group or a sultone group usually has an optical isomer, but any optical isomer may be used.
- One optical isomer may be used alone, or a plurality of optical isomers may be mixed and used.
- the optical purity (ee) thereof is preferably 90% or more, more preferably 95% or more.
- the content of the repeating unit having a lactone structure or a sultone structure other than the repeating unit represented by the general formula (III) is 15 to 60 mol% in total with respect to all the repeating units in the resin when a plurality of types are contained. More preferably, it is 20 to 50 mol%, still more preferably 30 to 50 mol%.
- two or more lactone or sultone repeating units selected from general formula (III) can be used in combination.
- the resin (A) preferably has a repeating unit having a hydroxyl group or a cyano group other than the general formulas (AI) and (III). This improves the substrate adhesion and developer compatibility.
- the repeating unit having a hydroxyl group or a cyano group is preferably a repeating unit having an alicyclic hydrocarbon structure substituted with a hydroxyl group or a cyano group, and preferably has no acid-decomposable group.
- the alicyclic hydrocarbon structure in the alicyclic hydrocarbon structure substituted with a hydroxyl group or a cyano group is preferably an adamantyl group, a diamantyl group, or a norbornane group.
- As the alicyclic hydrocarbon structure substituted with a preferred hydroxyl group or cyano group partial structures represented by the following general formulas (VIIa) to (VIId) are preferred.
- R 2 c to R 4 c each independently represents a hydrogen atom, a hydroxyl group or a cyano group. However, at least one of R 2 c to R 4 c represents a hydroxyl group or a cyano group. Preferably, one or two of R 2 c to R 4 c are a hydroxyl group and the remaining is a hydrogen atom. In the general formula (VIIa), more preferably, two of R 2 c to R 4 c are a hydroxyl group and the rest are hydrogen atoms.
- Examples of the repeating unit having a partial structure represented by the general formulas (VIIa) to (VIId) include the repeating units represented by the following general formulas (AIIa) to (AIId).
- R 1 c represents a hydrogen atom, a methyl group, a trifluoromethyl group, or a hydroxymethyl group.
- R 2 c ⁇ R 4 c is in the general formula (VIIa) ⁇ (VIIc), the same meanings as R 2 c ⁇ R 4 c.
- the content of the repeating unit having a hydroxyl group or a cyano group is preferably from 5 to 40 mol%, more preferably from 5 to 30 mol%, still more preferably from 10 to 25 mol%, based on all repeating units in the resin (A).
- repeating unit having a hydroxyl group or a cyano group are given below, but the present invention is not limited thereto.
- the resin (A) used in the composition of the present invention may have a repeating unit having an alkali-soluble group.
- the alkali-soluble group include a carboxyl group, a sulfonamide group, a sulfonylimide group, a bissulfonylimide group, and an aliphatic alcohol (for example, hexafluoroisopropanol group) substituted with an electron-withdrawing group at the ⁇ -position. It is more preferable to have a repeating unit. By containing the repeating unit having an alkali-soluble group, the resolution in contact hole applications is increased.
- the repeating unit having an alkali-soluble group includes a repeating unit in which an alkali-soluble group is directly bonded to the main chain of the resin, such as a repeating unit of acrylic acid or methacrylic acid, or an alkali in the main chain of the resin through a linking group.
- a repeating unit to which a soluble group is bonded, or a polymerization initiator or chain transfer agent having an alkali-soluble group is used at the time of polymerization and introduced at the end of the polymer chain. Both are preferable, and the linking group is monocyclic or polycyclic. It may have a cyclic hydrocarbon structure. Particularly preferred are repeating units of acrylic acid or methacrylic acid.
- the content of the repeating unit having an alkali-soluble group is preferably from 0 to 20 mol%, more preferably from 3 to 15 mol%, still more preferably from 5 to 10 mol%, based on all repeating units in the resin (A).
- repeating unit having an alkali-soluble group are shown below, but the present invention is not limited thereto.
- Rx represents H, CH 3 , CH 2 OH, or CF 3 .
- the resin (A) can further have a repeating unit that has an alicyclic hydrocarbon structure that does not have a polar group (for example, an alkali-soluble group, a hydroxyl group, a cyano group, etc.) and does not exhibit acid decomposability.
- a repeating unit include a repeating unit represented by the general formula (IV).
- R 5 represents a hydrocarbon group having at least one cyclic structure and having no polar group.
- Ra represents a hydrogen atom, an alkyl group or -CH 2 -O-Ra 2 group.
- Ra 2 represents a hydrogen atom, an alkyl group, or an acyl group.
- Ra 2 is preferably a hydrogen atom, a methyl group, a hydroxymethyl group, or a trifluoromethyl group, and particularly preferably a hydrogen atom or a methyl group.
- the cyclic structure possessed by R 5 includes a monocyclic hydrocarbon group and a polycyclic hydrocarbon group.
- the monocyclic hydrocarbon group include cycloalkenyl having 3 to 12 carbon atoms such as cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group and the like, and cycloalkyl groups having 3 to 12 carbon atoms and cyclohexenyl group.
- a preferred monocyclic hydrocarbon group is a monocyclic hydrocarbon group having 3 to 7 carbon atoms, and more preferred examples include a cyclopentyl group and a cyclohexyl group.
- the polycyclic hydrocarbon group includes a ring assembly hydrocarbon group and a bridged cyclic hydrocarbon group, and examples of the ring assembly hydrocarbon group include a bicyclohexyl group and a perhydronaphthalenyl group.
- the bridged cyclic hydrocarbon ring for example, bicyclic such as pinane, bornane, norpinane, norbornane, bicyclooctane ring (bicyclo [2.2.2] octane ring, bicyclo [3.2.1] octane ring, etc.) Hydrocarbon ring, homobredan, adamantane, tricyclo [5.2.1.0 2,6 ] decane, tricyclic hydrocarbon ring such as tricyclo [4.3.1.1 2,5 ] undecane ring, tetracyclo [4 .4.0.1 2,5 .
- the bridged cyclic hydrocarbon ring includes a condensed cyclic hydrocarbon ring such as perhydronaphthalene (decalin), perhydroanthracene, perhydrophenanthrene, perhydroacenaphthene, perhydrofluorene, perhydroindene, perhydroindene.
- a condensed ring in which a plurality of 5- to 8-membered cycloalkane rings such as a phenalene ring are condensed is also included.
- Preferred examples of the bridged cyclic hydrocarbon ring include a norbornyl group, an adamantyl group, a bicyclooctanyl group, a tricyclo [5,2,1,0 2,6 ] decanyl group, and the like. More preferable examples of the bridged cyclic hydrocarbon ring include a norbornyl group and an adamantyl group.
- These alicyclic hydrocarbon groups may have a substituent.
- Preferred examples of the substituent include a halogen atom, an alkyl group, a hydroxyl group substituted with a hydrogen atom, and an amino group substituted with a hydrogen atom. It is done.
- Preferred halogen atoms include bromine, chlorine and fluorine atoms, and preferred alkyl groups include methyl, ethyl, butyl and t-butyl groups.
- the alkyl group described above may further have a substituent, and examples of the substituent that may further include a halogen atom, an alkyl group, a hydroxyl group substituted with a hydrogen atom, and an amino group substituted with a hydrogen atom. The group can be mentioned.
- Examples of the group in which the hydrogen atom is substituted include an alkyl group, a cycloalkyl group, an aralkyl group, a substituted methyl group, a substituted ethyl group, an alkoxycarbonyl group, and an aralkyloxycarbonyl group.
- Preferred alkyl groups include alkyl groups having 1 to 4 carbon atoms
- preferred substituted methyl groups include methoxymethyl, methoxythiomethyl, benzyloxymethyl, t-butoxymethyl, 2-methoxyethoxymethyl groups, and preferred substituted ethyl groups.
- acyl groups include aliphatic acyl groups having 1 to 6 carbon atoms such as formyl, acetyl, propionyl, butyryl, isobutyryl, valeryl and pivaloyl groups, alkoxycarbonyl Examples of the group include an alkoxycarbonyl group having 1 to 4 carbon atoms.
- the resin (A) has an alicyclic hydrocarbon structure having no polar group, and may or may not contain a repeating unit that does not exhibit acid decomposability.
- the content of is preferably 1 to 40 mol%, more preferably 2 to 20 mol%, based on all repeating units in the resin (A).
- Ra represents H, CH 3 , CH 2 OH, or CF 3 .
- the resin (A) may contain a repeating unit represented by the following general formula (nI) or general formula (nII).
- R 13 ′ to R 16 ′ each independently have a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, a carboxyl group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylcarbonyl group, or a lactone structure. Represents a group or a group having an acid-decomposable group.
- X 1 and X 2 each independently represent a methylene group, an ethylene group, an oxygen atom or a sulfur atom.
- n represents an integer of 0 to 2.
- Examples of the acid-decomposable group in the group having an acid-decomposable group as R 13 ′ to R 16 ′ include cumyl ester group, enol ester group, acetal ester group, tertiary alkyl ester group, etc. This is preferably a tertiary alkyl ester group represented by —C ( ⁇ O) —O—R 0 .
- R 0 is a tertiary alkyl group such as t-butyl group or t-amyl group, isobornyl group, 1-ethoxyethyl group, 1-butoxyethyl group, 1-isobutoxyethyl group, 1-cyclohexyloxy 1-alkoxyethyl group such as ethyl group, alkoxymethyl group such as 1-methoxymethyl group and 1-ethoxymethyl group, 3-oxoalkyl group, tetrahydropyranyl group, tetrahydrofuranyl group, trialkylsilyl ester group, 3- Examples thereof include an oxocyclohexyl ester group, a 2-methyl-2-adamantyl group, a mevalonic lactone residue, and the like.
- At least one of R 13 ′ to R 16 ′ is preferably a group having an acid-decomposable group.
- Examples of the halogen atom in R 13 ′ to R 16 ′ include a chlorine atom, a bromine atom, a fluorine atom, and an iodine atom.
- the alkyl group represented by R 13 ′ to R 16 ′ is more preferably a group represented by the following general formula (F1).
- R 50 to R 55 each independently represents a hydrogen atom, a fluorine atom or an alkyl group. However, at least one of R 50 to R 55 represents a fluorine atom or an alkyl group in which at least one hydrogen atom is substituted with a fluorine atom.
- Rx is a hydrogen atom or an organic group (preferably an acid-decomposable protecting group, an alkyl group, a cycloalkyl group, an acyl group, an alkoxycarbonyl group), and preferably a hydrogen atom.
- R 50 to R 55 are preferably all fluorine atoms.
- repeating unit represented by the general formula (nI) or the general formula (nII) include the following specific examples, but the present invention is not limited to these compounds. Of these, repeating units represented by (II-f-16) to (II-f-19) are preferred.
- the resin (A) used in the composition of the present invention has a resolving power that is a general necessary characteristic of a resist, in addition to the above repeating structural unit, dry etching resistance, standard developer suitability, substrate adhesion, resist profile, and the like. It can have various repeating structural units for the purpose of adjusting heat resistance, sensitivity and the like. Examples of such repeating structural units include, but are not limited to, repeating structural units corresponding to the following monomers.
- a monomer for example, a compound having one addition polymerizable unsaturated bond selected from acrylic acid esters, methacrylic acid esters, acrylamides, methacrylamides, allyl compounds, vinyl ethers, vinyl esters, etc. Etc.
- any addition-polymerizable unsaturated compound that can be copolymerized with monomers corresponding to the above various repeating structural units may be copolymerized.
- the molar ratio of each repeating structural unit is the resist dry etching resistance, standard developer suitability, substrate adhesion, resist profile, and general required performance of the resist. It is appropriately set to adjust the resolving power, heat resistance, sensitivity and the like.
- the resin (A) used in the composition of the present invention has substantially no aromatic group from the viewpoint of transparency to ArF light.
- the repeating unit having an aromatic group is preferably 5% by mole or less, more preferably 3% by mole or less, and more ideally, during the entire repetition of the resin (A). More preferably, it is 0 mol%, that is, it does not have a repeating unit having an aromatic group.
- the resin (A) preferably has a monocyclic or polycyclic alicyclic hydrocarbon structure.
- the resin (A) When the composition of the present invention is irradiated with KrF excimer laser light, electron beam, X-ray, or high-energy light (for example, EUV) having a wavelength of 50 nm or less, the resin (A) has a hydroxystyrene repeating unit. It is preferable. More preferably, the resin (A) is a copolymer of hydroxystyrene and hydroxystyrene protected with a group capable of leaving by the action of an acid, or hydroxystyrene and a (meth) acrylic acid tertiary alkyl ester. It is a copolymer.
- Such a resin include a resin having a repeating unit represented by the following general formula (A).
- R 01 , R 02 and R 03 each independently represent, for example, a hydrogen atom, an alkyl group, a cycloalkyl group, a halogen atom, a cyano group or an alkoxycarbonyl group.
- Ar 1 represents an aromatic ring group, for example.
- R 03 and Ar 1 are alkylene groups, and they may be bonded to each other to form a 5-membered or 6-membered ring together with the —C—C— chain.
- N pieces of Y each independently represent a hydrogen atom or a group capable of leaving by the action of an acid. However, at least one of Y represents a group capable of leaving by the action of an acid.
- N represents an integer of 1 to 4, preferably 1 to 2, and more preferably 1.
- the alkyl group as R 01 to R 03 is, for example, an alkyl group having 20 or less carbon atoms, and preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, or a hexyl group. 2-ethylhexyl group, octyl group or dodecyl group. More preferably, these alkyl groups are alkyl groups having 8 or less carbon atoms. In addition, these alkyl groups may have a substituent.
- alkyl group contained in the alkoxycarbonyl group the same alkyl groups as those described above for R 01 to R 03 are preferable.
- the cycloalkyl group may be a monocyclic cycloalkyl group or a polycyclic cycloalkyl group.
- monocyclic cycloalkyl groups having 3 to 8 carbon atoms such as cyclopropyl group, cyclopentyl group, and cyclohexyl group are exemplified.
- these cycloalkyl groups may have a substituent.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, and a fluorine atom is more preferable.
- R 03 represents an alkylene group
- the alkylene group is preferably an alkylene group having 1 to 8 carbon atoms such as a methylene group, an ethylene group, a propylene group, a butylene group, a hexylene group, or an octylene group.
- the aromatic ring group as Ar 1 preferably has 6 to 14 carbon atoms, and examples thereof include a benzene ring, a toluene ring, and a naphthalene ring. In addition, these aromatic ring groups may have a substituent.
- Examples of the group Y leaving by the action of an acid include —C (R 36 ) (R 37 ) (R 38 ), —C ( ⁇ O) —O—C (R 36 ) (R 37 ) (R 38 ). ), —C (R 01 ) (R 02 ) (OR 39 ), —C (R 01 ) (R 02 ) —C ( ⁇ O) —O—C (R 36 ) (R 37 ) (R 38 ) or And a group represented by —CH (R 36 ) (Ar).
