WO2005100412A1 - 高分子化合物、該高分子化合物を含有するフォトレジスト組成物、およびレジストパターン形成方法 - Google Patents
高分子化合物、該高分子化合物を含有するフォトレジスト組成物、およびレジストパターン形成方法 Download PDFInfo
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- WO2005100412A1 WO2005100412A1 PCT/JP2005/006657 JP2005006657W WO2005100412A1 WO 2005100412 A1 WO2005100412 A1 WO 2005100412A1 JP 2005006657 W JP2005006657 W JP 2005006657W WO 2005100412 A1 WO2005100412 A1 WO 2005100412A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/20—Esters of polyhydric alcohols or polyhydric phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/283—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing one or more carboxylic moiety in the chain, e.g. acetoacetoxyethyl(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F232/00—Copolymers of cyclic compounds containing no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system
- C08F232/08—Copolymers of cyclic compounds containing no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system having condensed rings
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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
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
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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
- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
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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
- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
- G03F7/0397—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition the macromolecular compound having an alicyclic moiety in a side chain
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
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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
- G03F7/004—Photosensitive materials
- G03F7/0046—Photosensitive materials with perfluoro compounds, e.g. for dry lithography
Definitions
- the present invention relates to a polymer compound, a photoresist composition containing the polymer compound, and a method for forming a resist pattern, which are used for patterning a semiconductor integrated circuit by lithography.
- Light source below 300nm, especially KrF, ArF, F
- the main spectral power of the mercury lamp is S436 nm
- the g-line power is about 0.5 to 0.30 m.
- 248 nm KrF excimer laser light is used, and at about 0.15 ⁇ m or less, 193 nm ArF excimer laser light is used, and at 157 nm for further miniaturization.
- Resists for short-wavelength light sources such as KrF excimer lasers and ArF excimer lasers, have high resolution that can reproduce patterns with fine dimensions and high sensitivity to such short-wavelength light sources. It has been demanded.
- a chemically amplified positive resist composition containing a base resin whose alkali solubility increases by the action of an acid and an acid generator that generates an acid upon exposure is known. ing.
- a chemically amplified positive resist composition which has been proposed as a resist material suitable for a method of exposing using a KrF excimer laser generally has, as a base resin, partially dissociate a part of the hydroxyl groups of a polyhydroxystyrene resin as an acid-dissociable compound.
- Those protected with a dissolution inhibiting group are used (for example, see Patent Document 1).
- the acid dissociable, dissolution inhibiting group include so-called acetal groups such as a chain ether group represented by 1-ethoxyethyl group or a cyclic ether group represented by tetrahydrovinyl group, tert-butyl group, and 2-alkyl group.
- Tertiary alkyl groups such as 2-adamantyl and tertiary alkyl represented by tert butoxycarbonyl group Coxycarbol groups are mainly used!
- a chemically amplified positive resist composition proposed as a resist material suitable for a method of exposing using an ArF excimer laser is generally used as a base resin as one of the hydroxyl groups of a (meth) acrylic resin.
- the moieties protected with an acid dissociable, dissolution inhibiting group as described above are used.
- resins using a tertiary alkyl group as an acid dissociable, dissolution inhibiting group are widely used (for example, see Patent Document 2).
- an acetal group and a tert-butyl group are used as an acid-dissociable protecting group for a fluorinated alcohol.
- Such tertiary alkyl groups, tert-butoxycarbol groups, tert-butoxycarbolmethyl groups and the like are known.
- Patent Document 1 Japanese Patent Application Laid-Open No. 4-212258
- Patent Document 2 Japanese Patent No. 2881969
- Non-Patent Document 3 T. Hagiwara, S. Irie, T. Itani, Y. Kawaguchi, O. Yokokoji, S
- Patent Document 4 F. Houlihan, A. Romano, D. Rentkiewicz, R. Sakamuri, R.
- Non-Patent Document 5 Y. Kawaguchi, J. Irie, S. Kodama, S. Okada, Y. Takebe, I.
- the present invention has been made in view of the above, and has excellent resolution, and satisfactorily resolves a resist pattern even when an acid generator having a low strength of generated acid is used.
- Compound capable of constituting a positive resist composition which can be produced, a compound suitable for producing the polymer compound, a positive resist composition containing the polymer compound, and a positive resist An object of the present invention is to provide a method for forming a resist pattern using the composition.
- the present invention has been made in view of the above, and includes a polymer compound having a novel acid dissociable, dissolution inhibiting group having excellent resolution and shape of a resist pattern, and includes the polymer compound. And a method for forming a resist pattern.
- the present inventors have introduced various acid-dissociable, dissolution-inhibiting groups as protecting groups for an alkali-soluble group of a polymer compound for a photoresist composition to solve the above-mentioned problems.
- a fine pattern with improved resolution of the resist pattern was formed when a polyfunctional acid-dissociable, dissolution-inhibiting group represented by a specific general formula was used. They have found for the first time what they can do, and have completed the present invention based on this finding.
- a first aspect (aspect) of the present invention relates to a polymer compound whose alkali solubility can be changed by the action of an acid
- A represents an organic group having 1 to 20 carbon atoms and having a valence of at least 1 and n represents an integer of 1 to 4
- an acid dissociable, dissolution inhibiting group (ii) represents an organic group having 1 to 20 carbon atoms and having a valence of at least 1 and n represents an integer of 1 to 4
- the alkali-soluble group (i) is preferably an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group.
- the carbon atom adjacent to the carbon atom bonded to the alcoholic hydroxyl group is more preferably an alcoholic hydroxyl group having at least one fluorine atom.
- A is preferably a hydrocarbon group having 1 to 20 carbon atoms and having a valence of at least n + 1 and having a linear or cyclic structural force.
- a second aspect of the present invention is a polymer according to the first aspect, which is a kind of the polymer compound of the first aspect and comprises a structural unit (al) represented by the following general formula (51). It is a molecular compound.
- RR 2 independently represents a hydrogen atom or a methyl group; s represents an integer of 1 to 4; A represents an organic group having 1 to 20 carbon atoms and a valence of (s + 1)] . ]
- a third aspect of the present invention is a compound that can be used as a raw material for synthesizing the polymer compound of the second aspect, and is a compound represented by the following general formula (41). [0018] [Formula 3]
- R 2 each independently represents a hydrogen atom or a methyl group; n represents an integer of 1 to 4; A represents a (n + 1) -valent hydrocarbon group having 1 to 20 carbon atoms. ]
- a fourth aspect of the present invention is characterized by containing (A) the polymer compound of the first or second aspect, and (B) an acid generator component that generates an acid upon exposure. It is a positive resist composition.
- the positive resist composition of the fourth aspect is coated on a substrate, pre-betaed, selectively exposed, subjected to PEB (heating after exposure), and subjected to alkali development.
- the "structural unit” means a monomer unit (monomer unit) constituting the polymer compound.
- exposure is a concept including radiation irradiation in general.
- a positive resist composition having excellent resolution and capable of favorably resolving a resist pattern even by using an acid generator having a low strength of generated acid can be obtained.
- a molecular compound, a compound suitable for producing the polymer compound, a positive resist composition containing the polymer compound, and a method for forming a resist pattern using the positive resist composition are obtained.
- the thickness of the resist pattern can be prevented from being reduced.
- the hydrogen atom of the hydroxyl group of the alkali-soluble group (i) in the molecule is represented by the following general formula (1)
- A represents an organic group having 1 to 20 carbon atoms and a valence of 1 or more, and n represents an integer of 1 to 4.
- An acid dissociable, dissolution inhibiting group (ii) represented by It is characterized by being protected.
- the polymer compound of the present invention When the polymer compound of the present invention is used in a system for positive resist of amplification type, the polymer compound has a polyfunctional acid dissociable, dissolution inhibiting group represented by the above general formula (1). Before exposure, the compound exhibits an action of inhibiting dissolution in alkali development, and after exposure and PEB process, exhibits alkali solubility due to deprotection of the acid dissociable, dissolution inhibiting group, and has a large alkali solubility before and after exposure. Since it changes, a fine pattern with high resolution can be provided. In addition, film loss of the resist pattern can be prevented.
- a polyfunctional acid dissociable, dissolution inhibiting group represented by the above general formula (1). Before exposure, the compound exhibits an action of inhibiting dissolution in alkali development, and after exposure and PEB process, exhibits alkali solubility due to deprotection of the acid dissociable, dissolution inhibiting group, and has a large alkali solubility before and after exposure. Since
- the alkali-soluble group (i) is preferably an alcoholic hydroxyl group, a phenolic hydroxyl group, or a carboxyl group, and at least one carbon atom adjacent to the carbon atom bound to the alcoholic hydroxyl group! More preferably, it is an alcoholic hydroxyl group having two fluorine atoms.
- A is preferably a hydrocarbon group having 1 to 20 carbon atoms and having a valence of at least n + 1 and having a linear or cyclic structural force.
- polyfunctional means, as shown in the general formula (1), that a plurality of organic groups A having O CH— bonded to at least a part of the bonds have a multivalent bond.
