WO2012053302A1 - Euvリソグラフィー用レジスト上層膜形成組成物 - Google Patents
Euvリソグラフィー用レジスト上層膜形成組成物 Download PDFInfo
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- WO2012053302A1 WO2012053302A1 PCT/JP2011/071139 JP2011071139W WO2012053302A1 WO 2012053302 A1 WO2012053302 A1 WO 2012053302A1 JP 2011071139 W JP2011071139 W JP 2011071139W WO 2012053302 A1 WO2012053302 A1 WO 2012053302A1
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- YXFVVABEGXRONW-UHFFFAOYSA-N Cc1ccccc1 Chemical compound Cc1ccccc1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
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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
- C08F212/00—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 an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/10—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with phenol
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/24—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with mixtures of two or more phenols which are not covered by only one of the groups C08G8/10 - C08G8/20
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
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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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2037—Exposure with X-ray radiation or corpuscular radiation, through a mask with a pattern opaque to that radiation
- G03F7/2039—X-ray radiation
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- H10P76/2041—
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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
- C08F12/00—Homopolymers and 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 an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by hetero atoms or groups containing heteroatoms
- C08F12/22—Oxygen
- C08F12/24—Phenols or alcohols
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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
- C08F212/00—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 an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
- C08F212/22—Oxygen
- C08F212/24—Phenols or alcohols
Definitions
- the present invention reduces an adverse effect exerted by EUV used in a device manufacturing process using EUV lithography and is effective for obtaining a good resist pattern, and a resist upper layer composition for EUV lithography, and the resist upper layer for EUV lithography
- the present invention relates to a method for manufacturing a semiconductor using a film composition.
- a thin film of a photoresist composition is formed on a substrate to be processed such as a silicon wafer, and irradiated with actinic rays such as ultraviolet rays through a mask pattern on which a semiconductor device pattern is drawn, and developed.
- actinic rays such as ultraviolet rays
- This is a processing method for etching a substrate to be processed such as a silicon wafer using the obtained photoresist pattern as a protective film.
- actinic rays used have also been shortened in wavelength from KrF excimer laser (248 nm) to ArF excimer laser (193 nm).
- an antireflection film (Bottom Anti-Reflective) is used as a resist underlayer film that plays a role of preventing reflection between the photoresist and the substrate to be processed.
- Coating BARC
- inorganic antireflection films such as titanium, titanium dioxide, titanium nitride, chromium oxide, carbon, ⁇ -silicon, and organic antireflection films made of a light-absorbing substance and a polymer compound are known. ing.
- the former requires equipment such as a vacuum deposition apparatus, a CVD apparatus, and a sputtering apparatus for film formation, whereas the latter is advantageous in that no special equipment is required, and many studies have been made.
- a substrate coated with an EUV resist is irradiated with EUV light, developed, and a resist pattern is formed.
- beryllium, boron, carbon, silicon, zirconium, niobium is formed on the upper layer of the EUV resist in order to protect the EUV resist from contaminants and to block unwanted radiation such as UV light and DUV (deep ultraviolet) light.
- a method including a polymer including a group including at least one selected from the group consisting of molybdenum Patent Document 1 and Patent Document 2.
- JP 2004-348133 A Japanese Patent Laid-Open No. 2008-198788
- an upper layer film of the EUV resist without intermixing with the EUV resist, exposure light which is not preferable for EUV exposure, for example, UV light or DUV light is blocked and only the EUV light is selectively transmitted.
- a composition for forming an upper layer film of an EUV resist for use in an EUV lithography process that can be developed with a developer.
- the present invention relates, as a first aspect, to a composition for forming an EUV resist upper layer film used in an EUV lithography process, which contains a resin containing a naphthalene ring in the main chain or side chain and a solvent.
- the composition for forming an EUV resist upper layer film according to the first aspect which comprises a group, a carboxyl group, a sulfo group, or a monovalent organic group containing at least one of these groups.
- the EUV resist according to the first aspect or the second aspect wherein the resin includes a unit structure represented by the formula (1) or a unit structure represented by the formula (1) and the formula (2).
- the present invention relates to an upper layer film-forming composition.
- R 1 and R 3 each independently represent a hydroxy group, a carboxyl group, a sulfo group or a monovalent organic group containing at least one of these groups;
- R 2 and R 4 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a benzyl group, a phenyl group, a halogen atom, an alkoxy group having 1 to 10 carbon atoms, a nitro group, or a cyano group.
- Ar 1 represents a benzene ring or an anthracene ring
- n1 and n2 each represents an integer of 0 to 6
- n3 and n4 Each represents 0 to the maximum integer that can be substituted with a benzene ring or an anthracene ring, provided that (n1) or (n1 + n3) is at least 1.
- the resin is represented by the unit structure represented by the formula (3), the unit structure represented by the formula (3) and the formula (4), or the formula (3) and the formula (5).
- T represents a single bond, or an ether group, an ester group, a carbonyl group, an amide group, or a divalent organic group containing at least one of these groups.
- R 7 , R 10 , R 12 And R 13 each independently represents a hydrogen atom or a methyl group
- R 5 , R 8 and R 11 each independently represent at least one of a hydroxy group, a carboxyl group, a sulfo group or a group thereof.
- R 6 and R 9 each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a benzyl group, a phenyl group, a halogen atom, Represents an atom, an alkoxy group having 1 to 10 carbon atoms, a nitro group, a cyano group, an alkylthio group having 1 to 10 carbon atoms, or a combination of two or more thereof, and n5 and n6 each represents an integer of 0 to 7 N8 And n9 each represents an integer of 0 to 5, provided that (n5), (n5 + n8), (n5 + n11), or (n5 + n8 + n11) is at least 1.