- R 36 to R 39 each independently represents an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group or an alkenyl group.
- R 36 and R 37 may be bonded to each other to form a ring structure.
- R 01 and R 02 each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group or an alkenyl group.
- Ar represents an aryl group.
- the alkyl group as R 36 to R 39 , R 01 , or R 02 is preferably an alkyl group having 1 to 8 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an n-butyl group, sec- A butyl group, a hexyl group, and an octyl group are mentioned.
- the cycloalkyl group as R 36 to R 39 , R 01 , or R 02 may be a monocyclic cycloalkyl group or a polycyclic cycloalkyl group.
- the monocyclic cycloalkyl group is preferably a cycloalkyl group having 3 to 8 carbon atoms, and examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclooctyl group.
- the polycyclic cycloalkyl group is preferably a cycloalkyl group having 6 to 20 carbon atoms, such as an adamantyl group, norbornyl group, isobornyl group, camphanyl group, dicyclopentyl group, ⁇ -pinanyl group, tricyclodecanyl group, A tetracyclododecyl group and an androstanyl group are mentioned.
- a part of carbon atoms in the cycloalkyl group may be substituted with a hetero atom such as an oxygen atom.
- the aryl group as R 36 to R 39 , R 01 , R 02 , or Ar is preferably an aryl group having 6 to 10 carbon atoms, and examples thereof include a phenyl group, a naphthyl group, and an anthryl group.
- the aralkyl group as R 36 to R 39 , R 01 , or R 02 is preferably an aralkyl group having 7 to 12 carbon atoms, and for example, a benzyl group, a phenethyl group, and a naphthylmethyl group are preferable.
- the alkenyl group as R 36 to R 39 , R 01 , or R 02 is preferably an alkenyl group having 2 to 8 carbon atoms, and examples thereof include a vinyl group, an allyl group, a butenyl group, and a cyclohexenyl group. .
- the ring that R 36 and R 37 may be bonded to each other may be monocyclic or polycyclic.
- the monocyclic type is preferably a cycloalkane structure having 3 to 8 carbon atoms, and examples thereof include a cyclopropane structure, a cyclobutane structure, a cyclopentane structure, a cyclohexane structure, a cycloheptane structure, and a cyclooctane structure.
- the polycyclic type is preferably a cycloalkane structure having 6 to 20 carbon atoms, and examples thereof include an adamantane structure, a norbornane structure, a dicyclopentane structure, a tricyclodecane structure, and a tetracyclododecane structure. Note that some of the carbon atoms in the ring structure may be substituted with a heteroatom such as an oxygen atom.
- Each of the above groups may have a substituent.
- this substituent include alkyl groups, cycloalkyl groups, aryl groups, amino groups, amide groups, ureido groups, urethane groups, hydroxyl groups, carboxyl groups, halogen atoms, alkoxy groups, thioether groups, acyl groups, and acyloxy groups. , Alkoxycarbonyl group, cyano group and nitro group. These substituents preferably have 8 or less carbon atoms.
- L 1 and L 2 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group.
- M represents a single bond or a divalent linking group.
- Q represents an alkyl group, a cycloalkyl group, a cyclic aliphatic group, an aromatic ring group, an amino group, an ammonium group, a mercapto group, a cyano group, or an aldehyde group.
- these cycloaliphatic groups and aromatic ring groups may contain a hetero atom.
- At least two of Q, M, and L 1 may be bonded to each other to form a 5-membered or 6-membered ring.
- the alkyl group as L 1 and L 2 is, for example, an alkyl group having 1 to 8 carbon atoms, and specifically includes a methyl group, an ethyl group, a propyl group, an n-butyl group, a sec-butyl group, a hexyl group, and An octyl group is mentioned.
- the cycloalkyl group as L 1 and L 2 is, for example, a cycloalkyl group having 3 to 15 carbon atoms, and specific examples include a cyclopentyl group, a cyclohexyl group, a norbornyl group, and an adamantyl group.
- the aryl group as L 1 and L 2 is, for example, an aryl group having 6 to 15 carbon atoms, and specific examples include a phenyl group, a tolyl group, a naphthyl group, and an anthryl group.
- the aralkyl group as L 1 and L 2 is, for example, an aralkyl group having 6 to 20 carbon atoms, and specific examples include a benzyl group and a phenethyl group.
- the divalent linking group as M is, for example, an alkylene group (for example, methylene group, ethylene group, propylene group, butylene group, hexylene group or octylene group), cycloalkylene group (for example, cyclopentylene group or cyclohexylene group). ), Alkenylene group (for example, ethylene group, propenylene group or butenylene group), arylene group (for example, phenylene group, tolylene group or naphthylene group), —S—, —O—, —CO—, —SO 2 —, — N (R 0 ) — or a combination of two or more thereof.
- alkylene group for example, methylene group, ethylene group, propylene group, butylene group, hexylene group or octylene group
- cycloalkylene group for example, cyclopentylene group or cyclohexylene group.
- R 0 is a hydrogen atom or an alkyl group.
- the alkyl group as R 0 is, for example, an alkyl group having 1 to 8 carbon atoms, and specifically includes a methyl group, an ethyl group, a propyl group, an n-butyl group, a sec-butyl group, a hexyl group, and an octyl group. Can be mentioned.
- Alkyl group and cycloalkyl group as Q are the same as the respective groups represented by L 1 and L 2 as described above.
- Examples of the cyclic aliphatic group or aromatic ring group as Q include the cycloalkyl group and aryl group as L 1 and L 2 described above. These cycloalkyl group and aryl group are preferably groups having 3 to 15 carbon atoms.
- Examples of the cycloaliphatic group or aromatic ring group containing a hetero atom as Q include thiirane, cyclothiolane, thiophene, furan, pyrrole, benzothiophene, benzofuran, benzopyrrole, triazine, imidazole, benzimidazole, triazole, thiadiazole, And groups having a heterocyclic structure such as thiazole and pyrrolidone.
- the ring is not limited to these as long as it is a ring formed of carbon and a heteroatom, or a ring formed only of a heteroatom.
- Examples of the ring structure that can be formed by bonding at least two of Q, M, and L 1 to each other include a 5-membered or 6-membered ring structure in which these form a propylene group or a butylene group.
- This 5-membered or 6-membered ring structure contains an oxygen atom.
- Each group represented by L 1 , L 2 , M and Q in the general formula (B) may have a substituent.
- this substituent include alkyl groups, cycloalkyl groups, aryl groups, amino groups, amide groups, ureido groups, urethane groups, hydroxyl groups, carboxyl groups, halogen atoms, alkoxy groups, thioether groups, acyl groups, and acyloxy groups. , Alkoxycarbonyl group, cyano group and nitro group. These substituents preferably have 8 or less carbon atoms.
- the group represented by-(MQ) is preferably a group having 1 to 20 carbon atoms, more preferably a group having 1 to 10 carbon atoms, and still more preferably 1 to 8 carbon atoms.
- tBu represents a t-butyl group.
- resin (A) does not contain a fluorine atom and a silicon atom from a compatible viewpoint with the hydrophobic resin mentioned later.
- the resin (A) used in the composition of the present invention is preferably such that all of the repeating units are composed of (meth) acrylate-based repeating units.
- all of the repeating units are methacrylate repeating units, all of the repeating units are acrylate repeating units, or all of the repeating units are methacrylate repeating units and acrylate repeating units.
- the acrylate-based repeating unit is preferably 50 mol% or less of the total repeating units.
- a copolymer having 5 to 30 mol% of a (meth) acrylate-based repeating unit having a structure and 0 to 20 mol% of another (meth) acrylate-based repeating unit is also preferred.
- the resin (A) in the present invention can be synthesized according to a conventional method (for example, radical polymerization).
- a conventional method for example, radical polymerization
- a monomer polymerization method in which a monomer species and an initiator are dissolved in a solvent and the polymerization is performed by heating, and a solution of the monomer species and the initiator is dropped into the heating solvent over 1 to 10 hours.
- the dropping polymerization method is added, and the dropping polymerization method is preferable.
- reaction solvent examples include ethers such as tetrahydrofuran, 1,4-dioxane, diisopropyl ether, ketones such as methyl ethyl ketone and methyl isobutyl ketone, ester solvents such as ethyl acetate, amide solvents such as dimethylformamide and dimethylacetamide, Furthermore, the solvent which melt
- the polymerization reaction is preferably performed in an inert gas atmosphere such as nitrogen or argon.
- a polymerization initiator a commercially available radical initiator (azo initiator, peroxide, etc.) is used to initiate the polymerization.
- azo initiator an azo initiator is preferable, and an azo initiator having an ester group, a cyano group, or a carboxyl group is preferable.
- Preferred initiators include azobisisobutyronitrile, azobisdimethylvaleronitrile, dimethyl 2,2′-azobis (2-methylpropionate) and the like.
- an initiator is added or added in portions, and after completion of the reaction, it is put into a solvent and a desired polymer is recovered by a method such as powder or solid recovery.
- the concentration of the reaction is 5 to 50% by mass, preferably 10 to 30% by mass.
- the reaction temperature is usually 10 ° C. to 150 ° C., preferably 30 ° C. to 120 ° C., more preferably 60 to 100 ° C.
- the weight average molecular weight of the resin (A) of the present invention is preferably 1,000 to 200,000, more preferably 2,000 to 20,000, still more preferably 3, as a polystyrene converted value by GPC method. 000 to 15,000, particularly preferably 3,000 to 11,000.
- the degree of dispersion is usually 1.0 to 3.0, preferably 1.0 to 2.6, more preferably 1.0 to 2.0, and particularly preferably 1.1 to 2.0. Those in the range are used.
- the content of the resin (A) in the entire composition is preferably from 30 to 99 mass%, more preferably from 50 to 95 mass%, based on the total solid content.
- resin (A) may be used by 1 type and may be used together.
- the composition of the present invention may contain a hydrophobic resin.
- the hydrophobic resin is preferably different from the resin (A).
- the hydrophobic resin is preferably designed to be unevenly distributed at the interface as described above. However, unlike the surfactant, it is not always necessary to have a hydrophilic group in the molecule, and the polar / nonpolar substance is mixed uniformly. You don't have to contribute to
- Examples of the effects of adding the hydrophobic resin include control of the static / dynamic contact angle of the resist film surface with respect to water, improvement of immersion liquid followability, and suppression of outgas.
- the hydrophobic resin has at least one of “fluorine atom”, “silicon atom”, and “CH 3 partial structure contained in the side chain portion of the resin” from the viewpoint of uneven distribution in the film surface layer. It is preferable to have two or more types.
- the fluorine atom and / or silicon atom in the hydrophobic resin may be contained in the main chain of the resin or in the side chain. It may be.
- the hydrophobic resin contains a fluorine atom
- it may be a resin having an alkyl group having a fluorine atom, a cycloalkyl group having a fluorine atom, or an aryl group having a fluorine atom as a partial structure having a fluorine atom. preferable.
- the alkyl group having a fluorine atom (preferably having 1 to 10 carbon atoms, more preferably 1 to 4 carbon atoms) is a linear or branched alkyl group in which at least one hydrogen atom is substituted with a fluorine atom. It may have a substituent other than.
- the cycloalkyl group having a fluorine atom is a monocyclic or polycyclic cycloalkyl group in which at least one hydrogen atom is substituted with a fluorine atom, and may further have a substituent other than a fluorine atom.
- aryl group having a fluorine atom examples include those in which at least one hydrogen atom of an aryl group such as a phenyl group or a naphthyl group is substituted with a fluorine atom, and may further have a substituent other than a fluorine atom. .
- alkyl group having a fluorine atom examples include groups represented by the following general formulas (F2) to (F4).
- the invention is not limited to this.
- R 57 to R 68 each independently represents a hydrogen atom, a fluorine atom or an alkyl group (straight or branched).
- R 57 to R 61 , at least one of R 62 to R 64 , and at least one of R 65 to R 68 are each independently a fluorine atom or at least one hydrogen atom is a fluorine atom. It represents a substituted alkyl group (preferably having 1 to 4 carbon atoms).
- R 57 to R 61 and R 65 to R 67 are preferably fluorine atoms.
- R 62 , R 63 and R 68 are preferably an alkyl group (preferably having 1 to 4 carbon atoms) in which at least one hydrogen atom is substituted with a fluorine atom, and preferably a perfluoroalkyl group having 1 to 4 carbon atoms. Further preferred. R 62 and R 63 may be connected to each other to form a ring.
- Specific examples of the group represented by the general formula (F2) include a p-fluorophenyl group, a pentafluorophenyl group, and a 3,5-di (trifluoromethyl) phenyl group.
- Specific examples of the group represented by the general formula (F4) include, for example, —C (CF 3 ) 2 OH, —C (C 2 F 5 ) 2 OH, —C (CF 3 ) (CH 3 ) OH, —CH (CF 3 ) OH and the like are mentioned, and —C (CF 3 ) 2 OH is preferable.
- the partial structure containing a fluorine atom may be directly bonded to the main chain, and further from the group consisting of an alkylene group, a phenylene group, an ether bond, a thioether bond, a carbonyl group, an ester bond, an amide bond, a urethane bond and a ureylene bond. You may couple
- the hydrophobic resin may contain silicon atoms.
- the partial structure having a silicon atom is preferably a resin having an alkylsilyl structure (preferably a trialkylsilyl group) or a cyclic siloxane structure.
- alkylsilyl structure or the cyclic siloxane structure examples include partial structures described in paragraphs [0304] to [0307] of JP2013-178370A.
- repeating unit having a fluorine atom or a silicon atom examples include those exemplified in US2012 / 0251948A1 [0519].
- the hydrophobic resin preferably includes a CH 3 partial structure in the side chain portion.
- the CH 3 partial structure of the side chain portion in the hydrophobic resin includes a CH 3 partial structure of an ethyl group, a propyl group, or the like. Is.
- methyl groups directly bonded to the main chain of the hydrophobic resin (for example, ⁇ -methyl groups of repeating units having a methacrylic acid structure) contribute to the uneven distribution of the surface of the hydrophobic resin due to the influence of the main chain. Since it is small, it is not included in the CH 3 partial structure in the present invention.
- the hydrophobic resin includes a repeating unit derived from a monomer having a polymerizable moiety having a carbon-carbon double bond, such as a repeating unit represented by the following general formula (M)
- R 11 to R 14 are CH 3 “as is”
- the CH 3 is not included in the CH 3 partial structure of the side chain moiety in the present invention.
- CH 3 partial structure exists through some atoms from C-C backbone, and those falling under CH 3 partial structures in the present invention.
- R 11 is an ethyl group (CH 2 CH 3 )
- R 11 to R 14 each independently represents a side chain portion.
- R 11 to R 14 in the side chain portion include a hydrogen atom and a monovalent organic group.
