WO2006049045A1 - スルホン酸エステルを含有するリソグラフィー用反射防止膜形成組成物 - Google Patents
スルホン酸エステルを含有するリソグラフィー用反射防止膜形成組成物 Download PDFInfo
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- WO2006049045A1 WO2006049045A1 PCT/JP2005/019612 JP2005019612W WO2006049045A1 WO 2006049045 A1 WO2006049045 A1 WO 2006049045A1 JP 2005019612 W JP2005019612 W JP 2005019612W WO 2006049045 A1 WO2006049045 A1 WO 2006049045A1
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1483—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing sulfur
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/26—Di-epoxy compounds heterocyclic
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/28—Di-epoxy compounds containing acyclic nitrogen atoms
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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
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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
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/942—Masking
- Y10S438/948—Radiation resist
- Y10S438/952—Utilizing antireflective layer
Definitions
- the present invention relates to an antireflection film forming composition for lithography used in a lithography process for manufacturing a semiconductor device. More specifically, the present invention relates to a composition for forming an antireflection film for lithography for forming an antireflection film under a photoresist, which is used for reducing reflection of exposure light from a semiconductor substrate. The present invention also relates to a method for forming a photoresist pattern using the composition for forming an antireflection film for lithography. Background art
- an antireflection film an inorganic antireflection film such as titanium dioxide, titanium nitride, and carbon, and an organic antireflection film made of a light-absorbing substance and a polymer compound are known.
- the former requires equipment such as vacuum deposition equipment, CVD equipment, and sputtering equipment for film formation, while the latter is advantageous in that it does not require special equipment, and many studies have been conducted.
- an organic antireflection film has a large absorbance with respect to light used for exposure and does not cause intermixing with a photoresist (insoluble in a photoresist solvent). ), When applying or heating and drying There are no low molecular diffusion materials in the dies and a large dry etching rate compared to the photoresist.
- the antireflection film is required to be able to form a photoresist pattern having a good shape.
- it is required to be able to form a rectangular photoresist pattern that does not have footing under it. This is because if the photoresist pattern has a skirt shape, it adversely affects subsequent processing steps.
- an antihalation composition containing a resin binder, a crosslinking agent compound, an acid and the like is known (see, for example, Patent Document 1 and Patent Document 2).
- an antireflective coating material composition comprising a polymer, a thermal crosslinking agent, and a sulfonic acid ester compound having a temperature at which decomposition begins to generate acid at 150 to 200 ° C. (for example, Patent Document 3). reference).
- compositions for an antireflection film using a reaction product of epoxy compound strength are known (see, for example, Patent Document 4 and Patent Document 5). Further, a composition for an antireflection film containing a compound having a triazine trione ring structure is known (see, for example, Patent Document 6).
- Patent Document 1 JP-A-6-118631
- Patent Document 2 JP-A-11 133618
- Patent Document 3 Japanese Patent Laid-Open No. 2000-98595
- Patent Document 4 U.S. Patent No. 6670425
- Patent Document 5 Japanese Unexamined Patent Application Publication No. 2004-212907
- Patent Document 6 International Publication No.04Z034148 Pamphlet
- An object of the present invention is to be used in a lithography process for manufacturing a semiconductor device using irradiation light of a KrF excimer laser (wavelength 248 nm), ArF excimer laser (wavelength 193 nm), or F2 excimer laser (wavelength 157 nm).
- An object of the present invention is to provide a composition for forming an antireflection film for lithography.
- another object of the present invention is to effectively absorb the reflected light of the substrate force when the irradiation light of KrF excimer laser, ArF excimer laser or F2 excimer laser is used for fine processing, and to form a photoresist layer.
- An antireflection film for lithography having a higher dry etching rate than that of a photoresist and an antireflection film forming composition therefor are provided.
- Another object of the present invention is to provide an antireflection film for lithography capable of forming a photoresist pattern having a good shape, and an antireflection film-forming composition therefor.
- the present inventors have conducted extensive research, and as a result, by using a composition containing a polymer compound, a crosslinkable compound, a crosslinking catalyst and a sulfonic acid ester compound, an excellent antireflection film can be obtained.
- the present invention has been completed by finding that it can be formed.
- the present invention includes a polymer compound, a crosslinkable compound, a crosslinking catalyst, a sulfonate ester compound, and a solvent, and an antireflection film for lithography, Film-forming composition,
- the polymer compound is a polymer compound having an aromatic hydrocarbon ring structure selected from a group force consisting of a benzene ring, a naphthalene ring, and an anthracene ring force.
- Antireflection film-forming composition as a third aspect, the polymer compound is a polymer compound having a nitrogen-containing ring structure selected from triazinetrione ring, imidazolidinedione ring, 2,5 pyrrolidinedione ring, and pyrimidinetrione ring force
- An antireflection film-forming composition for lithography according to the first aspect characterized by:
- the polymer compound has the formula (1):
- A, A, A, A, and A are each independently a hydrogen atom, a methyl group, or
- R and R are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms,
- the phenol group is an alkyl group having 1 to 6 carbon atoms, a halogen atom, or a carbon atom having 1 to 6 alkoxy groups, nitro groups, cyano groups, hydroxy groups, and alkylthio groups having 1 to 6 carbon atoms.
- Power group power may be substituted with selected groups. Also, R and R are bonded to each other.
- R is an alkyl group having 1 to 6 carbon atoms
- the file group is an alkyl group having 1 to 6 carbon atoms, a halogen atom, an alkoxy group having 1 to 6 carbon atoms, a nitro group, a cyano group, a hydroxy group, or an alkylthio group having 1 to 6 carbon atoms.
- the group force which is also a force may be substituted with a selected group.
- Q is the formula (5) or formula (6):
- Q is an alkylene group having 1 to 10 carbon atoms, a phenylene group, a naphthylene group, or
- n and n are each 0 or 1
- compositions for lithography characterized in that the composition is a polymer compound having a structure
- the antireflection film-forming composition for lithography according to the first aspect, wherein the crosslinkable compound is a nitrogen-containing compound having a nitrogen atom substituted with a hydroxymethyl group or an alkoxymethyl group object,
- the antireflection film-forming composition for lithography according to the first aspect, wherein the crosslinking catalyst is a sulfonic acid compound,
- the sulfonic acid ester compound is an alkyl sulfonic acid ester compound having an alkyl group having a carbon number of 1 to: LO.
- the antireflection film-forming composition for lithography according to the first aspect, wherein the sulfonic acid ester compound is an aromatic sulfonic acid ester compound object,
- the aromatic sulfonic acid ester compound is represented by the formula (7):
- Ar represents an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms,
- Group power consisting of a droxy group, a nitro group, a cyano group, an amino group, a halogen group, a carboxyl group, and an alkoxycarbo group having 1 to 6 carbon atoms.
- anthracene ring, R and R are independent
- composition for forming an antireflection film for lithography which is a compound having a structure represented by:
- the antireflection for lithography according to the ninth aspect, wherein the aromatic sulfonate ester compound is a compound having two to four structures represented by the formula (7):
- a film-forming composition wherein the aromatic sulfonate ester compound is a compound having two to four structures represented by the formula (7):
- composition for forming an antireflection film for lithography according to the eighth aspect, wherein the aromatic sulfonic acid ester compound is a toluene sulfonic acid ester compound,
- the sulfonic acid ester compound according to the first aspect is characterized in that it is a sulfonic acid ester compound having a 10% weight reduction temperature of 170 ° C or more by thermogravimetry.
- Antireflection film-forming composition is characterized in that it is a sulfonic acid ester compound having a 10% weight reduction temperature of 170 ° C or more by thermogravimetry.
- a step of applying the antireflection film-forming composition for lithography according to any one of the first to twelfth aspects on a semiconductor substrate and baking to form an antireflection film, the reflection Forming a photoresist on the anti-reflection film, exposing the semiconductor substrate coated with the anti-reflection film and the photoresist, and a photoresist after the exposure A photoresist pattern forming method used for manufacturing a semiconductor device.