- the present invention relates to the composition for forming an EUV resist upper layer film according to any one of the first to fourth aspects, wherein the solvent is an alcohol solvent.
- the present invention relates to the composition for forming an EUV resist upper layer film according to any one of the first to fifth aspects, further comprising an acid compound.
- the present invention relates to the EUV resist upper layer film forming composition according to the sixth aspect, wherein the acid compound is a sulfonic acid compound or a sulfonic acid ester compound.
- the present invention relates to the EUV resist upper layer film-forming composition according to the sixth aspect, wherein the acid compound is an iodonium salt-based acid generator or a sulfonium salt-based acid generator.
- a step of forming an EUV resist film on the substrate Applying the EUV resist upper layer film-forming composition according to any one of claims 1 to 8 on the resist film and baking to form an EUV resist upper layer film, Exposing the semiconductor substrate coated with the resist upper layer film and the resist film; A step of developing after exposure to remove the resist upper layer film and the resist film;
- the present invention relates to a method for manufacturing a semiconductor device including:
- the present invention relates to the method for manufacturing a semiconductor device according to the ninth aspect, in which exposure is performed with EUV (wavelength: 13.5 nm) light.
- an upper layer film of the EUV resist it is possible to block out-of-BAND radiation that is not preferable for EUV exposure, for example, UV light or DUV light, without intermixing with the EUV resist.
- an EUV resist upper layer film-forming composition that can selectively transmit only EUV light and can form an EUV resist upper layer film that can be developed with a developer after exposure.
- the composition for forming an EUV resist upper layer film of the present invention can provide a resist upper layer film that can absorb DUV light of 200 to 240 nm, which is considered to be the most undesirable among the out-of-band light radiation contained in EUV exposure light.
- the resolution of the EUV resist can be improved.
- composition for forming an upper layer film of the EUV resist of the present invention when applied to the manufacture of a semiconductor device, no intermixing occurs with the EUV resist formed in the lower layer, and after the EUV exposure, the composition is developed together with the EUV resist. It can be removed by liquid.
- FIG. 1 shows resist upper layer films formed using the resist upper layer film forming compositions (solutions) obtained in Examples 1 to 3 and Comparative Example 1 at wavelengths of 200 nm to 240 nm using a spectrophotometer, respectively. It is a figure which shows the graph which measured the transmittance
- the present invention is directed to a composition suitable for an EUV resist upper layer film used in an EUV lithography process.
- a substrate coated with an EUV resist is irradiated with EUV light to be exposed.
- the EUV light may contain about 5% of light having a wavelength of 300 nm or less (that is, UV light or DUV light) in addition to the EUV light.
- light having a wavelength of about 190 to 300 nm, 190 to 250 nm, particularly about 200 to 240 nm leads to a decrease in sensitivity of the EUV resist and a deterioration of the pattern shape.
- the present inventors selected a polymer containing a naphthalene ring that selectively and efficiently absorbs DUV light near 200 to 240 nm as the polymer used for the EUV resist upper layer film.
- the EUV resist upper layer film-forming composition having high solubility in a system solvent has been completed.
- the EUV resist upper layer film formed from the composition of the present invention has a hydrophilic group composed of a hydroxyl group, a carboxyl group, a sulfo group, and an organic group containing these groups in the polymer as the material, thereby developing a developer. Since it can be dissolved in (for example, an alkaline developer), it can be dissolved and removed by the developer together with the EUV resist during development after exposure.
- an alkaline developer for example, an alkaline developer
- the present invention is an EUV resist upper layer film forming composition used in an EUV lithography process containing a resin containing a naphthalene ring in the main chain or side chain.
- the EUV resist upper layer film-forming composition contains a resin containing a naphthalene ring and a solvent, and may further contain a crosslinking agent, a crosslinking catalyst, and a surfactant.
- the solid content of the composition for forming an upper layer film of the EUV resist of the present invention is 0.1 to 50% by mass, preferably 0.5 to 30% by mass.
- the solid content is obtained by removing the solvent component from the composition for forming an upper layer film of the EUV resist.
- the content of the resin in the composition for forming an EUV resist upper layer film is 20% by mass or more in the solid content, for example, 20 to 100% by mass, or 30 to 100% by mass, or 50 to 90% by mass, or 60 to 80% by mass. %.
- the resin may contain a hydroxy group, a carboxyl group, a sulfo group, or a monovalent organic group containing at least one of these groups as a hydrophilic group.
- the resin is a resin including the structural unit represented by the formula (1), or both the structural unit represented by the formula (1) and the unit structure represented by the formula (2). It can be set as resin to contain.
- R 1 and R 3 are each independently a hydroxy group, a carboxyl group, a sulfo group, or a monovalent organic group containing at least one of these groups.
- R 2 and R 4 each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a benzyl group, a phenyl group, a halogen atom, or a carbon atom having 1 to 10 carbon atoms. It represents an alkoxy group, a nitro group, a cyano group, an alkylthio group having 1 to 10 carbon atoms, or a combination of two or more thereof.
- Ar 1 represents a benzene ring or an anthracene ring.
- n1 and n2 each represent an integer of 0 to 6
- n3 and n4 each represent 0 to the largest integer that can be substituted with a benzene ring or an anthracene ring (benzene ring: 4, anthracene ring: 8).
- (n1) or (n1 + n3) is at least 1.
- at least 1 can be 1, 2, 3, or 4.
- R 1 , R 2 , R 3 , and R 4 may be the same group or different groups.
- the resin includes a resin including a structural unit represented by the formula (3), a resin including two structural units of a structural unit represented by the formula (3) and a structural unit represented by the formula (4).