- Examples of the monovalent organic group for R 11 to R 14 include an alkyl group, a cycloalkyl group, an aryl group, an alkyloxycarbonyl group, a cycloalkyloxycarbonyl group, an aryloxycarbonyl group, an alkylaminocarbonyl group, and a cycloalkylaminocarbonyl.
- Group, an arylaminocarbonyl group, and the like, and these groups may further have a substituent.
- the hydrophobic resin is preferably a resin having a repeating unit having a CH 3 partial structure in the side chain portion.
- the repeating unit represented by the following general formula (II) and the following general unit It is more preferable to have at least one repeating unit (x) among the repeating units represented by the formula (III).
- the repeating unit represented by formula (II) will be described in detail.
- X b1 represents a hydrogen atom, an alkyl group, a cyano group or a halogen atom
- R 2 has one or more CH 3 partial structure represents a stable organic radical to acid.
- the organic group that is stable to acid is more preferably an organic group that does not have the “acid-decomposable group” described in the resin (A).
- the alkyl group of Xb1 preferably has 1 to 4 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a hydroxymethyl group, and a trifluoromethyl group, and a methyl group is preferable.
- X b1 is preferably a hydrogen atom or a methyl group.
- R 2 examples include an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an aryl group, and an aralkyl group having one or more CH 3 partial structures.
- the above cycloalkyl group, alkenyl group, cycloalkenyl group, aryl group and aralkyl group may further have an alkyl group as a substituent.
- R 2 is preferably an alkyl group or an alkyl-substituted cycloalkyl group having one or more CH 3 partial structures.
- the acid-stable organic group having one or more CH 3 partial structures as R 2 preferably has 2 or more and 10 or less CH 3 partial structures, and more preferably 2 or more and 8 or less.
- the repeating unit represented by the general formula (II) is preferably an acid-stable (non-acid-decomposable) repeating unit, and specifically, a group that decomposes by the action of an acid to generate a polar group. It is preferable that it is a repeating unit which does not have.
- X b2 represents a hydrogen atom, an alkyl group, a cyano group, or a halogen atom
- R 3 represents an acid-stable organic group having one or more CH 3 partial structures
- n represents an integer of 1 to 5.
- the alkyl group of Xb2 is preferably an alkyl group having 1 to 4 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a hydroxymethyl group, and a trifluoromethyl group, and a hydrogen atom is preferable.
- X b2 is preferably a hydrogen atom.
- R 3 is an organic group that is stable against acid, more specifically, R 3 is preferably an organic group that does not have the “acid-decomposable group” described in the resin (A).
- R 3 includes an alkyl group having one or more CH 3 partial structures.
- the acid-stable organic group having one or more CH 3 partial structures as R 3 preferably has 1 or more and 10 or less CH 3 partial structures, more preferably 1 or more and 8 or less, More preferably, it is 1 or more and 4 or less.
- N represents an integer of 1 to 5, more preferably an integer of 1 to 3, and still more preferably 1 or 2.
- the repeating unit represented by the general formula (III) is preferably an acid-stable (non-acid-decomposable) repeating unit, specifically, a group that decomposes by the action of an acid to generate a polar group. It is preferable that it is a repeating unit which does not have.
- the repeating unit represented by the general formula (II) and the general formula (S) is preferably 90 mol% or more, more preferably 95 mol% or more, based on all repeating units of the hydrophobic resin. It is more preferable. Content is 100 mol% or less normally with respect to all the repeating units of hydrophobic resin.
- the hydrophobic resin contains at least one repeating unit (x) among the repeating units represented by the general formula (II) and the repeating unit represented by the general formula (III) as all repeating units of the hydrophobic resin.
- the surface free energy of hydrophobic resin increases by containing 90 mol% or more. As a result, the hydrophobic resin is less likely to be unevenly distributed on the surface of the resist film, so that the static / dynamic contact angle of the resist film with respect to water can be reliably improved and the immersion liquid followability can be improved.
- the hydrophobic resin includes the following groups (x) to (z) regardless of whether (i) it contains a fluorine atom and / or a silicon atom, or (ii) contains a CH 3 partial structure in the side chain portion. It may have at least one group selected from
- Preferred acid groups include fluorinated alcohol groups (preferably hexafluoroisopropanol), sulfonimide groups, and bis (alkylcarbonyl) methylene groups.
- the repeating unit having an acid group (x) includes a repeating unit in which an acid group is directly bonded to the main chain of the resin, such as a repeating unit of acrylic acid or methacrylic acid, or a resin having a linking group. Examples include a repeating unit in which an acid group is bonded to the main chain, and a polymerization initiator or chain transfer agent having an acid group can be introduced at the end of the polymer chain at the time of polymerization. preferable.
- the repeating unit having an acid group (x) may have at least one of a fluorine atom and a silicon atom.
- the content of the repeating unit having an acid group (x) is preferably from 1 to 50 mol%, more preferably from 3 to 35 mol%, still more preferably from 5 to 20 mol%, based on all repeating units in the hydrophobic resin. It is.
- Rx represents a hydrogen atom, CH 3 , CF 3 , or CH 2 OH.
- the group having a lactone structure As the group having a lactone structure, the acid anhydride group, or the acid imide group (y), a group having a lactone structure is particularly preferable.
- the repeating unit containing these groups is a repeating unit in which this group is bonded directly to the main chain of the resin, such as a repeating unit of acrylic ester and methacrylic ester.
- this repeating unit may be a repeating unit in which this group is bonded to the main chain of the resin via a linking group.
- this repeating unit may be introduce
- repeating unit having a group having a lactone structure examples include those similar to the repeating unit having a lactone structure described above in the section of the resin (A).
- the content of the repeating unit having a group having a lactone structure, an acid anhydride group, or an acid imide group is preferably 1 to 100 mol% based on all repeating units in the hydrophobic resin. It is more preferably mol%, and further preferably 5 to 95 mol%.
- Examples of the repeating unit having a group (z) capable of decomposing by the action of an acid in the hydrophobic resin include the same repeating units having an acid-decomposable group as mentioned for the resin (A).
- the repeating unit having a group (z) that decomposes by the action of an acid may have at least one of a fluorine atom and a silicon atom.
- the content of the repeating unit having a group (z) that is decomposed by the action of an acid is preferably 1 to 80 mol%, more preferably 10 to 10%, based on all repeating units in the hydrophobic resin. 80 mol%, more preferably 20 to 60 mol%.
- the hydrophobic resin may further have a repeating unit represented by the following general formula (III).
- R c31 represents a hydrogen atom, an alkyl group (which may be substituted with a fluorine atom or the like), a cyano group, or a —CH 2 —O—Rac 2 group.
- Rac 2 represents a hydrogen atom, an alkyl group or an acyl group.
- R c31 is preferably a hydrogen atom, a methyl group, a hydroxymethyl group or a trifluoromethyl group, particularly preferably a hydrogen atom or a methyl group.
- R c32 represents a group having an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aryl group. These groups may be substituted with a group containing a fluorine atom or a silicon atom.
- L c3 represents a single bond or a divalent linking group.
- the alkyl group represented by R c32 is preferably a linear or branched alkyl group having 3 to 20 carbon atoms.
- the cycloalkyl group is preferably a cycloalkyl group having 3 to 20 carbon atoms.
- the alkenyl group is preferably an alkenyl group having 3 to 20 carbon atoms.
- the cycloalkenyl group is preferably a cycloalkenyl group having 3 to 20 carbon atoms.
- the aryl group is preferably an aryl group having 6 to 20 carbon atoms, more preferably a phenyl group or a naphthyl group, and these may have a substituent.
- R c32 is preferably an unsubstituted alkyl group or an alkyl group substituted with a fluorine atom.
- the divalent linking group of L c3 is preferably an alkylene group (preferably having a carbon number of 1 to 5), an ether bond, a phenylene group, or an ester bond (a group represented by —COO—).
- the content of the repeating unit represented by the general formula (III) is preferably 1 to 100 mol%, more preferably 10 to 90 mol%, based on all repeating units in the hydrophobic resin. 30 to 70 mol% is more preferable.
- the hydrophobic resin preferably further has a repeating unit represented by the following general formula (CII-AB).
- R c11 ′ and R c12 ′ each independently represents a hydrogen atom, a cyano group, a halogen atom or an alkyl group.
- Zc ′ represents an atomic group for forming an alicyclic structure containing two bonded carbon atoms (C—C).
- the content of the repeating unit represented by the general formula (CII-AB) is preferably 1 to 100 mol%, based on all repeating units in the hydrophobic resin, and preferably 10 to 90 mol%. More preferred is 30 to 70 mol%.
- Ra represents H, CH 3 , CH 2 OH, CF 3 or CN.
- the fluorine atom content is preferably 5 to 80% by mass and more preferably 10 to 80% by mass with respect to the weight average molecular weight of the hydrophobic resin.
- the repeating unit containing a fluorine atom is preferably 10 to 100 mol%, more preferably 30 to 100 mol% in all repeating units contained in the hydrophobic resin.
- the content of silicon atoms is preferably 2 to 50% by mass, more preferably 2 to 30% by mass with respect to the weight average molecular weight of the hydrophobic resin.
- the repeating unit containing a silicon atom is preferably 10 to 100 mol%, and more preferably 20 to 100 mol% in all repeating units contained in the hydrophobic resin.
- the hydrophobic resin contains a CH 3 partial structure in the side chain portion, it is also preferred that the hydrophobic resin does not substantially contain a fluorine atom and a silicon atom.
- the content of the repeating unit having an atom or silicon atom is preferably 5 mol% or less, more preferably 3 mol% or less, more preferably 1 mol% or less, based on all repeating units in the hydrophobic resin. More preferably, it is ideally 0 mol%, ie it does not contain fluorine and silicon atoms.
- hydrophobic resin is substantially comprised only by the repeating unit comprised only by the atom chosen from a carbon atom, an oxygen atom, a hydrogen atom, a nitrogen atom, and a sulfur atom. More specifically, it is preferable that the repeating unit composed only of atoms selected from a carbon atom, an oxygen atom, a hydrogen atom, a nitrogen atom and a sulfur atom is 95 mol% or more in the total repeating units of the hydrophobic resin. 97 mol% or more is more preferable, 99 mol% or more is further preferable, and ideally 100 mol%.
- the weight average molecular weight of the hydrophobic resin in terms of standard polystyrene is preferably 1,000 to 100,000, more preferably 1,000 to 50,000, and still more preferably 2,000 to 15,000.
- the hydrophobic resin may be used alone or in combination.
- the content of the hydrophobic resin in the composition is preferably 0.01 to 10% by mass, more preferably 0.05 to 8% by mass, and more preferably 0.1 to 10% by mass with respect to the total solid content in the composition of the present invention. 7 mass% is still more preferable.
- the hydrophobic resin has a small amount of impurities such as metals, and the residual monomer or oligomer component is preferably 0.01 to 5% by mass, more preferably 0.01 to 3% by mass, 0.05 to 1% by mass is even more preferred.
- the molecular weight distribution (Mw / Mn, also referred to as dispersity) is preferably in the range of 1 to 5, more preferably 1 to 3, and still more preferably from the viewpoints of resolution, resist shape, resist pattern sidewall, roughness, and the like. It is in the range of 1-2.
- hydrophobic resin various commercially available products can be used, and can be synthesized according to a conventional method (for example, radical polymerization).
- a conventional method for example, radical polymerization
- a monomer polymerization method in which a monomer species and an initiator are dissolved in a solvent and the polymerization is performed by heating, and a solution of the monomer species and the initiator is dropped into the heating solvent over 1 to 10 hours.
- the dropping polymerization method is added, and the dropping polymerization method is preferable.
- reaction solvent the polymerization initiator, the reaction conditions (temperature, concentration, etc.) and the purification method after the reaction are the same as described in the resin (A), but in the synthesis of the hydrophobic resin, the reaction concentration Is preferably 30 to 50% by mass.
- hydrophobic resin examples include the hydrophobic resin (corresponding to each repeating unit in order from the left), the weight average molecular weight, and the degree of dispersion.
- the composition of the present invention preferably contains an acid diffusion controller (D).
- the acid diffusion controller (D) acts as a quencher that traps the acid generated from the acid generator or the like during exposure and suppresses the reaction of the acid-decomposable resin in the unexposed area due to excess generated acid.
- Examples of the acid diffusion controller (D) include a basic compound having a nitrogen atom, a low molecular compound having a nitrogen atom and a group capable of leaving by the action of an acid, or a decrease in basicity upon irradiation with actinic rays or radiation.
- a basic compound that disappears or an onium salt that becomes a weak acid relative to the acid generator can be used.
- Preferred examples of the basic compound having a nitrogen atom include compounds having structures represented by the following formulas (A) to (E).
- R 200 , R 201 and R 202 may be the same or different and are a hydrogen atom, an alkyl group (preferably having a carbon number of 1 to 20), a cycloalkyl group (preferably having a carbon number of 3 to 20) or an aryl group (having a carbon number). 6-20), wherein R 201 and R 202 may combine with each other to form a ring.
- R 203 , R 204 , R 205 and R 206 may be the same or different and each represents an alkyl group having 1 to 20 carbon atoms.
- the alkyl group having a substituent is preferably an aminoalkyl group having 1 to 20 carbon atoms, a hydroxyalkyl group having 1 to 20 carbon atoms, or a cyanoalkyl group having 1 to 20 carbon atoms.
- alkyl groups in general formulas (A) and (E) are more preferably unsubstituted.
- Preferred compounds include guanidine, aminopyrrolidine, pyrazole, pyrazoline, piperazine, aminomorpholine, aminoalkylmorpholine, piperidine and the like, and more preferred compounds include imidazole structure, diazabicyclo structure, onium hydroxide structure, onium carboxylate Examples thereof include a compound having a structure, a trialkylamine structure, an aniline structure or a pyridine structure, an alkylamine derivative having a hydroxyl group and / or an ether bond, and an aniline derivative having a hydroxyl group and / or an ether bond.
- preferable compounds include compounds exemplified in US2012 / 0219913A1 [0379].
- Preferred examples of the basic compound further include an amine compound having a phenoxy group, an ammonium salt compound having a phenoxy group, an amine compound having a sulfonic acid ester group, and an ammonium salt compound having a sulfonic acid ester group.
- amine compound a primary, secondary or tertiary amine compound can be used, and an amine compound in which at least one alkyl group is bonded to a nitrogen atom is preferable.
- the amine compound is more preferably a tertiary amine compound.
- the amine compound has an cycloalkyl group (preferably having 3 to 20 carbon atoms) or an aryl group (preferably having 3 to 20 carbon atoms).
- 6 to 12 carbon atoms may be bonded to the nitrogen atom.
- the amine compound preferably has an oxygen atom in the alkyl chain and an oxyalkylene group is formed.
- the number of oxyalkylene groups is one or more in the molecule, preferably 3 to 9, and more preferably 4 to 6.