- the composition for forming an antireflection film for lithography of the present invention exhibits strong absorption by short wavelength light, particularly KrF excimer laser (wavelength 248nm), ArF excimer laser (wavelength 193nm) or F2 excimer laser (wavelength 157nm).
- the antireflection film obtained from the composition for forming an antireflection film for lithography of the present invention efficiently absorbs reflected light from the substrate.
- composition for forming an antireflection film for lithography effectively absorbs reflected light from a semiconductor substrate during microfabrication using a KrF excimer laser, an ArF excimer laser, or the like, and forms a photoresist.
- An antireflection film that does not cause intermixing with the layer can be provided.
- the antireflection film-forming composition for lithography of the present invention can provide an antireflection film having a higher etching rate than a photoresist.
- the antireflection film-forming composition for lithography of the present invention comprises a polymer compound, a crosslinkable compound, a crosslinking catalyst, a sulfonic acid ester compound and a solvent.
- the lithographic antireflection film-forming composition of the present invention can contain a photoacid generator, a surfactant, and the like.
- the ratio of the solid content in the antireflection film-forming composition is not particularly limited as long as each component is uniformly dissolved in the solvent, but is, for example, 0.5 to 50% by mass, or 1 to 30 % By mass, or 3-25% by mass, or 5-15% by mass.
- the solid content is obtained by removing the solvent component from all the components of the antireflection film-forming composition.
- the antireflection film-forming composition for lithography of the present invention contains a polymer compound.
- the polymer compound is not particularly limited. Polymer compounds that have been used for antireflection coatings so far can be used. For example, polymer compounds such as polyester, polystyrene, polyimide, acrylic polymer, methallyl polymer, polyvinyl ether, phenol novolak, naphthol novolak, polyether, polyamide, and polycarbonate can be used.
- a polymer compound having an aromatic ring structure can be used as the polymer compound contained in the antireflection film-forming composition for lithography of the present invention.
- the aromatic ring structure include aromatic hydrocarbon ring structures such as a benzene ring, a naphthalene ring, an anthracene ring, and a naphthacene ring.
- examples of the aromatic ring structure include aromatic hetero ring structures such as a pyridine ring, a thiophene ring, a thiazole ring, a quinoline ring, a quinoxaline ring, a benzothiazole ring, and an atalidine ring.
- aromatic hetero ring structures such as a pyridine ring, a thiophene ring, a thiazole ring, a quinoline ring, a quinoxaline ring, a benzothiazole ring, and an atalidine ring.
- the kind thereof may be one kind or two or more kinds of aromatic ring structures.
- the polymer compound contained in the antireflection film-forming composition for lithography of the present invention a polymer having a hydroxy group or a carboxyl group may be used from the viewpoint of crosslinkability with a crosslinkable compound. it can.
- the polymer compound contained in the antireflection film-forming composition for lithography of the present invention includes a polymer compound having the aromatic ring structure and a hydroxy group, and a polymer compound having the aromatic ring structure and a carboxyl group. , Can be used.
- Examples of the polymer compound having a benzene ring structure as an aromatic ring structure include benzene such as benzyl acrylate, benzyl methacrylate, phenol acrylate, styrene, hydroxystyrene, benzyl vinyl ether, and N-phenol maleimide. Examples thereof include polymer compounds that can be synthesized by a polymerization reaction using a compound having a ring as a monomer compound.
- a polymer compound having a naphthalene ring structure as an aromatic ring structure a compound having a naphthalene ring such as naphthyl atallylate, naphthylmethyl metatalylate, and burnaphthalene is used as a monomer compound, and a polymerization reaction is performed.
- a polymerization reaction is performed as a monomer compound, and a polymerization reaction is performed.
- the polymer compound which can be mentioned can be mentioned.
- the polymer compound having an anthracene ring structure as an aromatic ring structure may be synthesized by using a monomer compound having an anthracene ring such as anthryl metatalylate, anthryl methyl metatalylate, and bur anthracene. It is possible to list polymer compounds that can be used.
- the polymer compound contained in the composition for forming an antireflective film for lithography of the present invention includes a repeating unit structure selected from the following formulas (8) to (11), and all repeating units constituting the polymer compound.
- Polymer compounds having a proportion of 10 to 100%, or 20 to 95%, or 25 to 75%, or 30 to 50% based on the unit structure can be used.
- R represents a hydrogen atom or a methyl group
- ml represents a number of 0, 1 or 2.
- Ar is an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, hydro
- Xyl group, fluorine atom, chlorine atom, bromine atom, iodine atom, cyano group, and -tro group group force which may be substituted with a selected group, may represent a benzene ring, a naphthalene ring or an anthracene ring.
- alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, an isopropyl group, a cyclopentyl group, a normal hexyl group, and an isobutyl group.
- alkoxy group having 1 to 6 carbon atoms examples include a methoxy group, an ethoxy group, an isopropoxy group, and a cyclohexyl group.
- the structures of formula (8) and formula (11) can be introduced into the polymer compound by using monomeric compounds such as benzyl metatalylate, anthryl methyl metatalylate and styrene.
- the structures of the formulas (9) and (10) are obtained by synthesizing a polymer compound using glycidyl atylate or glycidyl metatalylate, and then adding a phenol compound (Ar-OH) or a carboxylic acid to the epoxy ring portion. Obtained by reacting acid compound (Ar—COOH)
- the polymer compound contained in the antireflection film-forming composition for lithography of the present invention is selected from the formulas (12) to (14) together with the repeating unit structure selected from the formulas (8) to (11).
- the ratio is expressed as the sum of the selected repeating unit structure and other repeating unit structures (formula (12) to (14) force). ), 90% or less, for example, 5 to 90%, or 25 to 75%, or 50 to 70% with respect to all repeating unit structures constituting the polymer compound.
- the structures of the formulas (12) to (14) are acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxy ethino methacrylate, 2-hydroxypropino methacrylate, 2-hydroxy
- monomer compounds such as propyl acrylate, 2, 3 dihydroxypropyl methacrylate and butyl alcohol, it can be introduced into the polymer compound.
- repeating unit structures include acrylic acid ester compound, methacrylic acid ester compound, acrylamide compound, methacrylamide compound, bur compound, maleimide compound, maleic anhydride, acrylonitrile, etc.
- a monomer compound capable of undergoing polymerization reaction it can be introduced into the polymer compound.
- Examples of the acrylate compound include methyl acrylate, ethyl acrylate, isopropyl butyl acrylate, 2, 2, 2 trifluoroethyl acrylate, 4-hydroxybutyl acrylate, isobutyl acrylate, and cyclohexane.
- Xyl Atylate a-Atallyloyloxy 1-gamma-butyrolatatone, Isovolyl Atylate, 2-Methoxyethyl Atylate, Methoxytriethylene Glycol Atylate, 2-Ethoxyethyl Atylate, Tetrahydryl Furfuryl Atallate Examples include 2-methyl-2-adamantyl acrylate and 8-methyl-8-tricyclodecyl acrylate.
- Examples of the methacrylic acid ester compounds include ethyl methacrylate, normal propyl methacrylate, normal pentyl methacrylate, cyclohexyl methacrylate, 2, 2, 2-trifluoroethyl methacrylate, 2 , 2, 2-Trichlorodiethyl methacrylate, Isodecyl methacrylate, Normal butoxychetyl methacrylate, 3 Chloro-2-hydroxypropynole methacrylate, 2-Methyl-2-adamantyl methacrylate, ⁇ -Methacryloyloxy Examples include seagamma butyrololataton and 2, 2, 3, 3, 4, 4, 4 heptafluorobutyl metatalylate.
- Examples of acrylamide compounds include acrylamide, N-methyl acrylamide, N-ethyl acrylamide, N-benzyl acrylamide, N-phenyl acrylamide, and N, N-dimethyl
- methacrylic acid amide compounds examples include methacrylamide, N-methyl methacrylamide, N-ethyl methacrylamide, N-benzyl methacrylamide, N-phenyl methacrylamide, and N, N dimethyl methacrylamide. Can be mentioned.
