WO2010044372A1 - 重合性アニオンを有する含フッ素スルホン酸塩類とその製造方法、含フッ素樹脂、レジスト組成物及びそれを用いたパターン形成方法 - Google Patents
重合性アニオンを有する含フッ素スルホン酸塩類とその製造方法、含フッ素樹脂、レジスト組成物及びそれを用いたパターン形成方法 Download PDFInfo
- Publication number
- WO2010044372A1 WO2010044372A1 PCT/JP2009/067567 JP2009067567W WO2010044372A1 WO 2010044372 A1 WO2010044372 A1 WO 2010044372A1 JP 2009067567 W JP2009067567 W JP 2009067567W WO 2010044372 A1 WO2010044372 A1 WO 2010044372A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- carbon atoms
- fluorine
- general formula
- substituted
- Prior art date
Links
- 0 C*(C)CC(C)(*)C(O*C(*)(C(F)(F)F)C(F)(F)F)=O Chemical compound C*(C)CC(C)(*)C(O*C(*)(C(F)(F)F)C(F)(F)F)=O 0.000 description 8
- WAUUSHZVQUSQJO-UHFFFAOYSA-N CCC(C(C(OCC(F)(F)S(O)(=O)=O)=O)(F)F)OC(C(C)=C)=O Chemical compound CCC(C(C(OCC(F)(F)S(O)(=O)=O)=O)(F)F)OC(C(C)=C)=O WAUUSHZVQUSQJO-UHFFFAOYSA-N 0.000 description 1
- UCAXDNPYEABXOE-UHFFFAOYSA-N CCC(C(C(OCC)=O)(F)F)OC(C(C)=C)=O Chemical compound CCC(C(C(OCC)=O)(F)F)OC(C(C)=C)=O UCAXDNPYEABXOE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/38—Esters containing sulfur
- C08F220/382—Esters containing sulfur and containing oxygen, e.g. 2-sulfoethyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/03—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C309/07—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton
- C07C309/12—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton containing esterified hydroxy groups bound to the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
- C07C309/01—Sulfonic acids
- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/20—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic unsaturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C381/00—Compounds containing carbon and sulfur and having functional groups not covered by groups C07C301/00 - C07C337/00
- C07C381/12—Sulfonium compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/22—Esters containing halogen
- C08F220/24—Esters containing halogen containing perhaloalkyl radicals
-
- 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
-
- 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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0382—Macromolecular compounds which are rendered insoluble or differentially wettable the macromolecular compound being present in a chemically amplified negative photoresist composition
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
- G03F7/0397—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition the macromolecular compound having an alicyclic moiety in a side chain
-
- 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
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0277—Electrolithographic processes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0046—Photosensitive materials with perfluoro compounds, e.g. for dry lithography
-
- 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
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/1053—Imaging affecting physical property or radiation sensitive material, or producing nonplanar or printing surface - process, composition, or product: radiation sensitive composition or product or process of making binder containing
- Y10S430/1055—Radiation sensitive composition or product or process of making
- Y10S430/106—Binder containing
- Y10S430/108—Polyolefin or halogen containing
-
- 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
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/1053—Imaging affecting physical property or radiation sensitive material, or producing nonplanar or printing surface - process, composition, or product: radiation sensitive composition or product or process of making binder containing
- Y10S430/1055—Radiation sensitive composition or product or process of making
- Y10S430/106—Binder containing
- Y10S430/111—Polymer of unsaturated acid or ester
Definitions
- the present invention relates to novel fluorine-containing sulfonates having a polymerizable anion, a method for producing the same, a fluorine-containing resin, a resist composition, and a pattern forming method using the same.
- excimer lasers such as KrF excimer laser, ArF excimer laser, F 2 excimer laser, etc.
- near-ultraviolet rays far-ultraviolet rays
- extreme ultraviolet rays EUV
- charged particle beams such as electron beams, soft X-rays, X-rays, etc.
- Resist composition that can be suitably used as a chemically amplified resist useful for microfabrication using high-energy rays such as ⁇ -rays and ⁇ -rays, a new fluorine-containing resin that can be used for the resist composition, and used for the synthesis of fluorine-containing resins
- the present invention relates to novel fluorine-containing sulfonates and methods for producing the same.
- ArF immersion lithography has been developed and is now being introduced for 45nm node device fabrication, the next generation.
- double exposure / double patterning technology applying ArF lithography technology, extreme ultraviolet (EUV) lithography, and the like are considered promising.
- a “chemically amplified resist composition” As a resist suitable for such short-wavelength exposure, a “chemically amplified resist composition” has attracted attention. It contains an acid generator (referred to as “photoacid generator”) that generates an acid upon irradiation with high energy rays (referred to as “exposure”), and the resist film is exposed by a reaction using the generated acid as a catalyst. This is a material for changing the solubility of the exposed portion in the developing solution to dissolve the resist film in the exposed portion to form a resist pattern according to the photomask shape.
- photoacid generator an acid generator
- exposure high energy rays
- the photoacid generator in the chemically amplified resist material it is excellent in transparency to high energy rays, has a high quantum yield in acid generation, has a sufficiently strong acid, The boiling point is sufficiently high, and the diffusion distance (referred to as “diffusion length”) of the generated acid in the resist film is appropriate.
- the structure of the anion moiety is important in the ionic photoacid generator, and the nonionic photoacid having a normal sulfonyl structure or sulfonate structure is used.
- the structure of the sulfonyl moiety is important.
- the generated acid is a sufficiently strong acid and the resolution performance as a photoresist is sufficiently high, but the boiling point of the acid is low and the diffusion length of the acid is long. Therefore, there is a drawback that the photomask dependency as a photoresist increases.
- the boiling point of the generated acid is sufficiently high, and the diffusion length of the acid is sufficiently short.
- the acid strength is not sufficient, the resolution performance as a photoresist is not sufficient.
- the photoacid generator for the chemically amplified resist composition for ArF excimer laser those that generate perfluoroalkanesulfonic acid with high acid strength are generally used.
- the derivatives are problematic in terms of stability (non-degradable) derived from C—F bonds, hydrophobicity, and bioaccumulative properties and accumulation properties derived from lipophilicity.
- perfluoroalkanesulfonic acids having 5 or more carbon atoms or derivatives thereof are beginning to raise the above problem.
- a report by the US Environmental Protection Agency (ENVIRONMENTAL PROTECTION AGENCY) proposes to regulate their use.
- Triphenylsulfonium methoxycarbonyldifluoromethanesulfonate Patent Document 1
- (4-methylphenyl) diphenylsulfonyl t-butoxycarbonyldifluoromethanesulfonate Patents) Reference 2
- alkoxycarbonylfluoroalkanesulfonic acid onium salts such as triphenylsulfonium (adamantan-1-ylmethyl) oxycarbonyldifluoromethanesulfonate (Patent Document 3) have been developed as acid generators.
- Patent Document 4 a resin having an acroyloxyphenyldiphenylsulfonium salt as a copolymerization component, and the monomer for the purpose of improving LER in a polyhydroxystyrene resin are used.
- a base resin incorporated as a copolymerization component has been reported (Patent Document 5).
- the sulfonic acid generated by irradiation with high energy rays is the same as the sulfonic acid generated from the conventional photoacid generator, and can satisfy the above problems. is not.
- a sulfonium salt in which an anion side such as polystyrene sulfonic acid is incorporated in a polymer is disclosed (Patent Document 6), and the generated acids are allene sulfonic acid and alkyl sulfone. Since it is an acid derivative and the acid strength of the generated acid is low, it is not sufficient to cleave acid labile groups, particularly acid labile groups of chemically amplified resists using ArF laser light.
- the photoresist film applied and formed on the resist wafer and the lens of the projection exposure apparatus are in contact with an immersion medium such as water. Therefore, the immersion medium may penetrate into the photoresist film, and the resolution of the photoresist may be reduced. Further, there is a problem such as contamination of the lens surface due to dissolution of the constituent components of the photoresist into the immersion medium.
- An object of the present invention is to provide a photoacid generator for preparing a positive or negative photoresist composition. It is another object of the present invention to provide a specific monomer suitable for preparing the photoacid generator, a production method thereof, and a pattern formation method suitable for using a resist composition.
- a resin having an acid labile group and functioning as a positive resist or a resin having a crosslinking site and functioning as a negative resist (“base resin”).
- base resin a resin having a specific fluorine-containing sulfonate structure in the side chain is used as the acid generator.
- the polymer type photoacid generator has a site that functions as a chemically amplified photoacid generator fixed to the side chain of the polymer chain, the acid diffusion distance is substantially limited.
- the DOF is wide and the LER is small
- the present inventors have not yet sufficiently shown the advantages of the polymer type. It was found that the ease of diffusion and the diffusion distance can be adjusted by specifying the chemical structure of the linking group separating the chain and the length of the side chain.
- the present inventors have found a monomer suitable for preparing a resin having a specific fluorine-containing sulfonate structure and a production method thereof. The present invention has been completed based on these findings.
- Z represents a substituted or unsubstituted linear or branched alkylene group having 1 to 6 carbon atoms, or two hydrogen atoms eliminated from this alkylene group and an alicyclic hydrocarbon or aromatic hydrocarbon.
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, or a fluorine-containing alkyl group.
- Z and R are synonymous with Z and R in the general formula (1).
- Q + is a sulfonium cation represented by the following general formula (a) or the following general formula (b), or the following general formula Represents an iodonium cation represented by the formula (c).)
- R 1 , R 2 and R 3 are each independently substituted or unsubstituted linear, branched or cyclic alkyl group, alkenyl group or oxoalkyl group having 1 to 20 carbon atoms, substituted or unsubstituted, Represents an unsubstituted aryl group having 6 to 18 carbon atoms, an aralkyl group, or an aryloxoalkyl group, or any two or more of R 1 , R 2, and R 3 are bonded to each other to form sulfur in the formula
- a ring may be formed with the following general formula (
- R 4 is a substituent such as a carbonyl group, a hydroxyl group, an ester bond, or a lactone ring. , May contain an amino group, an amide group or an ether bond.
- R 4 — (O) p— groups are independent of each other, and R 4 represents a substituted or unsubstituted linear, branched or cyclic alkyl group or alkenyl group having 1 to 20 carbon atoms, Or a substituted or unsubstituted aryl group having 6 to 14 carbon atoms, m is an integer of 1 to 5, and p is 0 or 1.
- a substituent of R 4 a carbonyl group, a hydroxyl group, an ester bond, a lactone ring , May contain an amino group, an amide group or an ether bond.
- a polymerizable fluorine-containing sulfonate represented by the following general formula (3).
- Z and R are synonymous with Z and R in the general formula (1).
- M + represents lithium ion, sodium ion, potassium ion or ammonium ion.
- a resin having a repeating unit represented by the following general formula (4) (In the formula, Z and R are synonymous with Z and R in the general formula (1). Q + is synonymous with Q in the general formula (2).)
- a resin having a repeating unit represented by the following general formula (5) (In the formula, Z and R have the same meanings as Z and R in formula (1)).
- R 5 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or a fluorine-containing alkyl group
- R 6 represents a substituted or unsubstituted linear, branched or cyclic alkylene group, substituted Or an unsubstituted divalent aromatic group, or a divalent organic group in which a plurality of them are linked, and a part thereof may be fluorinated
- R 7 is a hydrogen atom, a substituted or unsubstituted group.
- a resist material containing at least the resins [4] to [12] and a solvent [13] A resist material containing at least the resins [4] to [12] and a solvent.
- a liquid in which the exposure step uses an ArF excimer laser with a wavelength of 193 nm, and water or a liquid other than water having a refractive index higher than that of air is inserted between the substrate coated with the resist material and the projection lens.
- Z and R are .L synonymous with Z and R in the general formula (1) is .M + is representing a hydroxyl group or a halogen atom the same meaning as M + in the general formula (3).
- the polymerizable fluorine-containing sulfonate represented by the general formula (3) is subjected to onium salt exchange using a monovalent onium salt represented by the following general formula (18).
- a method for producing a polymerizable fluorine-containing sulfonic acid onium salt represented by the general formula (2). (Wherein, Y - is a monovalent .Q + is representative of the anion is synonymous with Q + in the general formula (2).)
- the prepared resist composition is a chemically amplified positive type because the sulfonate that functions as a photoacid generator has two fluorine atoms at the ⁇ -position and generates very strong sulfonic acid upon irradiation with high energy rays. Since the acid labile group of the base resin contained in the resist composition or the negative resist composition can be efficiently cleaved or a cross-linked site can be efficiently formed, it is highly sensitive to high energy rays. Become.
- the resist composition prepared from the resin by introducing an acid labile group or a crosslinking site into the resin having the repeating unit represented by the general formula (4) of the present invention uses a base resin separately.
- the ease of diffusion and the diffusion distance can be adjusted, and a pattern having a wide DOF, a small LER, and good shape stability can be formed.
- the polymerizable fluorine-containing sulfonic acid onium salt represented by the general formula (2) includes a carboxylic acid derivative represented by the general formula (16) and a 1,1-difluoro-2-hydroxy represented by the general formula (17).
- Ethanesulfonate is esterified to produce a polymerizable fluorine-containing sulfonate represented by the general formula (3), and the polymerizable fluorine-containing sulfonate (3) is represented by the general formula (18). It can be easily obtained by exchanging an onium salt with a valent onium salt. A sulfonate resin having a repeating unit represented by the general formula (4) of the present invention can be efficiently produced from this polymerizable fluorine-containing sulfonic acid onium salt (2).
- the polymerizable fluorine-containing sulfonic acid or polymerizable fluorine-containing sulfonic acid salt having a structure represented by the general formula (1) of the present invention is a carboxylic acid represented by the general formula (16) as shown in the scheme (1). It can be derived by esterifying an acid derivative and 1,1-difluoro-2-hydroxyethanesulfonate represented by the general formula (17).
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or a fluorine-containing alkyl group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkyl group having 1 to 3 carbon atoms examples include a methyl group, an ethyl group, an n-propyl group, and an i-propyl group.
- fluorine-containing alkyl group having 1 to 3 carbon atoms examples include fluoromethyl group, difluoromethyl group, trifluoromethyl group, 2-fluoroethyl group, 2,2-difluoroethyl group, 2,2,2-trifluoroethyl group Pentafluoroethyl group, 1-methyl-2,2,2-trifluoroethyl group, 1- (trifluoromethyl) -2,2,2-trifluoroethyl group, 1- (trifluoromethyl) -1, Examples include 2,2,2-tetrafluoroethyl group.
- preferable examples of R include a hydrogen atom, a fluorine atom, a methyl group, and a trifluoromethyl group.
- Z represents a substituted or unsubstituted linear or branched alkylene group having 1 to 6 carbon atoms or two alkylene groups and alicyclic hydrocarbons or aromatic hydrocarbons.
- This represents a divalent group obtained by bonding a divalent group obtained by elimination of a hydrogen atom in series.
- the unsubstituted linear or branched alkylene group having 1 to 6 carbon atoms include methylene group, ethylene group, 1,2- or 1,3-propylene group, 1,2-, 1,3- Alternatively, a 1,4-butylene group, a pentamethylene group, a 2,2-dimethyl-1,3-propylene group, a hexamethylene group, and the like can be given.
- substituent of the alkylene group examples include halogen atoms such as fluorine atom, chlorine atom, bromine atom and iodine atom, hydroxyl group and thiol group, aryl group or halogen atom, oxygen atom, nitrogen atom, sulfur atom, phosphorus atom,
- the organic group etc. which contain hetero atoms, such as a silicon atom, can be mentioned.
- a keto group in which two hydrogen atoms on the same carbon of an alkylene group are substituted with one oxygen atom can be exemplified. Any number of these substituents may be present as long as structurally possible.
- Examples of the linear or branched alkylene group having 1 to 6 carbon atoms substituted with the substituent include, for example, a phenylmethylene group, a methoxymethylene group, a methylthiomethylene group, an ethoxymethylene group, a phenoxymethylene group, and a methoxycarbonylmethylene group.
- a divalent group obtained by bonding in series a divalent group obtained by elimination of two hydrogen atoms from an alkylene group and an alicyclic hydrocarbon or aromatic hydrocarbon is-(CR 21 R 22 ) n —B— (CR 21 R 22 ) l —, wherein B is a cyclic group composed of a divalent alicyclic hydrocarbon group or a divalent aromatic hydrocarbon group, and l and n are each independently Represents an integer of 0 to 10, and 1, n is preferably 0 or 1, and either one is more preferably 0.
- R 21 , R 22 , l, and n correspond to the description of the linking group W described later.
- Preferred methylene groups R 21 and R 22 are the substituted or unsubstituted linear or branched alkylene groups having 1 to 6 carbon atoms.
- B is a divalent group obtained by elimination of two hydrogen atoms of an alicyclic hydrocarbon such as substituted or unsubstituted norbornane, adamantane, cyclohexane or cyclopentane, or a substituted or unsubstituted phenylene group.
- substituents examples include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an alkyl group such as a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a 2-fluoroethyl group, 2,2 -Difluoroethyl group, 2,2,2-trifluoroethyl group, pentafluoroethyl group, 1-methyl-2,2,2-trifluoroethyl group, 1- (trifluoromethyl) -2,2,2- Examples thereof include fluorine-containing alkyl groups such as a trifluoroethyl group and 1- (trifluoromethyl) -1,2,2,2-tetrafluoroethyl group. Among these, a methyl group and a trifluoromethyl group are preferable.