- A is a divalent or higher organic group, and O CH— is bonded to two of the two or more bonds coming out of A.
- A is n + 1 or more valent organic group
- O CH— is present in each of the n + 1 or more bonds among the n + 1 or more bonds from A
- A is preferably an n + 1 monovalent organic group.
- O CH— is bonded to all the bonds of A.
- n + 1 is divalent to pentavalent
- the acid dissociable, dissolution inhibiting group (ii) can be represented by the following general formulas (2) to (5), respectively. • ⁇ CH 2 — O—— A—— O— CH 2
- the acid-dissociable, dissolution-inhibiting group (ii) has at least one alkali-soluble group (i) selected from the group consisting of alcoholic hydroxyl groups, phenolic hydroxyl groups, and carboxyl groups. It is bonded to the oxygen atom of the molecular compound except for the hydrogen atom of the alkali-soluble group (i).
- the alkali-soluble group (i) to which the acid dissociable, dissolution inhibiting group (ii) is bonded may be in the polymer compound that is the same molecule or in the polymer compound that is a different molecule. Good. Among them, it is preferable that they are in the same polymer compound that is the same molecule.
- A represents an organic group, for example, a linear, branched, or cyclic saturated aliphatic or unsaturated aliphatic hydrocarbon group having 1 to 20 carbon atoms. No. Among them, a linear, branched, or cyclic saturated or unsaturated aliphatic hydrocarbon group having 1 to 16 carbon atoms, and more preferably 1 to 12 carbon atoms, is preferable because of easy industrial production.
- Examples of the chain or branched hydrocarbon group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, an n-pentyl group, a cyclopentyl group, and a methylcyclopentyl group.
- ethylcyclopentyl group n-hexyl group, cyclohexyl group, methylcyclohexyl group, ethylcyclohexyl group, heptyl group, octyl group, nor Examples thereof include a group in which one or more hydrogen atoms have been removed from a group, a decanyl group, a dodecanyl group, and the like.
- a methylene group or an n-propylene group which is preferably an alkylene group having 1 to 5 carbon atoms, is most preferable.
- cyclic hydrocarbon groups include cycloalkanes, bicycloalkanes, bicycloalkenes, tricycloalkanes, teracycloalkanes, methylbicycloalkanes, methylbicycloalkenes, methyltricycloalkanes, Examples thereof include groups obtained by removing two or more hydrogen atoms from methyltelloracycloalkane, ethylbicycloalkane, ethylbicycloalkene, ethyltricycloalkane, ethyltetracycloalkane, and the like.
- two or more polycycloalkanes such as cyclohexane, cyclopentane, adamantane, norbornane, norbornane, methyl norbornane, ethyl norbornane, methyl norbornene, ethyl norbornene, isobornane, tricyclodecane, tetracyclododecane, etc.
- a group excluding a hydrogen atom can be used by appropriately selecting a medium number of those proposed in the ArF resist.
- a group obtained by removing two hydrogen atoms from cyclohexane which is preferably a cycloalkyl group, is most preferable.
- the alkali-soluble site (i) in the polymer compound of the present invention is, as exemplified in the aforementioned non-patent document, the KrF resist, the ArF resist, and the F Known from resist.
- Such an alkali-soluble site is alcoholic water
- Examples thereof include an acid group, a phenolic hydroxyl group, and a carboxyl group, and are not particularly limited. In the present invention, it is preferably at least one selected from an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group. Among them, alcoholic hydroxyl groups or fluorine-containing alcoholic hydroxyl groups are preferred because of their high transparency and moderate alkali solubility.
- the alcoholic hydroxyl group may be simply a hydroxyl group, an alkyloxy group having a hydroxy group, an alkyloxy group containing an alcoholic hydroxyl group such as an alkyloxyalkyl group or an alkyl group, or a hydroxyl group containing an alcoholic hydroxyl group.
- An alkyloxy group or an alkyl group containing an alcoholic hydroxyl group may be used.
- the archi Examples of the alkoxy group, the alkyloxyalkyl group or the alkyl group include a lower alkyloxy group, a lower alkyloxy lower alkyl group, and a lower alkyl group.
- the number of carbon atoms represented by the above “lower” is preferably 1 to 5.
- the lower alkyloxy group include a methyloxy group, an ethyloxy group, a propyloxy group, and a butyloxy group.
- Specific examples of the lower alkyloxy lower alkyl group include a methyloxymethyl group.
- a lower alkyl group such as a methyl group, an ethyl group, a propyl group and a butyl group.
- the alcoholic hydroxyl group-containing alkyloxy group the alcoholic hydroxyl group-containing alkyloxyalkyl group or the alcoholic hydroxyl group-containing alkyl group, one of the alkyloxy group, the alkyloxyalkyl group, or a hydrogen atom of the alkyl group is included. Part or all of which may be substituted with a fluorine atom.
- Examples of the alcoholic hydroxyl group-containing fluoroalkyloxyalkyl group include (HO) C (CF) CHO—CH— and (HO) C (CF) CHCHO—CH—
- alcohol group examples include a hydroxyl group-containing fluoroalkyl group such as a (HO) C (CF) CH— group and a 2-bis (trifluoromethyl) -2-hydroxy-ethyl group.
- a hydroxyl group-containing fluoroalkyl group such as a (HO) C (CF) CH— group and a 2-bis (trifluoromethyl) -2-hydroxy-ethyl group.
- the phenolic hydroxyl group is, for example, Novo because it is inexpensive and easily available. Examples include phenolic hydroxyl groups contained in racks, resins, polyhydroxystyrenes, and the like. Of these, phenolic hydroxyl groups of polyhydroxystyrene are preferred because they have excellent resolution and are suitable for fine patterns. /.
- Examples of the carboxyl group include a carboxy group of an ethylenically unsaturated carboxylic acid.
- Examples of the ethylenically unsaturated carboxylic acid include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and fumaric acid. Of these, acrylic acid and methacrylic acid are preferred because they are inexpensive and readily available.
- the polystyrene equivalent mass average molecular weight of the polymer compound of the present invention by gel permeation chromatography is not particularly limited, but is 5,000 to 150,000, and more preferably 40,000 to 130,000.
- the degree of dispersion (MwZMn) is about 1.0 to 5.0, preferably 2.5 or less.
- the polymer compound of the present invention can also constitute at least one or two or more unit forces selected from the above-mentioned monomer units having an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group. It may further contain a unit of a conventionally known polymer compound for a photoresist composition, or may be used by mixing with such a polymer.
- the polymer compound having an alkali-soluble group (i) as a precursor of the polymer compound of the present invention includes, for example, alcoholic hydroxyl groups represented by the following chemical formulas (6) to (14).
- chemical formula (6) and chemical formula (13) are preferred because they are industrially easily available.
- the hydroxyl group of the alkali-soluble group (i) in the polymer compound of the present invention has 5 to 50%, preferably 8 to 40%, protected by an acid dissociable, dissolution inhibiting group (ii)! It is also preferable to have the viewpoint of resolution and film reduction.
- the acid dissociable, dissolution inhibiting group represented by the general formula (1) in the polymer compound of the present invention is at least one alkali-soluble group selected from the group consisting of an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group.
- These low molecular weight compounds are characterized in that the alkali-soluble group (i) in the molecule is protected by the acid dissociable, dissolution inhibiting group (ii) represented by the general formula (1). .
- the low molecular weight compound for a photoresist composition When used in a chemically amplified positive resist system as an acid dissociation inhibitor (C), it exhibits a dissolution inhibiting effect in alkali development before exposure, and shows the effect of exposure and PEB processes. Later, the alkali solubility due to deprotection is exhibited, and the alkali solubility before and after the exposure significantly changes, so that a fine pattern with high resolution can be provided. In addition, film loss of the resist pattern can be prevented. Further, the adhesiveness of the resist pattern to the substrate is improved by the effect of the hydrophilic group of the low-molecular compound, and the development defects can be reduced by the improvement of the affinity to the alkali developing solution.
- C acid dissociation inhibitor
- the alkali-soluble group (i) is preferably an alcoholic hydroxyl group, a phenolic hydroxyl group, or a carboxyl group, and at least one carbon atom adjacent to the carbon atom bound to the alcoholic hydroxyl group! Characterized by having two fluorine atoms More preferably, it is an alcoholic hydroxyl group.
- A is preferably a hydrocarbon group having 1 to 20 carbon atoms and a valence of at least n, which also has a chain or cyclic structural force.
- OCH— is bonded to n + 1 of the n + 1 or more bonds
- A is preferably an n + 1 monovalent organic group.
- O CH— is bonded to all the bonds of A.
- n + 1 is divalent to pentavalent
- the acid dissociable, dissolution inhibiting group (ii) can be represented by the above general formulas (2) to (5), similarly to the case of the above-described polymer compound.
- the acid dissociable, dissolution inhibiting group (ii) is selected from the group consisting of alcoholic hydroxyl groups, phenolic hydroxyl groups, and carboxyl groups. It is bonded to the oxygen atom of the molecular compound except for the hydrogen atom of the alkali-soluble group (i).