- Examples of the bur compound include methyl butyl ether, benzyl butyl ether, 2-hydroxyschetyl vinyl ether, phenyl vinyl ether, 1-vinyl naphthalene, 2- bur naphthalene, 9 bil anthracene, and propyl butyl ether. It is possible.
- maleimide compounds include maleimide, N-methylmaleimide, N-phenol maleimide, and N-cyclohexylmaleimide.
- the polymer compound having a repeating unit structure selected from the formulas (8) to (11) is obtained by adding a polymerization initiator such as the monomer compound and azobisisobutyl-tolyl to an appropriate organic solvent.
- a polymerization initiator such as the monomer compound and azobisisobutyl-tolyl
- the polymer compound contained in the composition for forming an antireflective film for lithography of the present invention has a repeating unit structure in which the forces of formulas (15) to (17) are also selected, and all repeating units constituting the polymer compound.
- Polymer compounds having a proportion of 20 to 100%, or 30 to 90%, or 40 to 70%, or 50 to 60% of the structure can be used.
- Ar is as defined above.
- These polymer compounds can be synthesized from phenol novolac compounds.
- a glycidyl group is introduced into all or part of the hydroxyl group of phenol novolac, and a phenol compound (Ar—OH) or a carboxylic acid compound is incorporated into all or part of the epoxy ring of the glycidyl group.
- a phenol compound (Ar—OH) or a carboxylic acid compound is incorporated into all or part of the epoxy ring of the glycidyl group.
- the polymer compound contained in the antireflection film-forming composition for lithography of the present invention also includes a triazine trione ring, an imidazolidinedione ring, a 2,5-pyrrolidinedione ring, and a pyrimidinetrione ring force. It is possible to use a polymer compound having a ring structure.
- Polymer compounds having a 2,5-pyrrolidinedione ring include maleimide, N-methylmaleimide, N-ethylmaleimide, N-benzylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide.
- Examples thereof include polymer compounds that can be synthesized by a polymerization reaction using a maleimide compound as a monomer compound.
- polymer compound having triazine trione ring, imidazolidinedione ring, or pyrimidine trione ring examples include a polymer compound having a repeating unit structure represented by the formula (1).
- A, A, A, A, and A are each independently a hydrogen atom or a methyl group
- X represents the structure represented by formula (2), formula (3) or formula (4), and Q is
- the ring is an imidazolidinedione ring, and when X is formula (3), the ring is a pyrimidine trio.
- the ring is a triazine trione ring.
- R and R each independently represent a hydrogen atom or a carbon atom number of 1 to 6
- An alkyl group having 3 to 6 carbon atoms, a benzyl group or a phenyl group, and the phenol group is an alkyl group having 1 to 6 carbon atoms, a halogen atom, a carbon atom.
- An alkoxy group having 1 to 6 atoms, a nitro group, a cyano group, a hydroxy group, and an alkylthio group having 1 to 6 carbon atoms may be substituted with a group selected.
- R is an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 3 to 6 carbon atoms
- the phenyl group is an alkyl group having 1 to 6 carbon atoms, a halogen atom, an alkoxy group having 1 to 6 carbon atoms, a nitro group, a cyan group, or a hydroxy group.
- a group and an alkylthio group having 1 to 6 carbon atoms may be substituted with a group selected from the group forces.
- Q is an alkylene group having 1 to 10 carbon atoms, a phenylene group, a naphthylene group, or
- Each of the phenylene group, the naphthylene group, and the anthrylene group is an alkyl group having 1 to 6 carbon atoms, a halogen atom, an alkoxy group having 1 to 6 carbon atoms, or a nitro group, respectively. And a group selected from the group consisting of a cyano group, a hydroxy group, and an alkylthio group having 1 to 6 carbon atoms.
- n and n are each 0
- X represents the structure of formula (2) or formula (3).
- Examples of the alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, an isopropyl group, a cyclopentyl group, a normal hexyl group, and an isobutyl group.
- Examples of alkenyl groups having 3 to 6 carbon atoms include 1 propellate group, 2 propellyl group, 2 butur group, 3 -butur group, cyclopentene 3-yl group and 4 pentale group Can be mentioned.
- Examples of the alkoxy group having 1 to 6 carbon atoms include a methoxy group, an ethoxy group, an isopropoxy group, and a cyclohexenyl group. Charcoal formed by combining R and R together
- Examples of the ring having 3 to 6 atoms include a cyclobutane ring, a cyclopentane ring and a cyclohexane ring.
- Examples of the alkylene group having 1 to 10 carbon atoms include methylene group, ethylene group, propylene group, normal pentylene group, cyclohexylene group and 2-methylpropylene group.
- Examples of the alkylthio group having 1 to 6 carbon atoms include a methylthio group, an ethylthio group, and an isopropylthio group.
- the polymer compound having a repeating unit structure represented by the formula (1) is synthesized, for example, by a reaction between a compound represented by the formula (18) and a compound represented by the formula (19). be able to. Further, it can be synthesized by a reaction between the compound represented by the formula (20) and the compound represented by the formula (21).
- the reaction of the compound of formula (18) with the compound of formula (19), and the compound of formula (20) with the compound of formula (21) is benzene, toluene, xylene, ethyl lactate, butyl lactate, propylene glycol. It is preferable to carry out in a solution state dissolved in a suitable organic solvent such as organic monomethyl ether, propylene glycol monomethyl ether acetate and N-methylpyrrolidone. In this reaction, only one type of each of the compounds of formulas (18), (19), (20), and (21) can be used, or two or more types of compounds can be used in combination.
- reaction time and reaction temperature of this reaction are the same as the reaction time of 0.1 ⁇ : LOO time, reaction temperature is appropriately selected from the range of 20 ° C to 200 ° C.
- reaction temperature is appropriately selected from the range of 20 ° C to 200 ° C.
- this reaction is performed at a reaction temperature of 80 ° C to 150 ° C for a reaction time of 1 to 30 hours.
- a catalyst it can be used in the range of 0.01 to 20% by mass with respect to the total mass of the compound used.
- the ratio of the compounds represented by the formula (18) and the formula (19) used in the reaction is as follows: the compound of the formula (18): the compound of the formula (19) in a molar ratio of 3: 1 to 1: 3, or 3: 2 to 2: 3, or 1: 1.
- the ratio of the compounds represented by formula (20) and formula (21) used in the reaction is as follows: The compound of formula (20): The compound of formula (21) in a molar ratio of 3: 1 to 1: 3, Or 3: 2 to 2: 3, or 1: 1.
- the two reaction sites (epoxy ring moieties) of the compound of the formula (20) are each different from the compound of the formula (21).
- An epoxy ring-opening reaction occurs between them.
- a polymer compound having a repeating unit structure represented by the formula (1) is formed.
- the polymer compound is considered to basically consist of a repeating unit structure represented by the formula (1) except for the terminal portion.
- Specific examples of the compound represented by the formula (18) include, for example, hydantoin, 5,5 diphenyl-hydantoin, 5,5-dimethylhydantoin, 5-ethylhydantoin, 5-benzylhydantoin, 5-Ethyl 5-phenolhydantoin, 5-Methylhydantoin, 5,5-Tetramethylenehydantoin, 5,5-pentamethylenehydantoin, 5-(4-hydroxybenzyl) monohydantoin, 5-phenolhydantoin Hydantoin compounds such as 5-hydroxymethylhydantoin, and 5- (2-cyanethyl) hydantoin.