- a resin containing two structural units of a structural unit represented by formula (3) and a structural unit represented by formula (5), a structural unit represented by formula (3) and represented by formula (4) A resin containing three structural units of a structural unit represented by formula (5), a structural unit represented by formula (3), a structural unit represented by formula (5), and formula (6)
- R 7 , R 10 , R 12 and R 13 each independently represent a hydrogen atom or a methyl group
- R 5 , R 8 and R 11 are each independently A hydroxy group, a carboxyl group, a sulfo group or a monovalent organic group containing at least one of these groups, wherein R 6 and R 9 are each independently a group having 1 to 10 carbon atoms.
- n5 and n6 each represent an integer of 0 to 7
- n8 and n9 each represent an integer of 0 to 5.
- (n5), (n5 + n8), (n5 + n11), or (n5 + n8 + n11) represents at least 1.
- at least 1 can be 1, 2, 3, or 4.
- R 5 , R 6 , R 7 , and R 8 may be the same group or different groups.
- T represents a single bond or an ether group (—O—), an ester group (— (CO) O—), a carbonyl group (— (CO) —), an amide group (— (CO) — (NH) —). Or a divalent organic group containing at least one of these groups.
- the divalent organic group in T is a divalent organic group derived from an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a phenyl group, or the like exemplified below.
- the monovalent organic group in R 1 and R 3 is, for example, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a phenyl group exemplified below, a hydroxy group, a carboxyl group, A sulfo group or a monovalent organic group containing at least one of these groups is contained.
- the monovalent organic group in R 5 , R 8 and R 11 is an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a phenyl group, as exemplified below. A group, a sulfo group, or a monovalent organic group containing at least one of these groups.
- alkyl group having 1 to 10 carbon atoms examples include methyl group, ethyl group, n-propyl group, i-propyl group, cyclopropyl group, n-butyl group, i-butyl group, s-butyl group, t- Butyl, cyclobutyl, 1-methyl-cyclopropyl, 2-methyl-cyclopropyl, n-pentyl, 1-methyl-n-butyl, 2-methyl-n-butyl, 3-methyl-n -Butyl group, 1,1-dimethyl-n-propyl group, 1,2-dimethyl-n-propyl group, 2,2-dimethyl-n-propyl group, 1-ethyl-n-propyl group, cyclopentyl group, 1 -Methyl-cyclobutyl group, 2-methyl-cyclobutyl group, 3-methyl-cyclobutyl group, 1,2-dimethyl-cyclopropyl group, 2,3
- alkenyl group having 2 to 10 carbon atoms examples include ethenyl group, 1-propenyl group, 2-propenyl group, 1-methyl-1-ethenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, 2-methyl-1-propenyl group, 2-methyl-2-propenyl group, 1-ethylethenyl group, 1-methyl-1-propenyl group, 1-methyl-2-propenyl group, 1-pentenyl group, 2-pentenyl group 3-pentenyl group, 4-pentenyl group, 1-n-propylethenyl group, 1-methyl-1-butenyl group, 1-methyl-2-butenyl group, 1-methyl-3-butenyl group, 2-ethyl -2-propenyl group, 2-methyl-1-butenyl group, 2-methyl-2-butenyl group, 2-methyl-3-butenyl group, 3-methyl-1-butenyl group, 3-methyl-2-butenyl group 3-methyl-3methyl
- alkoxy group having 1 to 10 carbon atoms examples include methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, i-butoxy group, s-butoxy group, t-butoxy group, n -Pentyloxy group, 1-methyl-n-butoxy group, 2-methyl-n-butoxy group, 3-methyl-n-butoxy group, 1,1-dimethyl-n-propoxy group, 1,2-dimethyl-n -Propoxy group, 2,2-dimethyl-n-propoxy group, 1-ethyl-n-propoxy group, n-hexyloxy group, 1-methyl-n-pentyloxy group, 2-methyl-n-pentyloxy group, 3-methyl-n-pentyloxy group, 4-methyl-n-pentyloxy group, 1,1-dimethyl-n-butoxy group, 1,2-dimethyl-n-butoxy group, 1,3-dimethyl-n- The Xyl
- alkylthio group having 1 to 10 carbon atoms examples include an ethylthio group, a butylthio group, a hexylthio group, and an octylthio group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- the weight average molecular weight of the resin used in the composition for forming an EUV resist upper layer film of the present invention is 500 to 1,000,000, preferably 700 to 500,000, more preferably 1000 to 300,000, and still more preferably 1, 000 to 100,000.
- Examples of the resin include resins containing unit structures described in the following formulas (7-1) to (7-5) (resins having a naphthalene ring in the main chain), or formulas (8-1) to A resin containing a unit structure described in formula (8-7) (a resin containing a naphthalene ring in the side chain) can be used.
- an alcohol solvent can be preferably used as the solvent contained in the composition for forming an EUV resist upper layer film of the present invention.
- these alcohol solvents include 1-butanol, 2-butanol, isobutyl alcohol, tert-butyl alcohol, 1-pentanol, 2-pentanol, 3-pentanol, tert-amyl alcohol, neopentyl alcohol, 2- Methyl-1-butanol, 3-methyl-1-butanol, 3-methyl-3-pentanol, cyclopentanol, 1-hexanol, 2-hexanol, 3-hexanol, 2,3-dimethyl-2-butanol, 3 , 3-dimethyl-1-butanol, 3,3-dimethyl-2-butanol, 2-diethyl-1-butanol, 2-methyl-1-pentanol, 2-methyl-2-pentanol, 2-methyl-3 -Pentanol, 3-methyl-1-pentan
- the solvent is ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol propyl ether Acetate, toluene, xylene, methyl ethyl ketone, cyclopentanone, cyclohexanone, ethyl 2-hydroxypropionate, ethyl 2-hydroxy-2-methylpropionate, ethyl ethoxyacetate, ethyl hydroxyacetate, methyl 2-hydroxy-3-methylbutanoate, Methyl 3-methoxypropionate, 3-methoxy Ethyl propionate, ethyl 3-e
- the EUV resist upper layer film-forming composition of the present invention can further contain an acid compound in order to make the acidity of the resist present in the lower layer coincide in the lithography process.