- polymerizable fluorine-containing sulfonic acid onium salt examples include a polymerizable fluorine-containing sulfonic acid onium salt represented by the following general formula (2).
- This polymerizable fluorine-containing sulfonic acid onium salt (2) is a monomer or a resin obtained by homopolymerization or copolymerization, and ultraviolet, far ultraviolet, extreme ultraviolet (EUV), electron beam, X-ray, excimer laser, It functions as a photoacid generator because it has the ability to generate sulfonic acid with very high acid strength in response to high energy rays such as ⁇ -rays or synchrotron radiation. It is useful as a monomer for producing a base resin of a resist composition for high energy rays.
- EUV extreme ultraviolet
- Z and R in the general formula (2) are synonymous with Z and R in the general formula (1), and the specific structure can be exemplified again.
- Q + represents a sulfonium cation represented by the following general formula (a) or the following general formula (b), or an iodonium cation represented by the following general formula (c).
- R 1 , R 2 and R 3 are each independently a substituted or unsubstituted linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, an alkenyl group or an oxoalkyl group, Or a substituted or unsubstituted aryl group, aralkyl group or aryloxoalkyl group having 6 to 18 carbon atoms, or any two or more of R 1 , R 2 and R 3 are bonded to each other. You may form a ring with the sulfur atom in it.
- R 1 , R 2 and R 3 include the following.
- a substituted or unsubstituted linear or branched alkyl group having 1 to 20 carbon atoms methyl group, ethyl group, n-propyl group, isopropyl group, cyclopropyl group, n-butyl group, sec-butyl group, Isobutyl group, tert-butyl group, n-pentyl group, cyclopentyl group, n-hexyl group, n-heptyl group, 2-ethylhexyl group, cyclohexyl group, cycloheptyl group, 4-methylcyclohexyl group, cyclohexylmethyl group, n- Examples include octyl group, n-decyl group, 1-adamantyl group, 2-adamantyl group, bicyclo [2.2.1] hepten-2-yl group, 1-adamant
- Examples of the substituted or unsubstituted linear or branched alkenyl group having 1 to 20 carbon atoms include vinyl group, allyl group, propenyl group, butenyl group, hexenyl group, and cyclohexenyl group.
- Examples of the substituted or unsubstituted linear or branched oxoalkyl group having 1 to 20 carbon atoms include 2-oxocyclopentyl group, 2-oxocyclohexyl group, 2-oxopropyl group, 2-oxoethyl group, 2-cyclopentyl.
- Examples include a -2-oxoethyl group, a 2-cyclohexyl-2-oxoethyl group, a 2- (4-methylcyclohexyl) -2-oxoethyl group, and the like.
- Examples of the substituted or unsubstituted aryl group having 6 to 18 carbon atoms include phenyl group, naphthyl group, thienyl group, p-methoxyphenyl group, m-methoxyphenyl group, o-methoxyphenyl group, p-ethoxyphenyl group, Alkoxyphenyl groups such as p-tert-butoxyphenyl group and m-tert-butoxyphenyl group, alkylphenyl groups such as 2-methylphenyl group, 3-methylphenyl group, 4-methylphenyl group and ethylphenyl group, methylnaphthyl Group, alkyl naphthyl group such as ethyl naphthyl group, dialkyl naphthyl group such as diethyl naphthyl group, dialkoxy naphthyl group such as dimethoxy naphthyl group, diethoxy naphthyl group and the like
- Examples of the substituted or unsubstituted aralkyl group having 6 to 18 carbon atoms include a benzyl group, a 1-phenylethyl group, and a 2-phenylethyl group.
- Examples of the substituted or unsubstituted aryloxoalkyl group having 6 to 18 carbon atoms include 2-phenyl-2-oxoethyl group, 2- (1-naphthyl) -2-oxoethyl group, 2- (2-naphthyl) -2- And 2-aryl-2-oxoethyl group such as oxoethyl group.
- R 1 , R 2 and R 3 are bonded to each other to form a cyclic structure via a sulfur atom, 1,4-butylene, 3 -Oxa-1,5-pentylene and the like.
- substituents include aryl groups having a polymerizable substituent such as acryloyloxy group and methacryloyloxy group.
- 4- (acryloyloxy) phenyl group, 4- (methacryloyloxy) phenyl group, 4 -Vinyloxyphenyl group, 4-vinylphenyl group and the like can be mentioned.
- sulfonium cation represented by the general formula (a) include triphenylsulfonium, (4-tert-butylphenyl) diphenylsulfonium, bis (4-tert-butylphenyl) phenylsulfonium, tris (4-tert-butyl).
- triphenylsulfonium (4-tert-butylphenyl) diphenylsulfonium, (4-tert-butoxyphenyl) diphenylsulfonium, tris (4-tert-butylphenyl) sulfonium, (4-tert-butoxycarbonylmethyloxyphenyl) ) Diphenylsulfonium and the like.
- R 4 - ( O) p- group is a independently of one another, R 4 is a substituted or unsubstituted C 1 -C 20 linear, branched or cyclic alkyl group or It represents an alkenyl group or a substituted or unsubstituted aryl group having 6 to 14 carbon atoms.
- R 4 - (O) substituent position of p- group is not particularly limited, 4 or 3-position of the phenyl group are preferred. More preferably, it is the 4th position.
- m represents an integer of 1 to 5, and p represents 0 or 1.
- R 4 may contain a carbonyl group, a hydroxyl group, an ester bond, a lactone ring, an amino group, an amide group, or an ether bond as a substituent.
- R 4 is methyl group, ethyl group, n-hexyl group, n-octyl group, cyclohexyl group, methoxy group, ethoxy group, tert-butoxy group, cyclohexyloxy group, trifluoromethyl group, tri A fluoromethyloxy group and a tert-butoxycarbonylmethyloxy group are preferred.
- sulfonium cation represented by the general formula (b) include (4-methylphenyl) diphenylsulfonium, (4-ethylphenyl) diphenylsulfonium, (4-cyclohexylphenyl) diphenylsulfonium, (4-n-hexylphenyl).
- Diphenylsulfonium, (4-trifluoromethylphenyl) diphenylsulfonium, (4-trifluoromethyloxyphenyl) diphenylsulfonium, (4-tert-butyl) Alkoxycarbonylmethyl oxyphenyl) include sulfonium and the like.
- R 4 - ( O) p- group is a independently of one another, R 4 is a substituted or unsubstituted C 1 -C 20 linear, branched or cyclic alkyl group, or It represents an alkenyl group or a substituted or unsubstituted aryl group having 6 to 14 carbon atoms.
- R 4 - (O) substituent position of p- group is not particularly limited, 4 or 3-position of the phenyl group are preferred. More preferably, it is the 4th position.
- m represents an integer of 1 to 5, and p represents 0 or 1.
- the substituent for R 4 may include a carbonyl group, a hydroxyl group, an ester bond, a lactone ring, an amino group, an amide group, or an ether bond.
- Specific examples of R 4 in the general formula (c) can be the same as R 4 in the general formula (b).
- iodonium cation represented by the general formula (c) include bis (4-methylphenyl) iodonium, bis (4-ethylphenyl) iodonium, bis (4-tert-butylphenyl) iodonium, bis (4- ( 1,1-dimethylpropyl) phenyl) iodonium, (4-methoxyphenyl) phenyliodonium, (4-tert-butoxyphenyl) phenyliodonium, 4- (acryloyloxy) phenylphenyliodonium, 4- (methacryloyloxy) phenylphenyliodonium Among them, bis (4-tert-butylphenyl) iodonium is preferably used.
- the polymerizable fluorine-containing sulfonic acid onium salt compounds represented by the following general formulas (12) and (13) are particularly preferable.
- Z and R in the general formula (3) have the same meanings as Z and R in the general formula (1).
- M + represents lithium ion, sodium ion, potassium ion or ammonium ion.
- ammonium ions include ammonium ion (NH 4 + ), methyl ammonium ion (MeNH 3 + ), dimethyl ammonium ion (Me 2 NH 2 + ), trimethyl ammonium ion (Me 3 NH + ), and ethyl ammonium ion.
- ammonium ions are preferably ammonium ions represented by the following formula (i).
- G 1 , G 2 and G 3 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxyalkyl group having 1 to 6 carbon atoms, or a cycloalkyl group having 3 to 12 carbon atoms.
- trimethylammonium ion (Me 3 NH + ), triethylammonium ion (Et 3 NH + ), and diisopropylethylammonium (n-Pr 2 EtNH + ) are particularly preferable.
- polymerizable fluorine-containing sulfonate compounds represented by the following general formulas (14) and (15) are particularly preferable.
- the polymerizable fluorine-containing sulfonate represented by the general formula (3) includes a carboxylic acid derivative represented by the following general formula (16) and the following general formula (17) as shown in the scheme (1). It can be easily obtained by esterifying the 1,1-difluoro-2-hydroxyethanesulfonic acid salt represented by the formula below by means of a known esterification reaction.
- Z and R in the general formula (16) have the same meanings as Z and R in the general formula (1).
- L represents a hydroxyl group or a halogen atom.
- M + in the general formula (17) is synonymous with M + in the general formula (3).
- the carboxylic acid derivative represented by the general formula (16) is represented by, for example, an acid anhydride or acid halide represented by the general formula (19) and a general formula (20) as shown in the following scheme (2).
- the resulting acid represented by the general formula (21) may be used as it is as the carboxylic acid derivative represented by the general formula (16), or may be chlorinated to give the general formula You may use as a carboxylic acid derivative represented by General formula (16), after converting into the acid chloride represented by (22).
- Z and R are synonymous with Z and R in the general formula (1).
- L ′ represents —O (C ⁇ O) C (R) ⁇ CH 2 group or a halogen atom.
- 1,1-difluoro-2-hydroxyethanesulfonate represented by the general formula (17) reduces ethyl bromodifluoroacetate to 2-bromo-2,2-difluoroethanol, which is converted to pivaloyl chloride. And then converted to 2-bromo-2,2-difluoroethyl pivalate, which is sulfinated to give 1,1-difluoro-2- (pivaloyloxy) ethanesulfinate, Is oxidized to 1,1-difluoro-2- (pivaloyloxy) ethane sulfonate and finally obtained by saponification.
- the carboxylic acid derivative represented by the general formula (16) shown in the scheme (1) is reacted with the 1,1-difluoro-2-hydroxyethanesulfonic acid salt represented by the general formula (17).
- any of the esterification methods known so far can be employed.
- a carboxylic acid represented by the general formula (16) (L is a hydroxyl group) and a 1,1-difluoro-2-hydroxyethane sulfonate represented by the general formula (17) are used as an acid catalyst.
- the carboxylic acid represented by the general formula (16) (L is a hydroxyl group) is used, it is allowed to act on the 1,1-difluoro-2-hydroxyethanesulfonic acid salt represented by the general formula (17).
- the amount of the carboxylic acid represented by the formula (16) is not particularly limited, but is usually 0.1 to 5 mol with respect to 1 mol of 1,1-difluoro-2-hydroxyethanesulfonate. Preferably, the amount is 0.2 to 3 mol, and more preferably 0.5 to 2 mol.
- the amount of the carboxylic acid represented by the general formula (16) is particularly preferably 0.8 to 1.5 mol.
- This esterification reaction can be performed in the presence or absence of a solvent, but it is usually preferable to use an aprotic solvent.
- an aprotic solvent dichloroethane, toluene, ethylbenzene, monochlorobenzene, acetonitrile, N, N-dimethylformamide and the like are used. These solvents may be used alone or in combination of two or more.
- the 1,1-difluoro-2-hydroxyethanesulfonic acid salt represented by the general formula (17) hardly dissolves in aromatic hydrocarbons such as toluene, ethylbenzene, monochlorobenzene and becomes a slurry, Reaction is possible even in the state.
- the reaction temperature is not particularly limited, and is usually in the range of 0 to 200 ° C., preferably 20 to 180 ° C., more preferably 50 to 150 ° C.
- the reaction is preferably carried out with stirring.
- reaction time depends on the reaction temperature, it is usually from several minutes to 100 hours, preferably from 30 minutes to 50 hours, more preferably from 1 to 20 hours, but gas chromatography (GC) It is preferable to use an analytical instrument such as a nuclear magnetic resonance apparatus (NMR) or the like, and to make the reaction end point when the raw material 1,1-difluoro-2-hydroxyethanesulfonate is consumed.
- GC gas chromatography
- NMR nuclear magnetic resonance apparatus
- a catalyst is usually used, and an acid catalyst is preferable.
- the acid catalyst may be selected from known catalysts in the esterification reaction, and an organic acid such as p-toluenesulfonic acid and / or an inorganic acid such as sulfuric acid is used.
- a dehydrating agent may be added to the reaction system, and 1,1 ⁇ -carbonyldiimidazole, N, N ⁇ -dicyclohexylcarbodiimide or the like can be used as the dehydrating agent.
- the amount of the acid catalyst to be used is not particularly limited, but is 0.0001 to 10 mol, preferably 0.001 to 1 mol with respect to 1 mol of 1,1-difluoro-2-hydroxyethanesulfonate.
- the amount is 5 mol, and more preferably 0.01 to 1.5 mol.
- the esterification reaction using an acid catalyst is preferably carried out while dehydrating using a Dean Stark apparatus or the like because the reaction time tends to be shortened.
- the polymerizable fluorine-containing sulfonate represented by the general formula (3) can be obtained by ordinary means such as extraction, distillation, recrystallization and the like. Moreover, it can also refine
- the carboxylic acid halides represented by the general formula (16) are allowed to act on 1,1-difluoro-2-hydroxyethanesulfonate.
- the amount of the carboxylic acid halide to be used is not particularly limited, but is usually 0.1 to 5 moles per mole of 1,1-difluoro-2-hydroxyethanesulfonic acid salt, preferably Is 0.2 to 3 mol, more preferably 0.5 to 2 mol.
- the amount of carboxylic acid halides used is particularly preferably 0.8 to 1.5 mol.
- the reaction may be performed without a solvent or in a solvent inert to the reaction.
- the solvent is not particularly limited as long as it is a reaction-inert solvent.
- the organic solvent include ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone, ester solvents such as ethyl acetate and butyl acetate, ether solvents such as diethyl ether, diethylene glycol dimethyl ether, tetrahydrofuran and dioxane, dichloromethane, chloroform, Halogen solvents such as carbon chloride, 1,2-dichloroethane, tetrachloroethylene, chlorobenzene, orthochlorobenzene, polar solvents such as acetonitrile, N, N-dimethylformamide, N, N-dimethylimidazolidinone, dimethyl sulfoxide,
- the reaction temperature is not particularly limited and is usually in the range of ⁇ 78 to 150 ° C., preferably ⁇ 20 to 120 ° C., and more preferably 0 to 100 ° C.
- reaction time depends on the reaction temperature, it is usually from several minutes to 100 hours, preferably from 30 minutes to 50 hours, more preferably from 1 to 20 hours, but gas chromatography (GC) It is preferable to use an analytical instrument such as a nuclear magnetic resonance apparatus (NMR) or the like, and to make the reaction end point when the raw material 1,1-difluoro-2-hydroxyethanesulfonate is consumed.
- GC gas chromatography
- NMR nuclear magnetic resonance apparatus
- Examples of the acid acceptor include triethylamine, pyridine, picoline, dimethylaniline, diethylaniline, 1,4-diazabicyclo [2.2.2] octane (DABCO), 1,8-diazabicyclo [5.4.0].
- Examples include organic bases such as undec-7-ene (DBU) or inorganic bases such as sodium bicarbonate, sodium carbonate, potassium carbonate, lithium carbonate, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium oxide, etc.
- the amount of the acid acceptor used is not particularly limited, but is 0.05 to 10 mol, preferably 0.1 to 1 mol of 1,1-difluoro-2-hydroxyethanesulfonate. -5 mol, more preferably 0.5-3 mol.
- the polymerizable fluorine-containing sulfonate represented by the general formula (3) can be obtained by ordinary means such as extraction, distillation, recrystallization and the like. Moreover, it can also refine
- the polymerizable fluorine-containing sulfonic acid onium salt represented by the general formula (2) is obtained by replacing the polymerizable fluorine-containing sulfonic acid salt represented by the general formula (3) with the following general formula (18). It can be easily obtained by exchanging an onium salt by a known method for a similar compound using a valent onium salt.
- Q + in general formula (18) is synonymous with Q + in general formula (2), and represents an anion represented by general formula (a), general formula (b), or general formula (c).
- Y ⁇ represents a monovalent anion. Specific examples of Y ⁇ include, for example, F ⁇ , Cl ⁇ , Br ⁇ , I ⁇ , ClO 4 ⁇ , HSO 4 ⁇ , H 2 PO 4 ⁇ , BF 4 ⁇ , PF 6 ⁇ , SbF 6 ⁇ , and aliphatic.
- Examples include sulfonate anion, aromatic sulfonate anion, trifluoromethanesulfonate anion, fluorosulfonate anion, aliphatic carboxylate anion, aromatic carboxylate anion, fluorocarboxylate anion, and trifluoroacetate anion.
- the molar ratio of the monovalent onium salt represented by the general formula (18) to the polymerizable fluorine-containing sulfonate represented by the general formula (3) is usually 0.5 to 10%. It is preferably 0.8 to 2, and more preferably 0.9 to 1.2.
- the reaction solvent is preferably water or an organic solvent such as lower alcohols, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide, and more preferably water, methanol, N, N-dimethylacetamide, acetonitrile, dimethyl sulfoxide and the like are preferable, and water is particularly preferable.