- Specific examples of the compound represented by the formula (18) include, for example, 5, 5 jetyl barbituric acid, 5, 5-diallylmalo-lurea, 5-ethyl-5-isoamylbarbituric acid, 5-Arylu 5-isobutyl barbituric acid, 5-Aryleu 5-isopropyl Barbituric acid, 5-13-Bromoallyl 5—sec Butylbarbituric acid, 5-Ethrulu 5— (1-Methyl-1-buturyl) barbituric acid, 5 Isopropyl 5--j8—Butyl molylbarbituric acid, 5-— ( 1-Cyclohexyl) 5 Ethylmalo-Lurea, 5 -Ethyl-5- (1-Methylbutyl) malo-Lurea, 5, 5 Dibromobarbituric acid, 5-Ferrolu 5-Ethylbarbituric acid, and 5-Ethylu Examples thereof include barbituric
- Specific examples of the compound represented by the formula (18) include monoallyl isocyanuric acid, monomethyl isocyanuric acid, monopropyl isocyanuric acid, monoisopropyl isocyanuric acid, monophene -Isocyanuric acid compounds such as leuisocyanuric acid, monobenzil isocyanuric acid, and monoethyl isocyanuric acid.
- terephthalic acid diglycidyl ester isophthalic acid diglycidyl ester, phthalic acid diglycidyl ester, 2,5-dimethylterephthalic acid diglycidyl ester, 2 , 5 Jetylterephthalic acid diglycidyl ester, 2, 3, 5, 6-tetrachloroterephthalic acid diglycidyl ester, 2, 3, 5, 6-tetrabromoterephthalic acid diglycidyl ester, 2-troterephthalic acid Diglycidyl ester, 2, 3, 5, 6—Tetrafluoroterephthalic acid diglycidyl ester, 2, 5—Dihydroxyterephthalic acid diglycidyl ester, 2, 6 Dimethylterephthalic acid diglycidyl ester, 2, 5 Dichloroterephthalic acid Diglycidyl ester, 2,3 Dichlorodiisophthalic acid diglycidyl ester, 3-trois
- specific examples of the compound represented by the formula (19) include, for example, 1,3 diglycidylhydantoin, 1,3 diglycidyl mono-5,5 diphenylhydantoin, 1,3 diglycidyl diluo 5, 5 Dimethylhydantoin, 1,3 Diglycidyl 5—Methylhydantoin, 1,3 Diglycidyl 1-5 Ethyl 5 Phenhyridin, 1,3 Diglycidyl 1 5-Benzylhydantoin, 1,3 Diglycidyl 5 Hydantoin acetic acid, 1,3 Diglycidyl Ethyl-5-methylhydantoin, 1,3 diglycidyl-5 Ethylhydantoin, 1,3 diglycidyl 5,5—tetramethylene hydantoin, 1,3 diglycidyl 5,5 pentamethylene hydantoin, 1,3 diglycidyl 1-5— (4-hydroxybenzyl) Hydantoin,
- specific examples of the compound represented by the formula (19) include, for example, 1,3 diglycidyl 5,5 jetyl barbituric acid, 1,3 diglycidyl roux 5 -loop 5 ethyl barbituric acid 1,3 Diglycidyl 5 Ethyl-5 Isoamyl Barbituric Acid, 1,3 Diglycidyl 5 Aliru 5 Isobutyl Barbituric Acid, 1,3 Diglycidyl-5-aryl-5-isopropylbarbituric acid, 1,3 Diglycidyl-5-j8-bromoallyl 5—sec Butyl barbituric acid, 1,3 diglycidyl 5 ethyl 5— (1 methyl 1 butyl) barbituric acid, 1,3 diglycidyl 5 isopropyl— 5— ⁇ -bromoallyl barbituric acid, 1,3 diglycidyl — 5— (1-Cyclohexyl) —5 ethy
- each of the compounds represented by the formula (18) and the formula (19) can be used alone, or two or more compounds can be used in combination. It can also be used.
- monoallyl isocyanuric acid power is used as the compound of the formula (18)
- terephthalic acid diglycidyl ester is used as the compound of the formula (19)
- 5-jetylbarbituric acid is used as the compound of the formula (18)
- terephthalic acid diglycidyl ester and ethylene glycol diglycidyl ether are used as the compound of the formula (19).
- a polymer compound having a unit structural force of the formula (23) and the formula (24) is basically obtained.
- Specific examples of the compound represented by the formula (20) include the diglycidyl hydantoin compound and the diglycidyl barbituric acid compound in the specific example of the formula (19).
- Examples include diglycidyl isocyanuric acid compounds such as cyanuric acid and monomethyldiglycidyl isocyanuric acid.
- Specific examples of the compound represented by the formula (21) include the hydantoin compound and the barbituric acid compound in the specific example of the formula (18).
- terephthalic acid isophthalic acid, phthalic acid, 2,5 dimethyl terephthalic acid, 2,5 jetyl terephthalic acid, 2, 3, 5, 6-tetrachloroterephthalic acid, 2, 3, 5, 6— Tetrabromoterephthalic acid, 2-troterephthalic acid, 2, 3, 5, 6-tetrafluoroterephthalic acid, 2,5 dihydroxyterephthalic acid, 2,6 dimethylterephthalic acid, 2,5 dichloroterephthalic acid, 2, 3—dichloroisophthalic acid, 3-troisophthalic acid, 2 bromoisophthalic acid, 2 hydroxyisophthalic acid, 3 hydroxyisophthalic acid, 2-methoxyisophthalic acid, 5 phenolisophthalic acid, 3—-trophthalic acid, 3, 4, 5, 6-tetrachloro
- each of the compounds represented by the formula (20) and the formula (21) can be used alone, or two or more compounds can be combined. It can also be used. And, for example, when monoallyl diglycidyl isocyanuric acid power is used as the compound of the formula (20), when 5, 5 jetyl barbituric acid is used as the compound of the formula (21), basically, It is considered that the polymer compound has a repetitive unit structural force of the formula (25).
- the polymer compound contained in the antireflection film-forming composition for lithography of the present invention includes, in addition, polyester, polystyrene, polyimide, acrylic polymer, methallyl polymer, polyvinyl ether, phenol novolak, naphthol novolak, polyether, polyamide, In addition, polymer compounds such as polycarbonate can be used.
- the molecular weight of the polymer compound contained in the antireflection film-forming composition for lithography of the present invention is, for example, 800 to 30000 as a weight average molecular weight (in terms of standard polystyrene), or 1000 to 100,000, or 2000 to 50000, or 3000 to 10000, or 4000 to 8000.
- the proportion of the polymer compound in the solid content of the antireflection film-forming composition for lithography of the present invention is, for example, 50 to 98 mass%, 55 to 90 mass%, or 65 to 80 mass%. % By mass.
- the antireflection film-forming composition for lithography of the present invention contains a crosslinkable compound.
- a crosslinkable compound By using a crosslinkable compound, a crosslinking reaction occurs during firing for forming the antireflection film, and the formed antireflection film has a crosslinked structure.
- the antireflection film becomes strong and has low solubility in the organic solvent used in the photoresist solution applied to the upper layer.
- These crosslinkable compounds can cause a crosslinking reaction by self-condensation.
- the polymer compound contained in the antireflective film composition of the present invention has a hydroxy group, a carboxyl group, or the like, the crosslinkable compound can cause a crosslinking reaction with these groups.
- crosslinkable compound examples include two or more groups capable of crosslinking reaction such as isocyanate group, epoxy group, hydroxymethylamino group, and alkoxymethylamino group, such as 2 to 6 groups.
- a nitrogen-containing compound having a nitrogen atom substituted with a hydroxymethyl group or an alkoxymethyl group can be used.
- a methoxymethyl type melamine compound (trade name: Cymel 300, Cymel 301, Cymel 303, Cymel 350), butoxymethyl type melamine compound manufactured by Nippon Cytec Industries Co., Ltd. (former Mitsui Cytec Co., Ltd.) Products (trade names: My Coat 5 06, My Coat 508), glycoluril compounds (trade names: Cymel 1170, Powder Link 1174), methylated urea resins (trade name: UFR65), butylated urea resins (trade names: UFR30 0, U -VAN10S60, U-VAN10R, U—VAN11HV), Urea Z formaldehyde-based resin manufactured by Dainippon Ink & Chemicals, Inc. (trade name: Beckamine J-300S, Beccamin P-95 5, Beccamin N), etc. There can be mentioned nitrogen-containing compounds.