- the alkali-soluble group (i) to which the acid dissociable, dissolution inhibiting group (ii) binds may be present in the low molecular compound being the same molecule or in the low molecular compound being a different molecule. Good. Especially, it is preferable that the compound is present in the low-molecular compound having the same molecule.
- A represents an organic group, for example, a linear, branched, or cyclic saturated aliphatic or unsaturated aliphatic hydrocarbon group having 1 to 20 carbon atoms. No. Among them, a linear, branched, or cyclic saturated or unsaturated aliphatic hydrocarbon group having 1 to 16 carbon atoms, and more preferably 1 to 12 carbon atoms, is preferable because of easy industrial production.
- Examples of the chain or branched hydrocarbon group include a methyl group, an ethyl group, an npropyl group, an isopropyl group, an nbutyl group, an isobutyl group, an npentyl group, a cyclopentyl group, a methylcyclopentyl group, and a methylcyclopentyl group.
- a methylene group or an n-propylene group which is preferably an alkylene group having 1 to 5 carbon atoms, is most preferable.
- cyclic hydrocarbon group examples include cycloalkane, bicycloalkane, bicycloalkene, tricycloalkane, teracycloalkane, methylbicycloalkane, methylbicycloalkene, methyltricycloalkane, Examples thereof include groups in which two or more hydrogen atoms have been removed from methyltelloracycloalkane, ethylcycloalkane, ethylcyclocycloalkene, ethyltricycloalkane, ethylethylcycloalkane, and the like.
- two or more polycycloalkanes such as cyclohexane, cyclopentane, adamantane, norbornane, norbornane, methyl norbornane, ethyl norbornane, methyl norbornene, ethyl norbornene, isobornane, tricyclodecane, tetracyclododecane, etc.
- a group excluding a hydrogen atom can be appropriately selected and used in the ArF resist, as proposed in the ArF list.
- a group obtained by removing two hydrogen atoms from cyclohexane which is preferably a cycloalkyl group, is most preferable.
- the alkali-soluble site (i) in the low molecular weight compound for a photoresist composition is known from KrF resist, ArF resist, and F resist that have been proposed so far. like that
- the alkali-soluble site includes, for example, an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group, and is not particularly limited.
- the low molecular compound for a photoresist composition is at least one selected from the group consisting of an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group. Among them, a carbon atom adjacent to a carbon atom bonded to an alcoholic hydroxyl group, and an alcoholic hydroxyl group characterized by having at least one fluorine atom are more preferable.
- the low-molecular compound for a photoresist composition includes, for example, at least one carbon atom adjacent to a carbon atom bonded to an alcoholic hydroxyl group represented by the following chemical formulas (17) and (18).
- a compound having an alcoholic hydroxyl group characterized by having two fluorine atoms, a compound having a phenolic hydroxyl group described later, and a compound having a force described later Compounds having a ropoxyl group can be mentioned.
- a polyvalent phenol compound which is known as a sensitizer / a heat resistance improver in a non-chemically amplified g-line or i-line resist can be used.
- Examples of such polyvalent phenolic conjugates include the following.
- Examples of the compound having a carboxyl group include bile acids such as cholic acid and lithocholic acid which are known as a dissolution inhibitor precursor of a chemically amplified resist.
- the polymer compound having a specific acid dissociable, dissolution inhibiting group and the low molecular compound for a photoresist composition of the present invention can be synthesized by a known method or a method described in the above-mentioned non-patent document.
- the high molecular compound and the low molecular compound for a photoresist composition of the present invention are obtained by using an alcohol conjugate as a starting material, synthesizing this chloromethyl ether compound to form an acid dissociable, dissolution inhibiting group precursor, It can be synthesized and reacted with a low molecular weight compound or a high molecular weight compound having an alkali-soluble group to obtain an intended product.
- a chloromethyl ether conjugate is used as a starting material, and is obtained by reacting with a high molecular compound and a low molecular compound each having any one of the substituents selected from an alcohol hydroxyl group, a phenolic hydroxyl group, and a carboxyl group.
- the chloromethyl ether conjugate can be synthesized by the method shown in the following reaction formula. That is, paraformaldehyde is added to an alcohol compound, 2.0 to 3.0 equivalents of hydrogen chloride gas are blown into the alcohol compound, and the mixture is reacted under acidic conditions of hydrochloric acid at 40 to 100 ° C. After completion of the reaction, the product is distilled under reduced pressure to obtain the desired chloromethyl ether conjugate.
- the chloromethyl ether compound obtained as described above is converted into at least one alcohol such as an alcoholic hydroxyl group, a phenolic hydroxyl group, and a carboxyl group.
- the compound is protected with the acid dissociable, dissolution inhibiting group (ii) represented by the above general formula (1), and the present invention provides A molecular compound and a low molecular compound for a photoresist composition can be obtained.
- the high molecular compounds of the present invention and the low molecular compounds for photoresist compositions are, for example, the halogenated compounds described above in the fluorinated alcohol-containing or alcohol-containing polymer. Can be obtained by reacting the methylated ether conjugate.
- a low molecular weight compound having an alcoholic hydroxyl group can be obtained by reacting the corresponding fluorinated alcohol-containing or alcohol-containing low molecular weight compound with the halogenated methyl ether conjugate.
- the high molecular compounds of the present invention and the low molecular compounds for photoresist compositions include, for example, polyhydroxystyrene resin (15) and the halogenated methyl ether. It can be obtained by reacting the danied product. Similarly, a low molecular compound having a phenolic hydroxyl group can be obtained by reacting the corresponding low molecular polyhydric phenol compound with the halogenated methyl ether conjugate.
- the polymer compound in which the hydroxyl group is protected is, for example, a compound in which the halogenated methyl ether compound is a compound such as acrylic acid or methacrylic acid.
- An unsaturated carboxylic acid ester obtained by reacting with a saturated carboxylic acid can be used as one monomer and polymerized with another monomer having a carboxyl group such as acrylic acid or methacrylic acid.
- the low molecular weight compound in which the hydroxyl group is protected can also be obtained by reacting the corresponding bile acid or the like with the halogenated methyl ether conjugate.
- the compound of the third aspect of the present invention (hereinafter, sometimes referred to as compound (a)) comprises a plurality ((n + 1)) of (meth) acrylic acid methyl esters It has a structure in which a methylene group formed by taking one hydrogen atom of a methyl group in an ester side chain is bonded to a hydrocarbon group A having 1 to 20 carbon atoms via an oxygen atom.
- (meth) acrylate means one or both of methacrylate and acrylate.
- R ⁇ R 2 each independently represent a hydrogen atom or a methyl group.
- n R 2 in the formula (41) each independently represent a hydrogen atom or a methyl group.
- n represents an integer of 1 to 4, preferably 1 or 2, and most preferably 1.
- A represents a (n + 1) -valent hydrocarbon group having 1 to 20 carbon atoms.
- the hydrocarbon group may be linear, branched, cyclic, or a combination thereof. Further, it may be a saturated hydrocarbon group having no unsaturated bond or an unsaturated hydrocarbon group having an unsaturated bond.
- a linear saturated hydrocarbon group having 1 to 4 carbon atoms is preferable from the viewpoint of industrial availability.
- the number of carbon atoms of the saturated hydrocarbon group is more preferably 1-3, and further preferably 2 or 3.
- the powerful saturated hydrocarbon group is, for example, an alkylene group when n is 1, and examples thereof include a methylene group, an ethylene group, an n-propylene group, and an n-butylene group.
- a hydrocarbon group having a cyclic group having 4 to 15 carbon atoms is preferable.
- the “hydrocarbon group having a cyclic group having 4 to 15 carbon atoms” is a hydrocarbon group having a cyclic group (cyclic hydrocarbon group) having 4 to 15 carbon atoms in the structure of the group. Yes, it may be composed of only a cyclic hydrocarbon group having 4 to 15 carbon atoms.
- a linear hydrocarbon group such as a methylene group or an ethylene group is bonded to the cyclic hydrocarbon group. It may be a group.
- the cyclic group preferably has 4 to 10 carbon atoms, and more preferably 4 to 8 carbon atoms.
- the hydrocarbon group having a cyclic group having 4 to 15 carbon atoms preferably has 4 to 20 carbon atoms, and more preferably 4 to 10 carbon atoms.
- the cyclic group having 4 to 15 carbon atoms may be an aliphatic cyclic group or an aromatic cyclic group. Further, it may be a monocyclic group or a polycyclic group.
- aliphatic is a relative concept with respect to aromatics, and is defined to mean a group, a compound, or the like having no aromaticity.
- aliphatic cyclic group (preferably alicyclic group) means a monocyclic group or a polycyclic group having no aromaticity.
- the cyclic group having 4 to 15 carbon atoms an aliphatic cyclic group is preferable in that the line edge roughness of the resist pattern ⁇ the rectangular shape of the cross-sectional shape is good.