- an acid compound for example, a sulfonic acid compound or a sulfonic acid ester compound can be suitably used.
- sulfonic acid or sulfonic acid ester compound examples include acidic compounds such as p-toluenesulfonic acid, trifluoromethanesulfonic acid, pyridinium p-toluenesulfonic acid, sulfosalicylic acid, and / or benzoin tosylate, 2-nitrobenzyl.
- acidic compounds such as p-toluenesulfonic acid, trifluoromethanesulfonic acid, pyridinium p-toluenesulfonic acid, sulfosalicylic acid, and / or benzoin tosylate, 2-nitrobenzyl.
- thermal acid generators such as tosylate, and salicylic acid, citric acid, benzoic acid, hydroxybenzoic acid, 2,4,4,6-tetrabromocyclohexadienone and the like can also be used.
- an acid generator that generates an acid by EUV irradiation may be added as an acid compound in order to match the acidity with the resist present in the lower layer in the lithography process.
- Preferred acid generators include, for example, onium salt acid generators such as bis (4-tert-butylphenyl) iodonium trifluoromethanesulfonate, triphenylsulfonium trifluoromethanesulfonate (eg, iodonium salt acid generator, sulfonium salt type).
- Acid generators such as phenyl-bis (trichloromethyl) -s-triazine, and sulfonic acid generators such as benzoin tosylate and N-hydroxysuccinimide trifluoromethanesulfonate. It is done.
- the compounding amount of these acid compounds is 0.02 to 10% by mass, preferably 0.04 to 5% by mass, per 100% by mass of the total solid content of the composition for forming an upper layer film of the EUV resist of the present invention.
- the rheology modifier is added mainly for the purpose of improving the fluidity of the resist upper layer film-forming composition.
- Specific examples include phthalic acid derivatives such as dimethyl phthalate, diethyl phthalate, diisobutyl phthalate, dihexyl phthalate, and butyl isodecyl phthalate; Mention may be made of maleic acid derivatives such as normal butyl maleate, diethyl maleate and dinonyl maleate, oleic acid derivatives such as methyl oleate, butyl oleate and tetrahydrofurfuryl oleate, or stearic acid derivatives such as normal butyl stearate and glyceryl stearate. it can.
- These rheology modifiers are usually blended at a ratio of less than 30% by mass with respect to 100% by mass of the total composition of the EUV resist upper layer film forming composition.
- a surfactant can be blended in order to further improve the coating property against surface unevenness without occurrence of pinholes and setups.
- the surfactant include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether, polyoxyethylene octylphenol ether, polyoxyethylene nonylphenol ether.
- Polyoxyethylene alkyl allyl ethers Polyoxyethylene alkyl allyl ethers, polyoxyethylene / polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan tristearate, etc.
- Sorbitan fatty acid esters polyoxyethylene sorbitan monolaurate, polyoxyethylene sol
- Nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters such as tan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan tristearate; EFTOP EF301, EF303, EF352 (manufactured by Tochem Products Co., Ltd.
- the compounding amount of these surfactants is usually 0.2% by mass or less, preferably 0.1% by mass or less, per 100% by mass of the total composition of the resist upper layer film-forming composition of the present invention.
- These surfactants may be added alone or in combination of two or more.
- Chemically amplified resist comprising a binder having a group that decomposes with an acid generator and an acid to change the alkali dissolution rate, a low molecular weight compound that decomposes with an alkali-soluble binder, an acid generator and an acid to change the alkali dissolution rate of the resist
- a chemically amplified resist comprising: a binder having a group that decomposes with an acid generator and an acid to change the alkali dissolution rate; and a chemically amplified resist comprising a low-molecular compound that decomposes with an acid to change the alkali dissolution rate of the resist,
- a non-chemically amplified resist composed of a binder having a group that is decomposed by EUV light to change the alkali dissolution rate
- a non-chemically amplified resist composed of a binder having a group that is decomposed by EUV light to change the alkali dissolution rate and a non-chemically ampl
- sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, ammonia Inorganic alkalis such as water, primary amines such as ethylamine and n-propylamine, secondary amines such as diethylamine and di-n-butylamine, tertiary amines such as triethylamine and methyldiethylamine, dimethylethanolamine, Alcohol aqueous solutions such as alcohol amines such as ethanolamine, quaternary ammonium salts such as tetramethylammonium hydroxide, tetraethylammonium hydroxide and choline, cyclic amines such as pyrrole and piperidine, and the like can be used.
- primary amines such as ethylamine and n-propylamine
- secondary amines such as diethylamine and di-n-butylamine
- tertiary amines such as triethyl
- an appropriate amount of an alcohol such as isopropyl alcohol or a nonionic surfactant may be added to the alkaline aqueous solution.
- an alcohol such as isopropyl alcohol or a nonionic surfactant
- preferred developers are quaternary ammonium salts, more preferably tetramethylammonium hydroxide and choline.
- a step of forming an EUV resist film with or without an EUV resist underlayer film on a substrate having a film to be processed for forming a transfer pattern, an EUV resist upper layer film forming composition on the resist film The semiconductor layer is coated and baked to form an EUV resist upper layer film, to expose the semiconductor substrate coated with the resist upper layer film and the resist film, and to develop after exposure to remove the resist upper layer film and the resist film.