- the crosslinkable compound is substituted with a hydroxymethyl group or an alkoxymethyl group such as N-hydroxymethylacrylamide, N-methoxymethylmethacrylamide, N-ethoxymethylacrylamide and N-butoxymethylmethacrylamide.
- Polymers produced using the prepared acrylamide compound or methacrylamide compound can be used. Examples of such a polymer include poly (N-butoxymethylacrylamide), a copolymer of N-butoxymethylacrylamide and styrene, a copolymer of N-hydroxymethylmethacrylamide and methylmetatalylate, and N-ethoxy. Examples thereof include a copolymer of methyl methacrylamide and benzyl methacrylate, and a copolymer of N-butoxymethyl acrylamide, benzyl methacrylate and 2-hydroxypropyl methacrylate.
- crosslinkable compound only one kind of compound can be used, or two or more kinds of compounds can be used in combination.
- the proportion of the crosslinkable compound in the solid content of the antireflection film-forming composition for lithography of the present invention is, for example, 1 to 49% by mass, or 8 to 40% by mass, or 15 to 30% by mass. %.
- the antireflection film-forming composition for lithography of the present invention contains a crosslinking catalyst. By using a crosslinking catalyst, the crosslinking reaction is accelerated.
- Examples of the crosslinking catalyst include p-toluenesulfonic acid, trifluoromethanesulfonic acid, pyridinium-P-toluenesulfonic acid, salicylic acid, camphorsulfonic acid, sulfosalicylic acid.
- Sulfonic acid compounds such as 4-chlorobenzene sulfonic acid, 4-hydroxybenzene sulfonic acid, benzenedisulfonic acid, 1-naphthalenesulfonic acid, and pyridinium 1-naphthalenesulfonic acid.
- carboxylic acid compounds such as citrate, benzoic acid, and hydroxybenzoic acid can be used.
- crosslinking catalyst only one kind can be used, or two or more kinds can be used in combination.
- the proportion of the crosslinking catalyst in the solid content of the antireflection film-forming composition for lithography of the present invention is, for example, 0.01 to: LO mass%, or 0.1 to 8 mass%, or 0.5. ⁇ 5% by weight.
- the antireflection film-forming composition for lithography of the present invention contains a sulfonic acid ester compound.
- a sulfonic acid ester compound By using a sulfonic acid ester compound, a rectangular photoresist pattern can be easily formed.
- the sulfonic acid ester compound used is not particularly limited.
- the alkylsulfonic acid ester compound which has a C1-C10 alkyl group is mentioned.
- the alkyl group having 1 to 10 carbon atoms may be substituted with a group selected from a phenyl group, a naphthyl group, an alkoxy group, and a halogen group.
- aromatic hydrocarbon rings such as benzene ring, naphthalene ring, anthracene ring, fluorene ring and naphthacene ring, or aromatics such as pyridine ring, furan ring, quinoline ring, thiophene ring, pyrimidine ring, quinoxaline ring and thiadiazole ring.
- the sulfonic acid ester compound contained in the antireflection film-forming composition for lithography of the present invention can be obtained by a known method.
- a sulfonic acid ester compound can be obtained by reacting a sulfonyl chloride compound with an alcohol compound or a phenol compound in the presence of a base.
- a sulfonic acid ester compound an alkylsulfuryl chloride compound and an aromatic sulfonyl chloride compound can be used.
- the alkylsulfonyl chloride compound is not particularly limited, and examples thereof include an alkylsulfur chloride compound having an alkyl group having 1 to 10 carbon atoms.
- An alkyl group having 1 to 10 carbon atoms is a phenyl group, a naphthyl group, an alkoxy group or the like. Or a group selected from a halogen group and the like.
- alkylsulfuryl chloride compound examples include, for example, methanesulfuryl chloride, trifluoromethanesulfonyl chloride, ethanesulfonyl chloride, benzylsulfonyl chloride, isopropylsulfonyl chloride, camphor-- 10-sulfonyl chloride, 1 octanesulfonyl chloride. And 1H, 1H-perfluorooctanesulfuryl chloride and the like.
- the aromatic sulfonyl chloride compound is not particularly limited, and examples thereof include benzensenorephonino chloride, 4-tonorenenosenorehoninorechloride, 2 2-trobenzenesenorehoninorecolide, 2,5 dichlorobenzenesulfonyl chloride, 1,3 benzenedisulfonyl chloride, 4- (2 phthalimido) phenol sulfochloride, 2, 4, 6 trimethylbenzene sulfochloride, 1, 3, 5 benzene trisulfo 2,3,5,6-tetramethylbenzenesulfonyl chloride, 4 (trifluoromethyl) benzenesulfonyl chloride, pentamethylbenzenesulfonyl chloride, 4 normal propylbenzenesulfonyl chloride, 4 ethylbenzenesulfo- Lucyl chloride, 4-normal butylbenzen
- Examples thereof include sulfonyl chloride compounds having an aromatic heterocycle such as isoquinolinesulfuryl chloride.
- the alcoholic compound and phenolic compound are not particularly limited! /. Reacts with alkylsulfuric liquefied compounds or aromatic sulfhydric liquefied compounds. Alcohol compounds and phenol compounds that can provide an alkyl sulfonate compound or an aromatic sulfonate compound can be used.
- Examples of the alcohol compound include methanol, ethanol, normal pentanol, cyclohexanol, cyclooctanol, decalin 2-ol, 2-ethyl-1-hexanol, 2-ethyl-1,3-hexanediol, 1, Examples include aliphatic alcohol compounds such as 2-cyclohexanediol, 2,2,2-trifluoroethanol, 1H, 1H-perfluoro-1-octanol, 1,2-cyclohexanedimethanol, and 2-tridecanol. .
- aromatic hydrocarbon ring or aromatic heterocycle such as benzyl alcohol, 9-hydroxymethylanthracene, phenylethyl alcohol, 1,2-benzenedimethanol, 2-hydroxymethylthiophene, and 2-naphthalenemethanol.
- Alcohol compound to be used is benzyl alcohol, 9-hydroxymethylanthracene, phenylethyl alcohol, 1,2-benzenedimethanol, 2-hydroxymethylthiophene, and 2-naphthalenemethanol.
- phenol compound examples include phenol, cresol, 2-naphthol, and hydroxyanthracene.
- an aromatic sulfonate ester compound having a structure represented by the formula (7) can be used as the sulfonate ester compound in the composition for forming an antireflective film for lithography of the present invention.
- Ar is an alkyl group having 1 to 6 carbon atoms, and 1 carbon atom.
- R 4 and R each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
- R and R may be bonded to each other to form a ring having 3 to 8 carbon atoms.
- alkyl group examples include a methyl group, an ethyl group, an isopropyl group, a normal hexyl group, and a cyclopentyl group.
- alkoxy group examples include a methoxy group, an ethoxy group, an isopropyloxy group, a normal hexyloxy group, and a cyclopentyloxy group.
- alkoxycarbo yl group include a methoxy carbo ol group, an ethoxy carbo ol group, an isopropyl carboxy carbo yl group, and a cyclopentyl oxy carboxy group.
- the aromatic sulfonate ester compound having the structure represented by the formula (7) includes, for example, a compound having a structure represented by the formula (26) and a compound represented by the formula (27) It can be obtained by the reaction of
- the compound having a structure represented by the formula (26) is an alcohol compound, and various alcohol compounds can be used.
- An aromatic sulfonic acid ester compound having two to four or two to three structures represented by the formula (7) can be used.
- Such a compound can be obtained, for example, by reacting an alcohol compound having 2 to 4 structures of the formula (26) with a compound of the formula (27).