- an oxyethylene group (—CH 2 CH 2 O—) or an oxypropylene group (—CH (CH 3 ) CH 2 O— or —CH 2 CH 2 CH 2 O—) is preferable, and more preferably oxy Ethylene group.
- ammonium salt compound a primary, secondary, tertiary or quaternary ammonium salt compound can be used, and an ammonium salt compound in which at least one alkyl group is bonded to a nitrogen atom is preferable.
- the ammonium salt compound may be a cycloalkyl group (preferably having 3 to 20 carbon atoms) or an aryl group, provided that at least one alkyl group (preferably having 1 to 20 carbon atoms) is bonded to the nitrogen atom. (Preferably having 6 to 12 carbon atoms) may be bonded to a nitrogen atom.
- the ammonium salt compound preferably has an oxygen atom in the alkyl chain and an oxyalkylene group is formed.
- the number of oxyalkylene groups is one or more in the molecule, preferably 3 to 9, and more preferably 4 to 6.
- an oxyethylene group (—CH 2 CH 2 O—) or an oxypropylene group (—CH (CH 3 ) CH 2 O— or —CH 2 CH 2 CH 2 O—) is preferable, and more preferably oxy Ethylene group.
- anion of the ammonium salt compound examples include halogen atoms, sulfonates, borates, and phosphates. Among them, halogen atoms and sulfonates are preferable.
- the following compounds are also preferable as the basic compound.
- JP2011-22560A [0180] to [0225], JP2012-137735A [0218] to [0219], International Publication Pamphlet WO2011 / 158687A1 [ [0416] to [0438] can also be used.
- the composition of the present invention may or may not contain a basic compound.
- the content of the basic compound is usually 0.001 to 10 mass based on the solid content of the composition. %, Preferably 0.01 to 5% by mass.
- the molar ratio is preferably 2.5 or more from the viewpoint of sensitivity and resolution, and is preferably 300 or less from the viewpoint of suppressing the reduction in resolution due to the thickening of the resist pattern over time until post-exposure heat treatment.
- the acid generator / basic compound (molar ratio) is more preferably from 5.0 to 200, still more preferably from 7.0 to 150.
- a low molecular weight compound having a nitrogen atom and having a group capable of leaving by the action of an acid (hereinafter also referred to as “compound (D-1)”) has a group on the nitrogen atom that is leaving by the action of an acid.
- An amine derivative is preferred.
- an acetal group, a carbonate group, a carbamate group, a tertiary ester group, a tertiary hydroxyl group, and a hemiaminal ether group are preferable, and a carbamate group and a hemiaminal ether group are particularly preferable.
- the molecular weight of the compound (D-1) is preferably 100 to 1000, more preferably 100 to 700, and particularly preferably 100 to 500.
- Compound (D-1) may have a carbamate group having a protecting group on the nitrogen atom.
- the protecting group constituting the carbamate group can be represented by the following general formula (d-1).
- Rb each independently represents a hydrogen atom, an alkyl group (preferably 1 to 10 carbon atoms), a cycloalkyl group (preferably 3 to 30 carbon atoms), an aryl group (preferably 3 to 30 carbon atoms), an aralkyl group ( Preferably, it represents 1 to 10 carbon atoms) or an alkoxyalkyl group (preferably 1 to 10 carbon atoms).
- Rb may be connected to each other to form a ring.
- the alkyl group, cycloalkyl group, aryl group, and aralkyl group represented by Rb are substituted with a functional group such as hydroxyl group, cyano group, amino group, pyrrolidino group, piperidino group, morpholino group, oxo group, alkoxy group, or halogen atom. It may be. The same applies to the alkoxyalkyl group represented by Rb.
- Rb is preferably a linear or branched alkyl group, cycloalkyl group, or aryl group. More preferably, it is a linear or branched alkyl group or cycloalkyl group.
- Examples of the ring formed by connecting two Rb to each other include an alicyclic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic hydrocarbon group, or a derivative thereof.
- the compound (D-1) particularly preferably has a structure represented by the following general formula (6).
- Ra represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group.
- l 2
- two Ras may be the same or different, and two Ras may be connected to each other to form a heterocyclic ring together with the nitrogen atom in the formula.
- the heterocyclic ring may contain a hetero atom other than the nitrogen atom in the formula.
- Rb has the same meaning as Rb in formula (d-1), and preferred examples are also the same.
- L represents an integer of 0 to 2
- m represents an integer of 1 to 3
- satisfies l + m 3.
- the alkyl group, cycloalkyl group, aryl group and aralkyl group as Ra are described above as the groups in which the alkyl group, cycloalkyl group, aryl group and aralkyl group as Rb may be substituted. It may be substituted with a group similar to the group.
- Ra alkyl group, cycloalkyl group, aryl group, and aralkyl group examples include: The same group as the specific example mentioned above about Rb is mentioned.
- particularly preferable compound (D-1) in the present invention include compounds disclosed in US2012 / 0135348 A1 [0475], but are not limited thereto.
- the compound represented by the general formula (6) can be synthesized based on JP2007-298569A, JP2009-199021A, and the like.
- the compound (D-1) can be used singly or in combination of two or more.
- the content of the compound (D-1) in the composition of the present invention is preferably 0.001 to 20% by mass, more preferably 0.001 to 10% by mass, based on the total solid content of the composition. More preferably, the content is 0.01 to 5% by mass.
- a basic compound whose basicity decreases or disappears upon irradiation with actinic rays or radiation (hereinafter also referred to as “compound (PA)”) has a proton acceptor functional group and is irradiated with actinic rays or radiation. Is a compound whose proton acceptor properties are degraded, disappeared, or changed from proton acceptor properties to acidic properties.
- the proton acceptor functional group is a group that can interact electrostatically with a proton or a functional group having an electron.
- a functional group having a macrocyclic structure such as a cyclic polyether or a ⁇ -conjugated group. It means a functional group having a nitrogen atom with an unshared electron pair that does not contribute.
- the nitrogen atom having an unshared electron pair that does not contribute to ⁇ conjugation is, for example, a nitrogen atom having a partial structure represented by the following formula.
- Examples of a preferable partial structure of the proton acceptor functional group include a crown ether, an azacrown ether, a primary to tertiary amine, a pyridine, an imidazole, and a pyrazine structure.
- the compound (PA) is decomposed by irradiation with actinic rays or radiation to generate a compound whose proton acceptor property is lowered, disappeared, or changed from proton acceptor property to acidity.
- the decrease or disappearance of the proton acceptor property or the change from the proton acceptor property to the acid is a change in the proton acceptor property caused by the addition of a proton to the proton acceptor functional group.
- Proton acceptor properties can be confirmed by measuring pH.
- the acid dissociation constant pKa of the compound generated by decomposition of the compound (PA) upon irradiation with actinic rays or radiation preferably satisfies pKa ⁇ 1, more preferably ⁇ 13 ⁇ pKa ⁇ 1. More preferably, ⁇ 13 ⁇ pKa ⁇ 3.
- the acid dissociation constant pKa represents the acid dissociation constant pKa in an aqueous solution.
- Chemical Handbook (II) (4th revised edition, 1993, edited by the Chemical Society of Japan, Maruzen Co., Ltd.) It shows that acid strength is so large that this value is low.
- the acid dissociation constant pKa in an aqueous solution can be measured by measuring an acid dissociation constant at 25 ° C. using an infinitely diluted aqueous solution, and using the following software package 1, Hammett
- the values based on the substituent constants and the database of known literature values can also be obtained by calculation.
- the values of pKa described in this specification all indicate values obtained by calculation using this software package.
- the compound (PA) generates, for example, a compound represented by the following general formula (PA-1) as the proton adduct generated by decomposition upon irradiation with actinic rays or radiation. Since the compound represented by the general formula (PA-1) has an acidic group together with the proton acceptor functional group, the proton acceptor property is reduced or disappeared compared to the compound (PA), or the proton acceptor property is reduced. It is a compound that has changed to acidic.
- PA-1 a compound represented by the following general formula (PA-1) as the proton adduct generated by decomposition upon irradiation with actinic rays or radiation. Since the compound represented by the general formula (PA-1) has an acidic group together with the proton acceptor functional group, the proton acceptor property is reduced or disappeared compared to the compound (PA), or the proton acceptor property is reduced. It is a compound that has changed to acidic.
- Q represents —SO 3 H, —CO 2 H, or —W 1 NHW 2 R f .
- R f represents an alkyl group (preferably having 1 to 20 carbon atoms), a cycloalkyl group (preferably having 3 to 20 carbon atoms) or an aryl group (preferably having 6 to 30 carbon atoms), and W 1 and W 2 each independently represents —SO 2 — or —CO—.
- A represents a single bond or a divalent linking group.
- X represents —SO 2 — or —CO—.
- N 0 or 1.
- R x represents a hydrogen atom or a monovalent organic group
- R y represents a single bond or a divalent organic group.
- R x may be bonded to R y to form a ring, or R x may be bonded to R to form a ring.
- R represents a monovalent organic group having a proton acceptor functional group.
- the divalent linking group in A is preferably a divalent linking group having 2 to 12 carbon atoms, and examples thereof include an alkylene group and a phenylene group. More preferred is an alkylene group having at least one fluorine atom, and the preferred carbon number is 2 to 6, more preferably 2 to 4.
- the alkylene chain may have a linking group such as an oxygen atom or a sulfur atom.
- the alkylene group is particularly preferably an alkylene group in which 30 to 100% of the hydrogen atoms are substituted with fluorine atoms, and more preferably, the carbon atom bonded to the Q site has a fluorine atom.
- a perfluoroalkylene group is preferable, and a perfluoroethylene group, a perfluoropropylene group, and a perfluorobutylene group are more preferable.
- the monovalent organic group in Rx is preferably an organic group having 1 to 30 carbon atoms, and examples thereof include an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, and an alkenyl group. These groups may further have a substituent.
- the alkyl group in Rx may have a substituent, and is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and has an oxygen atom, a sulfur atom, or a nitrogen atom in the alkyl chain. May be.
- the cycloalkyl group in Rx may have a substituent, and is preferably a monocyclic cycloalkyl group or a polycyclic cycloalkyl group having 3 to 20 carbon atoms, and an oxygen atom, a sulfur atom, a nitrogen atom in the ring You may have an atom.
- the aryl group in Rx may have a substituent, and preferably has 6 to 14 carbon atoms, and examples thereof include a phenyl group and a naphthyl group.
- the aralkyl group in Rx may have a substituent, and preferably has 7 to 20 carbon atoms, and examples thereof include a benzyl group and a phenethyl group.
- the alkenyl group in Rx may have a substituent, may be linear, or may be branched.
- the alkenyl group preferably has 3 to 20 carbon atoms. Examples of such alkenyl groups include vinyl groups, allyl groups, and styryl groups.
- Rx further has a substituent
- substituents include, for example, a halogen atom, a linear, branched or cyclic alkyl group, alkenyl group, alkynyl group, aryl group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl Group, cyano group, carboxyl group, hydroxyl group, alkoxy group, aryloxy group, alkylthio group, arylthio group, heterocyclic oxy group, acyloxy group, amino group, nitro group, hydrazino group, heterocyclic group and the like.
- Preferred examples of the divalent organic group in Ry include an alkylene group.
- Examples of the ring structure that Rx and Ry may be bonded to each other include a 5- to 10-membered ring containing a nitrogen atom, particularly preferably a 6-membered ring.
- the proton acceptor functional group in R is as described above, and examples thereof include azacrown ether, primary to tertiary amines, and groups having a heterocyclic aromatic structure containing nitrogen such as pyridine and imidazole.
- the organic group having such a structure is preferably an organic group having 4 to 30 carbon atoms, and examples thereof include an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, and an alkenyl group.
- the alkyl group, the cycloalkyl group, the aryl group, the aralkyl group, the alkyl group in the alkenyl group, the cycloalkyl group, the aryl group, the aralkyl group, and the alkenyl group in R include a proton acceptor functional group or an ammonium group.
- a proton acceptor functional group or an ammonium group are the same as the alkyl group, cycloalkyl group, aryl group, aralkyl group and alkenyl group mentioned above.
- R and Rx are preferably bonded to each other to form a ring.
- the number of carbon atoms forming the ring is preferably 4 to 20, and may be monocyclic or polycyclic, and may contain an oxygen atom, a sulfur atom, or a nitrogen atom in the ring.
- Examples of the monocyclic structure include a 4-membered ring, a 5-membered ring, a 6-membered ring, a 7-membered ring, and an 8-membered ring containing a nitrogen atom.
- Examples of the polycyclic structure include a structure composed of a combination of two or three or more monocyclic structures.
- R f in -W 1 NHW 2 R f represented by Q preferred is an alkyl group which may have a fluorine atom of 1 to 6 carbon atoms, more preferably perfluoroalkyl of 1 to 6 carbon atoms It is a group.
- W 1 and W 2 at least one is preferably —SO 2 —, and more preferably, both W 1 and W 2 are —SO 2 —.
- Q is particularly preferably —SO 3 H or —CO 2 H from the viewpoint of the hydrophilicity of the acid group.
- a compound in which the Q site is a sulfonic acid can be synthesized by using a general sulfonamidation reaction.
- a general sulfonamidation reaction For example, a method in which one sulfonyl halide part of a bissulfonyl halide compound is selectively reacted with an amine compound to form a sulfonamide bond, and then the other sulfonyl halide part is hydrolyzed, or a cyclic sulfonic acid anhydride is used. It can be obtained by a method of ring-opening by reacting with an amine compound.
- the compound (PA) is preferably an ionic compound.
- the proton acceptor functional group may be contained in either the anion portion or the cation portion, but is preferably contained in the anion portion.
- Preferred examples of the compound (PA) include compounds represented by the following general formulas (4) to (6).
- A, X, n, B, R, R f , W 1 and W 2 have the same meanings as those in the general formula (PA-1).
- C + represents a counter cation
- the counter cation is preferably an onium cation. More specifically, the sulfonium cation described as S + (R 201 ) (R 202 ) (R 203 ) in general formula (ZI) in the acid generator described later, I + (R 204 in general formula (ZII)) )
- the iodonium cation described as (R 205 ) is a preferred example.
- PA the compound (PA) include compounds exemplified in US2011 / 0269072A1 [0280].
- a compound (PA) other than the compound that generates the compound represented by the general formula (PA-1) can be appropriately selected.
- an ionic compound that has a proton acceptor moiety in the cation moiety may be used.
- a compound represented by the following general formula (7) is exemplified.
- A represents a sulfur atom or an iodine atom.
- M represents 1 or 2
- n 1 or 2.
- A is a sulfur atom
- m + n 3
- A is an iodine atom
- m + n 2.
- R represents an aryl group
- R N represents an aryl group substituted with a proton acceptor functional group.
- X ⁇ represents a counter anion.
- X ⁇ include the same as the above-mentioned anion of the acid generator.
- aryl group of R and R N is a phenyl group are preferably exemplified.