- a device can be manufactured, and a method of manufacturing a semiconductor device including such steps is also an object of the present invention.
- the exposure is performed with EUV (wavelength 13.5 nm) light.
- the semiconductor device to which the composition for forming an EUV resist upper layer film of the present invention is applied has a structure in which a processing target film, a resist film, and a resist upper layer film are transferred in sequence on a substrate during the manufacturing process. It can take.
- the resist upper layer film formed from the composition for forming an EUV resist upper layer film of the present invention can reduce adverse effects exerted by the base substrate and EUV, and forms a good resist pattern with a straight shape after exposure to EUV light. As a result, a sufficient margin for EUV irradiation can be obtained.
- the resist upper layer film formed from the composition for forming an EUV resist upper layer film of the present invention can have a large wet etching rate equivalent to that of the resist film formed in the lower layer, and therefore is processed by the wet etching process.
- the resist pattern can be easily transferred to the underlying film (processing target film to which the pattern is transferred).
- This resin corresponds to a resin containing the structural unit described in the above formula (7-2). (Weight average molecular weight is 3,200.) 1 g was dissolved in 99 g of 4-methyl-2-pentanol to obtain an EUV resist upper layer film forming composition (solution).
- This resin corresponds to a resin containing the structural unit described in the above formula (7-2). (Weight average molecular weight is 2,800.) 1 g was dissolved in 99 g of 4-methyl-2-pentanol to obtain an EUV resist upper layer film forming composition (solution).
- Example 3 Vinyl naphthalene-containing resin (2-vinyl naphthalene: hydroxystyrene: methacrylic acid was radical polymerized at a mass ratio of 50:20:30. This resin contains a structural unit represented by the above formula (8-4). (The weight average molecular weight is 5,800.) 1 g was dissolved in 99 g of 4-methyl-2-pentanol to obtain an EUV resist upper layer film forming composition (solution).
- Comparative Example 1 1 g of polyhydroxystyrene resin (commercial product, weight average molecular weight: 8,000) was dissolved in 99 g of 4-methyl-2-pentanol to obtain an EUV resist upper layer film forming composition (solution).
- the resist upper layer film-forming composition (solution) prepared in Examples 1 to 3 and Comparative Example 1 of the present invention was applied onto the resist film using a spinner, and then on a hot plate at 100 ° C. for 1 minute. It heated, the resist upper layer film was formed, and the film thickness measurement was performed (film thickness B: sum of the film thickness of a resist and a resist upper layer film).
- a commercially available developer product name: NMD-3, manufactured by Tokyo Ohka Kogyo Co., Ltd.
- NMD-3 manufactured by Tokyo Ohka Kogyo Co., Ltd.
- the film was baked at 100 ° C. for 60 seconds to measure the film thickness (film thickness C).
- Table 1 When the film thickness A is equal to the film thickness C, it can be said that there is no intermixing with the resist.