- Examples of the aliphatic cyclic group having 4 to 15 carbon atoms include, for example, cycloalkane, bicycloalkane, bicycloalkene, tricycloalkane, teracycloalkane, methylbicycloalkane, methylbicycloalkene, methyltricycloalkane, methyltelloracycloalkane And ethyl bicycloalkane, ethyl bicycloalkene, ethyl tricycloalkane, ethyl tetracycloalkane, etc., in which two or more hydrogen atoms have been removed.
- two or more polycycloalkanes such as cyclohexane, cyclopentane, adamantane, norbornane, norbornane, methyl norbornane, ethyl norbornane, methyl norbornene, ethyl norbornene, isobornane, tricyclodecane, tetracyclododecane, etc.
- a group excluding a hydrogen atom A large number of such polycyclic groups have been proposed in the ArF list and can be appropriately selected and used.
- groups obtained by removing two or more hydrogen atoms from cyclic saturated hydrocarbons such as cyclohexane, cyclopentane, adamantane and norbornane (cyclic saturated hydrocarbon groups) are preferred in terms of resolution and the like.
- cyclic saturated hydrocarbon groups such as cyclohexane, cyclopentane, adamantane and norbornane
- a group obtained by removing two hydrogen atoms from cyclohexane is most preferable.
- Examples of the aromatic cyclic group having 4 to 15 carbon atoms include groups obtained by removing two or more hydrogen atoms from a ring such as naphthalene, anthracene, and phenanthrene.
- the compound (a) is particularly preferably a compound represented by the following general formula (42) or (43), from the viewpoint of excellent effects of the present invention.
- R 2 each independently represents a hydrogen atom or a methyl group; m is an integer of 1 to 3 Represents a number, preferably 2 or 3; X represents a cyclic saturated hydrocarbon group having 4 to 15, preferably 4 to 8 carbon atoms. ]
- the compound represented by the above general formula (42) or (43) more specifically includes, for example, a compound represented by the following general formula (44), (45) or (46) Can be
- R 2 each independently represents a hydrogen atom or a methyl group.
- the compound (a) according to the present invention can be synthesized by a known method.
- a and n are the same as described above, and Z represents a halogen atom (chlorine, bromine, etc.).
- Z represents a halogen atom (chlorine, bromine, etc.).
- the halogenated methyl ether conjugate can be synthesized, for example, by the method shown in the following reaction formula. Specifically, paraformaldehyde is added to the alcoholic conjugate represented by HO—A— [ ⁇ , and 2.0 to 3.0 equivalents of hydrogen halide gas are blown into the alcohol compound to give hydrochloric acid. React under acidic conditions at 40-100 ° C. After completion of the reaction, the product is distilled under reduced pressure to obtain the desired halogenated methyl ether conjugate. [0075] [Formula 13]
- the compound (a) of the present invention is suitably used for producing the following polymer compound of the present invention.
- polymer compound (A) includes a structural unit (al) represented by the above general formula (51). .
- R 2 has the same meaning as R 2 in the general formula (41).
- s has the same meaning as n in the general formula (41).
- A represents an (s + 1) -valent organic group.
- the organic group is not particularly limited, and may be, for example, a hydrocarbon group composed of a carbon atom (C) and a hydrogen atom (H) (such as a saturated or unsaturated aromatic or aliphatic hydrocarbon group such as an alkylene group or an arylene group).
- A is preferably an (n + 1) -valent hydrocarbon group having 1 to 20 carbon atoms because of the excellent effects of the present invention. That is, the structural unit (al) is preferably a structural unit (al-1) derived from the compound (a).
- the “structural unit derived from compound (a)” is a structural unit formed by cleavage of the ethylene double bond of compound (a).
- the proportion of the structural unit (al) is preferably 1 mol% or more based on the total of all the structural units constituting the polymer compound (A). More preferably, it is 3 to 30 mol%, more preferably 50 mol%. When the content is 1 mol% or more, the effects of the present invention can be sufficiently obtained. When the upper limit of the proportion of the structural unit (al) is 50 mol% or less, the solubility in an organic solvent is improved. In addition, the removability of the resist pattern is improved. Further, the fall of the resist pattern can be suppressed.
- the polymer compound (A) contains a structural unit (a2) derived from a mono (ex-lower alkyl) acrylate ester containing an acid dissociable, dissolution inhibiting group, in addition to the structural unit (al). Is preferred. Thereby, the resolution is further improved.
- mono-lower alkyl acrylate means having one (a-lower alkyl) acrylate residue represented by the following general formula.
- R represents a hydrogen atom or a lower alkyl group
- X is a monovalent organic group.
- ( ⁇ -lower alkyl) acrylate refers to lower alkylacryl such as methacrylate. Acid ester and / or acrylic ester.
- Example lower alkyl acrylate refers to the ⁇ -carbon atom of acrylate It means that a bonded hydrogen atom is substituted by a lower alkyl group.
- the ⁇ lower alkyl group '' of the lower alkyl acrylate is preferably a linear or branched alkyl group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, Examples include an n-butyl group, an isobutyl group, a tert-butyl group, a pentyl group, an isopentyl group, and a neopentyl group, and a methyl group is industrially preferable.
- “Structural unit derived from mono (a-lower alkyl) acrylate ester” means a structural unit formed by cleavage of an ethylenic double bond of mono (alower alkyl) acrylate ester.
- the acid dissociable, dissolution inhibiting group in the structural unit (a2) is not particularly limited! Generally, a compound that forms a cyclic or chain-like tertiary alkyl ester with the carboxyl group of mono ( ⁇ lower alkyl) acrylic acid is widely known. Excellent in dry etching resistance, resist pattern shape, etc. From the viewpoint, an acid dissociable, dissolution inhibiting group containing a monocyclic or polycyclic alicyclic group is preferably used. Further, it can be used after forming an alkoxymethyl ester having a carboxyl group of mono ( ⁇ -lower alkyl) acrylic acid and a cyclic or chain alkyl group.
- Examples of the monocyclic alicyclic group include groups in which one hydrogen atom has been removed from a monocycloalkane such as cyclohexane and cyclopentane.
- polycyclic alicyclic group examples include groups in which one or two hydrogen atoms have been removed from polycycloalkanes such as bicycloalkane, tricycloalkane, and tetracycloalkane, and specifically, adamantane. And groups obtained by removing one or two hydrogen atoms from polycycloalkanes such as norbornane, isobornane, tricyclodecane and tetracyclododecane.
- Such monocyclic or polycyclic alicyclic groups may be appropriately selected from among a number of proposed neutral components in the resin component of a resist composition such as for a KrF excimer laser or an ArF excimer laser. Can be used.
- a cyclohexyl group, a cyclopentyl group, an adamantyl group, a norvol group, and a tetracyclododecanyl group are industrially easily available, and they also have good point power.
- a mono ( ⁇ -) having a monocyclic alicyclic group-containing acid dissociable, dissolution inhibiting group such as a structural unit represented by the following general formula (60) (Lower alkyl) atalylic acid ester derived structural unit, polycyclic alicyclic group-containing acid dissociable, dissolution inhibiting group such as structural unit represented by the following general formulas ( 61 ), ( 62 ), and (63) Mono ( ⁇ -lower alkyl) acrylate having the following structural units (a2-1) or structural units represented by the following general formulas (64), (65) and (66) (a2-2) And the like.
- a mono ( ⁇ -) having a monocyclic alicyclic group-containing acid dissociable, dissolution inhibiting group such as a structural unit represented by the following general formula (60) (Lower alkyl) atalylic acid ester derived structural unit, polycyclic alicyclic group-containing acid dissociable, dissolution inhibiting group such as structural unit represented by the following general
- R is a hydrogen atom or a lower alkyl group, is a lower alkyl group, and t is an integer of 1 to 3.
- R is a hydrogen atom or a lower alkyl group, and is a lower alkyl group.
- R is a hydrogen atom or a lower alkyl group, and are each independently a lower alkyl group.
- R is a hydrogen atom or a lower alkyl group, and is a tertiary alkyl group.
- R is a hydrogen atom or a lower alkyl group.
- R is a hydrogen atom or a lower alkyl group.
- R is a hydrogen atom or a lower alkyl group.
- R 2G is preferably a lower linear or branched alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, and an n-butyl group.
- an alkyl group having 2 or more carbon atoms, preferably 2 to 5 carbon atoms is preferred.
- the acid dissociation tends to be higher than that of a methyl group.
- a methyl group and an ethyl group are preferred.
- R 21 is preferably a lower linear or branched alkyl group having 1 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group , An isobutyl group, a pentyl group, an isopentyl group, a neopentyl group and the like.
- an alkyl group having 2 or more carbon atoms, preferably 2 to 5 carbon atoms is preferred. In this case, the acid dissociation tends to be higher than that of a methyl group. Industrially, methyl and ethyl groups are preferred. Yes.
- R 22 and R 23 are each independently preferably a lower alkyl group having 1 to 5 carbon atoms.
- the acid dissociable, dissolution inhibiting group represented by the formula (62) tends to have a higher acid dissociation property than a 2-methyl-2-adamantyl group.
- R 22 and R 23 are preferably each independently a lower straight-chain or branched alkyl group similar to R 21 described above. Among them, the case where both R 22 and R 23 are a methyl group is industrially preferable.