- water and an organic solvent can be used in combination, and the use ratio of the organic solvent in this case is usually 5 parts by mass or more, preferably 100 parts by mass in total of water and the organic solvent.
- the amount of the reaction solvent used is usually 1 to 100 parts by weight, preferably 2 to 100 parts by weight, and more preferably 5 to 50 parts by weight with respect to 1 part by weight of the polymerizable fluorine-containing sulfonate.
- the reaction temperature is usually from 0 to 80 ° C., preferably from 5 to 30 ° C.
- the reaction time is usually from 10 minutes to 16 hours, preferably from 30 minutes to 6 hours, but thin layer chromatography (TLC)
- TLC thin layer chromatography
- NMR nuclear magnetic resonance apparatus
- the thus obtained polymerizable fluorine-containing sulfonic acid onium salt represented by the general formula (2) can be washed with an organic solvent or extracted and purified as necessary.
- the organic solvent is preferably an organic solvent that is not miscible with water, such as esters such as ethyl acetate and n-butyl acetate; ethers such as diethyl ether; alkyl halides such as methylene chloride and chloroform. Further, it can be purified by a method such as recrystallization or column chromatography.
- [Sulfonate resin] A polymerizable fluorine-containing fluorinated sulfonic acid onium salt represented by the general formula (2) having a structure represented by the repeating unit formed by cleavage of the polymerizable double bond, ie, the general formula (1)
- a resin containing a repeating unit formed from a sulfonic acid or a polymerizable fluorine-containing sulfonate (hereinafter also referred to as “sulfonate resin”), specifically, a repeating unit represented by the following general formula (4) is used.
- Z and R have the same meanings as Z and R in the general formula (1)
- Q + has the same meaning as Q + in the general formula (2).
- the resin having a repeating unit represented by the general formula (4) is converted into a resin having a repeating unit represented by the following general formula (5) by exposing the resin with a high energy ray.
- Z and R are synonymous with Z and R in general formula (1).
- High energy rays are not particularly limited, but charged particles such as near ultraviolet rays, far ultraviolet rays, extreme ultraviolet rays (EUV), and electron beams generated by excimer lasers such as KrF excimer laser, ArF excimer laser, F 2 excimer laser, and synchrotron radiation.
- High energy rays such as X-rays, soft X-rays, X-rays, and ⁇ -rays can be exemplified.
- excimer lasers such as KrF excimer laser, ArF excimer laser, F 2 excimer laser, and synchrotron radiation are used.
- the terminal of the repeating unit after the elimination of Q + is difluorosulfonic acid, exhibits very strong acidity, and functions as a photoacid generator for a chemically amplified resist composition. Therefore, the resin having at least the repeating unit represented by the general formula (4) functions as a photoacid generator, and the composition containing at least a resin having a positive or resist type photosensitive solubility change function and a solvent is used as a resist. It can be used as a composition.
- the sulfonate resin may be a sulfonate resin composed of a repeating unit represented by the general formula (4), a repeating unit having an acid labile group or a crosslinking site, and the general formula (4).
- the sulfonate resin can be made of a repeating unit, and any of these can contain other repeating units.
- a repeating unit that does not correspond to any of the repeating unit represented by the general formula (4), the acid labile group, or the repeating unit having a crosslinking site is referred to as a secondary repeating unit.
- a monomer in which a double bond is cleaved to form a secondary repeating unit is referred to as a secondary monomer.
- the sulfonate resin consists only of a repeating unit represented by the general formula (4) obtained by homopolymerizing a polymerizable fluorine-containing sulfonic acid onium salt having a structure represented by the general formula (2).
- a homopolymer may be sufficient and the copolymer containing a secondary repeating unit may be sufficient.
- the sulfonate resin is 0.1 to 100 mol% of a polymerizable fluorine-containing sulfonic acid onium salt having a structure represented by the general formula (2).
- % Preferably 2 to 100 mol%, and more preferably the remainder is a secondary repeating unit. If it is 0.1 mol% or less, it is necessary to use a large amount as a photoacid generator in order to maintain sufficient photosensitivity to high energy rays in the resist composition, which is not preferable.
- the sulfonate resin may be a sulfonate resin composed only of a repeating unit having an acid labile group or a crosslinking site and a repeating unit represented by the general formula (4).
- the repeating unit represented by the general formula (4) is 0.1 to 90 mol%, preferably 0.5 to 50 mol%, more preferably 1 to 30 mol%, and the remainder is an acid labile group.
- it is a repeating unit having a crosslinking site.
- the repeating unit represented by the general formula (4) is less than 0.1 mol%, the photoacid generator does not have sufficient photosensitivity, and a separate photoacid generator is used in combination. This is not preferable because the functionality cannot be fully exhibited.
- the function as a photoacid generator can be sufficiently exerted, but the advantage of intentionally including a repeating unit having an acid labile group or a crosslinking site in the resin is shown. It is not preferable because it cannot be done.
- the sulfonate resin is a sulfonate resin containing a repeating unit having an acid labile group or a crosslinking site and a repeating unit represented by the general formula (4)
- the remaining amount of the sulfonate resin is 0.1 to 70 mol%, preferably 1 to 60 mol%, more preferably 10 to 50 mol%, and the remainder of the sulfonate resin has an acid labile group or a crosslinking site and the general formula (4
- the sulfonate resin having both a photoacid generator and a positive or negative resist function include a repeating unit represented by the general formula (4) / an acid labile group or a repeating portion having a crosslinking site.
- the unit is 1 to 60 mol% / 10 to 85 mol%, preferably 2 to 40 mol / 10 to 70 mol%, more preferably 4 to 30 mol% / 15 to 60 mol%, and the remainder as secondary repeating units.
- the composition range is not limited as in the previous period.
- the molecular weight of the sulfonate resin of the present invention is 1,000 to 1,000,000, preferably 2,000 to 500,000 in terms of mass average molecular weight measured by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- the mass average molecular weight is 1,000 to 100,000, preferably 2,000 to 50,000.
- the resist film may diffuse and move in the resist film during the heat treatment after pattern exposure, and may diffuse to the unexposed area, resulting in degradation of resolution, and the effect as a resin.
- the dispersity (Mw / Mn) is preferably 1.01 to 5.00, more preferably 1.01 to 4.00, particularly preferably 1.01 to 3.00, and most preferably 1.10 to 2.50. preferable.
- the sulfonate resin of the present invention may be a homopolymer or a copolymer with other monomers.
- a monomer having an acid labile group is used as another monomer, a sulfonate resin having a function of changing the photo-solubility that can be used in a positive resist composition is obtained, and a monomer having a crosslinking site.
- a sulfonate resin having a photosensitive solubility changing function that can be used in a negative resist composition is obtained.
- Monomers used for copolymerization are not limited to monomers having such acid labile groups or cross-linked sites.
- sulfonate resins dry etching resistance, standard developer suitability, substrate adhesion, resist
- Various submonomers can be copolymerized for the purpose of adjusting the profile and the general required properties of the resist, such as resolution, heat resistance, and sensitivity.
- Resin having a repeating unit having a positive or negative photosensitive solubility-changing function is a polymerizable fluorine-containing monomer represented by the general formula (2) having a positive or negative photosensitive solubility-changing function. It can be obtained by copolymerizing with sulfonic acid onium salt.
- the sulfonate resin using the photosensitive solubility changing function as a positive resist is a resin having a leaving group such as a carboxyl group or a hydroxyl group protected by an acid labile group in the side chain, and the main chain is a vinyl group.
- a repeating unit formed by cleavage of a polymerizable double bond such as 1-methylvinyl group, 1-fluorovinyl group, 1-trifluoromethylvinyl group, 1-cyanovinyl group, norbornenyl group, etc. And the elimination site are bonded via a linking group W.
- the acid labile group is a group that is released by the action of an acid generated from a photoacid generator or the like to become an acid, and causes a function of increasing the dissolution rate of the resin containing the acid labile group in an alkaline developer.
- Partial structures containing acid labile groups having such functions such as ester structures (— (C ⁇ O) OR X , alkoxycarbonyl groups), ether structures (—O—R X , alkoxy groups) (R X ) Represents an acid labile group.
- the sulfonate resin using the photosensitive solubility changing function as a negative resist is a resin having a crosslinking site such as a hydroxyl group or a carboxyl group in the side chain, and the main chain is a vinyl group, 1-methylvinyl group, It is composed of repeating units formed by cleavage of a polymerizable double bond such as 1-fluorovinyl group, 1-trifluoromethylvinyl group, 1-cyanovinyl group, norbornenyl group, etc. Are connected through.
- a hydroxyl group is an alcoholic hydroxyl group.
- the linking group W linking the elimination site in the positive type or the crosslinking site in the negative type and the main chain is a single bond, — (CR 21 R 22 ) n— (n represents an integer of 1 to 10), —O—. , —C ( ⁇ O) —, —C ( ⁇ O) O— or —O—C ( ⁇ O) —, a divalent alicyclic hydrocarbon group, a divalent aromatic hydrocarbon group, a thioether group, It is a divalent linking group consisting of a single group or a combination thereof selected from the group consisting of an ester group, an amide group, a sulfonamide group, a urethane group, and a urea group.
- B is a cyclic group composed of a divalent alicyclic hydrocarbon group or a divalent aromatic hydrocarbon group, and one more group from the aryl group or alicyclic hydrocarbon group described above for the linking group W.
- l, m and n represent an integer of 0 to 10
- m is preferably 0, and 1 and n are preferably 0 or 1.
- the monovalent organic group represented by R 21 and R 22 of each substituted methylene group is not particularly limited, but is a hydrogen atom, a hydroxyl group, or an alkyl group, an alicyclic hydrocarbon group, a substituted alkyl group, an alkoxy group,
- Both and a plurality of R 21 and R 22 may be the same or different.
- R 21 and R 22 may be combined to form a ring, and this ring is preferably an alicyclic hydrocarbon group.
- the alkyl group has 1 to 30 carbon atoms, preferably 1 to 12 carbon atoms.
- one or more of hydrogen atoms of the alkyl group is an alkoxy group having 1 to 4 carbon atoms, halogen atom, acyl group, acyloxy group, cyano group, hydroxyl group, carboxy group, alkoxycarbonyl
- a fluoroalkyl group substituted with a fluorine atom is preferred, and specific examples include a trifluoromethyl group, a pentafluoroethyl group, 2,2,2-trifluoroethyl, and the like.
- lower fluoroalkyl groups such as n-heptafluoropropyl group, 2,2,3,3,3-pentafluoropropyl group, 3,3,3-trifluoropropyl group and hexafluoroisopropyl group.
- alkoxy group examples include those having 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group, and a butoxy group.
- the aryl group has 1 to 30 carbon atoms.
- the monocyclic group those having 3 to 12 ring carbon atoms are preferable, and those having 3 to 6 ring carbon atoms are more preferable.
- Examples of the condensed polycyclic aromatic group having 1 to 30 carbon atoms include pentalene, indene, naphthalene, azulene, heptalene, biphenylene, indacene, acenaphthylene, fluorene, phenalene, phenanthrene, anthracene, fluoranthene, acephenanthrylene, and acanthrylene.
- Organic groups in which one or more of these hydrogen atoms are substituted with a fluorine atom, an alkyl group having 1 to 4 carbon atoms or a fluorine-containing alkyl group are preferred. It can be mentioned as.
- Examples of the monocyclic or polycyclic heterocyclic group having 3 to 25 ring atoms include pyridyl group, furyl group, thienyl group, pyranyl group, pyrrolyl group, thiantenyl group, pyrazolyl group, isothiazolyl group, isoxazolyl group, Pyrazinyl group, pyrimidinyl group, pyridazinyl group, tetrahydropyranyl group, tetrahydrofuranyl group, tetrahydrothiopyranyl group, tetrahydrothiofuranyl group, 3-tetrahydrothiophene-1,1-dioxide group, etc.
- R a and R b each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- n represents an integer of 2 to 4.
- the alicyclic hydrocarbon group in R 21 and R 22 constituting the linking group W or the alicyclic hydrocarbon group formed including the carbon atom to which they are bonded may be monocyclic or polycyclic. Specific examples include groups having a monocyclo, bicyclo, tricyclo, tetracyclo structure or the like having 3 or more carbon atoms. The number of carbon atoms is preferably 3 to 30, and particularly preferably 3 to 25 carbon atoms. These alicyclic hydrocarbon groups may have a substituent.
- the monocyclic group those having 3 to 12 ring carbon atoms are preferable, and those having 3 to 7 ring carbon atoms are more preferable.
- preferred are a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclodecanyl group, a cyclododecanyl group, and a 4-tert-butylcyclohexyl group.
- polycyclic group examples include adamantyl group having 7 to 15 ring carbon atoms, noradamantyl group, decalin residue, tricyclodecanyl group, tetracyclododecanyl group, norbornyl group, cedrol group and the like.
- the alicyclic hydrocarbon group may be a spiro ring, and preferably a spiro ring having 3 to 6 carbon atoms.
- An adamantyl group, a decalin residue, a norbornyl group, a cedrol group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclodecanyl group, a cyclododecanyl group, a tricyclodecanyl group and the like are preferable.
- One or more of the ring carbons of these organic groups or the hydrogen atoms of the linking group are each independently the above alkyl group or substituted alkyl group having 1 to 25 carbon atoms, hydroxyl group, alkoxy group, carboxyl group, alkoxycarbonyl. And groups in which one or more hydrogen atoms thereof are substituted with a fluorine atom or a trifluoromethyl group.
- a lower alkyl group is preferable, and an alkyl group selected from the group consisting of a methyl group, an ethyl group, a propyl group, and an isopropyl group is more preferable.
- substituent of the substituted alkyl group include a hydroxyl group, a halogen atom, and an alkoxy group.
- alkoxy group include those having 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group, and a butoxy group.
- the alkoxycarbonyl group include a methoxycarbonyl group, an ethoxycarbonyl group, and an isopropoxycarbonyl group.
- the linking group W is —O—, —C ( ⁇ O) —O—, —CH 2 —O—, —C 6 H 4 —O—, —O—CH 2 —, —CH. 2 —C ( ⁇ O) —O—, —C ( ⁇ O) —O—CH 2 —, —CH 2 —O—CH 2 —, —CH 2 —C ( ⁇ O) —O—CH 2 —, —C ( ⁇ O) —O—B— (B represents a cyclic group) and the like, and —C ( ⁇ O) —O—CR 21 R 22 — or —C 6 H 4 —O—CR 21 R 22- .
- R 21 and R 22 are each independently a hydrogen atom, a fluorine atom, an alkyl group, a substituted alkyl group, or an alicyclic hydrocarbon group. These may have one or more hydrogen atoms substituted with fluorine atoms.
- —C ( ⁇ O) —O—CR 21 R 22 — wherein R 21 and R 22 are each independently a hydrogen atom or a lower alkyl group, —C ( ⁇ O) —O—, — C 6 H 4 —O— can be further preferred.
- the acid labile group in the sulfonate resin having the function of changing the photo-solubility of the present invention is an acid labile group represented by any one of the following general formulas (d) to (h).
- (d), (e), and (f) function as a chemical amplification type, they are used as a resist composition applied to a pattern forming method that is exposed with a laser beam or a high energy beam of an electron beam. Particularly preferred.
- R 16 , R 17 , R 18 , R 19 and R 20 each represent a monovalent organic group.
- R 16 represents an alkyl group, an alicyclic hydrocarbon group or an aryl group.
- R 17 represents a hydrogen atom, an alkyl group, an alicyclic hydrocarbon group, an alkenyl group, an aralkyl group, an alkoxy group or an aryl group.
- R 18 , R 19 and R 20 may be the same or different and each represents an alkyl group, an alicyclic hydrocarbon group, an alkenyl group, an aralkyl group or an aryl group. Further, two groups out of R 18 to R 20 may be bonded to form a ring.
- the alkyl group is preferably an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, or a tert-butyl group.
- the hydrocarbon group include those having 3 to 30 carbon atoms, specifically, cyclopropyl group, cyclopentyl group, cyclohexyl group, adamantyl group, norbornyl group, bornyl group, tricyclodecanyl group, dicyclohexane.
- Pentenyl group nobornane epoxy group, menthyl group, isomenthyl group, neomenthyl group, tetracyclododecanyl group, and those having 3 to 30 carbon atoms such as steroid residues are preferable.
- alkenyl group vinyl group, propenyl group, Those having 2 to 4 carbon atoms such as an allyl group and a butenyl group are preferable.
- the aryl group includes a phenyl group and a xylyl group. Toluyl group, cumenyl group, naphthyl group, preferably having from 6 to 14 carbon atoms, such as anthracenyl group, which may have a substituent.
- Examples of the aralkyl group include those having 7 to 20 carbon atoms, which may have a substituent. Examples include a benzyl group, a phenethyl group, and a cumyl group.
- Examples of the substituent further possessed by the organic group include a hydroxyl group, a halogen atom (fluorine, chlorine, bromine, iodine), a nitro group, a cyano group, the alkyl group or alicyclic hydrocarbon group, a methoxy group, and an ethoxy group.
- R a represents an alkyl group having 1 to 4 carbon atoms or a perfluoroalkyl group.
- R b independently represents a hydrogen atom, an alkyl or perfluoroalkyl group having 1 to 4 carbon atoms, a hydroxy group, a carboxylic acid group, an alkyloxycarbonyl group, an alkoxy group, or the like.