- the transmittance at a wavelength of 13.5 nm was calculated by simulation from the relationship between the elemental composition ratio and the film density. And the transmittance
- the transmittance at 13.5 nm in each of Examples 1 to 3 and Comparative Example 1 was 88 (%).
- Examples 1 to 3 show the results that EUV light transmission is good and DUV light blocking properties are excellent, while Comparative Example 1 has a DUV light blocking property. The result was inferior. More specifically, as shown in FIG. 1, the films formed using the resist upper layer film forming compositions of Examples 1 to 3 have a light transmittance of less than 40% at wavelengths of 220 nm to 240 nm. In the films formed using the resist upper layer film-forming compositions of Example 1 and Example 2, the light transmittance is less than 40% over a wavelength range of 200 nm to 240 nm, and the light blocking property of DUV light is particularly high. The result that it was favorable was obtained.
- EUV resist used in an EUV lithography process that does not intermix with the EUV resist and selectively transmits only EUV by blocking unwanted exposure light such as UV and DUV, and can be developed with a developer after exposure. It is a composition for forming an upper layer film.
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Abstract
Description
このような反射防止膜としては、チタン、二酸化チタン、窒化チタン、酸化クロム、カーボン、α-シリコン等の無機反射防止膜や、吸光性物質と高分子化合物とからなる有機反射防止膜が知られている。前者は膜形成に真空蒸着装置、CVD装置、スパッタリング装置等の設備を必要とするのに対し、後者は特別の設備を必要としない点で有利とされ数多くの検討が行われている。
第2観点として、樹脂が親水性基としてヒドロキシ基、カルボキシル基、スルホ基、又はこれらの基のうち少なくとも一つの基を含む一価の有機基を含むものである、第1観点に記載のEUVレジスト上層膜形成組成物に関する。
第3観点として、樹脂が式(1)で表される単位構造、又は、式(1)及び式(2)で表される単位構造を含む、第1観点又は第2観点に記載のEUVレジスト上層膜形成組成物に関する。:
第4観点として、樹脂が式(3)で表される単位構造、又は、式(3)及び式(4)で表される単位構造、又は、式(3)及び式(5)で表される単位構造、又は、式(3)及び式(4)及び式(5)で表される単位構造、又は、式(3)及び式(5)及び式(6)で表される単位構造、又は、式(3)及び式(4)及び式(5)及び式(6)で表される単位構造を含む、第1観点又は第2観点に記載のEUVレジスト上層膜形成組成物に関する。:
第5観点として、溶剤がアルコール系溶剤である、第1観点乃至第4観点のいずれか1項に記載のEUVレジスト上層膜形成組成物に関する。
第6観点として、更に酸化合物を含む、第1観点乃至第5観点のいずれか1項に記載のEUVレジスト上層膜形成組成物に関する。
第7観点として、酸化合物がスルホン酸化合物又はスルホン酸エステル化合物である、第6観点に記載のEUVレジスト上層膜形成組成物に関する。
第8観点として、酸化合物がヨードニウム塩系酸発生剤又はスルホニウム塩系酸発生剤である、第6観点に記載のEUVレジスト上層膜形成組成物に関する。
第9観点として、基板上にEUVレジスト膜を形成する工程、
該レジスト膜上に請求項1乃至請求項8のいずれか1項に記載のEUVレジスト上層膜形成組成物を塗布し焼成してEUVレジスト上層膜を形成する工程、
該レジスト上層膜とレジスト膜で被覆された半導体基板を露光する工程、
露光後に現像し該レジスト上層膜とレジスト膜を除去する工程、
を含む半導体装置の製造方法に関する。
第10観点として、露光がEUV(波長13.5nm)光により行われる、第9観点に記載の半導体装置の製造方法に関する。
特に本発明のEUVレジスト上層膜形成組成物は、EUV露光光に含まれる帯域外光放射のなかでも、最も望ましくないとされる200~240nmのDUV光を吸収できるレジスト上層膜を提供でき、これにより、EUVレジストの解像性の向上を行うことができる。
また本発明のEUVレジスト上層膜形成組成物は、該組成物を半導体装置の製造に適用する際、下層に形成されるEUVレジストとインターミキシングが起きず、またEUV露光後には、EUVレジストと共に現像液によって除去可能である。
前述したように、EUVリソグラフィーを用いたデバイス作製工程では、EUVレジストを被覆した基板にEUV光を照射して露光させる。ここでEUVレジストの露光に際し、EUV光はEUV光以外に300nm以下の波長の光(すなわちUV光やDUV光)を5%程度含み得る。そして、例えば190~300nm、190~250nm、特に200~240nm付近の波長光はEUVレジストの感度低下やパターン形状の劣化につながる。特に線幅が22nm以下になると、このUV光やDUV光といった帯域外光放射(out-of-BAND radiation)の影響が出始め、EUVレジストの解像性に悪影響を与える。こうした200~240nm付近の望ましくない波長光を除去するために、リソグラフィーシステムにフィルターを設置する方法もあるが工程上複雑になるという課題がある。
一方、EUVレジストの上層にEUVレジスト上層膜を被覆する際に、EUVレジスト膜とEUVレジスト上層膜とのインターミキシング(層の混合)を防止するために、EUVレジスト上層膜形成時に用いる溶剤として、EUVレジストの溶剤を避けて、例えばアルコール系溶剤を用いることがあり、EUVレジスト上層膜材料にはアルコール系溶剤への高い溶解性も求められる。