- Examples of the alcoholic compound having 2 to 4 structures of the formula (26) include ethylene glycol, 1,2 propylene glycol, 1,3 propylene glycol, 1,2,3 propanetriol. , Diethylene glycol, triethylene glycol, pentaerythritol, 1,3 benzenedimethanol, 1,4 benzenedimethanol, 1,2 cyclohexanediol, 1,4-cyclohexanediol, 1,3 cyclopentanediol 1, 2-dicyclohexyl, 1, 2-ethanediol, 1,2-diphenyl 2,2-ethanediol, 3,4 furandol, 1,4 dioxane 2,3 diol, 1,4 dioxane 2, 5-diol, trimethylolpropane and the like.
- Examples of the compound of the formula (27) include the above-mentioned benzenesulfuryl chloride compound, naphthalenesulfuryl chloride compound, and anthracenesulfuryl chloride compound.
- An aromatic sulfonic acid ester compound having 2 to 4 structures represented by the formula (7), a compound having a structure represented by the formula (26) and a compound represented by the formula (27) In the case of synthesis by the reaction with, the compound of the formula (27) can be used alone or in combination of two or more.
- aromatic sulfonic acid ester compound used in the antireflection film-forming composition for lithography of the present invention include, for example, 1, 3 bis (p-toluenesulfo-loxy) propane, 1, 2 Bis (p-toluenesulfo-ruxoxy) ethane, 1, 4 Di-o-tosinole 2, 3 o Isop-P-pi !; 1,1,4 dirubis (p-toluenesulfonate), tetra- (p-toluenesulfo-loxymethyl) methane, 1,2-propanediol di-tosylate, 1,2,4 tritosylbutanetriol, 2,3 butane Diol diol p-tosylate, jetylene glycol di-p-tosylate, N, N bis (2- (tosyloxy) ethyl) toluene-4-sulfonamide and
- alkylsulfonate ester compound used in the antireflection film-forming composition for lithography of the present invention include, for example, 1, 4 bis (mesioxy) cyclohexane, 1,4 bis (2,2,2 trifluoroethanesulfo-loxy) cyclohexane, 1,4-bis (trifluoromethanesulfo-loxy) cyclohexane, 1,3 bis (mesyloxy) cyclohexane 1,3 bis (2,2,2 trifluoroethanesulfo-loxy) hexane, 1,3 bis (trifluoromethanesulfo-loxy) cyclohexane, 1,3-bis (2, 2, 2-trifluoroethanesulfo-loxy) propane and the like.
- the sulfonate ester compound used in the composition for forming an antireflective film for lithography of the present invention is preferably not a compound that is easily decomposed by heat.
- the sulfonic acid ester compound a sulfone whose pyrolysis temperature is, for example, 150 ° C or higher, or 170 ° C or higher, or 200 ° C or higher, or 220 ° C or higher, or 250 ° C or higher. Acid ester compounds are preferably used.
- the thermal decomposition temperature is the 10% weight reduction temperature obtained by thermogravimetry, that is, the temperature at which a 10% reduction in the weight of the sulfonate ester compound is observed. From the viewpoint of thermal decomposition temperature, aromatic sulfonate ester compounds are preferably used.
- the sulfonic acid ester compounds may be used alone or in combination of two or more.
- the ratio of the sulfonate ester compound in the solid content of the antireflection film forming composition for lithography of the present invention is, for example, 0.01 to 20% by mass, or 0.1 to 15% by mass. Or 0.5-10% by mass.
- the composition for forming an antireflection film for lithography of the present invention may contain a photoacid generator. Since the photoacid generator generates an acid when the photoresist is exposed, this acid can be used for adjusting the acidity of the antireflection film. This is used as a method for adjusting the acidity of the antireflection film to the acidity of the upper photoresist. In addition, the pattern shape of the photoresist formed in the upper layer can be adjusted by adjusting the acidity of the antireflection film.
- Examples of the photoacid generator include onium salt compounds, sulfonimide compounds, disulfonyl diazomethane compounds, and the like.
- salt compounds include diphenyl-hexohexafluorophosphate, disulfide-lumde-umtrifnoroleolomethanesulphonate, diphloe-ordinomnonafnore rononoremanolebutans Norephonate, diphenylenoreunoperfunoroleono nolemanoleo octane sulfonate, diphenol-nydomcamphorsulfonate, bis (4-tert-butylphenol) iodo-mucamphorsulfonate Bis (4-tert-butylphenol) ododonium trifluoromethanesulfonate and other ododonium salt compounds, and triphenol-norethnoreform hexafnoreo oral antimonate, trifene-nolesnorephonium nonaf noreo Rono Nore Mano Rebutans No
- Examples of the sulfonimide compounds include N- (trifluoromethanesulfo-loxy) succinimide, N- (nonafluoro-normalbutanesulfo-loxy) succinimide, N (camphorsulfo-loxy) succinimide, and N (trifluoro). And romethanesulfuroxy) naphthalimide.
- disulfo-diazomethane compounds include bis (trifluoromethylsulfo) diazomethane, bis (cyclohexylsulfo) diazomethane, bis (phenolsulfo) diazomethane, and bis (p toluenesulfo- E) diazomethane, bis (2,4 dimethylbenzenesulfol) diazomethane, and methylsulfolulu p-toluenesulfol diazomethane.
- photoacid generator Only one photoacid generator can be used, or two or more photoacid generators can be used in combination.
- the content thereof is, for example, 0.01 to 5% by mass in the solid content, or 0.1 to 3% by mass. Or 0.5 to 2% by weight.
- a surfactant, a rheology adjusting agent, an adhesion aid, and the like can be added to the antireflection film-forming composition for lithography of the present invention, if necessary.
- Surfactants are effective in suppressing the occurrence of pinholes and strains.
- the rheology modifier improves the fluidity of the antireflective film-forming composition, and is effective in enhancing the filling property of the antireflective film-forming composition into the holes, particularly in the firing step.
- the adhesion aid improves the adhesion between the semiconductor substrate or the photoresist and the antireflection film, and is particularly effective for suppressing the peeling of the photoresist during development.
- surfactant examples include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene vinyl ether, and polyoxyethylene octyl phenol ether.
- Polyoxyethylene alkylaryl ethers such as polyoxyethylene nonyl phenol ether, polyoxyethylene polyoxypropylene block copolymers, sorbitan monolaurate, sorbitan monopalmitate, sonorebitan monostearate, sorbitan monooleate , Sorbitan trioleate, sorbitan tris Sorbitan fatty acid esters such as tearate, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan tristearate
- Non-ionic surfactants such as polyoxyethylene sorbitan fatty acid esters, such as F-top EF301, EF303, EF352 (manufactured by Gemco Co., Ltd.), product names MegaFuck F171, F173, R—08, R-30 (Dainippon Ink Chemical Co., Ltd.), Fujirad FC430, FC431
- surfactants may be used alone or in combination of two or more.
- the content thereof is from 0.0001 to 5 mass% or from 0.001 to 2 mass% in the solid content.
- any solvent that can dissolve the above-mentioned solid content can be used.
- solvents include, for example, methyl acetate sorb acetate, ethyl acetate sorb acetate, propylene glycol monoureate, propylene glycol monomethyl ether, propylene glycol monomono butylene ether, propylene glycol monomono methinoate etherate, propylene glycol.
- the prepared solution of the antireflective coating resin composition for lithography can be used after being filtered using a filter having a pore size of about 0.2 m to 0.05 / z m.
- the antireflection film resin composition for lithography prepared in this way is excellent in long-term storage stability at room temperature.
- the antireflective film is formed by applying the antireflection film-forming composition of the present invention on a silicon nitride substrate, an ITO substrate, etc.) by an appropriate application method such as a spinner or a coater, and then firing. It is formed.
- the conditions for firing are appropriately selected from firing temperatures of 80 ° C to 250 ° C and firing times of 0.3 to 60 minutes.
- the firing temperature is 150 ° C to 250 ° C
- the firing time is 0.5 to 5 minutes.