- n represents an integer of 1 to 4.
- alkoxycarbonyl group represented by the general formula (d) R 16 —O—C ( ⁇ O) — examples include a tert-butoxycarbonyl group, a tert-amyloxycarbonyl group, a methoxycarbonyl group, an ethoxycarbonyl group, Examples include i-propoxycarbonyl group, cyclohexyloxycarbonyl group, isobornyloxycarbonyl group, adamantaneoxycarbonyl group and the like.
- acetal group represented by the general formula (e) R 16 —O—CHR 17 — include methoxymethyl group, ethoxymethyl group, 1-ethoxyethyl group, 1-butoxyethyl group, 1-isobutoxyethyl.
- tertiary hydrocarbon group represented by the general formula (f) CR 18 R 19 R 20 — include tert-butyl group, tert-amyl group, 1,1-dimethylpropyl group, 1-ethyl-1 -Methylpropyl group, 1,1-dimethylbutyl group, 1-ethyl-1-methylbutyl group, 1,1-diethylpropyl group, 1,1-dimethyl-1-phenylmethyl group, 1-methyl-1-ethyl- 1-phenylmethyl group, 1,1-diethyl-1-phenylmethyl group, 1-methylcyclohexyl group, 1-ethylcyclohexyl group, 1-methylcyclopentyl group, 1-ethylcyclopentyl group, 1-isobornyl group, 1-methyl Adamantyl group, 1-ethyladamantyl group, 1-isopropyladamantyl group, 1-isopropylnorbornyl group, 1-is
- alicyclic hydrocarbon group or the acid labile group containing the alicyclic hydrocarbon group are shown in the following formulas (l-1) and (l-2).
- the methyl group (CH 3 ) may independently be an ethyl group.
- one or more of the ring carbons may have a substituent.
- silyl group represented by the general formula (g) SiR 18 R 19 R 20 — include, for example, trimethylsilyl group, ethyldimethylsilyl group, methyldiethylsilyl group, triethylsilyl group, i-propyldimethylsilyl group, Methyldi-i-propylsilyl group, tri-i-propylsilyl group, tert-butyldimethylsilyl group, methyldi-tert-butylsilyl group, tri-tert-butylsilyl group, phenyldimethylsilyl group, methyldiphenylsilyl group, triphenylsilyl Groups and the like.
- acyl group represented by the general formula (h) R 16 —C ( ⁇ O) — include acetyl group, propionyl group, butyryl group, heptanoyl group, hexanoyl group, valeryl group, pivaloyl group, isovaleryl group, Lauriloyl group, myristoyl group, palmitoyl group, stearoyl group, oxalyl group, malonyl group, succinyl group, glutaryl group, adipoyl group, piperoyl group, suberoyl group, azelaoil group, sebacoyl group, acryloyl group, propioroyl group, methacryloyl group, crotonoyl group , Oleoyl group, maleoyl group, fumaroyl group, mesaconoyl group, camphoroyl group, benzoyl group, phthaloyl group, isophthaloyl group, phthal
- acid labile groups containing a lactone group as a substituent are exemplified by the following formula (m-1), formula (m-2) and formula (m-3).
- the methyl group (CH 3 ) may be independently substituted with an ethyl group.
- examples of the acid labile group include tertiary alkyl groups such as tert-butyl group and tert-amyl group, 1-ethoxyethyl group, 1-butoxyethyl group, Alkoxyethyl groups such as 1-isobutoxyethyl group and 1-cyclohexyloxyethyl group, alkoxymethyl groups such as methoxymethyl group and ethoxymethyl group, and alicyclic hydrocarbon groups such as adamantyl group and isobornyl group described above
- the acid labile group containing an alicyclic hydrocarbon group, the acid labile group containing a lactone, etc. can be mentioned as a preferable thing.
- the sulfonate resin having a function of changing the photo-solubility can be copolymerized with monomers listed below as [other copolymerization components] as other repeating units.
- this [other copolymerization component] shall be 80 mol% or less, 60 mol% or less is more preferable, and 50 mol% or less is further more preferable. If it is 80 mol% or less, the function as a photoacid generator is lowered and sufficient photosensitivity when the standard component ratio of the repeating unit having an acid labile group or a crosslinking site and the repeating unit having a sulfonate is used. Cannot be obtained or sufficient solubility or crosslinkability cannot be obtained.
- the secondary repeating unit can be introduced into the sulfonate resin of the present invention using another copolymerization component (secondary monomer).
- the secondary monomer is not particularly limited, but olefin, fluorine-containing olefin, acrylic ester, methacrylic ester, fluorine-containing acrylic ester, fluorine-containing methacrylate ester, norbornene compound, fluorine-containing norbornene compound, styrenic compound, Examples thereof include fluorine-containing styrene compounds, vinyl ethers, and fluorine-containing vinyl ethers.
- These copolymerization components can be used alone or in combination of two or more.
- acrylic acid esters methacrylic acid esters, fluorine-containing acrylic acid esters, fluorine-containing methacrylate esters, norbornene compounds, fluorine-containing norbornene compounds, styrene compounds, vinyl ethers, and fluorine-containing vinyl ethers are preferred.
- Examples of the olefin include ethylene and propylene, and examples of the fluoroolefin include vinyl fluoride, vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, tetrafluoroethylene, hexafluoropropylene, and hexafluoroisobutene.
- ester side chains can be used without particular limitation, but examples of known compounds include methyl acrylate or methacrylate, ethyl acrylate or methacrylate, n-propyl acrylate or methacrylate, isopropyl Acrylate or methacrylate, n-butyl acrylate or methacrylate, isobutyl acrylate or methacrylate, n-hexyl acrylate or methacrylate, n-octyl acrylate or methacrylate, 2-ethylhexyl acrylate or methacrylate, lauryl acrylate or methacrylate, 2-hydroxyethyl acrylate or methacrylate, 2-hydroxypropyl acrylate or methacrylate Any acrylic acid or alkyl methacrylate of methacrylic acid, ethylene glycol, propylene glycol, acrylate or methacrylate containing tetramethylene glycol groups,
- a fluorine-containing group is an acrylic ester or methacrylic ester having an acrylic ⁇ -position or ester site, and a cyano group is introduced at the ⁇ -position.
- a monomer having a fluorine-containing alkyl group introduced at the ⁇ -position is the above-mentioned non-fluorinated acrylic acid ester or methacrylic acid ester, and the ⁇ -position is a trifluoromethyl group, trifluoroethyl group, nonafluoro- A monomer provided with an n-butyl group or the like is preferably employed.
- the ester moiety is a perfluoroalkyl group, a fluoroalkyl group that is a fluoroalkyl group, or a unit in which an ester moiety coexists with a cyclic structure and fluorine, and the cyclic structure is substituted with, for example, fluorine or a trifluoromethyl group
- Acrylic acid ester or methacrylic acid ester having a unit having a fluorine-containing benzene ring, a fluorine-containing cyclopentane ring, a fluorine-containing cyclohexane ring, a fluorine-containing cycloheptane ring or the like.
- ester of acrylic acid or methacrylic acid in which the ester moiety is a fluorine-containing t-butyl ester group can also be used. If typical examples of such units are exemplified in the form of monomers, 2,2,2-trifluoroethyl acrylate, 2,2,3,3-tetrafluoropropyl acrylate, 1,1 , 1,3,3,3-hexafluoroisopropyl acrylate, heptafluoroisopropyl acrylate, 1,1-dihydroheptafluoro-n-butyl acrylate, 1,1,5-trihydrooctafluoro-n-pentyl acrylate, 1, 1,2,2-tetrahydrotridecafluoro-n-octyl acrylate, 1,1,2,2-tetrahydroheptadecafluoro-n-decyl acrylate, 2,2,2-trifluoroethyl methacrylate, 2,2,3 ,
- the norbornene compound and the fluorine-containing norbornene compound are norbornene monomers having a mononuclear structure or a plurality of nuclear structures, and these can be used without any particular limitation.
- a norbornene compound obtained by performing a Diels-Alder addition reaction using a saturated compound, cyclopentadiene, and cyclohexadiene is preferably used.
- styrene compounds, fluorine-containing styrene compounds, vinyl ethers, fluorine-containing vinyl ethers, allyl ethers, vinyl esters, vinyl silanes, and the like can also be used.
- styrene compounds and fluorine-containing styrene compounds include styrene, fluorinated styrene, hydroxystyrene, styrene compounds to which hexafluoroacetone is added, styrene or hydroxystyrene substituted with hydrogen by a trifluoromethyl group, ⁇
- the above-mentioned styrene or fluorine-containing styrene compound having a halogen, an alkyl group or a fluorine-containing alkyl group bonded to the position can be used.
- vinyl ether, fluorine-containing vinyl ether, allyl ether, vinyl ester and the like can also be used.
- alkyl vinyl ether which may contain a hydroxy group such as a methyl group, an ethyl group, a hydroxyethyl group or a hydroxybutyl group.
- part or all of the hydrogen may be substituted with fluorine.
- cyclohexyl vinyl ether, cyclic vinyl ether having hydrogen or carbonyl bond in its cyclic structure, or a monomer in which part or all of hydrogen of the cyclic vinyl ether is substituted with fluorine can be used. Allyl ether, vinyl ester, and vinyl silane can be used without particular limitation as long as they are known compounds.
- R 5 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or a fluorine-containing alkyl group
- R 6 is a divalent alkylene group which may be linear or branched.
- R 7 is a hydrogen atom, a linear or branched alkyl group having 1 to 20 carbon atoms or a fluorine-containing alkyl group, a cyclic body having an aromatic or alicyclic ring, and may contain a bond of oxygen or carbonyl.
- S represents an integer of 1 to 2.
- R 5 can be used without particular limitation as long as it is a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or a fluorine-containing alkyl group.
- substituents include fluorine, chlorine, bromine and the like as a halogen atom, methyl group, ethyl group, propyl group, isopropyl group and the like as an alkyl group having 1 to 3 carbon atoms, and further having 1 to 3 carbon atoms.
- the fluorine-containing alkyl group include those in which part or all of the hydrogen atoms of the alkyl group are substituted with fluorine atoms.
- R 6 may also be a divalent alkylene group which may have a straight chain or a branch, a divalent alkylene group having a cyclic structure, a divalent aromatic ring, or a divalent organic group in which a plurality of them are linked. If it uses, it can use without a restriction
- a cyclic structure containing a linear or branched alkylene group such as methylene, ethylene, isopropylene, t-butylene, cyclobutylene, cyclohexylene, divalent norbornene, divalent adamantane group, phenylene group, etc. It can be illustrated.
- particularly preferred structures include repeating units represented by the following general formulas (7) to (9).
- R 5 has the same meaning as R 5 in the general formula (6).
- Any one of R 8 , R 9 and R 10 is a CF 3 C (CF 3 ) (OH) CH 2 — group, and the remaining two are hydrogen atoms.
- R 5 has the same meaning as R 5 in the general formula (6).
- R 11 represents a hydrogen atom, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, or Perfluoroethyl group.
- R 5 has the same meaning as R 5 in the general formula (6).
- R 12 represents a methyl group or a trifluoromethyl group
- R 13 is a group containing a hydrogen atom, a linear, branched or cyclic hydrocarbon group having 1 to 25 carbon atoms or an aromatic hydrocarbon group, Some of them may contain a fluorine atom, an oxygen atom, or a carbonyl bond.
- u represents an arbitrary integer of 0 to 2
- t v represents an arbitrary integer of 1 to 8, and satisfies v ⁇ t + 2.
- R 12 ⁇ R 13 is plural, R 12 ⁇ R 13 may be the same or different.
- Examples of the linear, branched or cyclic hydrocarbon group or aromatic hydrocarbon group having 1 to 25 carbon atoms that can be used for R 13 include a methyl group, an ethyl group, a propyl group, an isopropyl group, a cyclopropyl group, n- Propyl, sec-butyl, tert-butyl, n-pentyl, cyclopentyl, sec-pentyl, neopentyl, hexyl, cyclohexyl, ethylhexyl, norbornyl, adamantyl, vinyl, allyl Group, butenyl group, pentenyl group, ethynyl group, phenyl group, benzyl group, 4-methoxybenzyl group and the like, and a part or all of the functional groups may be substituted with fluorine atoms.
- Examples of those containing an oxygen atom include an alkoxycarbonyl group, an acetal group, and an acyl group.
- Examples of the alkoxycarbonyl group include a tert-butoxycarbonyl group, a tert-amyloxycarbonyl group, a methoxycarbonyl group, an ethoxycarbonyl group, Examples thereof include i-propoxycarbonyl group.
- methoxymethyl group methoxyethoxymethyl group, ethoxyethyl group, butoxyethyl group, cyclohexyloxyethyl group, benzyloxyethyl group, phenethyloxyethyl group, ethoxypropyl group, benzyloxypropyl group, phenethyloxypropyl group
- cyclic ethers such as chain ether of ethoxybutyl group and ethoxyisobutyl group, tetrahydrofuranyl group and tetrahydropyranyl group.
- acyl group acetyl group, propionyl group, butyryl group, heptanoyl group, hexanoyl group, valeryl group, pivaloyl group, isovaleryl group, lauryl group, myristoyl group, palmitoyl group, stearoyl group, oxalyl group, malonyl group, succinyl group, Glutaryl group, adipoyl group, piperoyl group, suberoyl group, azelaoil group, sebacoyl group, acryloyl group, propioroyl group, methacryloyl group, crotonoyl group, oleoyl group, maleoyl group, fumaroyl group, mesaconoyl group, canholoyl group, benzoyl group, phthaloyl group Group, isophthaloyl group, terephthaloyl group, naphthoyl group, toluo
- the repeating unit represented by the following general formula (10) is also suitably used as the repeating unit used in addition to the repeating unit represented by the general formula (4). It is done.
- X represents any of —CH 2 —, —O—, and —S—.
- w represents an integer of 2 to 6.
- the repeating unit represented by the following general formula (11) is also used in addition to the repeating unit represented by the general formula (4). It is preferably used as a repeating unit.
- R 5 has the same meaning as R 5 in the general formula (6).
- R 14 is an acid labile group represented by any one of the general formulas (d) to (h).
- R 15 represents a hydrogen atom, a fluorine atom or a fluorine-containing alkyl group.
- the fluorine-containing alkyl group that can be used for R 15 is not particularly limited, but has 1 to 12 carbon atoms, preferably 1 to 3 carbon atoms, and includes a trifluoromethyl group, a pentafluoroethyl group, 2, 2 , 2-trifluoroethyl group, n-heptafluoropropyl group, 2,2,3,3,3-pentafluoropropyl group, 3,3,3-trifluoropropyl group, hexafluoroisopropyl group, etc. it can.
- R 15 is more preferably a fluorine atom or a trifluoromethyl group.
- the resin having the repeating unit represented by the general formula (5) has a high acidity when used as a resist composition, it is used as a dissolution regulator for improving the solubility of a positive type or negative type resist resin. can do.
- the polymerization method of the resin having a repeating unit represented by the general formula (4) of the present invention is not particularly limited as long as it is a generally used method, but radical polymerization, ionic polymerization, etc. are preferable. Coordination anion polymerization, living anion polymerization, cationic polymerization, ring-opening metathesis polymerization, vinylene polymerization, vinyl addition, and the like can also be used.
- Radical polymerization is carried out in the presence of a radical polymerization initiator or a radical initiator by a known polymerization method such as bulk polymerization, solution polymerization, suspension polymerization or emulsion polymerization, and is either batch-wise, semi-continuous or continuous. This can be done by operation.
- a radical polymerization initiator or a radical initiator by a known polymerization method such as bulk polymerization, solution polymerization, suspension polymerization or emulsion polymerization, and is either batch-wise, semi-continuous or continuous. This can be done by operation.
- the radical polymerization initiator is not particularly limited, and examples thereof include azo compounds, peroxide compounds, and redox compounds. Particularly, azobisisobutyronitrile, tert-butyl peroxypivalate, Di-tert-butyl peroxide, i-butyryl peroxide, lauroyl peroxide, succinic acid peroxide, dicinnamyl peroxide, di-n-propyl peroxydicarbonate, tert-butyl peroxyallyl monocarbonate, benzoyl peroxide, Hydrogen peroxide, ammonium persulfate and the like are preferable.
- the reaction vessel used for the polymerization reaction is not particularly limited.
- a polymerization solvent may be used.
- the polymerization solvent those which do not inhibit radical polymerization are preferable, and typical ones are ester systems such as ethyl acetate and n-butyl acetate, ketone systems such as acetone and methyl isobutyl ketone, and hydrocarbons such as toluene and cyclohexane.
- alcohol solvents such as methanol, isopropyl alcohol, and ethylene glycol monomethyl ether. It is also possible to use a solvent such as water, ether, cyclic ether, chlorofluorocarbon, and aromatic.
- the reaction temperature of the copolymerization reaction is appropriately changed depending on the radical polymerization initiator or the radical polymerization initiator, and is usually preferably 20 to 200 ° C, particularly preferably 30 to 140 ° C.
- the resin having the repeating unit represented by the general formula (5) can be produced by the polymerization method of the resin having the repeating unit represented by the general formula (4), but the polymerization represented by the general formula (3).
- the fluorinated sulfonic acid salt can be produced by obtaining a homopolymer or a copolymer by the above polymerization method and hydrolyzing part or all of the protecting group at the sulfonic acid site.
- the resin having a repeating unit represented by the general formula (4) of the present invention is used as a resist composition comprising a solution to which other components are added.