- proton acceptor functional group R N are the same as those of the proton acceptor functional group described in the foregoing formula (PA-1).
- ionic compound having a proton acceptor site in the cation moiety may include compounds exemplified in US2011 / 0269072A1 [0291].
- such a compound can be synthesized with reference to methods described in, for example, Japanese Patent Application Laid-Open No. 2007-230913 and Japanese Patent Application Laid-Open No. 2009-122623.
- Compound (PA) may be used alone or in combination of two or more.
- the content of the compound (PA) is preferably 0.1 to 10% by mass, more preferably 1 to 8% by mass, based on the total solid content of the composition.
- an onium salt that is a weak acid relative to the acid generator can be used as the acid diffusion controller (D).
- an acid generator and an onium salt that generates an acid that is a weak acid preferably a weak acid having a pKa of more than ⁇ 1 relative to the acid generated from the acid generator are used in combination
- a weak acid is released by salt exchange to produce an onium salt having a strong acid anion.
- the strong acid is exchanged with a weak acid having a lower catalytic ability, so that the acid is apparently deactivated and the acid diffusion can be controlled.
- the onium salt that is a weak acid relative to the acid generator is preferably a compound represented by the following general formulas (d1-1) to (d1-3).
- R 51 represents a hydrocarbon group which may have a substituent
- Z 2c represents a hydrocarbon group having 1 to 30 carbon atoms which may have a substituent (however, a carbon adjacent to S).
- R 52 is an organic group
- Y 3 is a linear, branched or cyclic alkylene group or an arylene group
- Rf is a fluorine atom.
- Each of the M + is independently a sulfonium or iodonium cation.
- Preferable examples of the sulfonium cation or iodonium cation represented by M + include the sulfonium cation exemplified for the acid generator (ZI) and the iodonium cation exemplified for (ZII).
- Preferred examples of the anion moiety of the compound represented by the general formula (d1-1) include the structures exemplified in paragraph [0198] of JP2012-242799A.
- Preferred examples of the anion moiety of the compound represented by the general formula (d1-2) include the structures exemplified in paragraph [0201] of JP2012-242799A.
- Preferred examples of the anion moiety of the compound represented by the general formula (d1-3) include the structures exemplified in paragraphs [0209] and [0210] of JP2012-242799A.
- An onium salt that is a weak acid relative to the acid generator is a compound having a cation moiety and an anion moiety in the same molecule, and the cation moiety and the anion moiety are linked by a covalent bond (hereinafter, “ Also referred to as “compound (D-2)”.
- the compound (D-2) is preferably a compound represented by any one of the following general formulas (C-1) to (C-3).
- R 1 , R 2 and R 3 represent a substituent having 1 or more carbon atoms.
- L 1 represents a divalent linking group or a single bond linking the cation moiety and the anion moiety.
- R 4 is a group having a carbonyl group: —C ( ⁇ O) —, a sulfonyl group: —S ( ⁇ O) 2 —, and a sulfinyl group: —S ( ⁇ O) — at the site of connection with the adjacent N atom. Represents a valent substituent.
- R 1 , R 2 , R 3 , R 4 and L 1 may be bonded to each other to form a ring structure.
- R 1 , R 2 , R 3 , R 4 and L 1 may be bonded to each other to form a ring structure.
- two of R 1 to R 3 may be combined to form a double bond with the N atom.
- Examples of the substituent having 1 or more carbon atoms in R 1 to R 3 include alkyl group, cycloalkyl group, aryl group, alkyloxycarbonyl group, cycloalkyloxycarbonyl group, aryloxycarbonyl group, alkylaminocarbonyl group, cycloalkylamino A carbonyl group, an arylaminocarbonyl group, etc. are mentioned. Preferably, they are an alkyl group, a cycloalkyl group, and an aryl group.
- L 1 as the divalent linking group is a linear or branched alkylene group, cycloalkylene group, arylene group, carbonyl group, ether bond, ester bond, amide bond, urethane bond, urea bond, and two types thereof. Examples include groups formed by combining the above. L 1 is more preferably an alkylene group, an arylene group, an ether bond, an ester bond, or a group formed by combining two or more of these.
- Preferable examples of the compound represented by the general formula (C-1) include paragraphs [0037] to [0039] of JP2013-6827A and paragraphs [0027] to [0029] of JP2013-8020A. ] Can be mentioned.
- Preferred examples of the compound represented by the general formula (C-2) include compounds exemplified in paragraphs [0012] to [0013] of JP2012-189977A.
- Preferred examples of the compound represented by the general formula (C-3) include compounds exemplified in paragraphs [0029] to [0031] of JP 2012-252124 A.
- the content of the onium salt that is a weak acid relative to the acid generator is preferably 0.5 to 10.0% by mass, and preferably 0.5 to 8.0% by mass based on the solid content of the composition. % Is more preferable, and 1.0 to 8.0% by mass is even more preferable.
- composition of the present invention usually contains a solvent.
- Solvents that can be used in preparing the composition include, for example, alkylene glycol monoalkyl ether carboxylates, alkylene glycol monoalkyl ethers, alkyl lactate esters, alkyl alkoxypropionates, cyclic lactones (preferably having 4 to 4 carbon atoms). 10), an organic solvent such as a monoketone compound (preferably having 4 to 10 carbon atoms) which may have a ring, alkylene carbonate, alkyl alkoxyacetate, alkyl pyruvate and the like.
- a monoketone compound preferably having 4 to 10 carbon atoms
- a mixed solvent obtained by mixing a solvent containing a hydroxyl group in the structure and a solvent not containing a hydroxyl group may be used as the organic solvent.
- the solvent containing a hydroxyl group and the solvent not containing a hydroxyl group can be selected as appropriate.
- the solvent containing a hydroxyl group alkylene glycol monoalkyl ether, alkyl lactate and the like are preferable, and propylene glycol monomethyl ether ( PGME, also known as 1-methoxy-2-propanol), ethyl lactate is more preferred.
- alkylene glycol monoalkyl ether acetate, alkyl alkoxypropionate, monoketone compound which may contain a ring, cyclic lactone, alkyl acetate and the like are preferable, and among these, propylene glycol monomethyl ether Acetate (PGMEA, also known as 1-methoxy-2-acetoxypropane), ethyl ethoxypropionate, 2-heptanone, ⁇ -butyrolactone, cyclohexanone, butyl acetate are particularly preferred, propylene glycol monomethyl ether acetate, ethyl ethoxypropionate, 2 -Heptanone is most preferred.
- PGMEA propylene glycol monomethyl ether Acetate
- ethyl ethoxypropionate 2-heptanone
- ⁇ -butyrolactone cyclohexanone
- the mixing ratio (mass) of the solvent containing a hydroxyl group and the solvent not containing a hydroxyl group is 1/99 to 99/1, preferably 10/90 to 90/10, more preferably 20/80 to 60/40. .
- a mixed solvent containing 50% by mass or more of a solvent not containing a hydroxyl group is particularly preferred from the viewpoint of coating uniformity.
- the solvent preferably contains propylene glycol monomethyl ether acetate, and is preferably a propylene glycol monomethyl ether acetate single solvent or a mixed solvent of two or more containing propylene glycol monomethyl ether acetate.
- composition of the present invention may or may not contain a carboxylic acid onium salt.
- carboxylic acid onium salts include those described in US Patent Application Publication No. 2008/0187860 [0605] to [0606].
- carboxylic acid onium salts can be synthesized by reacting sulfonium hydroxide, iodonium hydroxide, ammonium hydroxide and carboxylic acid with silver oxide in a suitable solvent.
- the content thereof is generally 0.1 to 20% by mass, preferably 0.5 to 10% by mass, based on the total solid content of the composition. More preferably, it is 1 to 7% by mass.
- the composition of the present invention may further include an acid proliferator, a dye, a plasticizer, a photosensitizer, a light absorber, an alkali-soluble resin, a dissolution inhibitor, and a compound that promotes solubility in a developer (for example, a phenol compound having a molecular weight of 1000 or less, an alicyclic compound having a carboxyl group, or an aliphatic compound) can be contained.
- Such a phenol compound having a molecular weight of 1000 or less can be obtained by referring to, for example, the methods described in JP-A-4-1222938, JP-A-2-28531, US Pat. No. 4,916,210, European Patent 219294, etc. It can be easily synthesized by those skilled in the art.
- alicyclic or aliphatic compounds having a carboxyl group include carboxylic acid derivatives having a steroid structure such as cholic acid, deoxycholic acid, lithocholic acid, adamantane carboxylic acid derivatives, adamantane dicarboxylic acid, cyclohexane carboxylic acid, cyclohexane Examples thereof include, but are not limited to, dicarboxylic acids.
- the composition of the present invention is preferably a resist film having a thickness of 80 nm or less from the viewpoint of improving resolution.
- a film thickness can be obtained by setting the solid content concentration in the composition to an appropriate range to give an appropriate viscosity and improving the coating property and film forming property.
- the solid content concentration of the composition of the present invention is usually 1.0 to 10% by mass, preferably 2.0 to 5.7% by mass, and more preferably 2.0 to 5.3% by mass.
- the resist solution can be uniformly applied on the substrate, and further, a resist pattern having excellent line width roughness can be formed.
- the reason for this is not clear, but perhaps the solid content concentration is 10% by mass or less, preferably 5.7% by mass or less, which suppresses aggregation of the material in the resist solution, particularly the photoacid generator. As a result, it is considered that a uniform resist film was formed.
- the solid content concentration is a mass percentage of the mass of other resist components excluding the solvent with respect to the total mass of the composition.
- the above components are dissolved in a predetermined organic solvent, preferably the above mixed solvent, filtered, and then applied onto a predetermined substrate.
- the pore size of the filter used for filter filtration is preferably 0.1 ⁇ m or less, more preferably 0.05 ⁇ m or less, and still more preferably 0.03 ⁇ m or less made of polytetrafluoroethylene, polyethylene, or nylon.
- filter filtration for example, as in JP-A-2002-62667, circulation filtration may be performed, or filtration may be performed by connecting a plurality of types of filters in series or in parallel.
- the composition may be filtered multiple times. Furthermore, you may perform a deaeration process etc. with respect to a composition before and behind filter filtration.
- the composition of the present invention relates to an actinic ray-sensitive or radiation-sensitive resin composition whose properties change upon irradiation with actinic rays or radiation. More specifically, the present invention relates to semiconductor manufacturing processes such as ICs, circuit boards such as liquid crystals and thermal heads, production of imprint mold structures, and other photofabrication processes, lithographic printing plates, acid-curing properties. The present invention relates to an actinic ray-sensitive or radiation-sensitive resin composition used in the composition.
- the pattern forming method of the present invention includes at least the following steps (a) to (c).
- step (A) a step of forming an actinic ray-sensitive or radiation-sensitive film (hereinafter also simply referred to as a film) on the substrate using the composition of the present invention; And (c) a step of developing the exposed actinic ray-sensitive or radiation-sensitive film using a developer to form a pattern (development step).
- the exposure in the step (ii) may be immersion exposure.
- the pattern forming method of the present invention preferably includes (i) a heating step after (b) the exposure step.
- the pattern forming method of the present invention may include (a) an exposure step a plurality of times.
- the pattern forming method of the present invention may include (d) a heating step a plurality of times.
- a step of forming an actinic ray-sensitive or radiation-sensitive film on a substrate using the composition of the present invention, a step of exposing the actinic-ray-sensitive or radiation-sensitive film, and a developing step can be performed by a generally known method.
- the substrate on which the actinic ray-sensitive or radiation-sensitive film is formed is not particularly limited, and silicon, SiN, inorganic substrates such as SiO 2 and SiN, coated inorganic substrates such as SOG, etc.
- substrates generally used in semiconductor manufacturing processes, circuit board manufacturing processes such as liquid crystals and thermal heads, and other photofabrication lithography processes can be used.
- an antireflection film may be formed between the resist film and the substrate.
- the antireflection film a known organic or inorganic antireflection film can be appropriately used.
- PB preheating step
- PEB post-exposure heating step
- the heating temperature is preferably 70 to 130 ° C. for both PB and PEB, more preferably 80 to 120 ° C.
- the heating time is preferably 30 to 300 seconds, more preferably 30 to 180 seconds, and even more preferably 30 to 90 seconds.
- the heating can be performed by means provided in a normal exposure / developing machine, and may be performed using a hot plate or the like.
- Baking accelerates the reaction of the exposed area and improves the sensitivity and pattern profile.
- Infrared light, visible light, ultraviolet light, far ultraviolet light, extreme ultraviolet light, X-rays, an electron beam, etc. can be mentioned, Preferably it is 250 nm or less.
- KrF excimer laser 248 nm
- ArF excimer laser (193 nm)
- F 2 excimer laser 157 nm
- X-ray EUV
- EUV 13 nm
- electron beam etc.
- KrF excimer laser, ArF excimer laser, EUV or electron beam are preferable, and ArF excimer laser is more preferable.
- the immersion exposure method can be applied in the step of performing exposure according to the present invention.
- the immersion exposure method can be combined with a super-resolution technique such as a phase shift method or a modified illumination method.
- a step of washing the surface of the membrane with an aqueous chemical may be performed.
- the immersion liquid is preferably a liquid that is transparent to the exposure wavelength and has a refractive index temperature coefficient as small as possible so as to minimize distortion of the optical image projected onto the film.
- an ArF excimer laser (wavelength: 193 nm)
- an additive liquid that reduces the surface tension of water and increases the surface activity may be added in a small proportion.
- This additive is preferably one that does not dissolve the resist film on the wafer and can ignore the influence on the optical coating on the lower surface of the lens element.
- an aliphatic alcohol having a refractive index substantially equal to that of water is preferable, and specific examples include methyl alcohol, ethyl alcohol, isopropyl alcohol, and the like.
- distilled water is preferable as the water to be used because it causes distortion of the optical image projected on the resist when an opaque material or impurities whose refractive index is significantly different from that of water are mixed with 193 nm light. Further, pure water filtered through an ion exchange filter or the like may be used.
- the electrical resistance of water used as the immersion liquid is preferably 18.3 M ⁇ cm or more, the TOC (organic substance concentration) is preferably 20 ppb or less, and deaeration treatment is preferably performed.
- an additive that increases the refractive index may be added to water, or heavy water (D 2 O) may be used instead of water.
- the receding contact angle of the resist film formed using the composition of the present invention is 70 ° or more at a temperature of 23 ⁇ 3 ° C. and a humidity of 45 ⁇ 5%, which is suitable for exposure through an immersion medium. It is preferably at least 0 °, more preferably from 75 to 85 °.
- the receding contact angle is too small, it cannot be used suitably for exposure through an immersion medium, and the effect of reducing water residue (watermark) defects cannot be sufficiently exhibited.
- the hydrophobic resin in the composition.
- an immersion liquid hardly soluble film hereinafter also referred to as “top coat” formed of the above-described hydrophobic resin may be provided on the upper layer of the resist film.