- the thickness of the formed antireflection film is, for example, 0.01 to 3. O / zm, preferably, for example, 0.03 to: LO / zm, or 0.05 to 0.5. Or from 0. 05 to 0.
- a photoresist layer is formed on the antireflection film. Formation of the photoresist layer can be performed by a well-known method, that is, by applying a solution of the photoresist composition onto the antireflection film and baking.
- the photoresist formed on the antireflection film of the present invention is not particularly limited as long as it is sensitive to light used for exposure. Either a negative photoresist or a positive photoresist can be used.
- a positive photoresist composed of novolac resin and 1,2-naphthoquinonediazide sulfonic acid ester, a binder having a group that decomposes with acid to increase the alkali dissolution rate, and a chemically amplified photoresist that also has a photoacid generator ability
- Proc. SPIE Vol. 3999, 330- 334 (2000)
- Proc. SPIE Vol. 3999, 357- 364 (2000)
- Proc. SPIE Vol. 3999, 365-374 (2000)
- fluorine-containing atomic polymer-based photoresists as described in 1. above.
- KrF excimer laser (wavelength 248 nm), ArF excimer laser (wavelength 193 nm), F2 excimer laser (wavelength 157 nm), etc. can be used as exposure light.
- post exposure bake can be performed.
- Post-exposure heating is performed at a heating temperature of 70 ° C to 150 ° C. C, heating time is appropriately selected from 0.3 to 10 minutes.
- development is performed with a developer. Thus, for example, when a positive photoresist is used, the exposed portion of the photoresist is removed, and a photoresist pattern is formed.
- Developers include aqueous solutions of alkali metal hydroxides such as potassium hydroxide and sodium hydroxide, tetramethylammonium hydroxide, and tetraethylyl hydroxide.
- alkali metal hydroxides such as potassium hydroxide and sodium hydroxide
- tetramethylammonium hydroxide such as ammonia and choline
- alkaline aqueous solutions such as aqueous amine solutions such as ethanolamine, propylamine, and ethylenediamine.
- a 2.38 mass% aqueous solution of tetramethylammonium hydroxide can be used.
- a surfactant or the like can be added to these developers.
- the development conditions are appropriately selected from a temperature of 5 ° C. to 50 ° C. and a time of 0.1 to 5 minutes.
- the anti-reflection film is removed and the semiconductor substrate is processed using the photoresist pattern formed in this way as a protective film.
- Removal of the anti-reflective coating can be performed using tetrafluoromethane, perfluoronorthobutane, perfluororeopropane, trifluoroethylene, carbon monoxide, argon, oxygen, nitrogen, sulfur hexafluoride, difluoromethane, nitrogen trifluoride and trifluoride. This is performed using a gas such as chlorine chloride.
- a flat film or a gap fill material layer may be formed before the antireflection film is formed.
- the semiconductor substrate to which the composition for forming an antireflection film of the present invention is applied may have an inorganic antireflection film formed on its surface by a CVD method or the like.
- the antireflection film of the present invention can also be formed.
- the antireflection film formed from the composition for forming an antireflection film for lithography of the present invention includes a layer for preventing interaction between the substrate and the photoresist, a material used for the photoresist, or a photoresist.
- the via holes can be filled without any gaps. It can also be used as an embedding material. It can also be used as a flattening material for flattening the surface of an uneven semiconductor substrate.
- Monoallyl diglycidyl isocyanuric acid (manufactured by Shikoku Kasei Kogyo Co., Ltd.) 100 g, 5, 5—Jetylbarbituric acid 66.4 g and benzyltriethyl ammo-um chloride 4. lg dissolved in propylene glycol monomethyl ether And then reacted at 130 ° C. for 24 hours to obtain a solution containing a polymer compound.
- the weight average molecular weight in terms of standard polystyrene was 6800.
- the obtained polymer compound is considered to basically have a repeating unit structural force of the formula (25).
- the solution was filtered using a polyethylene filter having a pore size of 0.10 m, and further filtered using a polyethylene filter having a pore size of 0.05 m to prepare a solution of an antireflection film forming composition for lithography.
- the solution was filtered using a polyethylene filter having a pore size of 0.10 m, and further filtered using a polyethylene filter having a pore size of 0.05 m to prepare a solution of an antireflection film forming composition for lithography.
- Lithography was performed from the solution obtained in Synthesis Example 1 in the same manner as in Example 1 except that the following compounds were used as sulfonic acid ester compounds instead of 1,3-bis (p-toluenesulfo-loxy) propane.
- An antireflection film-forming composition solution was prepared.
- Example 3 4,4, -bis (p-toluenesulfo-loxy) isopropylidenecyclohexa
- Example 4 1,4-di-o-tosyl-2,3-- isopropylidenethreitol
- Example 5 1,3 bis (p-toluenesulfo-loxy) cyclohexane
- Example 6 1, 4-bis (P-toluenesulfo-loxy) cyclohexane
- Example 7 1,4 bis (mesoxy) cyclohexane
- Example 8 1-Benzyloxy 3- (p-tosyloxy) 2 propanol.
- Comparative Example 4 Propylene glycol monomethyl ether 35.4 g, propylene glycol monomethyl ether acetate 18.6 g, 1, 3, 4, 6-tetrakis (methoxymethyl) glycoluril (Nippon Cytec Industries, Ltd.) (Former Mitsui Cytec Co., Ltd.), trade name Powder Link 1174) 0.5 g, 1,3 bis (p-toluenesulfo-loxy) propane, 0.1 lg, was used as a caking solution. Thereafter, the solution was filtered using a polyethylene filter having a pore size of 0.10 m, and further filtered using a polyethylene filter having a pore size of 0.05 m to prepare a solution of the antireflection film forming composition.
- TGZDTA320 manufactured by Seiko Instruments Inc. was used to measure the thermogravimetric decrease behavior while flowing air (flow rate 300mlZ) (temperature increase rate 10 ° CZ min, measurement range) 25-400 ° C), and the 10% weight loss temperature of the sulfonate ester compound was determined.
- the 10% weight loss temperature of each sulfonate compound is as follows. 1,3 Bis (P Toluenesulfo-Luoxy) propane: 280. C, 4, 4, monobis (p-toluenesulfo-loxy) isopropylidenecyclohexane: 170 ° C, 1,4 di-o-tosyl-2, 3- o-isopropylidene threitol: 260.
- the solutions of the antireflective film forming compositions prepared in Examples 1 to 8 and Comparative Examples 1 to 4 were each applied onto a silicon wafer substrate using a spinner.
- the film was baked on a hot plate at 205 ° C. for 1 minute to form an antireflection film (film thickness: 0.10 / zm).
- This antireflection film was immersed in ethyl acetate and propylene glycol monomethyl ether, which are solvents used for photoresist.
- a photoresist solution (trade name: TARF, manufactured by Tokyo Ohka Kogyo Co., Ltd.) is formed on the antireflection film (thickness: 0.23 / zm) formed from the solution of the antireflection film-forming composition prepared in Examples 1-8. 1 P6111) was applied with a spinner.
- a photoresist layer was formed by baking at 130 ° C for 1 minute on a hot plate. After exposure of the photoresist, post-exposure heating was performed at 130 ° C for 1.5 minutes. 2.
- Each of the antireflection film-forming composition solutions prepared in Examples 1 to 8 was applied onto a silicon wafer substrate using a spinner. The film was baked on a hot plate at 205 ° C for 1 minute to form an antireflective film (film thickness 0.06 ⁇ m). Then, using a spectroscopic ellipsometer Ci. A. Woollam, VUV-VASE VU-302), the refractive index (n value) and attenuation coefficient (k value) of these antireflection films at a wavelength of 193 nm were measured. .
- the antireflective films obtained from the antireflective film forming compositions of Examples 3 to 8 had a refractive index of 1.82 and an attenuation coefficient of 0.32.