- 2- (1-adamantyl) -2 Examples include structural units derived from propyl (meth) acrylate.
- R 24 is a tertiary alkyl group having 4 or 5 carbon atoms such as a tert-butyl group or a tert-amyl group. Preferred to,.
- the group COOR 24 may be bonded to position 3 or 4 of the tetracyclododele group shown in the formula, but since these are mixed with isomers, the bonding position cannot be specified. Absent. Similarly, the binding position of the carboxyl group residue of the mono ( ⁇ -lower alkyl) acrylate at the position 8 or 9 shown in the formula cannot be specified.
- the polymer compound (A) is a mono-lower compound containing a rataton-containing monocyclic or polycyclic group in addition to the structural unit (al) or in addition to the structural units (al) and (a2).
- Alkyl It is preferable to include a structural unit (a3) derived from an acrylate ester.
- a3 derived from an acrylate ester.
- the structural unit (a3) is a structural unit in which a monocyclic group having a rataton ring force or a polycyclic alicyclic group having a rataton ring is bonded to the ester side chain of a mono (mono-lower alkyl) acrylate.
- the rataton ring indicates one ring including the -O-C (O)-structure, and this is counted as the first ring. Therefore, here, a lactone ring alone is referred to as a monocyclic group, and a compound having another ring structure is referred to as a polycyclic group regardless of its structure.
- the structural unit (a3) specifically, for example, a monocyclic group excluding one ⁇ -petit mouth rataton force hydrogen atom or a rataton ring-containing polycycloalkane force hydrogen atom is excluded. And polycyclic groups.
- a mono ( ⁇ -lower alkyl) acrylate ester having a monocyclic group having a monocyclic lactone ring such as a structural unit represented by the following general formula (71)
- a mono ( ⁇ -lower alkyl) acrylate ester having a polycyclic alicyclic group having a rataton ring such as a structural unit represented by the following formula (72) to (75): And the like.
- a structural unit represented by the formula (71) is, in particular, excellent resolution, to further excellent in lithography properties such as depth of focus, preferably tool particularly, the ⁇ carbon on Rataton backbone
- Structural units that also induce the mono-lower alkyl) acrylate power of ⁇ -butyrate ratatone are preferred.
- R is a hydrogen atom or a lower alkyl group
- R d R are each independently Represents a hydrogen atom or a lower alkyl group.
- the structural unit (a3) the total of all the structural units that constitute the polymer compound (A), 10 to 75 mole 0/0, especially ⁇ This 20 to 70 mole 0/0, most preferably preferably it is contained 30 to 70 mole 0/0.
- the polymer compound (A) includes the structural units (al), (a2),
- Such structural units may have other structural units other than (a3). Examples of such structural units include the following structural units (a4) to (a6).
- Structural unit (a4) Structural unit that also induces mono ( ⁇ -lower alkyl) acrylate ester power containing polar group-containing aliphatic hydrocarbon
- Structural unit (a5) Mono ( ⁇ -lower alkyl) acrylate ester containing polycyclic aliphatic hydrocarbon group other than structural units (a2) to (a4) Induced structural unit
- Structural unit (a4) is a structural unit derived from a (meth) acrylic acid ester having a polar group-containing aliphatic hydrocarbon group.
- the hydrophilicity of the polymer compound (A) is increased, the affinity with the developer is increased, the alkali solubility in the exposed area is improved, and the resolution is improved. Contribute.
- Examples of the polar group include a hydroxyl group and a cyano group, and a hydroxyl group is particularly preferable.
- Examples of the aliphatic hydrocarbon group include a linear or branched hydrocarbon group having 1 to 10 carbon atoms (an alkylene group) and a polycyclic aliphatic hydrocarbon group (a polycyclic group).
- As the polycyclic group a large number of polycyclic groups similar to those exemplified in the structural unit (a2) can be appropriately selected and used.
- the hydrocarbon group in the polar group-containing aliphatic hydrocarbon group is a linear or branched hydrocarbon group having 1 to 10 carbon atoms
- (meth) acrylic acid Hydroxyl Ester Force when the hydrocarbon group which is preferred by the derived structural unit is a polycyclic group, the structural units represented by the following formulas (81) and (82) are preferred.
- Structural unit (a4) is 10% of the total of all the structural units constituting polymer compound (A).
- it is contained in an amount of up to 50 mol%, more preferably 20 to 40 mol%.
- the structural unit (a5) is a structural unit other than the structural units (a2) to (a4), from which the mono ( ⁇ -alkyl) acrylate power containing a polycyclic aliphatic hydrocarbon group is also derived.
- “other than the structural units (a2) to (a4)” means that they do not overlap with each other, and are referred to as a polycyclic aliphatic hydrocarbon group (hereinafter sometimes simply referred to as a polycyclic group). Include a number of polycyclic groups similar to those in the structural units (al) to (a4).
- the structure of 3) can be exemplified.
- the structural unit (a5) is preferably contained in an amount of 3 to 50 mol%, more preferably 5 to 35 mol%, based on the total of all the structural units constituting the polymer compound (A).
- the polymer compound (A) of the present invention is a structural unit which also induces —methyl) styrene force, and —methyl) hydroxystyrene force within a range that does not impair the effects of the present invention.
- a large number of constitutional units, such as constitutional units, which have been conventionally proposed as constitutional units of resin components of resist compositions for KrF excimer lasers, ArF excimer lasers, etc. may be included.
- the structural unit derived from ((X-methyl) styrene is a structural unit formed by the cleavage of the ethylene double bond of ((X-methyl) styrene), and the structural unit from which --methyl) hydroxystyrene force is also induced.
- a unit is a structural unit formed by cleavage of the ethylene double bond of -methyl) hydroxystyrene.
- ( ⁇ -methyl) styrene means one or both of styrene and ⁇ -methylstyrene
- (a-methyl) hydroxystyrene means one or both of hydroxystyrene and ⁇ -methylhydroxystyrene. I do.
- the combination and ratio of the structural units such as the structural unit (al) can be appropriately adjusted depending on the required characteristics and the like.
- Preferred specific examples of the polymer compound (A) include compounds represented by the following general formulas (A1) to (A4). And at least one selected from these copolymers.
- R represents a hydrogen atom or a methyl group.
- R represents a hydrogen atom or a methyl group.
- the high molecular compound can be obtained by, for example, polymerizing the monomer relating to each structural unit by known radical polymerization using a radical polymerization initiator such as azobisisobutyronitrile (AIBN).
- AIBN azobisisobutyronitrile
- the weight-average molecular weight (in terms of polystyrene by gel permeation chromatography, the same applies hereinafter) of the polymer compound (A) is not particularly limited, but it can be used for a positive resist composition. 2000 ⁇ 50000 power preferred ⁇ , 5000 ⁇ 30000 power preferred! /, 0
- the polymer compound of the first embodiment or the polymer compound (A) of the second embodiment of the present invention is useful as a base resin component of a positive photoresist composition.
- the positive resist composition of the present invention includes the polymer compound of the first aspect of the present invention (hereinafter, referred to as polymer compound (AA)) or the polymer compound of the second aspect (A) (hereinafter, referred to as “polymer compound (AA)”). These may be referred to as component (A), and (B) an acid generator component that generates an acid upon exposure (irradiation of radiation) (hereinafter sometimes referred to as component (B)). It is characterized by the following.
- the component (A) is the polymer compound (AA) or () of the present invention, and the polymer compound A) or (A) may be used alone or in combination of two or more.
- the polymer compound (AA) or (A) as described above is used in the chemically amplified positive resist system of the present invention
- the polymer compound has a hydrophilic property represented by the general formula (1).
- Acid dissociation Having a dissolution-inhibiting group, shows dissolution-inhibiting action in alkali development before exposure, exhibits alkali solubility by deprotection after exposure and PEB process, and has alkali solubility before and after exposure. Since a large change occurs, a fine pattern with high resolution can be provided. In addition, film loss of the resist pattern can be prevented.
- the proportion of the polymer compound (A) in the positive resist composition can be appropriately adjusted depending on the desired resist film thickness.
- polyhydroxystyrene resin, (meth) a resin, which has been conventionally proposed as a base resin component for a positive resist composition, has been proposed. It may contain various polymer compounds such as krill resin (hereinafter referred to as polymer compound ( ⁇ '), but for the effect of the present invention, the polymer compound is a polymer). It is preferable that the content is 80% by mass or more based on the total amount of the compound ( ⁇ ) and the polymer compound ( ⁇ '). 90% by mass or more is more preferable, and 100% by mass is most preferable. It is.
- any one of known acid generators can be appropriately selected and used.
- acid generators there have hitherto been used acid salt-based acid generators such as rhododium salt and sulfo-dum salt, oxime sulfonate-based acid generators, bisalkyl or bisarylsulfol-diazomethanes,
- diazomethane-based acid generators such as (bissulfol) diazomethanes and diazomethane-trobenzylsulfonates, iminosulfonate-based acid generators, and disulfone-based acid generators.