- the functions necessary for the top coat are suitability for application to the upper layer portion of the resist film and poor solubility of the immersion liquid. It is preferable that the top coat is not mixed with the composition film and can be uniformly applied to the upper layer of the composition film.
- the top coat examples include hydrocarbon polymers, acrylic acid ester polymers, polymethacrylic acid, polyacrylic acid, polyvinyl ether, silicon-containing polymers, fluorine-containing polymers, and the like. From the viewpoint of contaminating the optical lens when impurities are eluted from the top coat into the immersion liquid, it is preferable that the residual monomer component of the polymer contained in the top coat is small.
- a developer When removing the topcoat, a developer may be used, or a separate release agent may be used.
- a release agent a solvent having low penetration into the film is preferable.
- the peeling step can be performed simultaneously with the film development step, it is preferable that the peeling can be performed with a developer containing an organic solvent.
- the resolution is improved when there is no difference in refractive index between the top coat and the immersion liquid.
- the topcoat is preferably close to the refractive index of the immersion liquid. From the viewpoint of making the refractive index close to the immersion liquid, it is preferable to have fluorine atoms in the topcoat. A thin film is more preferable from the viewpoint of transparency and refractive index.
- the top coat is not mixed with the film and further not mixed with the immersion liquid.
- the solvent used for the topcoat is a poorly water-soluble and water-insoluble medium in the solvent used for the composition of the present invention.
- the topcoat may be water-soluble or water-insoluble.
- the formation of the top coat layer is not limited to immersion exposure, and may be performed in the case of dry exposure (exposure not involving immersion liquid). By forming the topcoat layer, for example, generation of outgas can be suppressed.
- top coat composition used for forming the top coat layer will be described.
- the solvent is preferably an organic solvent. More preferred is an alcohol solvent.
- the solvent is an organic solvent, it is preferably a solvent that does not dissolve the actinic ray-sensitive or radiation-sensitive film.
- a solvent that can be used an alcohol solvent, a fluorine solvent, or a hydrocarbon solvent is preferably used, and a non-fluorine alcohol solvent is more preferably used.
- a primary alcohol is preferable from the viewpoint of applicability, and a primary alcohol having 4 to 8 carbon atoms is more preferable.
- a linear, branched, or cyclic alcohol can be used, and preferably, for example, 1-butanol, 1-hexanol, 1-pentanol and 3-methyl- Examples include 1-butanol, 2-ethylbutanol, and perfluorobutyltetrahydrofuran.
- resins having an acidic group described in JP-A-2009-134177 and JP-A-2009-91798 can be preferably used.
- the weight average molecular weight of the water-soluble resin is not particularly limited, but is preferably 2,000 to 1,000,000, more preferably 5,000 to 500,000, and particularly preferably 10,000 to 100,000.
- the weight average molecular weight of the resin indicates a molecular weight in terms of polystyrene measured by GPC (carrier: THF or N-methyl-2-pyrrolidone (NMP)).
- the pH of the top coat composition is not particularly limited, but is preferably 0 to 10, more preferably 0 to 8, and particularly preferably 1 to 7.
- the concentration of the resin in the top coat composition is preferably 0.1 to 10% by mass, more preferably 0.2 to 5% by mass, and particularly preferably 0.3 to 3% by mass.
- the topcoat material may contain components other than the resin, but the ratio of the resin to the solid content of the topcoat composition is preferably 80 to 100% by mass, more preferably 90 to 100% by mass, and particularly preferably Is from 95 to 100% by weight.
- the solid content concentration of the top coat composition in the present invention is preferably 0.1 to 10, more preferably 0.2 to 6% by mass, and further preferably 0.3 to 5% by mass. preferable. By setting the solid content concentration within the above range, the topcoat composition can be uniformly applied onto the resist film.
- an actinic ray-sensitive or radiation-sensitive film can be formed on the substrate using the composition, and a topcoat layer can be formed on the film using the topcoat composition.
- the film thickness of the actinic ray-sensitive or radiation-sensitive film is preferably 10 to 100 nm, and the film thickness of the topcoat layer is preferably 10 to 200 nm, more preferably 20 to 100 nm, and particularly preferably 40 to 80 nm. It is.
- spin coating is preferable, and the rotation speed is preferably 1000 to 3000 rpm.
- the composition is applied on a substrate (eg, silicon / silicon dioxide coating) used for manufacturing a precision integrated circuit element by an appropriate application method such as a spinner or a coater, and dried to form a resist film.
- a substrate eg, silicon / silicon dioxide coating
- a known antireflection film can be applied in advance.
- a topcoat composition is applied and dried by the same means as the method for forming an actinic-ray-sensitive or radiation-sensitive film, and a topcoat layer is formed. can do.
- the actinic ray-sensitive or radiation-sensitive film having a topcoat layer as an upper layer is usually irradiated with actinic rays or radiation through a mask, preferably baked (heated) and developed. Thereby, a good pattern can be obtained.
- the immersion head In the immersion exposure process, the immersion head needs to move on the wafer following the movement of the exposure head to scan the wafer at high speed to form the exposure pattern.
- the contact angle of the immersion liquid with respect to the actinic ray-sensitive or radiation-sensitive film is important, and the resist is required to follow the high-speed scanning of the exposure head without remaining droplets.
- the developer used in the step of developing the actinic ray-sensitive or radiation-sensitive composition film formed using the composition of the present invention is not particularly limited.
- an alkali developer or a developer containing an organic solvent is used.
- an organic developer can be used.
- a developer containing an organic solvent is preferably used.
- alkali developer examples include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, and aqueous ammonia, primary amines such as ethylamine and n-propylamine, diethylamine, Secondary amines such as di-n-butylamine, tertiary amines such as triethylamine and methyldiethylamine, alcohol amines such as dimethylethanolamine and triethanolamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium Hydroxide, tetrabutylammonium hydroxide, tetrapentylammonium hydroxide, tetrahexylammonium hydroxide, tetraoctylammonium hydroxide, ethyl Tetraalkylammonium hydroxide such as limethylammoni
- Alkaline aqueous solutions of quaternary ammonium salts, cyclic amines such as pyrrole and pihelidine can be used. Furthermore, an appropriate amount of alcohol or surfactant may be added to the alkaline aqueous solution.
- the alkali concentration of the alkali developer is usually from 0.1 to 20% by mass.
- the pH of the alkali developer is usually from 10.0 to 15.0. The alkali concentration and pH of the alkali developer can be appropriately adjusted and used.
- the alkali developer may be used after adding a surfactant or an organic solvent.
- pure water can be used as the rinsing liquid in the rinsing treatment performed after alkali development and an appropriate amount of a surfactant can be added.
- a polar solvent such as a ketone solvent, an ester solvent, an alcohol solvent, an amide solvent, an ether solvent, and a hydrocarbon solvent can be used. And the solvent described in paragraph [0507] of JP-A-218223.
- a plurality of the above solvents may be mixed, or may be used by mixing with a solvent other than the above or water.
- the water content of the developer as a whole is preferably less than 10% by mass, and more preferably substantially free of moisture.
- the amount of the organic solvent used relative to the organic developer is preferably 90% by mass to 100% by mass, and preferably 95% by mass to 100% by mass with respect to the total amount of the developer.
- the organic developer is preferably a developer containing at least one organic solvent selected from the group consisting of ketone solvents, ester solvents, alcohol solvents, amide solvents and ether solvents. .
- the vapor pressure of the organic developer is preferably 5 kPa or less, more preferably 3 kPa or less, and particularly preferably 2 kPa or less at 20 ° C.
- the vapor pressure of the organic developer is preferably 5 kPa or less, more preferably 3 kPa or less, and particularly preferably 2 kPa or less at 20 ° C.
- An appropriate amount of a surfactant can be added to the organic developer as necessary.
- the surfactant is not particularly limited, and for example, an ionic or nonionic fluorine-based and / or silicon-based surfactant can be used.
- fluorine and / or silicon surfactants include, for example, JP-A No. 62-36663, JP-A No. 61-226746, JP-A No. 61-226745, JP-A No. 62-170950, JP-A-63-34540, JP-A-7-230165, JP-A-8-62834, JP-A-9-54432, JP-A-9-5988, US Pat. No. 5,405,720, The surfactants described in US Pat. Nos.
- the amount of the surfactant used is usually 0.001 to 5% by mass, preferably 0.005 to 2% by mass, and more preferably 0.01 to 0.5% by mass with respect to the total amount of the developer.
- the organic developer may contain a basic compound.
- Specific examples and preferred examples of the basic compound that can be contained in the organic developer used in the present invention are the same as those in the basic compound that can be contained in the composition described above as the acid diffusion controller (D).
- a developing method for example, a method in which a substrate is immersed in a tank filled with a developer for a certain period of time (dip method), a method in which the developer is raised on the surface of the substrate by surface tension and is left stationary for a certain time (paddle) Method), a method of spraying the developer on the substrate surface (spray method), a method of continuously discharging the developer while scanning the developer discharge nozzle on the substrate rotating at a constant speed (dynamic dispensing method) Etc.
- dip method a method in which a substrate is immersed in a tank filled with a developer for a certain period of time
- paddle a method in which the developer is raised on the surface of the substrate by surface tension and is left stationary for a certain time
- spray method a method of spraying the developer on the substrate surface
- the discharge pressure of the discharged developer (the flow rate per unit area of the discharged developer) is Preferably it is 2 mL / sec / mm 2 or less, More preferably, it is 1.5 mL / sec / mm 2 or less, More preferably, it is 1 mL / sec / mm 2 or less.
- the flow rate is no particular lower limit on the flow rate, but 0.2 mL / sec / mm 2 or more is preferable in consideration of throughput.
- the developer discharge pressure (mL / sec / mm 2 ) is a value at the developing nozzle outlet in the developing device.
- Examples of the method for adjusting the discharge pressure of the developer include a method of adjusting the discharge pressure with a pump or the like, and a method of changing the pressure by adjusting the pressure by supply from a pressurized tank.
- a step of stopping development may be performed while substituting with another solvent.
- a step of developing using a developer containing an organic solvent (organic solvent developing step) and a step of developing using an alkaline aqueous solution (alkali developing step) are used in combination. Also good. Thereby, a finer pattern can be formed.
- a portion with low exposure intensity is removed by the organic solvent development step, but a portion with high exposure strength is also removed by further performing the alkali development step.
- a pattern can be formed without dissolving only the intermediate exposure intensity region, so that a finer pattern than usual can be formed (Japanese Patent Laid-Open No. 2008-292975 [0077]. ] And the same mechanism).
- the order of the alkali development step and the organic solvent development step is not particularly limited.
- the alkali development may be performed before the organic solvent development step, and the organic solvent development may be performed before the alkali development step.
- a step of washing with a rinsing solution is included after the step of developing with a developer containing an organic solvent.
- the rinsing solution used in the rinsing step after the step of developing with a developer containing an organic solvent is not particularly limited as long as the resist pattern is not dissolved, and a solution containing a general organic solvent can be used.
- a rinsing liquid containing at least one organic solvent selected from the group consisting of hydrocarbon solvents, ketone solvents, ester solvents, alcohol solvents, amide solvents and ether solvents should be used. Is preferred.
- hydrocarbon solvent ketone solvent, ester solvent, alcohol solvent, amide solvent and ether solvent
- hydrocarbon solvent ketone solvent, ester solvent, alcohol solvent, amide solvent and ether solvent
- it contains at least one organic solvent selected from the group consisting of ketone solvents, ester solvents, alcohol solvents, and amide solvents after the step of developing using a developer containing an organic solvent.
- a step of washing with a rinsing liquid is performed, more preferably, a step of washing with a rinsing liquid containing an alcohol solvent or an ester solvent is carried out, and particularly preferably, a rinsing liquid containing a monohydric alcohol is used. And, most preferably, the step of cleaning with a rinse solution containing a monohydric alcohol having 5 or more carbon atoms is performed.
- examples of the monohydric alcohol used in the rinsing step include linear, branched, and cyclic monohydric alcohols. Specific examples include 1-butanol, 2-butanol, and 3-methyl-1-butanol. Tert-butyl alcohol, 1-pentanol, 2-pentanol, 1-hexanol, 4-methyl-2-pentanol, 1-heptanol, 1-octanol, 2-hexanol, cyclopentanol, 2-heptanol, 2 -Octanol, 3-hexanol, 3-heptanol, 3-octanol, 4-octanol and the like can be used, and particularly preferable monohydric alcohols having 5 or more carbon atoms are 1-hexanol, 2-hexanol, 4-methyl- Use 2-pentanol, 1-pentanol, 3-methyl-1-butanol, etc. Can.
- a plurality of each component may be mixed, or may be used by mixing with an organic solvent other than the above.
- the water content in the rinse liquid is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 3% by mass or less. By setting the water content to 10% by mass or less, good development characteristics can be obtained.
- the vapor pressure of the rinsing solution used after the step of developing with a developer containing an organic solvent is preferably 0.05 kPa or more and 5 kPa or less, more preferably 0.1 kPa or more and 5 kPa or less at 20 ° C. 12 kPa or more and 3 kPa or less are the most preferable.
- An appropriate amount of a surfactant can be added to the rinse solution.
- the wafer that has been developed using the developer containing the organic solvent is cleaned using the rinse solution containing the organic solvent.
- the cleaning method is not particularly limited. For example, a method of continuing to discharge the rinse liquid onto the substrate rotating at a constant speed (rotary coating method), or immersing the substrate in a tank filled with the rinse liquid for a certain period of time. A method (dip method), a method of spraying a rinsing liquid onto the substrate surface (spray method), etc. can be applied.
- a cleaning process is performed by a spin coating method, and after cleaning, the substrate is rotated at a speed of 2000 rpm to 4000 rpm. It is preferable to rotate and remove the rinse liquid from the substrate.
- the developing solution and the rinsing solution remaining between the patterns and inside the patterns are removed by baking.
- the heating step after the rinsing step is usually performed at 40 to 160 ° C., preferably 70 to 95 ° C., usually 10 seconds to 3 minutes, preferably 30 seconds to 90 seconds.
- the pattern forming method of the present invention can also be used for guide pattern formation in DSA (Directed Self-Assembly) (see, for example, ACS Nano Vol. 4 No. 8, Pages 4815-4823).
- DSA Directed Self-Assembly
- the resist pattern formed by the pattern forming method of the present invention can be used as a core material (core) of a spacer process disclosed in, for example, Japanese Patent Application Laid-Open Nos. 3-270227 and 2013-164509.
- the present invention also relates to an electronic device manufacturing method including the above-described pattern forming method of the present invention, and an electronic device manufactured by this manufacturing method.
- the electronic device of the present invention is suitably mounted on electrical and electronic equipment (home appliances, OA / media related equipment, optical equipment, communication equipment, etc.).
- the composition ratio measured by 13 C-NMR was 40/50/10.