こうした事情を鑑み、本発明者らは、EUVレジスト上層膜に用いられるポリマーとして、200~240nm付近のDUV光を選択的に効率よく吸収するナフタレン環を含むポリマーを選択し、また、該ポリマーにおいて、アルコール溶剤への溶解性を高めるためヒドロキシ基、カルボキシル基、スルホ基やこれらの基を含む有機基からなる親水性基を含めるものとすることにより、帯域外光放射の影響を抑制し且つアルコール系溶剤に対して高い溶解性を有するEUVレジスト上層膜形成組成物を完成させるに至った。
しかも本発明の組成物より形成されるEUVレジスト上層膜は、その材料であるポリマーにヒドロキシ基、カルボキシル基、スルホ基やこれらの基を含む有機基からなる親水性基を有することで、現像液(例えば、アルカリ性現像液)に溶解可能であるため、露光後の現像時にEUVレジストと共に現像液による溶解除去が可能である。
以下、本発明を詳細に説明する。
上記EUVレジスト上層膜形成組成物は、ナフタレン環を含む樹脂及び溶剤を含有し、更に架橋剤、架橋触媒、界面活性剤を含むことができる。
上記樹脂のEUVレジスト上層膜形成組成物における含有量は、固形分中で20質量%以上、例えば20~100質量%、又は30~100質量%、又は50~90質量%、又は60~80質量%である。
Ar1はベンゼン環又はアントラセン環を表す。
n1及びn2はそれぞれ0乃至6の整数を表し、n3及びn4はそれぞれ0乃至ベンゼン環又はアントラセン環に置換し得る最大の整数(ベンゼン環:4、アントラセン環:8)を表す。但し(n1)又は(n1+n3)は少なくとも1である。少なくとも1とは例えば、1、2、3、又は4とすることができる。
なお、n1、n2、n3、n4が2以上の整数を表す場合、R1、R2、R3、R4はそれぞれ同一の基であってもよいし、異なる基であってもよい。
n5及びn6はそれぞれ0乃至7の整数を表し、n8及びn9はそれぞれ0乃至5の整数を表す。但し、(n5)、(n5+n8)、(n5+n11)、又は(n5+n8+n11)は少なくとも1を表す。少なくとも1とは例えば、1、2、3、又は4とすることができる。
なお、n5、n6、n7、n8が2以上の整数を表す場合、R5、R6、R7、R8はそれぞれ同一の基であってもよいし、異なる基であってもよい。
Tは単結合、又はエーテル基(-O-)、エステル基(-(CO)O-)、カルボニル基(-(CO)-)、アミド基(-(CO)-(NH)-)を表すか、又はこれらの基のうち少なくとも一つの基を含む二価の有機基を表す。
R1及びR3における一価の有機基とは、下記に例示される炭素原子数1~10のアルキル基、炭素原子数2~10のアルケニル基、フェニル基等において、ヒドロキシ基、カルボキシル基、スルホ基、又はこれらの基のうち少なくとも一つの基を含む一価の有機基を含むものである。
R5、R8及びR11における一価の有機基とは、下記に例示される炭素原子数1~10のアルキル基、炭素原子数2~10のアルケニル基、フェニル基において、ヒドロキシ基、カルボキシル基、スルホ基、又はこれらの基のうち少なくとも一つの基を含む一価の有機基を含むものである。
これらその他の溶剤は、前記アルコール系溶剤に対して0.01~10.00質量%の割合で含有させることができる。
酸化合物としては、例えばスルホン酸化合物又はスルホン酸エステル化合物を好適に使用可能である。
好ましい酸発生剤としては、例えば、ビス(4-tert-ブチルフェニル)ヨードニウムトリフルオロメタンスルホネート、トリフェニルスルホニウムトリフルオロメタンスルホネート等のオニウム塩系酸発生剤類(例えばヨードニウム塩系酸発生剤、スルホニウム塩系酸発生剤)、フェニル-ビス(トリクロロメチル)-s-トリアジン等のハロゲン含有化合物系酸発生剤類、ベンゾイントシレート、N-ヒドロキシスクシンイミドトリフルオロメタンスルホネート等のスルホン酸系酸発生剤類等が挙げられる。
これらのレオロジー調整剤は、EUVレジスト上層膜形成組成物の全組成物100質量%に対して通常30質量%未満の割合で配合される。
これらの界面活性剤の配合量は、本発明のレジスト上層膜形成組成物の全組成物100質量%当たり通常0.2質量%以下、好ましくは0.1質量%以下である。これらの界面活性剤は単独で添加してもよいし、また2種以上の組合せで添加することもできる。
なお上記露光はEUV(波長13.5nm)光により行われる。
ナフトールノボラック樹脂(1-ナフトール:フェノール=50:50のモル比でホルムアルデヒドと反応しノボラック樹脂を合成した。この樹脂は、前述の式(7-2)に記載される構造単位を含む樹脂に相当する。重量平均分子量は3,200である。)1gを4-メチル-2-ペンタノール99gに溶解させ、EUVレジスト上層膜形成組成物(溶液)を得た。
ナフトールノボラック樹脂(1-ナフトール:フェノール=70:30のモル比でホルムアルデヒドと反応しノボラック樹脂を合成した。この樹脂は、前述の式(7-2)に記載される構造単位を含む樹脂に相当する。重量平均分子量は2,800である。)1gを4-メチル-2-ペンタノール99gに溶解させ、EUVレジスト上層膜形成組成物(溶液)を得た。
ビニルナフタレン含有樹脂(2-ビニルナフタレン:ヒドロキシスチレン:メタクリル酸=50:20:30の質量比でラジカル重合した。この樹脂は、前述の式(8-4)に記載される構造単位を含む樹脂に相当する。重量平均分子量は5,800である。)1gを4-メチル-2-ペンタノール99gに溶解させ、EUVレジスト上層膜形成組成物(溶液)を得た。
ポリヒドロキシスチレン樹脂(市販品。重量平均分子量は8,000)1gを4-メチル-2-ペンタノール99gに溶解させ、EUVレジスト上層膜形成組成物(溶液)を得た。
EUVレジスト溶液(メタクリル系レジスト)をスピナーを用いて塗布した。ホットプレート上で、100℃で1分間加熱することによりレジスト膜を形成し、膜厚測定を行なった(膜厚A:レジスト膜厚)。
そのレジスト上層膜上に市販の現像液(東京応化工業(株)製、製品名:NMD-3)を液盛りして60秒放置し、3,000rpmで回転させながら、30秒間純水でリンスを行った。リンス後、100℃で60秒間ベークし、膜厚測定を行なった(膜厚C)。得られた結果を表1に示す。
膜厚Aが膜厚Cに等しい場合、レジストとインターミキシングがないと言える。
本発明の実施例1乃至実施例3で調製されたレジスト上層膜形成組成物(溶液)、及び比較例1で示したレジスト上層膜形成組成物(溶液)を、それぞれスピナーを用いて石英基板上に塗布した。ホットプレート上で、100℃で1分間加熱し、レジスト上層膜(膜厚0.03μm)を形成した。そして、これら4種類のレジスト上層膜を、分光光度計を用い、波長190nm~240nmでの透過率を測定した。測定結果を図1に示す。
さらに詳細には、図1に示すように、実施例1乃至実施例3のレジスト上層膜形成組成物を用いて形成された膜は波長220nm~240nmの光の透過率が40%を下回り、特に実施例1及び実施例2のレジスト上層膜形成組成物を用いて形成された膜にいたっては、波長200nm~240nmに渡って光の透過率が40%を下回り、DUV光の遮光性が特に良好であるとする結果が得られた。
Claims (10)
- 主鎖又は側鎖にナフタレン環を含む樹脂及び溶剤を含む、EUVリソグラフィー工程に用いるEUVレジスト上層膜形成組成物。
- 樹脂が親水性基としてヒドロキシ基、カルボキシル基、スルホ基、又はこれらの基のうち少なくとも一つの基を含む一価の有機基を含むものである、請求項1に記載のEUVレジスト上層膜形成組成物。
- 樹脂が式(1)で表される単位構造、又は、式(1)及び式(2)で表される単位構造を含む、請求項1又は請求項2に記載のEUVレジスト上層膜形成組成物。:
(上記式中、R1及びR3は、それぞれ独立して、ヒドロキシ基、カルボキシル基、スルホ基又はこれらの基のうち少なくとも一つの基を含む一価の有機基を表し、R2及びR4は、それぞれ独立して、炭素原子数1~10のアルキル基、炭素原子数2~10のアルケニル基、ベンジル基、フェニル基、ハロゲン原子、炭素原子数1~10のアルコキシ基、ニトロ基、シアノ基、炭素原子数1~10のアルキルチオ基、又はそれらの2種以上の組み合わせを表す。Ar1はベンゼン環又はアントラセン環を表す。n1及びn2はそれぞれ0乃至6の整数を表し、n3及びn4はそれぞれ0乃至ベンゼン環又はアントラセン環に置換し得る最大の整数である。但し、(n1)、又は(n1+n3)は少なくとも1である。) - 樹脂が式(3)で表される単位構造、又は、式(3)及び式(4)で表される単位構造、又は、式(3)及び式(5)で表される単位構造、又は、式(3)及び式(4)及び式(5)で表される単位構造、又は、式(3)及び式(5)及び式(6)で表される単位構造、又は、式(3)及び式(4)及び式(5)及び式(6)で表される単位構造を含む、請求項1又は請求項2に記載のEUVレジスト上層膜形成組成物。:
(式中、Tは単結合、又はエーテル基、エステル基、カルボニル基、アミド基、又はこれらの基のうち少なくとも一つの基を含む二価の有機基を表す。R7、R10、R12及びR13は、それぞれ独立して、水素原子又はメチル基を表し、R5、R8及びR11は、それぞれ独立して、ヒドロキシ基、カルボキシル基、スルホ基又はこれらの基のうち少なくとも一つの基を含む一価の有機基を表し、R6及びR9は、それぞれ独立して、炭素原子数1~10のアルキル基、炭素原子数2~10のアルケニル基、ベンジル基、フェニル基、ハロゲン原子、炭素原子数1~10のアルコキシ基、ニトロ基、シアノ基、炭素原子数1~10のアルキルチオ基、又はそれらの2種以上の組み合わせを表す。n5及びn6はそれぞれ0乃至7の整数を表し、n8及びn9はそれぞれ0乃至5の整数を表す。但し、(n5)、(n5+n8)、(n5+n11)、又は(n5+n8+n11)は少なくとも1である。) - 溶剤がアルコール系溶剤である、請求項1乃至請求項4のいずれか1項に記載のEUVレジスト上層膜形成組成物。
- 更に酸化合物を含む、請求項1乃至請求項5のいずれか1項に記載のEUVレジスト上層膜形成組成物。
- 酸化合物がスルホン酸化合物又はスルホン酸エステル化合物である、請求項6に記載のEUVレジスト上層膜形成組成物。
- 酸化合物がヨードニウム塩系酸発生剤又はスルホニウム塩系酸発生剤である、請求項6に記載のEUVレジスト上層膜形成組成物。
- 基板上にEUVレジスト膜を形成する工程、
該レジスト膜上に請求項1乃至請求項8のいずれか1項に記載のEUVレジスト上層膜形成組成物を塗布し焼成してEUVレジスト上層膜を形成する工程、
該レジスト上層膜とレジスト膜で被覆された半導体基板を露光する工程、
露光後に現像し該レジスト上層膜とレジスト膜を除去する工程、
を含む半導体装置の製造方法。 - 露光がEUV(波長13.5nm)光により行われる、請求項9に記載の半導体装置の製造方法。
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| US13/880,470 US11675269B2 (en) | 2010-10-21 | 2011-09-15 | Composition for forming resist overlayer film for EUV lithography |
| KR1020137008604A KR101915138B1 (ko) | 2010-10-21 | 2011-09-15 | Euv 리소그래피용 레지스트 상층막 형성 조성물 |
| JP2012539643A JP6004179B2 (ja) | 2010-10-21 | 2011-09-15 | Euvリソグラフィー用レジスト上層膜形成組成物 |
| CN201180050223.3A CN103168274B (zh) | 2010-10-21 | 2011-09-15 | Euv光刻用抗蚀剂上层膜形成用组合物 |
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| JP2015102627A (ja) * | 2013-11-22 | 2015-06-04 | 三星電子株式会社Samsung Electronics Co.,Ltd. | 上層膜形成用組成物およびそれを用いたレジストパターン形成方法 |
| US9977331B2 (en) | 2014-02-26 | 2018-05-22 | Nissan Chemical Industries, Ltd. | Resist overlayer film forming composition and method for producing semiconductor device including the same |
| KR20160126970A (ko) | 2014-02-26 | 2016-11-02 | 닛산 가가쿠 고교 가부시키 가이샤 | 레지스트 상층막 형성 조성물 및 이것을 이용한 반도체장치의 제조방법 |
| KR20170035883A (ko) | 2014-07-24 | 2017-03-31 | 닛산 가가쿠 고교 가부시키 가이샤 | 레지스트 상층막 형성 조성물 및 이것을 이용한 반도체 장치의 제조방법 |
| US10042258B2 (en) | 2014-07-24 | 2018-08-07 | Nissan Chemical Industries, Ltd. | Composition for forming a resist upper-layer film and method for producing a semiconductor device using the composition |
| WO2016013598A1 (ja) * | 2014-07-24 | 2016-01-28 | 日産化学工業株式会社 | レジスト上層膜形成組成物及びそれを用いた半導体装置の製造方法 |
| JPWO2016136596A1 (ja) * | 2015-02-26 | 2017-07-06 | 富士フイルム株式会社 | 上層膜形成用組成物、並びに、それを用いたパターン形成方法及び電子デバイスの製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6004179B2 (ja) | 2016-10-05 |
| JPWO2012053302A1 (ja) | 2014-02-24 |
| KR101915138B1 (ko) | 2018-11-06 |
| CN103168274B (zh) | 2016-07-06 |
| KR20130129917A (ko) | 2013-11-29 |
| TW201224010A (en) | 2012-06-16 |
| TWI586716B (zh) | 2017-06-11 |
| US11675269B2 (en) | 2023-06-13 |
| CN103168274A (zh) | 2013-06-19 |
| US20130209940A1 (en) | 2013-08-15 |
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