- Specific examples of the above-mentioned acid salt-based acid generator include trifluoromethanesulfonate or nonafluorobutanesulfonate of diphenylodonium, and trifluoromethanesulfonate of bis (4-tert-butylphenyl) iodonium.
- nonafluorobutanesulfonate trifluoromethanesulfonate of triphenylsulfonium, heptafluorenopropanesulfonate or nonafluorobutanesulfonate thereof, and triphenylenomethane sulfate of tri (4-methylphenyl) snolefonium Phonate, its heptafluorophenol propane sulfonate or its nonafluorobutane sulfonate, dimethyl (4-hydroxynaphthyl) sulfo-dimethyl trifluoromethane sulfonate, its heptafluoropropane sulfonate or Of the nonafluorobutanesulfonate, the trifluorone methanesulfonate of monophenyldimethylsulfonate, the heptafluoropropanesulfonate or the nonafluorobutanesulf
- Trifluoromethanesulfonate its heptafluoropropanesulfonate or its nonafluorobutanesulfonate, (4 methylphenyl) diphenylsulfonate-trifluoromethanesulfonate, its heptafluoropropanesulfonate or its nonafluorofluorobutanesulfonate , (4-Methoxyphenyl) diphenylsulfonium trifluoromethanesulfonate, its heptafluoropropanesulfonate or its nonafluorobutanesulfonate, tri (4-tert-butyl) phenyl Sulfo - ⁇ beam of triflate Ruo b methane sulfonate, its like hepta full O b propane sulfonate or a Nonafuruorobuta Nsuruhoneto thereof.
- the strength of an acid generated is lower than that of an acid salt having a fluorinated alkylsulfonate ion as an ion.
- Ordium salts having camphorsulfonic acid ions can also be used. Specifically below
- oxime sulfonate-based acid generator examples include (X- (P-toluenesulfo-roximino) -benzyl cyanide, ⁇ - ( ⁇ -chlorobenzenebenzenesulfo-roximino) -benzyl cyanide, ⁇ - ( 4-Nitrobenzenesulfo-roximino) -benzylcyadide, ⁇ - (4-nitro-2-trifluoromethylbenzenesulfonyloximino) -benzylcyanide-, ⁇ - (benzenesulfo-roxyimino) -4- Benzoyl cyanide, ⁇ - (benzensulfo-loxyimino) -2,4-dichlorobenzoylcyanide, ⁇ - (benzenesulfonyloxyimino) -2,6-dichlorobenzyl cyanide, ⁇ - (benzene Sulf
- bisalkyl or bisarylsulfur-diazomethanes include bis (isopropylsulfol) diazomethane, bis ( ⁇ -toluenesulfol) diazomethane, bis (1, Examples thereof include 1-dimethylethylsulfol) diazomethane, bis (cyclohexylsulfol) diazomethane, and bis (2,4 dimethylphenylsulfonyl) diazomethane.
- Poly (bissulfonyl) diazomethanes include, for example, 1,3 bis (phenylsulfoldiazomethylsulfol) propane having the following structure (distilled product: 135 ° C) ), 1,4-bis (phenylsulfol-diazomethylsulfol) butane (compound B, decomposition point 147 ° C), 1,6-bis (phenylsulfol-diazomethylsulfol) hexane (Compound C, melting point 132 ° C, decomposition point 145 ° C), 1,10 bis (phenylsulfordiazo Methylsulfol-decane (distilled compound D, decomposition point 147 ° C), 1,2-bis (cyclohexylsulfol-diazomethylsulfol-l) ethane (distilled compound E, decomposition point 149 ° C) C), 1,3-bis (cyclohexylsulf
- one of these acid generators may be used alone, or two or more may be used in combination.
- the content of the component (B) is preferably from 0.5 to 30 parts by mass relative to 100 parts by mass of the polymer compound (A). 1 to: LO parts by mass are more preferable. If the amount is less than the above range, pattern formation may not be performed sufficiently.If the amount exceeds the above range, a uniform solution is obtained and storage stability is reduced. It may cause the deterioration of the property.
- this photoresist composition can further contain the aforementioned low molecular compound for a photoresist composition as an acid dissociable, dissolution inhibitor (C).
- the low molecular compound as described above when used for the chemically amplified positive resist system of the present invention, the low molecular compound has a hydrophilic acid dissociable group represented by the general formula (1).
- the low molecular compound before exposure, it exhibits an action of inhibiting dissolution in alkali development, after exposure and PEB process, it exhibits alkali solubility due to deprotection, and the alkali solubility before and after exposure significantly changes.
- An image-forming fine pattern can be provided.
- film loss of the resist pattern can be prevented.
- the acid dissociable, dissolution inhibitor (C) is used in an amount of usually 3 to 50 parts by mass, preferably 5 to 30 parts by mass, based on 100 parts by mass of the base resin component (A). If the amount is less than the above range, the effect of improving the resolution and the shape of the turn cannot be obtained. If the amount is too large, the effect of improving the resolution and the shape of the pattern cannot be obtained, and the storage stability of the photoresist coating solution may be deteriorated.
- the positive resist composition of the present invention further includes an optional resist composition for improving the shape of the resist pattern and the stability of the latent image formed over time (post exposure stability of the latent image formed oy the pattern wise exposure or the resist layer).
- an optional resist composition for improving the shape of the resist pattern and the stability of the latent image formed over time (post exposure stability of the latent image formed oy the pattern wise exposure or the resist layer).
- a nitrogen-containing organic compound (D) hereinafter, referred to as a component (D)
- D nitrogen-containing organic compound
- any known component may be used arbitrarily.
- amines—ammonium salts, particularly secondary lower aliphatic amines—tertiary lower aliphatic Amin is preferred.
- Examples of the amine include aliphatic secondary amines such as getylamine, dipropylamine, dibutylamine and dipentylamine, trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, and N, N-dimethyl.
- Aliphatic tertiary amines such as propylamine, N-ethyl-N-methylbutylamine, trihexylamine, triheptylamine, trioctylamine, tride-lamine, tridodecylamine, and tritetrade-lamine (Trialkylamine, where the three alkyl groups attached to the nitrogen are They may be the same or different.
- Tertiary alkanolamines such as N, N-dimethylmonoethanolamine, triisopropanolamine, N, N-getylmonoethanolamine, triethanolamine and tributanolamine; Tertiary aromatic amines such as dimethyla-line, N, N-getyl aniline, N-ethyl-N-methyl aniline, N, N-dimethyl toluidine, N-methyl diphenyl-amine, N-ethyl diphenyl-amine, triphenylamine, etc. Can be mentioned.
- ammonium salt examples include quaternary ammonium ions, tetramethylammonium ions, tetraethylammonium ions, tetrapropylammonium ions, tetrabutylammonium ions and tetrapentylammonium ions. Salts of an alkylammonium ion with an ion of an organic carboxylic acid having a hydroxyl group such as lactic acid can be mentioned.
- lower tertiary alkanolamines such as triethanolamine, triisopropanolamine and tributanolamine, trihexylamine, triheptylamine, trioctylamine, tride-lamine, tridodecylamine, Trialkylamines having 6 to 15 carbon atoms, such as tritetrade force-lamine, are preferred because they have an excellent effect of reducing the film loss at the top part of the fine resist pattern.
- the nitrogen-containing organic compound (D) is generally used in the range of 0.01 to 5 parts by mass based on 100 parts by mass of the base resin component (A). If the amount is less than this range, the effect of suppressing the diffusion of the acid generated by exposure cannot be obtained, and if the amount is too large, the diffusion of the acid is excessively suppressed and the so-called exposure sensitivity is deteriorated. Absent.
- an organic carboxylic acid or an oxo acid of phosphorus or an organic carboxylic acid is further added as an optional component for the purpose of preventing sensitivity deterioration due to the addition of the nitrogen-containing organic compound (D). Its derivatives can be included.
- organic carboxylic acid for example, malonic acid, citric acid, malic acid, succinic acid, benzoic acid, salicylic acid and the like are suitable.
- Examples of the oxo acid of phosphorus or a derivative thereof include derivatives such as phosphoric acid such as phosphoric acid, di-n-butyl ester phosphate, and diphenyl phosphate ester, phosphonic acid, and dimethyl phosphonate. , Phosphonic acid-di-n-butyl ester, Derivatives such as phosphonic acids and their esters, such as pheninolephosphonic acid, dipheninoleestenol phosphonate, and dibenzinoleestenol phosphonate; phosphinic acids such as phosphinic acid and phenylphosphinic acid; and esters thereof.
- phosphonic acid is particularly preferred.
- the organic carboxylic acid or the oxo acid of phosphorus or a derivative thereof is used in an amount of 0.01 to 5.0 parts by mass per 100 parts by mass of the resin component (A).
- an organic carboxylic acid or an oxo acid of phosphorus or a derivative thereof (E) (hereinafter, referred to as a component (E)) may be further contained as an optional component.
- the component (D) and the component (E) can be used in combination, and one type can be used at a time.
- organic carboxylic acid for example, malonic acid, citric acid, malic acid, succinic acid, benzoic acid, salicylic acid and the like are suitable.