- the refractive index of the antireflection film obtained from the antireflection film forming composition of Example 2 was 1.69, and the attenuation coefficient was 0.55.
- the antireflective film forming composition solutions prepared in Example 1 and Example 2 were each applied onto a silicon wafer substrate with a spinner.
- An antireflection film was formed by baking on a hot plate at 205 ° C for 1 minute. Then, using RIE system ES401 manufactured by Nippon Scientific Co., Ltd. and using CF as the dry etching gas, these anti-reflections were used.
- the dry etching rate of the stop film was measured.
- a photoresist layer was formed on a silicon wafer substrate using a photoresist solution (product name: PAR710, manufactured by Sumitomo Chemical Co., Ltd.). Then, using RIE system ES401 manufactured by Nippon Scientific Co., Ltd. under the condition that CF is used as the dry etching gas.
- a photoresist solution product name: PAR710, manufactured by Sumitomo Chemical Co., Ltd.
- the lie etching rate was measured. Ratio of dry etching rate of photoresist PAR710 As a result of the comparison, the dry etching rate of the antireflection film obtained in Example 1 was 1.78 times that of the photoregister PAR710. The dry etching rate of the antireflection film obtained from Example 2 was 1.53 times that of the photoresist PAR710.
- Antireflection films were formed on silicon wafer substrates from the solutions of the antireflection film forming compositions prepared in Example 2, Comparative Example 1 and Comparative Example 3, respectively.
- a photoresist layer having a film thickness of 0.24 / zm was formed on these antireflection films using a photoresist solution CFSR (trade name: AR12 21J).
- CFSR photoresist solution
- the cross-sectional shape of the obtained photoresist pattern was observed with a scanning electron microscope.
- the cross-sectional shape of the photoresist pattern formed using Comparative Example 1 and Comparative Example 3 including the sulfonic acid ester compound (1,3-bis (p-toluenesulfo-loxy) propane) is sulfonate compound Compared with the cross-sectional shape of the photoresist pattern formed using Example 1 and Example 2 containing (1,3-bis (p-toluenesulfo-loxy) propane), it has a footing. It was.
- a photoresist pattern was formed in the same manner as described above using the solutions of the antireflection film-forming compositions of Examples 3 to 8 containing the sulfonate compound.
- the cross-sectional shape was rectangular.
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Description
Claims
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CN2005800374579A CN101052919B (zh) | 2004-11-01 | 2005-10-25 | 含磺酸酯的形成光刻用防反射膜的组合物 |
KR1020077012356A KR101239120B1 (ko) | 2004-11-01 | 2005-10-25 | 술폰산 에스테르를 함유하는 리소그라피용 반사방지막형성 조성물 |
EP05805242A EP1813987B1 (en) | 2004-11-01 | 2005-10-25 | Sulfonic-ester-containing composition for formation of antireflection film for lithography |
US11/666,080 US7595144B2 (en) | 2004-11-01 | 2005-10-25 | Sulfonate-containing anti-reflective coating forming composition for lithography |
JP2006543175A JP4697466B2 (ja) | 2004-11-01 | 2005-10-25 | スルホン酸エステルを含有するリソグラフィー用反射防止膜形成組成物 |
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EP (1) | EP1813987B1 (ja) |
JP (1) | JP4697466B2 (ja) |
KR (1) | KR101239120B1 (ja) |
CN (1) | CN101052919B (ja) |
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Cited By (5)
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WO2008047638A1 (fr) * | 2006-10-12 | 2008-04-24 | Nissan Chemical Industries, Ltd. | Procédé de fabrication d'un dispositif semi-conducteur à l'aide d'un film sous-résist durci par photoréticulation |
US20090317740A1 (en) * | 2006-06-19 | 2009-12-24 | Nissan Chemical Industries, Ltd. | Composition containing hydroxylated condensation resin for forming resist underlayer film |
JP2012203393A (ja) * | 2011-03-28 | 2012-10-22 | Jsr Corp | レジスト下層膜形成用組成物、レジスト下層膜及びパターン形成方法 |
WO2013035787A1 (ja) * | 2011-09-08 | 2013-03-14 | 日産化学工業株式会社 | 重合体及びそれを含む組成物並びに接着剤用組成物 |
WO2015163195A1 (ja) * | 2014-04-25 | 2015-10-29 | 日産化学工業株式会社 | レジスト下層膜形成組成物及びそれを用いたレジストパターンの形成方法 |
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US7790356B2 (en) * | 2004-04-09 | 2010-09-07 | Nissan Chemical Industries, Ltd. | Condensation type polymer-containing anti-reflective coating for semiconductor |
JP5378420B2 (ja) * | 2008-02-25 | 2013-12-25 | ハネウェル・インターナショナル・インコーポレーテッド | 加工可能な無機及び有機ポリマー配合物、それらの製造方法及び使用 |
JPWO2010061774A1 (ja) * | 2008-11-27 | 2012-04-26 | 日産化学工業株式会社 | アウトガス発生が低減されたレジスト下層膜形成組成物 |
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CN109415309B (zh) * | 2016-06-16 | 2022-02-25 | 日产化学株式会社 | 磺酸酯化合物及其利用 |
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- 2005-10-25 CN CN2005800374579A patent/CN101052919B/zh active Active
- 2005-10-25 JP JP2006543175A patent/JP4697466B2/ja active Active
- 2005-10-25 US US11/666,080 patent/US7595144B2/en active Active
- 2005-10-25 EP EP05805242A patent/EP1813987B1/en not_active Ceased
- 2005-10-25 WO PCT/JP2005/019612 patent/WO2006049045A1/ja active Application Filing
- 2005-10-25 KR KR1020077012356A patent/KR101239120B1/ko active IP Right Grant
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090317740A1 (en) * | 2006-06-19 | 2009-12-24 | Nissan Chemical Industries, Ltd. | Composition containing hydroxylated condensation resin for forming resist underlayer film |
US8445175B2 (en) * | 2006-06-19 | 2013-05-21 | Nissan Chemical Industries, Ltd. | Composition containing hydroxylated condensation resin for forming resist underlayer film |
WO2008047638A1 (fr) * | 2006-10-12 | 2008-04-24 | Nissan Chemical Industries, Ltd. | Procédé de fabrication d'un dispositif semi-conducteur à l'aide d'un film sous-résist durci par photoréticulation |
US8227172B2 (en) | 2006-10-12 | 2012-07-24 | Nissan Chemical Industries, Ltd. | Method of producing semiconductor device using resist underlayer film by photo-crosslinking curing |
JP2012203393A (ja) * | 2011-03-28 | 2012-10-22 | Jsr Corp | レジスト下層膜形成用組成物、レジスト下層膜及びパターン形成方法 |
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US10202528B2 (en) | 2011-09-08 | 2019-02-12 | Nissan Chemical Industries, Ltd. | Polymer and composition including same, and adhesive composition |
WO2015163195A1 (ja) * | 2014-04-25 | 2015-10-29 | 日産化学工業株式会社 | レジスト下層膜形成組成物及びそれを用いたレジストパターンの形成方法 |
US9910354B2 (en) | 2014-04-25 | 2018-03-06 | Nissan Chemical Industries, Ltd. | Resist underlayer film-forming composition and method for forming resist pattern using the same |
Also Published As
Publication number | Publication date |
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JPWO2006049045A1 (ja) | 2008-05-29 |
EP1813987A4 (en) | 2008-01-16 |
US20080003524A1 (en) | 2008-01-03 |
KR20070084636A (ko) | 2007-08-24 |
CN101052919A (zh) | 2007-10-10 |
KR101239120B1 (ko) | 2013-03-06 |
TW200628992A (en) | 2006-08-16 |
EP1813987A1 (en) | 2007-08-01 |
EP1813987B1 (en) | 2011-08-24 |
TWI418941B (zh) | 2013-12-11 |
JP4697466B2 (ja) | 2011-06-08 |
US7595144B2 (en) | 2009-09-29 |
CN101052919B (zh) | 2011-05-25 |
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