- ⁇ Resist preparation> The components shown in Table 3 below are dissolved in a solvent, and a solution with a solid content of 4% by mass is prepared for each, and this is filtered through a polyethylene filter having a pore size of 0.05 ⁇ m. A functional resin composition was prepared. The actinic ray-sensitive or radiation-sensitive resin composition was evaluated by the following method, and the results are shown in Table 3. About each component in Table 1, the ratio at the time of using multiple is a mass ratio.
- ⁇ Pattern formation method> An organic antireflection film ARC29SR (manufactured by Nissan Chemical Industries, Ltd.) was applied onto the silicon wafer and baked at 205 ° C. for 60 seconds to form an antireflection film having a thickness of 95 nm.
- An actinic ray-sensitive or radiation-sensitive resin composition was applied thereon and baked (PB: Prebake) at 100 ° C. for 60 seconds to form a resist film having a thickness of 100 nm.
- the obtained wafer was used with an ArF excimer laser immersion scanner (manufactured by ASML; XT1700i, NA 1.20, C-Quad, outer sigma 0.900, inner sigma 0.812, XY deflection) 1: Exposure was through a 6% halftone mask with a one line and space pattern. Ultra pure water was used as the immersion liquid. Then, it heated at 105 degreeC for 60 second (PEB: Post Exposure Bake). Next, the film was developed by paddle with a developer containing an organic solvent for 30 seconds, and rinsed by paddle with a rinse solution [methyl isobutyl carbinol (MIBC)] for 30 seconds.
- MIBC methyl isobutyl carbinol
- Example 16 As a developer containing an organic solvent, methyl amyl ketone was used in Example 16, and butyl acetate was used in Examples and Comparative Examples other than Example 16. Subsequently, the wafer was rotated at a rotational speed of 4000 rpm for 30 seconds to form a 1: 1 line and space pattern with a line width of 48 nm.
- Table 2 shows the composition ratio (molar ratio; corresponding in order from the left), weight average molecular weight (Mw), and dispersity (Mw / Mn) of each repeating unit. These were calculated
- hydrophobic resin As the hydrophobic resin, the following resins were used.
- Table 5 shows the composition ratio (molar ratio; corresponding in order from the left), weight average molecular weight (Mw), and dispersity (Mw / Mn) of each repeating unit. These were calculated
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Abstract
Description
[1] 樹脂(A)、及び、活性光線又は放射線の照射により酸を発生する光酸発生剤(B)を含有する感活性光線性又は感放射線性樹脂組成物であり、光酸発生剤(B)として、下記一般式(1)で表される光酸発生剤(B1)と、光酸発生剤(B1)とは異なる光酸発生剤(B2)を少なくとも含有する感活性光線性又は感放射線性樹脂組成物。
R1、R2及びR3は、それぞれ独立に、ハロゲン原子、アルキル基、シクロアルキル基、アルコキシ基、アルキルカルボニルオキシ基、アルキルオキシカルボニル基、アルキルチオ基、シクロアルキルカルボニルオキシ基、シクロアルキルオキシカルボニル基、又はシクロアルキルチオ基を表す。
l、m及びnは、それぞれ独立に0~3の整数を表し、l+m+nは1以上である。lが2以上のとき、複数のR1は互いに同一でも異なっていてもよく、少なくとも2つのR1は互いに結合して環を形成してもよい。mが2以上のとき、複数のR2は互いに同一でも異なっていてもよく、少なくとも2つのR2は互いに結合して環を形成してもよい。nが2以上のとき、複数のR3は互いに同一でも異なっていてもよく、少なくとも2つのR3は互いに結合して環を形成してもよい。
Z1 -は非求核性アニオンを表す。
R1は、アルキル基、シクロアルキル基、アルコキシ基、シクロアルコキシ基、アリール基又はアルケニル基を表す。
R2及びR3は、それぞれ独立に、水素原子、アルキル基、シクロアルキル基又はアリール基を表し、R2とR3が互いに連結して環を形成してもよい。
R1とR2は、互いに連結して環を形成してもよい。
RX及びRyは、各々独立に、アルキル基、シクロアルキル基、アルケニル基、アリール基、2-オキソアルキル基、2-オキソシクロアルキル基、アルコキシカルボニルアルキル基、アルコキシカルボニルシクロアルキル基を表す。RXとRyが互いに連結して環を形成してもよく、この環構造は酸素原子、窒素原子、硫黄原子、ケトン基、エーテル結合、エステル結合、アミド結合を含んでいてもよい。
Z-は、非求核性アニオンを表す。
R13は、水素原子、フッ素原子、水酸基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、又はシクロアルキル基を有する基を表す。
R14は複数存在する場合は各々独立して、水酸基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、アルキルカルボニル基、アルキルスルホニル基、シクロアルキルスルホニル基、又はシクロアルキル基を有する基を表す。
R15は各々独立して、アルキル基、シクロアルキル基又はナフチル基を表す。2個のR15は互いに結合して式中の硫黄原子と共に環を形成してもよく、環を構成する原子として、式中の硫黄原子以外に更にヘテロ原子を含んでも良い。
lは0~2の整数を表す。
rは0~8の整数を表す。
Z-は、非求核性アニオンを表す。
Xfは、各々独立に、フッ素原子、又は少なくとも一つのフッ素原子で置換されたアルキル基を表す。
R16及びR17は、各々独立に、水素原子、フッ素原子、アルキル基、又は、少なくとも一つのフッ素原子で置換されたアルキル基を表し、複数存在する場合のR16、R17は、それぞれ同一でも異なっていてもよい。
Lは、二価の連結基を表し、複数存在する場合のLは同一でも異なっていてもよい。
Wは、環状構造を含む有機基を表す。
oは、1~20の整数を表す。pは、0~10の整数を表す。qは、0~10の整数を表す。
Xfは、各々独立に、フッ素原子、又は少なくとも一つのフッ素原子で置換されたアルキル基を表す。
R16及びR17は、各々独立に、水素原子、フッ素原子、アルキル基、又は、少なくとも一つのフッ素原子で置換されたアルキル基を表し、複数存在する場合のR16、R17は、それぞれ同一でも異なっていてもよい。
Lは、二価の連結基を表し、複数存在する場合のLは同一でも異なっていてもよい。
Wは、環状構造を含む有機基を表す。
oは、1~20の整数を表す。pは、0~10の整数を表す。qは、0~10の整数を表す。
前記感活性光線性又は感放射線性膜を露光する工程、及び
露光した前記感活性光線性又は感放射線性膜を現像する工程を含むパターン形成方法。
[11] 現像工程において使用される現像液が有機溶剤を含有する現像液である請求項9又は10のいずれか1項に記載のパターン形成方法。
[13] [12]に記載の電子デバイスの製造方法により製造された電子デバイス。
本明細書における基(原子団)の表記において、置換及び無置換を記していない表記は、置換基を有さないものと共に置換基を有するものをも包含するものである。例えば、「アルキル基」とは、置換基を有さないアルキル基(無置換アルキル基)のみならず、置換基を有するアルキル基(置換アルキル基)をも包含するものである。
また、本明細書において、(メタ)アクリレートはアクリレート及びメタクリレートを表し、(メタ)アクリルはアクリル及びメタクリルを表す。
以下、本発明の感活性光線性又は感放射線性樹脂組成物(以下、「本発明の組成物」ともいう)に含有される樹脂(A)、活性光線又は放射線の照射により酸を発生する光酸発生剤(B)、並びに、含有されてもよい任意成分について説明する。
本発明の感活性光線性又は感放射線性樹脂組成物は、ArF露光用であることが好ましく、ArF液浸露光用であることがより好ましい。
本発明の組成物は、活性光線又は放射線の照射により酸を発生する光酸発生剤(B)(以下、「光酸発生剤」又は「化合物(B)」ともいう)として、以下に示す一般式(1)で表される光酸発生剤(B1)と、光酸発生剤(B1)とは異なる光酸発生剤(B2)を少なくとも含有する。
R1、R2、R3は、それぞれ独立に、ハロゲン原子、アルキル基、シクロアルキル基、アルコキシ基、アルキルカルボニルオキシ基、アルキルオキシカルボニル基又はアルキルチオ基、シクロアルキルカルボニルオキシ基、シクロアルキルオキシカルボニル基、又はシクロアルキルチオ基を表す。
Z1 -は非求核性アニオンを表す。
R1、R2及びR3としてのハロゲン原子は、例えば、フッ素原子、塩素原子、臭素原子が挙げられる。
Xfは、各々独立に、フッ素原子、又は少なくとも一つのフッ素原子で置換されたアルキル基を表す。
Xfは、上記の通り、フッ素原子、又は少なくとも1つのフッ素原子で置換されたアルキル基であり、フッ素原子で置換されたアルキル基におけるアルキル基としては、炭素数1~10のアルキル基が好ましく、炭素数1~4のアルキル基がより好ましい。また、Xfのフッ素原子で置換されたアルキル基は、パーフルオロアルキル基であることが好ましい。
光酸発生剤(B2)は、上述の通り、光酸発生剤(B1)と異なる光酸発生剤である。本発明の一形態において、光酸発生剤(B2)は、一般式(1)で表される光酸発生剤(B1)と異なるカチオン構造を有するイオン性化合物であることが好ましい。また、他の態様において、光酸発生剤(B2)は、一般式(1)で表される光酸発生剤(B1)とカチオン構造が異なり、アニオン構造が同一のイオン性化合物であることが更に好ましい。
R1は、アルキル基、シクロアルキル基、アルコキシ基、シクロアルコキシ基、アリール基又はアルケニル基を表す。これらの基は置換基を有してもよい。
R1とR2は、互いに連結して環を形成してもよい。
RX及びRyは、各々独立に、アルキル基、シクロアルキル基、アルケニル基、アリール基、2-オキソアルキル基、2-オキソシクロアルキル基、アルコキシカルボニルアルキル基、アルコキシカルボニルシクロアルキル基を表す。これらの基は置換基を有してもよい。RXとRyが互いに連結して環を形成してもよく、この環構造は酸素原子、窒素原子、硫黄原子、ケトン基、エーテル結合、エステル結合、アミド結合を含んでいてもよい。
Z-は、非求核性アニオンを表す。
R1としてのアルキル基は、好ましくは炭素数1~20の直鎖又は分岐アルキル基であり、アルキル鎖中に酸素原子、硫黄原子、窒素原子を有していてもよい。具体的にはメチル基、エチル基、n-プロピル基、n-ブチル基、n-ペンチル基、n-ヘキシル基、n-オクチル基、n-ドデシル基、n-テトラデシル基、n-オクタデシル基などの直鎖アルキル基、イソプロピル基、イソブチル基、t-ブチル基、ネオペンチル基、2-エチルヘキシル基などの分岐アルキル基を挙げることができる。R1のアルキル基は置換基を有していてもよく、置換基を有するアルキル基としては、シアノメチル基、2,2,2-トリフルオロエチル基、メトキシカルボニルメチル基、エトキシカルボニルメチル基等が挙げられる。
R13は、水素原子、フッ素原子、水酸基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、又はシクロアルキル基を有する基を表す。これらの基は置換基を有してもよい。
rは0~8の整数を表す。
Z-は、非求核性アニオンを表す。
一般式(ZI-4)において、R13、R14及びR15のアルキル基としては、直鎖状若しくは分岐状であり、炭素原子数1~10のものが好ましい。
本発明の組成物に含有される樹脂(A)は、典型的には、酸の作用によって分解し、極性が増大する樹脂であり、酸の作用によりアルカリ現像液に対する溶解性が増大し、又は、酸の作用により有機溶剤を主成分とする現像液に対する溶解性が減少する樹脂であることが好ましく、樹脂の主鎖又は側鎖、又は、主鎖及び側鎖の両方に、酸の作用により分解し、アルカリ可溶性基を生じる基(以下、「酸分解性基」ともいう)を有することが好ましい。
Xa1は、水素原子、置換基を有していてもよいアルキル基を表す。
R31は、水素原子又はアルキル基を表す。
R1及びR3は、各々独立して、水素原子、置換基を有していてもよいメチル基又は-CH2-R11で表される基を表す。R11は1価の有機基を表す。
Aは、エステル結合(-COO-で表される基)又はアミド結合(-CONH-で表される基)を表す。
R7、A、R0、Z、及びnは、上記一般式(III)と同義である。
R2c~R4cは、各々独立に、水素原子、水酸基又はシアノ基を表す。ただし、R2c~R4cの内の少なくとも1つは、水酸基又はシアノ基を表す。好ましくは、R2c~R4cの内の1つ又は2つが、水酸基で、残りが水素原子である。一般式(VIIa)に於いて、更に好ましくは、R2c~R4cの内の2つが、水酸基で、残りが水素原子である。
R1cは、水素原子、メチル基、トリフロロメチル基又はヒドロキシメチル基を表す。
R13’~R16’は、それぞれ独立に、水素原子、ハロゲン原子、シアノ基、ヒドロキシル基、カルボキシル基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、アルキルカルボニル基、ラクトン構造を有する基、又は酸分解性基を有する基を表す。
nは、0~2の整数を表す。
R50~R55は、それぞれ独立に、水素原子、フッ素原子又はアルキル基を表す。但し、R50~R55の内、少なくとも1つは、フッ素原子又は少なくとも1つの水素原子がフッ素原子で置換されたアルキル基を表す。
また、樹脂(A)は、1種で使用してもよいし、複数併用してもよい。
本発明の組成物は、疎水性樹脂を含有してもよい。なお、疎水性樹脂は樹脂(A)とは異なることが好ましい。