- Phosphorus oxoacids or derivatives thereof include phosphoric acid such as phosphoric acid, di-n-butyl phosphate, diphenyl phosphate, and derivatives such as esters thereof, phosphonic acid, dimethyl phosphonate, and phosphonic acid.
- Phosphonic acids such as acid-di-n-butyl ester, phenolphosphonic acid, phosphonic acid diphenyl ester, phosphonic acid dibenzyl ester and derivatives thereof such as esters, phosphinic acid, polyphosphinic acid, etc. Derivatives such as phosphinic acid and their esters are mentioned, of which phosphonic acid is particularly preferred.
- the component (E) is used in an amount of 0.01 to 5.0 parts by mass per 100 parts by mass of the component (A).
- the positive resist composition of the present invention may further contain, if desired, a miscible additive, for example, an additional resin for improving the performance of the resist film, a surfactant for improving coatability, and a dissolving agent.
- a miscible additive for example, an additional resin for improving the performance of the resist film, a surfactant for improving coatability, and a dissolving agent.
- Inhibitors, plasticizers, stabilizers, coloring agents, antihalation agents and the like can be added as needed.
- the positive resist composition of the present invention can be produced by dissolving the materials in an organic solvent.
- any one can be used as long as it can dissolve each component to be used and can form a uniform solution.
- the above can be appropriately selected and used.
- ⁇ -butyrolataton ketones such as acetone, methyl ethyl ketone, cyclohexanone, methyl isoamyl ketone, and 2-heptanone
- ethylene glycol ethylene glycol monomonoacetate, diethylene glycol, diethylene glycol monomonoacetate
- Polyhydric alcohols such as propylene glycol, propylene glycol monoacetate, dipropylene glycol, or monomethyl ether, monoethyl ether, monopropyl ether, monobutyl ether or monophenyl ether of dipropylene glycol monoacetate and derivatives thereof; and dioxane Cyclic ethers such as methyl lactate, ethyl lactate (EL), methyl acetate, ethyl acetate, butyl acetate, methyl pyruvate, ethyl pyruvate, methyl Methyl Kishipuropion acid, esters such as
- organic solvents may be used alone or as a mixed solvent of two or more. Further, a mixed solvent obtained by mixing propylene glycol monomethyl ether acetate (PGMEA) and a polar solvent is preferable.
- the mixing ratio may be appropriately determined in consideration of the compatibility between PGMEA and the polar solvent, but is preferably 1: 9 to 9: 1, more preferably 2: 8 to 8: 2. It is preferable to be within the range! / ,.
- the mass ratio of PGMEA: EL is preferably 2: 8 to 8: 2, more preferably 3: 7 to 7: 3! / ,.
- a mixed solvent of at least one selected from PGMEA and EL and ⁇ -petit mouth rataton is also preferable.
- the mixing ratio of the former and the latter is preferably 70:30 to 95: 5.
- the amount of the organic solvent used is not particularly limited, it is a concentration that can be applied to a support such as a substrate and is appropriately set according to the applied film thickness. It is used so that the partial concentration is in the range of 2 to 20% by mass, preferably 5 to 15% by mass.
- the method for forming a resist pattern using the positive resist composition of the present invention can be performed, for example, as follows.
- the positive resist composition is coated on a support such as silicon wafer by a spinner or the like, and the pre-beta is heated at a temperature of 80 to 150 ° C. for 40 to 120 seconds, preferably 60 to 90 seconds.
- the PEB exposure
- the PEB exposure
- the PEB exposure
- the PEB exposure
- an organic or inorganic antireflection film can be provided between the support (substrate) and the coating layer of the resist composition.
- the support is not particularly limited, and a conventionally known support can be used. Examples thereof include a substrate for an electronic component and a support on which a predetermined wiring pattern is formed. It comes out.
- the substrate examples include a substrate made of metal such as silicon-ano, copper, chromium, iron, and aluminum, and a glass substrate.
- the wiring pattern for example, copper, solder, chromium, aluminum, nickel, gold, and the like can be used.
- the wavelength used for exposure is not particularly limited.
- the positive resist composition according to the present invention is particularly effective for an ArF excimer laser.
- the conditions at that time that is, the number of rotations of the resist coating, the pre-beta temperature, the exposure conditions, the post-exposure heating conditions, and the alkali development conditions may be the conditions conventionally used.
- the rotation speed is about 2000 rpm, more specifically, about 1200-3500 rpm.
- the pre-beta temperature is in the range of 70-130 ° C., thereby forming a resist film thickness of 80-250 nm.
- Exposure may be performed through a mask.
- a mask in the selective exposure a known mask such as an ordinary binary mask or a phase shift mask is used.
- the heating temperature after exposure is in the range of 90 to 140 ° C, and the alkali developing condition is 1 to 5% by weight of TMAH (tetramethylammonium hydroxide) developer at 23 ° C for 15 to 90 seconds. And then rinse with water.
- TMAH tetramethylammonium hydroxide
- a resist pattern obtained by using the positive resist composition containing the polymer compound (AA) or (A) of the present invention has excellent resolution. Also, even when an acid generator that generates a weak acid is used, the resist pattern can be well resolved, and the range of choice of the acid generator is wide. .
- the structural unit (al) has a plurality of (meth) acrylate units. It is presumed that A is easily dissociated due to its high acid-decomposability. That is, since the structural unit (al) has a plurality of (meth) acrylate units, the alkali solubility after dissociation of A, which functions as an acid dissociable, dissolution inhibiting group, is improved, and the exposed portion and the unexposed portion have It is presumed that the resolution increases as the alkali-soluble contrast increases.
- the A force Oxal salt with camphorsulfonic acid when an acid generator is used, such as a generated acid, which has a weak strength and is easily dissociated even with an acid, and the generated acid has a weak strength It is presumed that the resist pattern can be well resolved even in this case.
- the positive resist composition of the present invention is also expected as a material for immersion lithography.
- immersion lithography conventionally uses an inert gas such as air or nitrogen during exposure.
- a method of filling a portion between the gas lens and the resist layer on the wafer with a solvent having a refractive index larger than that of air for example, a solvent such as pure water or a fluorine-based inert liquid, It is said that, even when using a light source with the same exposure wavelength, a high resolution is achieved and there is no reduction in the depth of focus, as with a light source with a shorter wavelength or a high NA lens. ing.
- a solvent having a refractive index larger than that of air for example, a solvent such as pure water or a fluorine-based inert liquid
- Paraformaldehyde was added to 1.3 propanediol, and 2.0 to 3.0 equivalents of hydrogen chloride gas were blown against 1,3 propanediol, and reacted at 50 ° C for 12 hours. After completion of the reaction, the product was distilled under reduced pressure to obtain 1,3 bis (chloromethoxy) propane (20).
- Paraformaldehyde was added to 1,4 cyclohexanedimethanol, and 2.0 to 3.0 equivalents of hydrogen chloride gas were blown against 1,4 cyclohexanedimethanol, and the mixture was reacted at 50 ° C for 12 hours. . After the completion of the reaction, the product was distilled under reduced pressure to obtain 1,4-bis (chloromethoxymethyl) cyclohexane (21).
- halogenated etherified conjugates represented by the above chemical formulas (19) to (21) were synthesized by addition polymerization or radical polymerization according to the procedures described in the following resin synthesis examples 1 to 4, and commercially available chemical formula (22) Or, it was introduced into resin 1 and resin 2 represented by (23) to obtain resin 3 to resin 6, which are polymer compounds of the present invention.
- Resins 1 to 6 are represented by the following chemical formulas (22) to (27).
- Table 1 shows the results of chemical analysis of these resins (weight average molecular weight, degree of dispersion, and introduction rate of acid dissociable, dissolution inhibiting groups).
- Organic anti-reflective coating composition “AR-19” (trade name, manufactured by Shipley) is applied on silicon wafer using a spinner, and baked on a hot plate at 215 ° C for 90 seconds and dried. Thus, an organic antireflection film of 82 nm was formed. Then, a positive photoresist composition to be described later is applied on the organic anti-reflection film using a spinner, pre-beta for 90 seconds at 110 ° C on a hot plate, and dried to obtain a resist having a thickness of 200 nm. A layer was formed.
- Positive photoresist yarn composition [0169] Positive photoresist yarn composition:
- the positive photoresist composition was prepared using the following acid generator and quencher in addition to resin 6.
- Resin 6 (27) 100 parts by weight Acid generator: triphenylsulfo-pum 'perfluorobutanesulfonate (hereinafter referred to as "TPS-PFBS”) 4.0 parts by weight
- TPS-PFBS triphenylsulfo-pum 'perfluorobutanesulfonate
- Quencher nitrogen-containing organic compound: triisopropanolamine
- the change in the dissolution rate due to dissolution was measured using a dissolution rate analyzer RDA-808RB (manufactured by LithoTech Japan) to determine the dissolution contrast (tan ⁇ ).
- Table 2 shows the obtained tan ⁇ .
- the positive photoresist composition was prepared using the following acid generator and resin in addition to resin 6.