- This resin functions as a photoacid generator, and among them, a resin having a repeating unit having an acid labile group or a crosslinking site can be used alone or as a chemically amplified resist.
- the resin has a repeating unit having an acid labile group or a crosslinking site.
- the resist composition includes a resin (base resin) as an essential component.
- the sulfonate resin can be used in combination with a base resin having no repeating unit represented by the general formula (4).
- the repeating unit represented by the general formula (4) among all the repeating units of the sulfonate resin and the base resin is 0.1 to 50 mol%, and 5 to 30 mol% is preferable, and 1 to 15 mol% is more preferable.
- additives usually used in the resist composition in addition to the solvent for example, additional resins, quenchers, dissolution inhibitors, plasticizers, stability
- additional resins for example, crosslinking agents and basic compounds, such as agents, colorants, surfactants, thickeners, leveling agents, antifoaming agents, compatibilizers, adhesion agents, and antioxidants.
- additives can be included. These additives can be appropriately used as well as those described below.
- the base resin refers to a resin having an acid labile group or a crosslinking site and having a positive or negative resist function.
- the sulfonate resin having the function of changing the photo-solubility is also one form of the base resin.
- the resist composition for chemical amplification generally contains a base resin, a photoacid generator, and a solvent.
- additives such as a basic compound, a dissolution inhibitor, and a crosslinking agent are added as necessary. It can also be added.
- the base resin used in the positive resist composition is a resin having a leaving group such as a carboxyl group or a hydroxyl group protected by an acid labile group in the side chain, and the main chain is acrylic acid, methacrylic acid, ⁇ -trifluoro It is composed of repeating units formed by cleavage of polymerizable double bonds such as methylacrylic acid, vinyl group, allyl group and norbornene group.
- the base resin used in the negative resist composition is a resin having a crosslinking site such as hydroxyl group or carboxyl group in the side chain, and the main chain is acrylic acid, methacrylic acid, ⁇ -trifluoromethylacrylic acid, vinyl group. , Allyl groups, norbornene groups, and the like, and a repeating unit formed by cleavage of a polymerizable double bond.
- the base resin is often a copolymer to adjust the resist characteristics, and various resins have been proposed.
- the copolymerization component acid labile group, crosslinking site, and linking group, the above description of the present specification can be applied as it is.
- a particularly preferred copolymer component is a monomer having a lactone ring, which is useful for enhancing the adhesion of the resist to the substrate.
- These base resins can contain repeating units of the sulfonate resin.
- This base resin also has a function as a photoacid generator possessed by the sulfonate resin, and a positive resist composition can be prepared only from a base resin having an acid labile group and a solvent.
- a negative resist composition can be prepared only from a base resin having a crosslinking site, a crosslinking agent, and a solvent.
- These resist compositions can also be used in combination with a known photoacid generator.
- other additive components that are usually used in the field of resist compositions can be used in combination.
- the molecular weight of the base resin is 1,000 to 1,000,000, preferably 2,000 to 500,000, as a weight average molecular weight measured by gel permeation chromatography (GPC). If the weight average molecular weight is less than 1,000, the strength of the coating film is insufficient, and if it exceeds 1,000,000, the solubility in a solvent is lowered, and it becomes difficult to obtain a smooth coating film, which is not preferable.
- the dispersity (Mw / Mn) is preferably 1.01 to 5.00, more preferably 1.01 to 4.00, particularly preferably 1.01 to 3.00, and most preferably 1.10 to 2.50. preferable.
- Crosslinking agent In the case of a negative resist composition, it can be arbitrarily selected from known crosslinking agents used in chemically amplified negative resist compositions.
- amino group-containing compounds such as melamine, acetoguanamine, benzoguanamine, urea, ethylene urea, propylene urea, glycoluril are reacted with formaldehyde or formaldehyde and a lower alcohol, and the hydrogen atom of the amino group is converted into a hydroxymethyl group or Examples include compounds substituted with a lower alkoxymethyl group.
- those using melamine are melamine-based crosslinking agents
- those using urea are urea-based crosslinking agents
- those using alkylene ureas such as ethylene urea and propylene urea are alkylene urea-based crosslinking agents
- glycoluril is used.
- the component (C) is preferably at least one selected from the group consisting of melamine-based crosslinking agents, urea-based crosslinking agents, alkylene urea-based crosslinking agents, and glycoluril-based crosslinking agents, and glycoluril-based crosslinking agents are particularly preferred. preferable.
- melamine-based crosslinking agent examples include hexamethoxymethyl melamine, hexaethoxymethyl melamine, hexapropoxymethyl melamine, hexabutoxybutyl melamine and the like, and among them, hexamethoxymethyl melamine is preferable.
- urea-based crosslinking agent examples include bismethoxymethylurea, bisethoxymethylurea, bispropoxymethylurea, bisbutoxymethylurea, etc. Among them, bismethoxymethylurea is preferable.
- alkylene urea crosslinking agent examples include mono and / or dihydroxymethylated ethylene urea, mono and / or dimethoxymethylated ethylene urea, mono and / or diethoxymethylated ethylene urea, mono and / or dipropoxymethylated ethylene Ethylene urea crosslinking agents such as urea, mono and / or dibutoxymethylated ethylene urea; mono and / or dihydroxymethylated propylene urea, mono and / or dimethoxymethylated propylene urea, mono and / or diethoxymethylated propylene urea Propylene urea-based crosslinking agents such as mono- and / or dipropoxymethylated propylene urea, mono and / or dibutoxymethylated propylene urea; 1,3-di (methoxymethyl) 4,5-dihydroxy-2-imidazolidinone 1,3-di (methoxymethyl) ) -4,5-like and dimethoxy-2
- glycoluril-based crosslinking agent examples include mono, di, tri and / or tetrahydroxymethylated glycoluril, mono, di, tri and / or tetramethoxymethylated glycoluril, mono, di, tri and / or tetraethoxymethyl.
- Glycoluril mono, di, tri and / or tetrapropoxymethylated glycoluril, mono, di, tri and / or tetrabutoxymethylated glycoluril.
- the crosslinking agent component one kind may be used alone, or two or more kinds may be used in combination.
- the content of the entire crosslinking agent component in the negative resist composition of the present invention is preferably 3 to 30 parts by mass, more preferably 3 to 25 parts by mass, and most preferably 5 to 20 parts by mass with respect to 100 parts by mass of the base resin. preferable.
- the content of the crosslinking agent component is at least the lower limit value, the crosslinking formation proceeds sufficiently and a good resist pattern can be obtained.
- it is below this upper limit the storage stability of the resist coating solution is good, and the deterioration of sensitivity with time is suppressed.
- Base compounds In the resist composition of the present invention, it is preferable to add a basic compound as an optional component as a quencher or in order to improve the resist pattern shape, stability with time, and the like.
- This basic compound component may be a known one, for example, primary, secondary, tertiary aliphatic amines, aromatic amines, heterocyclic amines, nitrogen-containing compounds having a hydroxyphenyl group, alcohols Nitrogenous compounds, amide derivatives and the like can be used, among which secondary aliphatic amines, tertiary aliphatic amines, aromatic amines and heterocyclic amines are preferred.
- Examples of the aliphatic amine include alkyl amines or alkyl alcohol amines in which at least one hydrogen atom of ammonia NH 3 is substituted with an alkyl group having 12 or less carbon atoms or a hydroxyalkyl group.
- monoalkylamines such as n-hexylamine, n-heptylamine, n-octylamine, n-nonylamine, n-decylamine; diethylamine, di-n-propylamine, di-n-heptylamine, Dialkylamines such as di-n-octylamine and dicyclohexylamine; trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine, tri-n-hexylamine, tri-n-pentylamine, tri-n-heptyl Trialkylamines such as amine, tri-n-octylamine, tri-n-nonylamine, tri-n-decanylamine, tri-n-dodecylamine; diethanolamine, triethanolamine, diisopropanolamine, triisopropanolamine, di-n -Ok Nor
- examples of other basic compounds include the following compounds.
- aromatic amines and heterocyclic amines include aniline, N-methylaniline, N-ethylaniline, N-propylaniline, N, N-dimethylaniline, 2-methylaniline, 3-methylaniline, 4-methyl.
- an optional component such as organic carboxylic acid or phosphorus is used for the purpose of preventing sensitivity deterioration due to the blending of the basic compound component, and for improving the resist pattern shape, stability over time, etc.
- Oxo acids or their derivatives can be included.
- these can also be used together with a basic compound component, and any one can also be used.
- organic carboxylic acid for example, malonic acid, citric acid, malic acid, succinic acid, benzoic acid, salicylic acid and the like are suitable.
- Phosphorus oxoacids or derivatives thereof include phosphoric acid, phosphoric acid di-n-butyl ester, phosphoric acid diphenyl ester and other phosphoric acid or derivatives thereof such as phosphonic acid, phosphonic acid dimethyl ester, phosphonic acid- Like phosphonic acids such as di-n-butyl ester, phenylphosphonic acid, phosphonic acid diphenyl ester, phosphonic acid dibenzyl ester and their esters, phosphinic acids such as phosphinic acid, phenylphosphinic acid and their esters Among these, phosphonic acid is particularly preferable.
- the solvent is not particularly limited as long as the fluorine-containing polymer compound is soluble, and various organic solvents can be used.
- Organic solvents include acetone, methyl ethyl ketone, cyclohexanone, methyl isoamyl ketone, 2-heptanone and other ketones, ethylene glycol, ethylene glycol monoacetate, diethylene glycol, diethylene glycol monoacetate, propylene glycol, propylene glycol monoacetate, propylene glycol monomethyl ether, Polypropylene and its derivatives such as dipropylene glycol or monomethyl ether, monoethyl ether, monopropyl ether, monobutyl ether or monophenyl ether of dipropylene glycol monoacetate, cyclic ethers such as dioxane and methyl lactate , Ethyl lactate, methyl acetate, ethyl acetate, butyl acetate, methyl pyruvate, eth
- the resist composition of the present invention is a surfactant, preferably a fluorine-based and / or silicon-based surfactant (a fluorine-containing surfactant and a silicon-based surfactant, a surfactant containing both fluorine atoms and silicon atoms). It is preferable to contain any one of 2) or 2 types or more.
- the resist composition of the present invention contains the surfactant, it is particularly effective when using an exposure light source of 250 nm or less, particularly 220 nm or less, and when the pattern line width is narrower, and has good sensitivity and resolution. Thus, it is possible to provide a resist pattern with less adhesion and development defects.
- a known photoacid generator can be used in combination with the sulfonate resin.
- the photoacid generator an arbitrary one can be selected from those used as the acid generator of the chemically amplified resist.
- acid generators include bissulfonyldiazomethanes, nitrobenzyl derivatives, onium salts, halogen-containing triazine compounds, cyano group-containing oxime sulfonate compounds, and other oxime sulfonate compounds.
- These photoacid generators may be used alone or in combination of two or more, and the content thereof is 100 parts by mass of the resist composition together with the sulfonate resin of the present invention.
- the sulfonate resin of the present invention is 1 to 100 parts by mass of the total mass of the photoacid generator of 100 parts by mass, preferably 10 to 100 parts by mass, more preferably 30 to 100 parts by mass. preferable.
- the additional resin is not particularly limited as long as it is a resin that dissolves in the solvent used and is compatible with the components constituting the other resist composition.
- the resist composition of the present invention can be used for forming a resist pattern by a conventional photoresist technique. That is, first, a resist composition solution is applied to a substrate such as a silicon wafer using a spinner and dried to form a photosensitive layer, and a high energy beam or an electron beam is applied to the substrate by using an exposure apparatus or the like. Irradiate and heat through mask pattern. Next, this is developed with a developer, for example, an alkaline aqueous solution such as an aqueous solution of 0.1 to 10% by mass of tetramethylammonium hydroxide. With this forming method, a pattern faithful to the mask pattern can be obtained.
- a developer for example, an alkaline aqueous solution such as an aqueous solution of 0.1 to 10% by mass of tetramethylammonium hydroxide.
- additives that are miscible with the resist composition as desired such as additional resins, quenchers, plasticizers, stabilizers, colorants, surfactants, thickeners, leveling agents, antifoaming agents, compatibilizing agents.
- additives such as an adhesive and an antioxidant can be contained.
- the high energy beam used in the resist pattern forming method of the present invention is not particularly limited. However, particularly when fine processing is performed, near ultraviolet rays (wavelength 380 to 200 nm) such as F 2 excimer laser, ArF excimer laser, KrF excimer laser, or the like. Vacuum ultraviolet rays (far ultraviolet rays, VUV, wavelength 200 to 10 nm), extreme ultraviolet rays such as synchrotron radiation (EUV, wavelength 10 nm or less), soft X-rays, X-rays or ⁇ rays, etc. An electron beam is effective. An exposure apparatus provided with such a high-energy ray or electron beam source having a short wavelength of 300 nm or less is preferably used.
- the resist composition of the present invention enables more efficient fine processing at a numerical aperture and an effective wavelength by using a medium that absorbs high energy rays, such as water or a fluorine-based solvent, in a part of the optical path. It is also suitable for use in an immersion exposure apparatus.
- the reaction solution was separated into an organic layer and an aqueous layer, the organic layer was distilled off of acetonitrile, and 100 mL of dichloromethane was added to form a dichloromethane solution.
- the aqueous layer was extracted with 50 mL of dichloromethane and combined with the organic layer.
- the obtained organic layer was washed with 10% aqueous sodium thiosulfate solution, water and brine, and dichloromethane was distilled off to obtain 111.4 g of triethylammonium 2-pivaloyloxy-1,1-difluoroethanesulfinate in a yield of 76. %, Purity 83%.
- reaction solution was washed with 10 g of diisopropyl ether, and the resulting aqueous layer was washed with dilute hydrochloric acid, extracted twice with diisopropyl ether, removed water with magnesium sulfate, filtered, and then diisopropyl ether was distilled off. 0.19 g of the desired methacrylic acid 1-hydroxycarbonyl-1,1-difluoro-2-butyl ester was obtained. At this time, the purity was 78% and the yield was 27%.
- a resin was produced by the following procedure using the synthesized polymerizable monomer.
- the structures and abbreviations of the polymerizable monomers used are shown below.
- the polymerization solution was cooled with water to 30 ° C. or less, and poured into 2 kg of methanol, and the precipitated white powder was separated by filtration.
- the filtered white powder was washed twice with 400 g of methanol in the form of a slurry, filtered, and dried at 50 ° C. for 17 hours to obtain a white powder polymer (73 g).
- This polymer has a MW of 8,800, and as a result of 13 C-NMR analysis, the repeating unit derived from compound (PAG-1): the repeating unit derived from compound (B-1): derived from compound compound (C-1) The content ratio of the repeating unit was 5.2: 44.9: 49.9 (mol%).
- This copolymer was designated as resin P-1.
- the polymerization solution was cooled with water to 30 ° C. or less, and poured into 2 kg of methanol, and the precipitated white powder was separated by filtration.
- the filtered white powder was washed twice as a slurry with 400 g of methanol and then filtered and dried at 50 ° C. for 17 hours to obtain a white powder polymer (56.9 g).
- This polymer has a MW of 8,400, and as a result of 13 C-NMR analysis, the repeating unit derived from the compound (PAG-2): the repeating unit derived from the compound (B-1): derived from the compound compound (C-1) The content ratio of the repeating unit was 5.4: 44.7: 49.9 (mol%).
- This copolymer was designated as resin P-2.
- the solvent, basic compound, and crosslinking agent used in each example are as follows.
- S-1 Propylene glycol monomethyl ether acetate (PGMEA)
- S-2 ⁇ -butyrolactone
- S-3 ethyl lactate
- S-4 cyclohexanone
- O-1 N, N-dibutylaniline
- O-2 2,6-diisopropylaniline
- O-3 diazabicyclo [4.3.0]
- O-5 Trioctylamine
- Nicalac MX-270 glycol-based cross-linking agent, Sanwa Chemical product
- the resin having the fluorine-containing sulfonic acid onium salt of the present invention in the side chain includes a positive resist resin having an acid labile group or a negative resist resin having a crosslinking site, an acid generator and a solvent (negative type).
- a resist composition containing at least a crosslinking agent in some cases, it effectively functions as a photoacid generator, has excellent resolution, wide depth of focus (DOF), and line edge roughness ("LER").
- DOE line edge roughness
- Is small, and a highly sensitive resist composition can be provided.
- the specific monomer suitable for preparing the photo-acid generator, its manufacturing method, and the pattern formation method suitable for using the said resist composition can be provided.