R57~R68は、各々独立に、水素原子、フッ素原子又はアルキル基(直鎖若しくは分岐)を表す。但し、R57~R61の少なくとも1つ、R62~R64の少なくとも1つ、及びR65~R68の少なくとも1つは、各々独立に、フッ素原子又は少なくとも1つの水素原子がフッ素原子で置換されたアルキル基(好ましくは炭素数1~4)を表す。
R11~R14は、各々独立に、側鎖部分を表す。
以下、一般式(II)で表される繰り返し単位について詳細に説明する。
(y)ラクトン構造を有する基、酸無水物基、又は酸イミド基、
(z)酸の作用により分解する基
酸基(x)としては、フェノール性水酸基、カルボン酸基、フッ素化アルコール基、スルホン酸基、スルホンアミド基、スルホニルイミド基、(アルキルスルホニル)(アルキルカルボニル)メチレン基、(アルキルスルホニル)(アルキルカルボニル)イミド基、ビス(アルキルカルボニル)メチレン基、ビス(アルキルカルボニル)イミド基、ビス(アルキルスルホニル)メチレン基、ビス(アルキルスルホニル)イミド基、トリス(アルキルカルボニル)メチレン基、トリス(アルキルスルホニル)メチレン基等が挙げられる。
Rc31は、水素原子、アルキル基(フッ素原子等で置換されていてもよい)、シアノ基又は-CH2-O-Rac2基を表す。式中、Rac2は、水素原子、アルキル基又はアシル基を表す。Rc31は、水素原子、メチル基、ヒドロキシメチル基、トリフルオロメチル基が好ましく、水素原子、メチル基が特に好ましい。
Rc11’及びRc12’は、各々独立に、水素原子、シアノ基、ハロゲン原子又はアルキル基を表す。
疎水性樹脂の組成物中の含有量は、本発明の組成物中の全固形分に対し、0.01~10質量%が好ましく、0.05~8質量%がより好ましく、0.1~7質量%が更に好ましい。
本発明の組成物は、酸拡散制御剤(D)を含有することが好ましい。酸拡散制御剤(D)は、露光時に酸発生剤等から発生する酸をトラップし、余分な発生酸による、未露光部における酸分解性樹脂の反応を抑制するクエンチャーとして作用するものである。酸拡散制御剤(D)としては、窒素原子を有する塩基性化合物、窒素原子を有し、酸の作用により脱離する基を有する低分子化合物、活性光線又は放射線の照射により塩基性が低下又は消失する塩基性化合物、又は、酸発生剤に対して相対的に弱酸となるオニウム塩を使用することができる。
R200、R201及びR202は、同一でも異なってもよく、水素原子、アルキル基(好ましくは炭素数1~20)、シクロアルキル基(好ましくは炭素数3~20)又はアリール基(炭素数6~20)を表し、ここで、R201とR202は、互いに結合して環を形成してもよい。
Rbは、各々独立に、水素原子、アルキル基(好ましくは炭素数1~10)、シクロアルキル基(好ましくは炭素数3~30)、アリール基(好ましくは炭素数3~30)、アラルキル基(好ましくは炭素数1~10)、又はアルコキシアルキル基(好ましくは炭素数1~10)を表す。Rbは相互に連結して環を形成していてもよい。
Qは、-SO3H、-CO2H、又は-W1NHW2Rfを表す。ここで、Rfは、アルキル基(好ましくは炭素数1~20)、シクロアルキル基(好ましくは炭素数3~20)又はアリール基(好ましくは炭素数6~30)を表し、W1及びW2は、各々独立に、-SO2-又は-CO-を表す。
R1、R2、R3は、炭素数1以上の置換基を表す。
本発明の組成物は、通常、溶剤を含有する。
本発明の組成物は、カルボン酸オニウム塩を含有してもしなくてもよい。このようなカルボン酸オニウム塩は、米国特許出願公開2008/0187860号明細書[0605]~[0606]に記載のものを挙げることができる。
次に、本発明のパターン形成方法について説明する。
上記工程(イ)における露光は、液浸露光であってもよい。
三口フラスコにジフェニルスルホキシドを8.5g(42mmol)加え、五酸化りん-メタンスルホン酸溶液(質量比1:10)40gに溶解させ、アニソール5g(46mmol)を反応液中に滴下ロートを用い室温で滴下した。滴下中は、内温が30℃以下になるように調整した。更に、内温50℃で3時間攪拌した後、氷水200gを入れた三口フラスコに反応液を添加し室温で10分攪拌した。続いて塩化メチレン100gを添加した後に、B1―5’ 8.5g(20mmol)を加え室温で1時間攪拌した。有機層を分離し、水200gを用いて洗浄し、濃縮後シリカゲルクロマトグラフィー(展開溶媒:酢酸エチル:メタノール=90:10)で精製し、目的の化合物B1-5を10.5g(17mmol)得た。
シクロヘキサノン 102.3質量部を窒素気流下、80℃に加熱した。この液を攪拌しながら、下記構造式M-1で表されるモノマー 22.2質量部、下記構造式M-2で表されるモノマー 22.8質量部、下記構造式M-3で表されるモノマー 6.6質量部、シクロヘキサノン 189.9質量部、2,2’-アゾビスイソ酪酸ジメチル〔V-601、和光純薬工業(株)製〕2.40質量部の混合溶液を5時間かけて滴下した。滴下終了後、80℃で更に2時間攪拌した。反応液を放冷後、多量のヘキサン/酢酸エチル(質量比9:1)で再沈殿、ろ過し、得られた固体を真空乾燥することで、酸分解性樹脂(1)を41.1質量部得た。
後掲の表3に示す成分を溶剤に溶解させ、それぞれについて固形分濃度4質量%の溶液を調製し、これを0.05μmのポアサイズを有するポリエチレンフィルターで濾過して感活性光線性又は感放射線性樹脂組成物を調製した。感活性光線性又は感放射線性樹脂組成物を下記の方法で評価し、結果を表3に示した。
表1における各成分について、複数使用した場合の比は質量比である。
シリコンウエハ上に有機反射防止膜ARC29SR(日産化学社製)を塗布し、205℃で60秒間ベークを行い、膜厚95nmの反射防止膜を形成した。その上に感活性光線性又は感放射線性樹脂組成物を塗布し、100℃で60秒間に亘ってベーク(PB:Prebake)を行い、膜厚100nmのレジスト膜を形成した。
上記<パターン形成方法>の露光・現像条件において線幅50nmのラインパターンを形成する露光量において、フォーカス方向に10nm刻みで、露光フォーカスの条件を変更して露光及び現像を行い、得られる各パターンのスペース線幅(CD)を線幅測長走査型電子顕微鏡SEM((株)日立製作所S-9380)を使用して測定し、上記の各CDをプロットして得られる曲線の極小値又は極大値に対応するフォーカスをベストフォーカスとした。このベストフォーカスを中心にフォーカスを変化させた際に、ライン幅が50nm±10%を許容するフォーカスの変動幅、すなわち、フォーカス許容度(nm)を算出した。フォーカス許容度の値は大きいほど好ましい。
上記<パターン形成方法>で得られたライン/スペース=1/1のラインパターン(線幅48nm)について線幅測長走査型電子顕微鏡SEM((株)日立製作所S-9380)で観察し、ラインパターンの長手方向のエッジ2μmの範囲について、線幅を50ポイント測定し、その測定ばらつきについて標準偏差を求め、3σを算出した。値が小さいほど良好な性能であることを示す。
活性光線又は放射線の照射により塩基性が低下又は消失する塩基性化合物、あるいは、窒素原子を含有する塩基性化合物として、以下の化合物を用いた。
W-1:メガファックF176(DIC(株)製)(フッ素系)
W-2:メガファックR08(DIC(株)製)(フッ素及びシリコン系)
W-3:PF6320(OMNOVA Solutions Inc.製)(フッ素系)
W-4:トロイゾルS-366(トロイケミカル(株)製)
〔溶剤〕
A1:プロピレングリコールモノメチルエーテルアセテート(PGMEA)
A2:シクロヘキサノン
A3:γ―ブチロラクトン
B1:プロピレングリコールモノメチルエーテル(PGME)
B2:乳酸エチル
Claims (12)
- 樹脂(A)、及び、活性光線又は放射線の照射により酸を発生する光酸発生剤(B)を含有する感活性光線性又は感放射線性樹脂組成物であり、光酸発生剤(B)として、下記一般式(1)で表される光酸発生剤(B1)と、光酸発生剤(B1)とは異なる光酸発生剤(B2)を少なくとも含有する感活性光線性又は感放射線性樹脂組成物。
一般式(1)中、
R1、R2及びR3は、それぞれ独立に、ハロゲン原子、アルキル基、シクロアルキル基、アルコキシ基、アルキルカルボニルオキシ基、アルキルオキシカルボニル基、アルキルチオ基、シクロアルキルカルボニルオキシ基、シクロアルキルオキシカルボニル基、又はシクロアルキルチオ基を表す。
l、m及びnは、それぞれ独立に0~3の整数を表し、l+m+nは1以上である。lが2以上のとき、複数のR1は互いに同一でも異なっていてもよく、少なくとも2つのR1は互いに結合して環を形成してもよい。mが2以上のとき、複数のR2は互いに同一でも異なっていてもよく、少なくとも2つのR2は互いに結合して環を形成してもよい。nが2以上のとき、複数のR3は互いに同一でも異なっていてもよく、少なくとも2つのR3は互いに結合して環を形成してもよい。
Z1 -は非求核性アニオンを表す。 - 光酸発生剤(B2)が、下記一般式(ZI-3)又は下記一般式(ZI-4)で表される化合物である請求項1に記載の感活性光線性又は感放射線性樹脂組成物。
一般式(ZI-3)中、
R1は、アルキル基、シクロアルキル基、アルコキシ基、シクロアルコキシ基、アリール基又はアルケニル基を表す。
R2及びR3は、それぞれ独立に、水素原子、アルキル基、シクロアルキル基又はアリール基を表し、R2とR3が互いに連結して環を形成してもよい。
R1とR2は、互いに連結して環を形成してもよい。
RX及びRyは、各々独立に、アルキル基、シクロアルキル基、アルケニル基、アリール基、2-オキソアルキル基、2-オキソシクロアルキル基、アルコキシカルボニルアルキル基、アルコキシカルボニルシクロアルキル基を表す。RXとRyが互いに連結して環を形成してもよく、この環構造は酸素原子、窒素原子、硫黄原子、ケトン基、エーテル結合、エステル結合、アミド結合を含んでいてもよい。
Z-は、非求核性アニオンを表す。
一般式(ZI-4)中、
R13は、水素原子、フッ素原子、水酸基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、又はシクロアルキル基を有する基を表す。
R14は複数存在する場合は各々独立して、水酸基、アルキル基、シクロアルキル基、アルコキシ基、アルコキシカルボニル基、アルキルカルボニル基、アルキルスルホニル基、シクロアルキルスルホニル基、又はシクロアルキル基を有する基を表す。
R15は各々独立して、アルキル基、シクロアルキル基又はナフチル基を表す。2個のR15は互いに結合して式中の硫黄原子と共に環を形成してもよく、環を構成する原子として、式中の硫黄原子以外に更にヘテロ原子を含んでもよい。
lは0~2の整数を表す。
rは0~8の整数を表す。
Z-は、非求核性アニオンを表す。 - 一般式(ZI-3)におけるZ-、又は一般式(ZI-4)におけるZ-が、下記一般式(2)で表される非求核性アニオンである請求項2に記載の感活性光線性又は感放射線性樹脂組成物。
一般式(2)中
Xfは、各々独立に、フッ素原子、又は少なくとも一つのフッ素原子で置換されたアルキル基を表す。
R16及びR17は、各々独立に、水素原子、フッ素原子、アルキル基、又は、少なくとも一つのフッ素原子で置換されたアルキル基を表し、複数存在する場合のR16、R17は、それぞれ同一でも異なっていてもよい。
Lは、二価の連結基を表し、複数存在する場合のLは同一でも異なっていてもよい。
Wは、環状構造を含む有機基を表す。
oは、1~20の整数を表す。pは、0~10の整数を表す。qは、0~10の整数を表す。 - 一般式(1)におけるZ1 -が下記一般式(2)で表される非求核性アニオンである請求項1に記載の感活性光線性又は感放射線性樹脂組成物。
一般式(2)中
Xfは、各々独立に、フッ素原子、又は少なくとも一つのフッ素原子で置換されたアルキル基を表す。
R16及びR17は、各々独立に、水素原子、フッ素原子、アルキル基、又は、少なくとも一つのフッ素原子で置換されたアルキル基を表し、複数存在する場合のR16、R17は、それぞれ同一でも異なっていてもよい。
Lは、二価の連結基を表し、複数存在する場合のLは同一でも異なっていてもよい。
Wは、環状構造を含む有機基を表す。
oは、1~20の整数を表す。pは、0~10の整数を表す。qは、0~10の整数を表す。 - 光酸発生剤(B)の含有率が、組成物中の全固形分を基準として10質量%以上である請求項1に記載の感活性光線性又は感放射線性樹脂組成物。
- 樹脂(A)が、酸の作用により分解して極性が増大する樹脂である請求項1に記載の感活性光線性又は感放射線性樹脂組成物。
- 更に、窒素原子を有する塩基性化合物又は、活性光線又は放射線の照射により塩基性が低下又は消失する塩基性化合物を含有する、請求項1に記載の感活性光線性又は感放射線性樹脂組成物。
- 請求項1に記載の感活性光線性又は感放射線性樹脂組成物を用いて形成された感活性光線性又は感放射線性膜。
- 請求項1に記載の感活性光線性又は感放射線性樹脂組成物を用いて感活性光線性又は感放射線性膜を形成する工程、
前記感活性光線性又は感放射線性膜を露光する工程、及び
露光した前記感活性光線性又は感放射線性膜を現像する工程を含むパターン形成方法。 - 露光工程が液浸露光である請求項9に記載のパターン形成方法。
- 現像工程において使用される現像液が有機溶剤を含有する現像液である請求項9に記載のパターン形成方法。
- 請求項9に記載のパターン形成方法を含む、電子デバイスの製造方法。
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| KR1020167028946A KR101882716B1 (ko) | 2014-04-14 | 2015-04-10 | 감활성광선성 또는 감방사선성 수지 조성물, 그 조성물을 이용한 감활성광선성 또는 감방사선성막 및 패턴 형성 방법, 또한 전자 디바이스의 제조 방법 및 전자 디바이스 |
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| US20210088905A1 (en) * | 2018-08-29 | 2021-03-25 | Fujifilm Corporation | Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device |
| US12216404B2 (en) * | 2018-08-29 | 2025-02-04 | Fujifilm Corporation | Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device |
| WO2022172685A1 (ja) * | 2021-02-12 | 2022-08-18 | Jsr株式会社 | 感放射線性樹脂組成物及びそれを用いたレジストパターンの形成方法、並びに、スルホニウム塩化合物及びそれを含む感放射線性酸発生剤 |
| JPWO2022172685A1 (ja) * | 2021-02-12 | 2022-08-18 | ||
| WO2023095563A1 (ja) * | 2021-11-25 | 2023-06-01 | Jsr株式会社 | 感放射線性樹脂組成物及びパターン形成方法 |
| JPWO2023095561A1 (ja) * | 2021-11-25 | 2023-06-01 | ||
| JPWO2023095563A1 (ja) * | 2021-11-25 | 2023-06-01 | ||
| JP7807727B2 (ja) | 2021-11-25 | 2026-01-28 | Jsr株式会社 | 感放射線性樹脂組成物及びパターン形成方法 |
| JP7808264B2 (ja) | 2021-11-25 | 2026-01-29 | Jsr株式会社 | 感放射線性樹脂組成物及びパターン形成方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20170038685A1 (en) | 2017-02-09 |
| JPWO2015159830A1 (ja) | 2017-04-13 |
| KR101882716B1 (ko) | 2018-07-27 |
| TWI599843B (zh) | 2017-09-21 |
| US10261417B2 (en) | 2019-04-16 |
| JP6461919B2 (ja) | 2019-01-30 |
| KR20160135124A (ko) | 2016-11-24 |
| TW201543156A (zh) | 2015-11-16 |
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