- the positive photoresist composition was prepared using Resin 2 and the following acid generator and quencher.
- Resin 2 (23) can be used to change the exposure amount of F-type excimer laser
- the change in dissolution rate caused by the dissolution was measured using a dissolution rate analyzer RDA-808RB (manufactured by LithoTech Japan) to determine the dissolution contrast (tan 0).
- Table 2 shows the obtained tan ⁇ .
- Positive type The photoresist composition was prepared using Resin 2 and the following acid generator and quencher.
- resin 6 (Example 2), which is an example of the polymer compound of the present invention, has a higher dissolution contrast (tan 0) than resin 2 of Comparative Example 2. Therefore, as compared with Resin 2 of Comparative Example 2, it was clear that the resin exhibited an excellent pattern shape (rectangular shape) even at the same resolution and sensitivity of ArF exposure.
- the comparative resin 1 had a mass average molecular weight (Mw) of 8,780.
- Mw mass average molecular weight
- 13 C-NMR carbon-13 nuclear magnetic resonance spectrum
- An organic anti-reflective coating composition “ARC-29” (Prue Science) was applied on a silicon wafer using a spinner, baked on a hot plate at 205 ° C for 60 seconds, and dried. An organic antireflection film of 77 nm was formed. Then, a positive photoresist composition having the composition shown in Table 4 described below is applied on the organic anti-reflection film using a spinner, pre-beta on a hot plate at 120 ° C for 90 seconds, and dried. , 250 A nm resist layer was formed.
- T P S -P F BS Trifenylsul munonafluorobutanesul
- the positive photoresist composition containing resins 7, 9 which is an example of the polymer compound of the present invention has high resolution regardless of the type of the acid generator used.
- the resist pattern could be resolved.
- the high molecular weight compound which is useful in the present invention has a large change in alkali solubility before and after exposure in a chemically amplified positive resist system. It is useful for pattern formation, especially for KrF, ArF and F excimer laser exposure.
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Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05728789.8A EP1736485B1 (en) | 2004-04-13 | 2005-04-05 | Polymer compound, photoresist composition containing such polymer compound, and method for forming resist pattern |
| US11/578,189 US7700259B2 (en) | 2004-04-13 | 2005-04-05 | Polymer compound, photoresist composition containing such polymer compound, and method for forming resist pattern |
| US12/707,462 US8741538B2 (en) | 2004-04-13 | 2010-02-17 | Polymer compound, photoresist composition containing such polymer compound, and method for forming resist pattern |
Applications Claiming Priority (6)
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| JP2004117693 | 2004-04-13 | ||
| JP2004-117693 | 2004-04-13 | ||
| JP2004-181067 | 2004-06-18 | ||
| JP2004181068A JP4694153B2 (ja) | 2004-04-13 | 2004-06-18 | 高分子化合物、該高分子化合物を含有するフォトレジスト組成物、およびレジストパターン形成方法 |
| JP2004-181068 | 2004-06-18 | ||
| JP2004181067A JP4722417B2 (ja) | 2004-06-18 | 2004-06-18 | 化合物、高分子化合物、ポジ型レジスト組成物およびレジストパターン形成方法 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/578,189 A-371-Of-International US7700259B2 (en) | 2004-04-13 | 2005-04-05 | Polymer compound, photoresist composition containing such polymer compound, and method for forming resist pattern |
| US12/707,462 Division US8741538B2 (en) | 2004-04-13 | 2010-02-17 | Polymer compound, photoresist composition containing such polymer compound, and method for forming resist pattern |
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| WO2005100412A1 true WO2005100412A1 (ja) | 2005-10-27 |
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| PCT/JP2005/006657 Ceased WO2005100412A1 (ja) | 2004-04-13 | 2005-04-05 | 高分子化合物、該高分子化合物を含有するフォトレジスト組成物、およびレジストパターン形成方法 |
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| Country | Link |
|---|---|
| US (2) | US7700259B2 (ja) |
| EP (1) | EP1736485B1 (ja) |
| KR (1) | KR100848031B1 (ja) |
| TW (1) | TWI326008B (ja) |
| WO (1) | WO2005100412A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006112446A1 (ja) * | 2005-04-15 | 2006-10-26 | Tokyo Ohka Kogyo Co., Ltd. | 化合物、溶解抑制剤、ポジ型レジスト組成物、レジストパターン形成方法 |
| JP2007114412A (ja) * | 2005-10-19 | 2007-05-10 | Tokyo Ohka Kogyo Co Ltd | サーマルフロー用ポジ型レジスト組成物、レジストパターン形成方法、高分子化合物および該高分子化合物を用いたポジ型レジスト組成物 |
| JP2023051836A (ja) * | 2021-09-30 | 2023-04-11 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシー | フォトレジスト組成物及びパターン形成方法 |
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-
2005
- 2005-04-05 EP EP05728789.8A patent/EP1736485B1/en not_active Expired - Fee Related
- 2005-04-05 US US11/578,189 patent/US7700259B2/en active Active
- 2005-04-05 WO PCT/JP2005/006657 patent/WO2005100412A1/ja not_active Ceased
- 2005-04-05 KR KR1020067021229A patent/KR100848031B1/ko not_active Expired - Fee Related
- 2005-04-08 TW TW094111227A patent/TWI326008B/zh not_active IP Right Cessation
-
2010
- 2010-02-17 US US12/707,462 patent/US8741538B2/en not_active Expired - Lifetime
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| JPS595241A (ja) * | 1982-06-21 | 1984-01-12 | ヘキスト・アクチエンゲゼルシヤフト | 放射線重合可能な混合物 |
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| JPH08305025A (ja) * | 1995-04-21 | 1996-11-22 | Ocg Microelectron Materials Inc | 架橋されたポリマー |
| US6114462A (en) | 1996-04-24 | 2000-09-05 | Shin-Etsu Chemical Co., Ltd. | Chemically amplified positive resist composition, pattern forming method, and method for preparing polymer having a crosslinking group |
| JP2002244299A (ja) | 1996-04-24 | 2002-08-30 | Shin Etsu Chem Co Ltd | 化学増幅ポジ型レジスト材料及びパターン形成方法 |
| JPH1031310A (ja) * | 1996-07-17 | 1998-02-03 | Japan Synthetic Rubber Co Ltd | 感放射線性樹脂組成物 |
| JP2002062656A (ja) * | 2000-08-21 | 2002-02-28 | Tokyo Ohka Kogyo Co Ltd | 架橋形成ポジ型ホトレジスト組成物 |
| JP2002169292A (ja) * | 2000-12-04 | 2002-06-14 | Tokyo Ohka Kogyo Co Ltd | ポジ型レジスト組成物 |
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|---|
| F. HOULIHAN; A. ROMANO; D. RENTKIEWICZ; R. SAKAMURI; R.R. DAMMEL; W. CONLEY; G. RICH; D. MILLER; L. RHODES; J. MCDANIELS, J. PHOTOPOLYM. SCI. TECHNOL., vol. 16, 2003, pages 581 |
| See also references of EP1736485A4 * |
| Y. KAWAGUCHI; J. IRIE; S. KODAMA; S. OKADA; Y. TAKABE; 1. KANEKO; O. YOKOKOJI; S. ISHIKAWA; S. IRIE; T. HAGIWARA, PROC. SPIE, vol. 5039, 2003, pages 43 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006112446A1 (ja) * | 2005-04-15 | 2006-10-26 | Tokyo Ohka Kogyo Co., Ltd. | 化合物、溶解抑制剤、ポジ型レジスト組成物、レジストパターン形成方法 |
| JP2006316038A (ja) * | 2005-04-15 | 2006-11-24 | Tokyo Ohka Kogyo Co Ltd | 化合物、溶解抑制剤、ポジ型レジスト組成物、レジストパターン形成方法 |
| JP2007114412A (ja) * | 2005-10-19 | 2007-05-10 | Tokyo Ohka Kogyo Co Ltd | サーマルフロー用ポジ型レジスト組成物、レジストパターン形成方法、高分子化合物および該高分子化合物を用いたポジ型レジスト組成物 |
| JP2023051836A (ja) * | 2021-09-30 | 2023-04-11 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシー | フォトレジスト組成物及びパターン形成方法 |
| JP7584482B2 (ja) | 2021-09-30 | 2024-11-15 | デュポン エレクトロニック マテリアルズ インターナショナル,エルエルシー | フォトレジスト組成物及びパターン形成方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1736485A1 (en) | 2006-12-27 |
| US20070224520A1 (en) | 2007-09-27 |
| US20100151383A1 (en) | 2010-06-17 |
| TW200602810A (en) | 2006-01-16 |
| US7700259B2 (en) | 2010-04-20 |
| TWI326008B (en) | 2010-06-11 |
| KR100848031B1 (ko) | 2008-07-23 |
| EP1736485B1 (en) | 2013-07-31 |
| US8741538B2 (en) | 2014-06-03 |
| EP1736485A4 (en) | 2010-03-03 |
| KR20070009620A (ko) | 2007-01-18 |
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