- the sulfonate resin of the present invention can be used as a photoacid generator for photoresists and as a positive type or negative type resist resin itself, and a monomer for synthesizing these resins or an intermediate thereof is another compound. It is also useful as a synthetic raw material.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Materials For Photolithography (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
本発明の一般式(1)で表される構造を有する重合性含フッ素スルホン酸もしくは重合性含フッ素スルホン酸塩は、スキーム(1)に示すように、一般式(16)で表されるカルボン酸誘導体と、一般式(17)で表される1,1-ジフルオロ-2-ヒドロキシエタンスルホン酸塩とをエステル化することによって誘導することができる。
本発明の一般式(1)で表される構造を有する重合性含フッ素スルホン酸塩として、下記一般式(2)で表される重合性含フッ素スルホン酸オニウム塩が挙げられる。この重合性含フッ素スルホン酸オニウム塩(2)は、単量体または単独重合もしくは共重合して得られた樹脂が紫外線、遠紫外線、極端紫外線(EUV)、電子線、X線、エキシマレーザー、γ線、又はシンクロトロン放射光などの高エネルギー線に感応して非常に酸強度の大きいスルホン酸を発生する能力を有することから光酸発生剤として機能すると共に、酸不安定性基または架橋部位を有する単量体と共重合することができ、高エネルギー線用レジスト組成物のベース樹脂を製造するための単量体としても有用である。
一般式(a)において、R1、R2及びR3は相互に独立に置換もしくは非置換の炭素数1~20の直鎖状、分岐状または環状のアルキル基、アルケニル基又はオキソアルキル基、又は置換もしくは非置換の炭素数6~18のアリール基、アラルキル基又はアリールオキソアルキル基を表すか、あるいはR1、R2及びR3のうちのいずれか2つ以上が相互に結合して式中の硫黄原子と共に環を形成してもよい。
一般式(b)において、R4-(O)p-基は相互に独立であって、R4は置換もしくは非置換の炭素数1~20の直鎖状、分岐状又は環状のアルキル基もしくはアルケニル基、又は置換もしくは非置換の炭素数6~14のアリール基を表す。R4-(O)p-基の置換基位置は特に限定されるものではないが、フェニル基の4位あるいは3位が好ましい。より好ましくは4位である。mは1~5の整数、pは0又は1を表す。R4は置換基としてカルボニル基、ヒドロキシル基、エステル結合、ラクトン環、アミノ基、アミド基、エーテル結合を含んでいてもよい。
一般式(c)において、R4-(O)p-基は相互に独立であって、R4は置換もしくは非置換の炭素数1~20の直鎖状、分岐状又は環状のアルキル基又はアルケニル基、又は置換もしくは非置換の炭素数6~14のアリール基を表す。R4-(O)p-基の置換基位置は特に限定されるものではないが、フェニル基の4位あるいは3位が好ましい。より好ましくは4位である。mは1~5の整数、pは0又は1を表す。R4の置換基としてカルボニル基、ヒドロキシル基、エステル結合、ラクトン環、アミノ基、アミド基、エーテル結合を含んでいてもよい。一般式(c)におけるR4の具体例は上述した一般式(b)におけるR4と同じものを再び挙げることができる。
本発明の重合性含フッ素スルホン酸塩(1)の1つである、重合性含フッ素スルホン酸オニウム塩(2)を製造するための原料として、下記一般式(3)で表されるスルホン酸塩は有用である。
一般式(2)で表される重合性含フッ素スルホン酸オニウム塩及び一般式(3)で表される重合性含フッ素スルホン酸塩の製造方法は下記の通りである。
Y-は1価のアニオンを表す。Y-の具体例としては、例えば、F-、Cl-、Br-、I-、ClO4 -、HSO4 -、H2PO4 -、BF4 -、PF6 -、SbF6 -、脂肪族スルホン酸アニオン、芳香族スルホン酸アニオン、トリフルオロメタンスルホン酸アニオン、フルオロスルホン酸アニオン、脂肪族カルボン酸アニオン、芳香族カルボン酸アニオン、フルオロカルボン酸アニオン、トリフルオロ酢酸アニオン等を挙げることができ、好ましくは、Cl-、Br-、HSO4 -、BF4 -、脂肪族スルホン酸イオン等であり、さらに好ましくは、Cl-、Br-、HSO4 -である。
一般式(2)で表される重合性含フッ素スルホン酸オニウム塩の重合性二重結合が開裂して形成される繰り返し単位、すなわち一般式(1)で表される構造を有する重合性含フッ素スルホン酸もしくは重合性含フッ素スルホン酸塩から形成される繰り返し単位を含む樹脂(以下、「スルホン酸塩樹脂」ともいう)として、具体的には下記一般式(4)で表される繰り返し単位を有する樹脂を例示できる。
ポジ型における脱離部位またはネガ型における架橋部位と主鎖を繋ぐ連結基Wは、単結合、-(CR21R22)n-(nは1~10の整数を表す。)、-O-、-C(=O)-、-C(=O)O-もしくは-O-C(=O)-、二価の脂環式炭化水素基、二価の芳香族炭化水素基、チオエーテル基、エステル基、アミド基、スルフォンアミド基、ウレタン基、又はウレア基よりなる群から選択される単独あるいはこれらの組み合わせからなる二価の連結基である。
本発明の感光溶解性変化機能を有するスルホン酸塩樹脂における酸不安定性基は、下記一般式(d)~(h)のいずれかで表される酸不安定性基である。これらのうち、(d)、(e)、(f)は化学増幅型として機能するので、レーザー光や電子線の高エネルギー線で露光するパターン形成方法に適用するレジスト組成物として使用するのに特に好ましい。
本発明のスルホン酸塩樹脂には、上述の通り、他の共重合成分(従単量体)を使用して従繰り返し単位を導入することができる。従単量体としては、特に限定されないが、オレフィン、含フッ素オレフィン、アクリル酸エステル、メタクリル酸エステル、含フッ素アクリル酸エステル、含フッ素メタクリル酸エステル、ノルボルネン化合物、含フッ素ノルボルネン化合物、スチレン系化合物、含フッ素スチレン系化合物、ビニルエーテル、および含フッ素ビニルエーテルなどが挙げられる。これらの共重合成分は単独で又は2種以上を組み合わせて使用できる。これらのうち、アクリル酸エステル、メタクリル酸エステル、含フッ素アクリル酸エステル、含フッ素メタクリル酸エステル、ノルボルネン化合物、含フッ素ノルボルネン化合物、スチレン系化合物、ビニルエーテル、および含フッ素ビニルエーテルが好ましい。
本発明の一般式(4)で表される繰り返し単位を有する樹脂の重合方法としては、一般的に使用される方法であれば特に制限されないが、ラジカル重合、イオン重合などが好ましく、場合により、配位アニオン重合、リビングアニオン重合、カチオン重合、開環メタセシス重合、ビニレン重合、ビニルアディションなどを使用することも可能である。
本発明の一般式(4)で表される繰り返し単位を有する樹脂は、その他の成分を添加した溶液からなるレジスト組成物として使用される。この樹脂は光酸発生剤として機能し、そのうち、酸不安定性基または架橋部位を有する繰り返し単位をあわせ有する樹脂は単独でも化学増幅型レジストとして使用できる。また、酸不安定性基または架橋部位を有する繰り返し単位の何れをも有しない一般式(4)で表される繰り返し単位を有する樹脂の場合は、酸不安定性基または架橋部位を有する繰り返し単位を有する樹脂(ベース樹脂)を必須成分として含んでレジスト組成物は構成される。さらに、スルホン酸塩樹脂は一般式(4)で表される繰り返し単位を有しないベース樹脂と併用することもできる。スルホン酸塩樹脂またはそれを併用する場合は、スルホン酸塩樹脂とベース樹脂の全ての繰り返し単位のうち、一般式(4)で表される繰り返し単位を0.1~50モル%とし、0.5~30モル%が好ましく、1~15モル%がより好ましい。一般式(4)で表される繰り返し単位を併用する場合、溶剤のほかにレジスト組成物に通常使用される各種の添加剤、例えば、付加的樹脂、クエンチャー、溶解抑制剤、可塑剤、安定剤、着色剤、界面活性剤、増粘剤、レベリング剤、消泡剤、相溶化剤、密着剤、酸化防止剤など、ネガ型レジスト組成物の場合はさらに架橋剤、塩基性化合物などの種々添加剤を含有させることができる。これらの添加剤は、以下に説明するものの他、公知のものを適宜使用できる。
本明細書において、ベース樹脂とは、酸不安定性基または架橋部位を有しポジ型またはネガ型のレジスト機能を有する樹脂をいう。前記感光溶解性変化機能を有するスルホン酸塩樹脂もベース樹脂の一形態である。
ネガ型レジスト組成物の場合、化学増幅型のネガ型レジスト組成物に用いられている架橋剤として公知のものの中から任意に選択して用いることができる。
本発明のレジスト組成物には、クエンチャーとして、またはレジストパターン形状、引き置き経時安定性などを向上させるために、さらに任意の成分として、塩基性化合物を配合させることが好ましい。
溶剤としては、含フッ素高分子化合物が可溶であれば特に制限されず、各種有機溶媒を使用することができる。有機溶媒としては、アセトン、メチルエチルケトン、シクロヘキサノン、メチルイソアミルケトン、2‐ヘプタノンなどのケトン類やエチレングリコール、エチレングリコールモノアセテート、ジエチレングリコール、ジエチレングリコールモノアセテート、プロピレングリコール、プロピレングリコールモノアセテート、プロピレングリコールモノメチルエーテル、ジプロピレングリコール、又はジプロピレングリコールモノアセテートのモノメチルエーテル、モノエチルエーテル、モノプロピルエーテル、モノブチルエーテル又はモノフェニルエーテルなどの多価アルコール類及びその誘導体や、ジオキサンのような環式エーテル類や乳酸メチル、乳酸エチル、酢酸メチル、酢酸エチル、酢酸ブチル、ピルビン酸メチル、ピルビン酸エチル、メトキシプロピオン酸メチル、エトキシプロピオン酸エチルなどのエステル類、キシレン、トルエンなどの芳香族系溶媒、フロン、代替フロン、パーフルオロ化合物、ヘキサフルオロイソプロピルアルコールなどのフッ素系溶剤、塗布性を高める目的で高沸点弱溶剤であるターペン系の石油ナフサ溶媒やパラフィン系溶媒などが使用可能である。これらは単独で用いてもよいし、2種以上混合して用いてもよい。
本発明のレジスト組成物は、界面活性剤、好ましくはフッ素系及び/又はシリコン系界面活性剤(フッ素系界面活性剤及びシリコン系界面活性剤、フッ素原子と珪素原子の両方を含有する界面活性剤)のいずれか、あるいは2種以上を含有することが好ましい。本発明のレジスト組成物が前記界面活性剤を含有することにより、250nm以下、特に220nm以下の露光光源の使用時に、また、パターンの線幅が一層細い時に特に有効であり、良好な感度及び解像度で、密着性及び現像欠陥の少ないレジストパターンを与えることが可能となる。
本発明のレジスト組成物には、スルホン酸塩樹脂と併せて公知の光酸発生剤を使用することができる。光酸発生剤としては、化学増幅型レジストの酸発生剤として用いられるものの中から、任意のものを選択して使用することができる。このような酸発生剤の例としては、ビススルホニルジアゾメタン類、ニトロベンジル誘導体類、オニウム塩類、ハロゲン含有トリアジン化合物類、シアノ基含有オキシムスルホネート化合物類、その他のオキシムスルホネート化合物などが挙げられる。これらの光酸発生剤は単独で用いてもよいし、2種以上を組み合わせて用いてもよく、また、その含有量は本発明のスルホン酸塩樹脂と合わせてレジスト組成物100質量部に対して、通常0.5~20質量部の範囲で選ばれる。この量が0.5質量部未満では像形成性が不十分であるし、20質量部を超えると均一な溶液が形成されにくく、保存安定性が低下する傾向がみられ好ましくない。また、光酸発生剤合計質量100質量部のうち本発明のスルホン酸塩樹脂は1~100質量部であり、10~100質量部とするのが好ましく、30~100質量部とするのがより好ましい。
付加的樹脂は、使用溶剤に溶解し他のレジスト組成物を構成する成分と相溶する樹脂であれば特に限定されず、可塑剤、安定剤、増粘剤、レベリング剤、消泡剤、相溶化剤、密着剤などとして作用する。
本発明のレジスト組成物は、従来のフォトレジスト技術によるレジストパターン形成に用いることができる。すなわち、まずシリコンウエーハのような基板に、レジスト組成物の溶液をスピンナーなどを用いて塗布し、乾燥することによって感光層を形成させ、これに露光装置などにより高エネルギー線又は電子線を所望のマスクパターンを介して照射し、加熱する。次いでこれを現像液、例えば0.1~10質量%テトラメチルアンモニウムヒドロキシド水溶液のようなアルカリ性水溶液などを用いて現像処理する。この形成方法でマスクパターンに忠実なパターンを得ることができる。さらに、所望によってレジスト組成物に混和性のある添加物、例えば付加的樹脂、クエンチャー、可塑剤、安定剤、着色剤、界面活性剤、増粘剤、レベリング剤、消泡剤、相溶化剤、密着剤、酸化防止剤などの種々添加剤を含有させることができる。
[メタクリロイルオキシ酢酸クロリドの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=6.22(s,1H),5.70(s,1H),4.96(s,2H;CH2),1.97(s,3H;CH3)。
[ピバル酸2-ブロモ-2,2-ジフルオロエチルの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=4.52(t,2H),1.19(s,9H).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-56.6(t,2F)。
[トリエチルアンモニウム 1,1-ジフルオロ-2-(ピバロイルオキシ)エタンスルフィナートの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=4.43(t,2H),3.04(q,6H),1.17(t,9H),1.11(s,9H).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-120.3(t,3F)。
[トリエチルアンモニウム 1,1-ジフルオロ-2-(ピバロイルオキシ)エタンスルホナートの物性]1H NMR(測定溶媒:重ジメチルスルホキシド,基準物質:テトラメチルシラン);δ=4.52(t,2H),3.06(q,6H),1.18(t,9H),1.14(s,9H).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-113.9(t,3F)。
[2-ヒドロキシ-1,1-ジフルオロエタンスルホン酸ナトリウムの物性]1H NMR(測定溶媒:重ジメチルスルホキシド,基準物質:テトラメチルシラン);δ=3.80(t,J=16.0Hz,2H;CH2).19F NMR(測定溶媒:重ジメチルスルホキシド,基準物質:トリクロロフルオロメタン);δ=-115.34(t,J=16.0Hz,2F;CF2)。
[2-[(メタクリロイルオキシ)アセトキシ]-1,1-ジフルオロエタンスルホン酸ナトリウムの物性]1H NMR(測定溶媒:重ジメチルスルホキシド,基準物質:テトラメチルシラン);δ=6.12(s,1H),5.78(s,1H),4.84(s,2H),4.59(t,J=16.0Hz,2H),1.91(s,3H).19F NMR(測定溶媒:重ジメチルスルホキシド,基準物質:トリクロロフルオロメタン);δ=-113.8(t,J=16.0Hz,2F)。
[トルフェニルスルホニウム 2-[(メタクリロイルオキシ)アセトキシ]-1,1-ジフルオロエタンスルホナートの物性]1H NMR(測定溶媒:重ジメチルスルホキシド,基準物質:テトラメチルシラン);δ=7.86-7.75(m,15H,Ph3S+),6.11(s,1H),5.78(s,1H),4.84(s,2H),4.59(t,J=15.6Hz,2H),1.90(s,3H).19F NMR(測定溶媒:重ジメチルスルホキシド,基準物質:トリクロロフルオロメタン);δ=-113.8(t,J=15.6Hz,2F)。
[2,2-ジフルオロ-3-ヒドロキシ-ペンタン酸エチルエステルの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=4.31(q,J=7.1Hz,2H;CH2-O),3.89(m,1H;CH-OH),2.50(br,1H;OH),1.71(m,1H),1.52(m,1H),1.32(t,J=7.1Hz,3H;CH3),1.02(t,J=7.3Hz,3H;CH3).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-115.26(d,J=252Hz,1F),-122.95(d,J=252Hz,1F)。
[メタクリル酸 1-エトキシカルボニル-1,1-ジフルオロ-2-ブチルエステルの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=6.14(s,1H;-CH2-),5.62(s,1H;-CH2-),5.35(m,1H;CH-O),4.27(m,2H;CH2-O),1.93(s,3H;CH3),1.81(m,2H;CH2),1.28(t、J=7.2Hz,3H;CH3),0.95(t,J=7.6Hz,3H;CH3).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-113.63(d,J=264Hz,1F),-119.57(d,J=264Hz,1F)。
[メタクリル酸 1-ヒドロキシカルボニル-1,1-ジフルオロ-2-ブチルエステルの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=7.24(br,1H;COOH),6.16(s,1H;-CH2-),5.63(s,1H;-CH2-),5.39(m,1H;CH-O),1.93(s,3H;CH3),1.85(m,2H;CH2),0.97(t、J=7.6Hz,3H;CH3),0.95(t,J=7.6Hz,3H;CH3).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-114.24(d,J=264Hz,1F),-119.48(d,J=264Hz,1F)。
[メタクリル酸 1-クロロカルボニル-1,1-ジフルオロ-2-ブチルエステルの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=6.14(s,1H;=CH2),5.63(s,1H;=CH2),5.43(m,1H;CH-O),1.92(s,3H;CH3-C),1.82(m,2H;CH2CH3のCH2),0.96(t、J=7.6Hz,3H;CH2CH3のCH3)19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-108.10(d,J=259Hz,1F),-114.01(d,J=259Hz,1F)。
[2-[3-(メタクリロイルオキシ)-2,2-ジフルオロ-n-ペンタノイル]-1,1-ジフルオロエタンスルホン酸ナトリウムの物性]1H NMR(測定溶媒:重ジメチルスルホキシド,基準物質:テトラメチルシラン);δ=6.08(s,1H;=CH2),5.78(s,1H;=CH2),5.32(m,1H;CH-O),4.77(t、J=16Hz,2H;CH2-O),1.88(s,3H;CH3-C),1.78(m,2H;CH2CH3のCH2),0.88(t、J=7.6Hz,3H;CH2CH3CのCH3).19F NMR(測定溶媒:重ジメチルスルホキシド,基準物質:ヘキサフルオロベンゼン);δ=48.33(t、J=16Hz,2F)、46.60(t、J=16Hz,2F)。
[トルフェニルスルホニウム 2-[3-(メタクリロイルオキシ)-2,2-ジフルオロ-n-ペンタノイル]-1,1-ジフルオロエタンスルホナートの物性]1H NMR(測定溶媒:重クロロホルム,基準物質:テトラメチルシラン);δ=7.67(m,15H;Ph3S+)6.08(s,1H;=CH2),5.53(s,1H;=CH2),5.34(m,1H;CH-O),4.85(t、J=16Hz,2H;CH2-O),1.84(s,3H;CH3-C),1.75(m,2H;CH2CH3のCH2),0.88(t、J=7.6Hz,3H;CH2CH3のCH3).19F NMR(測定溶媒:重クロロホルム,基準物質:トリクロロフルオロメタン);δ=-114.65(t、J=16Hz,2F)、-117.35(t、J=16Hz,2F)。
合成例P-1またはP-2と同様に樹脂P-3~P-19、X-1~X-6、N-1~N-4を製造した。共重合に使用した単量体とその比率ならびに共重合後、各単量体から得られる繰り返し単位のモル比と平均分子量(MW)を表1、表2に示す。
[レジスト溶液の調製]
製造した各樹脂、溶剤、並びにその他の添加剤を配合してレジスト組成物を調合した。調合したレジスト組成物における各成分の比は表3及び表4に示す。更に各レジスト組成物を0.2μmのメンブランフィルターで濾過することにより、レジスト溶液をそれぞれ調製した。
S-1:プロピレングリコールモノメチルエーテルアセテート(PGMEA)
S-2:γ-ブチロラクトン
S-3:乳酸エチル
S-4:シクロヘキサノン
O-1:N,N-ジブチルアニリン
O-2:2,6-ジイソプロピルアニリン
O-3:ジアザビシクロ[4.3.0]ノネン
O-4:2,4,5-トリフェニルイミダゾール
O-5:トリオクチルアミン
架橋剤:ニカラックMX-270(グリコールウリル系架橋剤、三和ケミカル製品)
次いで、全レジスト溶液をシリコンウェハー上にスピンコートし膜厚250ナノメータのレジスト膜を得た。110℃でプリベークを行った後、フォトマスクを介して248nm紫外線での露光を行ったのち、120℃でポストエクスポーザーベークを行った。その後、2.38質量%テトラメチルアンモニウムヒドロキシド水溶液を用い、23℃で1分間現像した。いずれのレジスト組成物からも高解像のパターン形状が得られ、基板への密着不良欠陥、成膜不良欠陥、現像欠陥、エッチング耐性不良による欠陥は見られなかった。各レジストの組成及び評価結果を表3及び表4に示す。
表5に示す各種の単量体を用いて合成例1および2と同様の手段でスルホン酸塩を含まない樹脂(P-1’~P-5’)を合成した。得られた樹脂の繰り返し単位のモル比と平均分子量(MW)を表5に示す。
以下に本発明のスルホン酸塩構造を含まないP’-1~P’-5の樹脂を用いて実施例1~33と同様にレジスト組成物、レジスト溶液を調製し、それを用いて上記の[パターン形成]と同様にパターンを形成してその形状を観察した。実施例とは異なり、参考例ではパターン歪みが観測された。結果を表6に示す。また、使用した既存の光酸発生剤であるトリフルオロメタンスルホン酸トリフェニルスルホニウム(PAG-3)とノナフルオロブタンスルホン酸トリフェニルスルホニウム塩(PAG-4)の化学構造を示す。
Claims (25)
- 下記一般式(2)で表される重合性含フッ素スルホン酸オニウム塩。
- 下記一般式(4)で表される繰り返し単位を有する樹脂。
- さらにオレフィン、含フッ素オレフィン、アクリル酸エステル、メタクリル酸エステル、含フッ素アクリル酸エステル、含フッ素メタクリル酸エステル、ノルボルネン化合物、含フッ素ノルボルネン化合物、スチレン系化合物、含フッ素スチレン系化合物、ビニルエーテル、および含フッ素ビニルエーテルに含まれる重合性二重結合が開裂して形成された繰り返し単位からなる群より選ばれた一種以上の繰り返し単位を有する請求項4または請求項5に記載の樹脂。
- さらに下記一般式(6)で表される繰り返し単位を有する請求項4または請求項5に記載の樹脂。
- さらに下記一般式(9)で表される繰り返し単位を有する請求項4または請求項5に記載の樹脂。
- 請求項4~12のいずれか1項に記載の樹脂と溶剤を少なくとも含むレジスト材料。
- 樹脂が酸不安定性基を有する樹脂であり、化学増幅ポジ型レジスト材料として機能する請求項13に記載のレジスト材料。
- さらに酸不安定性基を有する樹脂を含み、化学増幅ポジ型レジスト材料として機能する請求項13または請求項14に記載のレジスト材料。
- 樹脂がアルコール性ヒドロキシル基又はカルボキシル基を有する樹脂であり、化学増幅ネガ型レジスト材料として機能する請求項13に記載の化学増幅ネガ型レジスト材料。
- さらにアルコール性ヒドロキシル基又はカルボキシル基を有する樹脂を含む請求項13または請求項16に記載の化学増幅ネガ型レジスト材料。
- 請求項13~17のいずれか1項に記載のレジスト材料を基板上に塗布する工程と、加熱処理後フォトマスクを介して波長300nm以下の高エネルギー線で露光する工程と、必要に応じて加熱処理した後、現像液を用いて現像する工程とを含むことを特徴とするパターン形成方法。
- 露光する工程が、波長193nmのArFエキシマレーザーを用い、レジスト材料を塗布した基板と投影レンズの間に水、もしくは空気の屈折率より高い屈折率を有する水以外の液体を挿入する液浸リソグラフィー法であることを特徴とする請求項18に記載のパターン形成方法。
- 下記一般式(16)で表されるカルボン酸誘導体と、下記一般式(17)で表される1,1-ジフルオロ-2-ヒドロキシエタンスルホン酸塩をエステル化することを特徴とする、下記一般式(3)で表される重合性含フッ素スルホン酸塩の製造方法。
- 下記一般式(3)で表される重合性含フッ素スルホン酸塩を、下記一般式(18)で表される一価のオニウム塩を用いてオニウム塩交換することを特徴とする、下記一般式(2)で表される重合性含フッ素スルホン酸オニウム塩の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020117010974A KR101297266B1 (ko) | 2008-10-17 | 2009-10-08 | 중합성 아니온을 갖는 함불소술폰산염류와 그 제조 방법, 함불소 수지, 레지스트 조성물 및 그것을 사용한 패턴 형성 방법 |
US13/121,315 US8663897B2 (en) | 2008-10-17 | 2009-10-08 | Fluorine-containing sulfonates having polymerizable anions and manufacturing method therefor, fluorine-containing resins, resist compositions, and pattern-forming method using same |
CN2009801408903A CN102186890B (zh) | 2008-10-17 | 2009-10-08 | 具有聚合性阴离子的含氟磺酸盐类及其制造方法、含氟树脂、抗蚀剂组合物以及使用其的图案形成方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-268476 | 2008-10-17 | ||
JP2008268476A JP5401910B2 (ja) | 2008-10-17 | 2008-10-17 | 重合性アニオンを有する含フッ素スルホン塩類とその製造方法、含フッ素樹脂、レジスト組成物及びそれを用いたパターン形成方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010044372A1 true WO2010044372A1 (ja) | 2010-04-22 |
Family
ID=42106536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/067567 WO2010044372A1 (ja) | 2008-10-17 | 2009-10-08 | 重合性アニオンを有する含フッ素スルホン酸塩類とその製造方法、含フッ素樹脂、レジスト組成物及びそれを用いたパターン形成方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8663897B2 (ja) |
JP (1) | JP5401910B2 (ja) |
KR (1) | KR101297266B1 (ja) |
CN (1) | CN102186890B (ja) |
TW (1) | TWI398431B (ja) |
WO (1) | WO2010044372A1 (ja) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2455811A1 (en) * | 2010-11-19 | 2012-05-23 | Shin-Etsu Chemical Co., Ltd. | Sulfonium salt-containing polymer, resist composition, patterning process, and sulfonium salt monomer and making method |
US20120171616A1 (en) * | 2010-12-31 | 2012-07-05 | Thackeray James W | Polymerizable photoacid generators |
CN102629074A (zh) * | 2011-02-07 | 2012-08-08 | 锦湖石油化学株式会社 | 光酸产生剂、其制备方法及包含光酸产生剂的抗蚀剂组合物 |
CN102627586A (zh) * | 2011-02-07 | 2012-08-08 | 锦湖石油化学株式会社 | 光酸产生剂、其制备方法及包含光酸产生剂的抗蚀剂组合物 |
US20120208128A1 (en) * | 2011-02-14 | 2012-08-16 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition, method of forming resist pattern and polymeric compound |
US20120328983A1 (en) * | 2011-06-27 | 2012-12-27 | Dow Global Technologies Llc | Polymer composition and photoresist comprising same |
JP2013178508A (ja) * | 2012-02-07 | 2013-09-09 | Sumitomo Chemical Co Ltd | 樹脂、レジスト組成物及びレジストパターンの製造方法 |
KR20140007745A (ko) | 2012-07-10 | 2014-01-20 | 도오꾜오까고오교 가부시끼가이샤 | 암모늄염 화합물의 제조 방법, 화합물의 제조 방법, 그리고, 화합물, 고분자 화합물, 산 발생제, 레지스트 조성물 및 레지스트 패턴 형성 방법 |
TWI462901B (zh) * | 2010-06-25 | 2014-12-01 | Korea Kumho Petrochem Co Ltd | 化合物、含有該化合物的共聚合物及含有該共聚合物的抗蝕劑保護膜組成物 |
WO2016038476A1 (en) * | 2014-09-08 | 2016-03-17 | International Business Machines Corporation | Negative-tone resist compositions and multifunctional polymers therein |
Families Citing this family (65)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI400226B (zh) * | 2008-10-17 | 2013-07-01 | Shinetsu Chemical Co | 具有聚合性陰離子之鹽及高分子化合物、光阻劑材料及圖案形成方法 |
JP5514448B2 (ja) * | 2009-01-29 | 2014-06-04 | 富士フイルム株式会社 | 感活性光線または感放射線性樹脂組成物、および該組成物を用いたパターン形成方法 |
JP5525744B2 (ja) * | 2009-03-30 | 2014-06-18 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、およびそれを用いたパターン形成方法 |
JP5522165B2 (ja) * | 2009-04-21 | 2014-06-18 | Jsr株式会社 | 感放射線性樹脂組成物、重合体及びレジストパターン形成方法 |
EP2439590A4 (en) | 2009-06-04 | 2012-10-17 | Jsr Corp | RADIATION-SENSITIVE RESIN COMPOSITION, POLYMER, AND RESIST PATTERN FORMATION METHOD |
KR20110088453A (ko) * | 2010-01-27 | 2011-08-03 | 후지필름 가부시키가이샤 | 감활성광선성 또는 감방사선성 수지 조성물 및 그것을 사용한 패턴 형성 방법 |
JP5007846B2 (ja) * | 2010-02-26 | 2012-08-22 | 信越化学工業株式会社 | 化学増幅ネガ型レジスト組成物及びパターン形成方法 |
JP5561192B2 (ja) * | 2010-02-26 | 2014-07-30 | 信越化学工業株式会社 | 高分子化合物及びこれを用いた化学増幅ポジ型レジスト組成物並びにパターン形成方法 |
JP5802369B2 (ja) | 2010-07-29 | 2015-10-28 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、並びに、それを用いたレジスト膜及びパターン形成方法 |
JP5292377B2 (ja) * | 2010-10-05 | 2013-09-18 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、並びに、それを用いた感活性光線性又は感放射線性膜及びパターン形成方法 |
KR101535197B1 (ko) * | 2010-10-13 | 2015-07-08 | 샌트랄 글래스 컴퍼니 리미티드 | 중합성 함불소 술폰산염류, 함불소 술폰산염 수지, 레지스트 조성물 및 그것을 사용한 패턴 형성 방법 |
WO2012056901A1 (ja) * | 2010-10-27 | 2012-05-03 | セントラル硝子株式会社 | 含フッ素スルホン酸塩類、光酸発生剤、レジスト組成物及びそれを用いたパターン形成方法 |
JP2012136507A (ja) * | 2010-11-15 | 2012-07-19 | Rohm & Haas Electronic Materials Llc | 塩基反応性光酸発生剤およびこれを含むフォトレジスト |
JP5387546B2 (ja) * | 2010-11-25 | 2014-01-15 | 信越化学工業株式会社 | 高分子化合物、ポジ型レジスト材料及びパターン形成方法 |
EP2472321A1 (en) | 2010-12-31 | 2012-07-04 | Rohm and Haas Electronic Materials LLC | Method of preparing photoacid-generating monomer |
EP2472322A2 (en) * | 2010-12-31 | 2012-07-04 | Rohm and Haas Electronic Materials LLC | Photoacid generating monomer and precursor thereof |
JP5677135B2 (ja) | 2011-02-23 | 2015-02-25 | 東京応化工業株式会社 | レジスト組成物、レジストパターン形成方法および高分子化合物 |
JP5365651B2 (ja) * | 2011-02-28 | 2013-12-11 | 信越化学工業株式会社 | 化学増幅ネガ型レジスト組成物及びパターン形成方法 |
JP5715890B2 (ja) | 2011-06-10 | 2015-05-13 | 東京応化工業株式会社 | 高分子化合物の製造方法 |
KR101884497B1 (ko) | 2011-06-17 | 2018-08-01 | 도오꾜오까고오교 가부시끼가이샤 | 화합물, 라디칼 중합 개시제, 화합물의 제조 방법, 중합체, 레지스트 조성물, 레지스트 패턴 형성 방법 |
JP5903224B2 (ja) * | 2011-06-17 | 2016-04-13 | 東京応化工業株式会社 | 化合物、ラジカル重合開始剤、化合物の製造方法、重合体、レジスト組成物、レジストパターン形成方法。 |
JP2013227466A (ja) * | 2011-06-20 | 2013-11-07 | Central Glass Co Ltd | 含フッ素スルホン酸塩樹脂、含フッ素n−スルホニルオキシイミド樹脂、レジスト組成物及びそれを用いたパターン形成方法 |
US9221928B2 (en) * | 2011-06-20 | 2015-12-29 | Central Glass Company, Limited | Fluorine-containing sulfonate resin, fluorine-containing N-sulfonyloxyimide resin, resist composition and pattern formation method |
US20120322006A1 (en) * | 2011-06-20 | 2012-12-20 | Central Glass Company, Limited | Fluorine-Containing Sulfonate Resin, Resist Composition and Pattern Formation Method |
TWI449714B (zh) * | 2011-06-20 | 2014-08-21 | Central Glass Co Ltd | A fluorine-containing sulfonic acid salt resin, a fluorine-containing N-sulfoxy-imide resin, a resist composition, and a pattern forming method using the same |
TW201323456A (zh) * | 2011-07-21 | 2013-06-16 | Tokyo Ohka Kogyo Co Ltd | 聚合物,光阻組成物及光阻圖型之形成方法 |
JP2013023594A (ja) * | 2011-07-21 | 2013-02-04 | Tokyo Ohka Kogyo Co Ltd | 重合体、レジスト組成物及びレジストパターン形成方法 |
JP2013041160A (ja) * | 2011-08-17 | 2013-02-28 | Fujifilm Corp | 感活性光線性又は感放射線性樹脂組成物、並びに、この組成物を用いた感活性光線性又は感放射線性樹脂膜及びパターン形成方法 |
JP5835148B2 (ja) * | 2011-08-26 | 2015-12-24 | 信越化学工業株式会社 | パターン形成方法及びレジスト組成物 |
JP6019849B2 (ja) | 2011-09-08 | 2016-11-02 | セントラル硝子株式会社 | 含フッ素スルホン酸塩類、含フッ素スルホン酸塩樹脂、レジスト組成物及びそれを用いたパターン形成方法 |
JP2013075963A (ja) * | 2011-09-29 | 2013-04-25 | Jsr Corp | 化合物、重合体及びフォトレジスト組成物 |
JP2013225094A (ja) * | 2011-10-07 | 2013-10-31 | Jsr Corp | フォトレジスト組成物及びレジストパターン形成方法 |
US9057948B2 (en) | 2011-10-17 | 2015-06-16 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition for EUV or EB, and method of forming resist pattern |
JP2013097272A (ja) | 2011-11-02 | 2013-05-20 | Tokyo Ohka Kogyo Co Ltd | レジスト組成物およびレジストパターン形成方法 |
JP5856441B2 (ja) | 2011-11-09 | 2016-02-09 | 東京応化工業株式会社 | レジスト組成物、レジストパターン形成方法及び高分子化合物 |
JP5764480B2 (ja) | 2011-11-25 | 2015-08-19 | 東京応化工業株式会社 | レジスト組成物、レジストパターン形成方法及び高分子化合物 |
US9488914B2 (en) | 2012-01-23 | 2016-11-08 | Central Glass Company, Limited | Fluorine-containing sulfonic acid salt, fluorine-containing sulfonic acid salt resin, resist composition, and pattern forming method using same |
JP5745439B2 (ja) * | 2012-02-17 | 2015-07-08 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、並びに、これを用いたパターン形成方法、レジスト膜及び電子デバイスの製造方法 |
JP5668710B2 (ja) * | 2012-02-27 | 2015-02-12 | 信越化学工業株式会社 | 高分子化合物及びそれを含んだレジスト材料並びにパターン形成方法、該高分子化合物の製造方法 |
JP5965682B2 (ja) | 2012-03-12 | 2016-08-10 | 東京応化工業株式会社 | 高分子化合物の製造方法及びレジストパターン形成方法 |
US8795947B2 (en) | 2012-03-22 | 2014-08-05 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition and method of forming resist pattern |
US8795948B2 (en) | 2012-03-22 | 2014-08-05 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition, method of forming resist pattern and polymeric compound |
JP6020347B2 (ja) * | 2012-06-04 | 2016-11-02 | 信越化学工業株式会社 | 高分子化合物、レジスト材料及びパターン形成方法 |
JP5836201B2 (ja) * | 2012-06-05 | 2015-12-24 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、及びそれを用いたパターン形成方法 |
JP6159617B2 (ja) * | 2012-08-22 | 2017-07-05 | 住友化学株式会社 | 塩、レジスト組成物及びレジストパターンの製造方法 |
JP6159618B2 (ja) * | 2012-08-22 | 2017-07-05 | 住友化学株式会社 | 塩、レジスト組成物及びレジストパターンの製造方法 |
JP6307290B2 (ja) * | 2013-03-06 | 2018-04-04 | 東京応化工業株式会社 | レジスト組成物、レジストパターン形成方法 |
JP5740441B2 (ja) * | 2013-07-29 | 2015-06-24 | 富士フイルム株式会社 | 感活性光線または感放射線性樹脂組成物、および該組成物を用いたパターン形成方法 |
JP6361455B2 (ja) * | 2013-10-25 | 2018-07-25 | Jsr株式会社 | 着色組成物、着色硬化膜及び表示素子 |
US9229319B2 (en) * | 2013-12-19 | 2016-01-05 | Rohm And Haas Electronic Materials Llc | Photoacid-generating copolymer and associated photoresist composition, coated substrate, and method of forming an electronic device |
JP6059675B2 (ja) * | 2014-03-24 | 2017-01-11 | 信越化学工業株式会社 | 化学増幅型ネガ型レジスト組成物及びレジストパターン形成方法 |
JP6326492B2 (ja) * | 2014-06-19 | 2018-05-16 | 富士フイルム株式会社 | 感放射線性又は感活性光線性樹脂組成物、並びに、それを用いたレジスト膜、マスクブランクス、レジストパターン形成方法、及び電子デバイスの製造方法 |
US9557642B2 (en) | 2014-10-10 | 2017-01-31 | Rohm And Haas Electronic Materials Llc | Photoresist composition and associated method of forming an electronic device |
US9551930B2 (en) * | 2014-10-10 | 2017-01-24 | Rohm And Haas Electronic Materials Llc | Photoresist composition and associated method of forming an electronic device |
US9606434B2 (en) | 2014-10-10 | 2017-03-28 | Rohm And Haas Electronic Materials, Llc | Polymer comprising repeat units with photoacid-generating functionality and base-solubility-enhancing functionality, and associated photoresist composition and electronic device forming method |
JP6585477B2 (ja) * | 2014-11-26 | 2019-10-02 | 住友化学株式会社 | 塩、樹脂、レジスト組成物及びレジストパターンの製造方法 |
KR102324819B1 (ko) * | 2014-12-12 | 2021-11-11 | 삼성전자주식회사 | 포토레지스트용 고분자, 포토레지스트 조성물, 패턴 형성 방법 및 반도체 장치의 제조 방법 |
US9891522B2 (en) * | 2015-05-18 | 2018-02-13 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method and composition of a chemically amplified copolymer resist |
US11613519B2 (en) * | 2016-02-29 | 2023-03-28 | Rohm And Haas Electronic Materials Llc | Photoacid-generating monomer, polymer derived therefrom, photoresist composition including the polymer, and method of forming a photoresist relief image using the photoresist composition |
JP7128447B2 (ja) * | 2017-02-03 | 2022-08-31 | 日産化学株式会社 | ウレア結合を有する構造単位を有するポリマーを含むレジスト下層膜形成組成物 |
JP6922841B2 (ja) * | 2017-06-21 | 2021-08-18 | 信越化学工業株式会社 | レジスト材料及びパターン形成方法 |
JP7491173B2 (ja) * | 2020-10-01 | 2024-05-28 | 信越化学工業株式会社 | スルホニウム塩、化学増幅レジスト組成物及びパターン形成方法 |
CN113189842B (zh) * | 2020-12-20 | 2024-05-17 | 江苏穿越光电科技有限公司 | 一种彩色滤光片的制备方法 |
CN113801042B (zh) * | 2021-08-25 | 2022-09-27 | 上海新阳半导体材料股份有限公司 | 一种ArF光源干法光刻用多鎓盐型光产酸剂 |
CN117700586B (zh) * | 2024-02-05 | 2024-05-28 | 中国科学院理化技术研究所 | 基于聚苯乙烯类碘鎓盐及其光刻胶组合物 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006178317A (ja) * | 2004-12-24 | 2006-07-06 | Shin Etsu Chem Co Ltd | レジスト材料及びこれを用いたパターン形成方法 |
WO2008056795A1 (fr) * | 2006-11-10 | 2008-05-15 | Jsr Corporation | Sel d'onium d'acide sulfonique et résine polymérisables |
WO2009038148A1 (ja) * | 2007-09-21 | 2009-03-26 | Fujifilm Corporation | 感光性組成物、該感光性組成物を用いたパターン形成方法及び該感光性組成物に用いられる化合物 |
JP2009275155A (ja) * | 2008-05-15 | 2009-11-26 | Jsr Corp | 上層膜用組成物及びレジストパターン形成方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0473547A1 (de) | 1990-08-27 | 1992-03-04 | Ciba-Geigy Ag | Olefinisch ungesättigte Oniumsalze |
NO952329D0 (no) | 1995-06-13 | 1995-06-13 | Jotun As | Polymerer for grohemmende maling og fremgangsmåte for fremstilling derav |
JP3613491B2 (ja) | 1996-06-04 | 2005-01-26 | 富士写真フイルム株式会社 | 感光性組成物 |
JP4150509B2 (ja) | 2000-11-20 | 2008-09-17 | 富士フイルム株式会社 | ポジ型感光性組成物 |
JP2004004561A (ja) | 2002-02-19 | 2004-01-08 | Sumitomo Chem Co Ltd | ポジ型レジスト組成物 |
JP4103523B2 (ja) | 2002-09-27 | 2008-06-18 | Jsr株式会社 | レジスト組成物 |
JP4244755B2 (ja) | 2003-09-09 | 2009-03-25 | Jsr株式会社 | 感放射線性樹脂組成物 |
EP1897869A4 (en) | 2005-05-11 | 2010-05-05 | Jsr Corp | NOVEL COMPOUND, NOVEL POLYMER, AND NOVEL RADIATION SENSITIVE RESIN COMPOSITION |
JP5061612B2 (ja) | 2005-12-27 | 2012-10-31 | 住友化学株式会社 | 化学増幅型ポジ型レジスト組成物用酸発生樹脂 |
JP5076682B2 (ja) * | 2006-07-26 | 2012-11-21 | セントラル硝子株式会社 | N−(ビシクロ[2,2,1]ヘプト−5−エン−2−イルメチル)−1,1,1−トリフルオロメタンスルホンアミドの製造方法 |
JP4288518B2 (ja) | 2006-07-28 | 2009-07-01 | 信越化学工業株式会社 | ラクトン含有化合物、高分子化合物、レジスト材料及びパターン形成方法 |
JP4893580B2 (ja) | 2006-10-27 | 2012-03-07 | 信越化学工業株式会社 | 重合性アニオンを有するスルホニウム塩及び高分子化合物、レジスト材料及びパターン形成方法 |
US7569326B2 (en) * | 2006-10-27 | 2009-08-04 | Shin-Etsu Chemical Co., Ltd. | Sulfonium salt having polymerizable anion, polymer, resist composition, and patterning process |
JP5347349B2 (ja) * | 2007-09-18 | 2013-11-20 | セントラル硝子株式会社 | 2−ブロモ−2,2−ジフルオロエタノール及び2−(アルキルカルボニルオキシ)−1,1−ジフルオロエタンスルホン酸塩類の製造方法 |
JP5201363B2 (ja) * | 2008-08-28 | 2013-06-05 | 信越化学工業株式会社 | 重合性アニオンを有するスルホニウム塩及び高分子化合物、レジスト材料及びパターン形成方法 |
TWI400226B (zh) * | 2008-10-17 | 2013-07-01 | Shinetsu Chemical Co | 具有聚合性陰離子之鹽及高分子化合物、光阻劑材料及圖案形成方法 |
-
2008
- 2008-10-17 JP JP2008268476A patent/JP5401910B2/ja not_active Expired - Fee Related
-
2009
- 2009-10-08 CN CN2009801408903A patent/CN102186890B/zh not_active Expired - Fee Related
- 2009-10-08 WO PCT/JP2009/067567 patent/WO2010044372A1/ja active Application Filing
- 2009-10-08 KR KR1020117010974A patent/KR101297266B1/ko active IP Right Grant
- 2009-10-08 US US13/121,315 patent/US8663897B2/en not_active Expired - Fee Related
- 2009-10-16 TW TW098135179A patent/TWI398431B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006178317A (ja) * | 2004-12-24 | 2006-07-06 | Shin Etsu Chem Co Ltd | レジスト材料及びこれを用いたパターン形成方法 |
WO2008056795A1 (fr) * | 2006-11-10 | 2008-05-15 | Jsr Corporation | Sel d'onium d'acide sulfonique et résine polymérisables |
WO2009038148A1 (ja) * | 2007-09-21 | 2009-03-26 | Fujifilm Corporation | 感光性組成物、該感光性組成物を用いたパターン形成方法及び該感光性組成物に用いられる化合物 |
JP2009275155A (ja) * | 2008-05-15 | 2009-11-26 | Jsr Corp | 上層膜用組成物及びレジストパターン形成方法 |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI462901B (zh) * | 2010-06-25 | 2014-12-01 | Korea Kumho Petrochem Co Ltd | 化合物、含有該化合物的共聚合物及含有該共聚合物的抗蝕劑保護膜組成物 |
US8785105B2 (en) | 2010-11-19 | 2014-07-22 | Shin-Etsu Chemical Co., Ltd. | Sulfonium salt-containing polymer, resist composition, patterning process, and sulfonium salt monomer and making method |
EP2455811A1 (en) * | 2010-11-19 | 2012-05-23 | Shin-Etsu Chemical Co., Ltd. | Sulfonium salt-containing polymer, resist composition, patterning process, and sulfonium salt monomer and making method |
US20120171616A1 (en) * | 2010-12-31 | 2012-07-05 | Thackeray James W | Polymerizable photoacid generators |
CN102603579A (zh) * | 2010-12-31 | 2012-07-25 | 罗门哈斯电子材料有限公司 | 可聚合光产酸剂 |
US8900792B2 (en) * | 2010-12-31 | 2014-12-02 | Rohm And Haas Electronic Materials Llc | Polymerizable photoacid generators |
KR101428023B1 (ko) * | 2010-12-31 | 2014-08-08 | 롬 앤드 하스 일렉트로닉 머트어리얼즈 엘엘씨 | 중합가능한 광산 발생제 |
EP2472323A3 (en) * | 2010-12-31 | 2013-01-16 | Rohm and Haas Electronic Materials LLC | Polymerizable photoacid generators |
CN102629074A (zh) * | 2011-02-07 | 2012-08-08 | 锦湖石油化学株式会社 | 光酸产生剂、其制备方法及包含光酸产生剂的抗蚀剂组合物 |
CN102627586B (zh) * | 2011-02-07 | 2014-12-10 | 锦湖石油化学株式会社 | 光酸产生剂、其制备方法及包含光酸产生剂的抗蚀剂组合物 |
US8889901B2 (en) | 2011-02-07 | 2014-11-18 | Korea Kumho Petrochemical Co., Ltd. | Photoacid generator, method for producing the same, and resist composition comprising the same |
CN102627586A (zh) * | 2011-02-07 | 2012-08-08 | 锦湖石油化学株式会社 | 光酸产生剂、其制备方法及包含光酸产生剂的抗蚀剂组合物 |
US8986919B2 (en) * | 2011-02-14 | 2015-03-24 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition, method of forming resist pattern and polymeric compound |
US20120208128A1 (en) * | 2011-02-14 | 2012-08-16 | Tokyo Ohka Kogyo Co., Ltd. | Resist composition, method of forming resist pattern and polymeric compound |
US20120328983A1 (en) * | 2011-06-27 | 2012-12-27 | Dow Global Technologies Llc | Polymer composition and photoresist comprising same |
US10025181B2 (en) * | 2011-06-27 | 2018-07-17 | Dow Global Technologies Llc | Polymer composition and photoresist comprising same |
JP2013178508A (ja) * | 2012-02-07 | 2013-09-09 | Sumitomo Chemical Co Ltd | 樹脂、レジスト組成物及びレジストパターンの製造方法 |
KR20140007745A (ko) | 2012-07-10 | 2014-01-20 | 도오꾜오까고오교 가부시끼가이샤 | 암모늄염 화합물의 제조 방법, 화합물의 제조 방법, 그리고, 화합물, 고분자 화합물, 산 발생제, 레지스트 조성물 및 레지스트 패턴 형성 방법 |
US9075304B2 (en) | 2012-07-10 | 2015-07-07 | Tokyo Ohka Kogyo Co., Ltd. | Method of producing ammonium salt compound, method of producing compound, and compound, polymeric compound, acid generator, resist composition and method of forming resist pattern |
WO2016038476A1 (en) * | 2014-09-08 | 2016-03-17 | International Business Machines Corporation | Negative-tone resist compositions and multifunctional polymers therein |
GB2543681A (en) * | 2014-09-08 | 2017-04-26 | Ibm | Negative-tone resist compositions and multifunctional polymers therein |
GB2543681B (en) * | 2014-09-08 | 2017-07-26 | Ibm | Negative-tone resist compositions |
JP2017533452A (ja) * | 2014-09-08 | 2017-11-09 | インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Machines Corporation | ネガティブ・トーン・レジスト組成物およびその中の多官能基ポリマーならびにそれらを用いた半導体デバイス製造プロセス |
US10345700B2 (en) | 2014-09-08 | 2019-07-09 | International Business Machines Corporation | Negative-tone resist compositions and multifunctional polymers therein |
US11500285B2 (en) | 2014-09-08 | 2022-11-15 | International Business Machines Corporation | Multifunctional polymers |
Also Published As
Publication number | Publication date |
---|---|
TWI398431B (zh) | 2013-06-11 |
KR101297266B1 (ko) | 2013-08-16 |
CN102186890B (zh) | 2013-07-31 |
JP2010095643A (ja) | 2010-04-30 |
CN102186890A (zh) | 2011-09-14 |
TW201026653A (en) | 2010-07-16 |
KR20110069881A (ko) | 2011-06-23 |
US20110177453A1 (en) | 2011-07-21 |
JP5401910B2 (ja) | 2014-01-29 |
US8663897B2 (en) | 2014-03-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5401910B2 (ja) | 重合性アニオンを有する含フッ素スルホン塩類とその製造方法、含フッ素樹脂、レジスト組成物及びそれを用いたパターン形成方法 | |
JP5704046B2 (ja) | 重合性含フッ素スルホン酸塩類、含フッ素スルホン酸塩樹脂、レジスト組成物及びそれを用いたパターン形成方法 | |
JP5742662B2 (ja) | 含フッ素スルホン酸塩類、光酸発生剤、レジスト組成物及びそれを用いたパターン形成方法 | |
JP6019849B2 (ja) | 含フッ素スルホン酸塩類、含フッ素スルホン酸塩樹脂、レジスト組成物及びそれを用いたパターン形成方法 | |
US8283106B2 (en) | Sulfonic acid salt and derivative thereof, photoacid generator agent, and resist material and pattern formation method using the photoacid generator agent | |
JP6112018B2 (ja) | 含フッ素スルホン酸塩類、含フッ素スルホン酸塩樹脂、レジスト組成物及びそれを用いたパターン形成方法 | |
JP5347433B2 (ja) | 新規スルホン酸塩及びその誘導体、光酸発生剤並びにこれを用いたレジスト材料及びパターン形成方法 | |
KR101213586B1 (ko) | 신규 함불소 카르바니온 구조를 가지는 염 및 그 유도체, 광산발생제 및 이것을 사용한 레지스트재료 및 패턴 형성방법 | |
JP5589281B2 (ja) | 含フッ素化合物、含フッ素高分子化合物、レジスト組成物及びそれを用いたパターン形成方法 | |
US20120322006A1 (en) | Fluorine-Containing Sulfonate Resin, Resist Composition and Pattern Formation Method | |
US9221928B2 (en) | Fluorine-containing sulfonate resin, fluorine-containing N-sulfonyloxyimide resin, resist composition and pattern formation method | |
JP2013227466A (ja) | 含フッ素スルホン酸塩樹脂、含フッ素n−スルホニルオキシイミド樹脂、レジスト組成物及びそれを用いたパターン形成方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980140890.3 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09820550 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13121315 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20117010974 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09820550 Country of ref document: EP Kind code of ref document: A1 |