WO2018016634A1 - 化合物、樹脂及び組成物、並びにレジストパターン形成方法及び回路パターン形成方法 - Google Patents
化合物、樹脂及び組成物、並びにレジストパターン形成方法及び回路パターン形成方法 Download PDFInfo
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- WO2018016634A1 WO2018016634A1 PCT/JP2017/026512 JP2017026512W WO2018016634A1 WO 2018016634 A1 WO2018016634 A1 WO 2018016634A1 JP 2017026512 W JP2017026512 W JP 2017026512W WO 2018016634 A1 WO2018016634 A1 WO 2018016634A1
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- 0 CC(c1ccc(C(c2ccc(C)cc2)(c2ccc(*)c(-c(cccc3)c3O*)c2)c(cc2-c3ccccc3*)ccc2O*)cc1)(c(cc1-c2ccccc2)ccc1O)c(cc1-c2ccccc2)ccc1O* Chemical compound CC(c1ccc(C(c2ccc(C)cc2)(c2ccc(*)c(-c(cccc3)c3O*)c2)c(cc2-c3ccccc3*)ccc2O*)cc1)(c(cc1-c2ccccc2)ccc1O)c(cc1-c2ccccc2)ccc1O* 0.000 description 92
- LVGAZNUUPCRHIJ-UHFFFAOYSA-N C(c(cc1C2)ccc1OCN2c1ccccc1)c(cc1C2)ccc1OCN2c1ccccc1 Chemical compound C(c(cc1C2)ccc1OCN2c1ccccc1)c(cc1C2)ccc1OCN2c1ccccc1 LVGAZNUUPCRHIJ-UHFFFAOYSA-N 0.000 description 1
- XINNJZOHYHCPOV-UHFFFAOYSA-N CC(C(OCCNC(OCCOc1cc(OCCOC(NCCOC(C(C)=C)=O)=O)c(C(c2ccccc2)c(c(OCCOC(NCCOC(C(C)=C)=O)=O)c2)ccc2OCCOC(NCCOC(C(C)=C)=O)=O)cc1)=O)=O)=C Chemical compound CC(C(OCCNC(OCCOc1cc(OCCOC(NCCOC(C(C)=C)=O)=O)c(C(c2ccccc2)c(c(OCCOC(NCCOC(C(C)=C)=O)=O)c2)ccc2OCCOC(NCCOC(C(C)=C)=O)=O)cc1)=O)=O)=C XINNJZOHYHCPOV-UHFFFAOYSA-N 0.000 description 1
- MROFYLODWNLWPU-UHFFFAOYSA-N CC(c(cc1)ccc1-c1ccc(C(C)(c2c(cccc3)c3ccc2)c2cccc3c2ccc(C)c3)cc1)(c1c(cccc2)c2ccc1)c1c(ccc(C)c2)c2ccc1 Chemical compound CC(c(cc1)ccc1-c1ccc(C(C)(c2c(cccc3)c3ccc2)c2cccc3c2ccc(C)c3)cc1)(c1c(cccc2)c2ccc1)c1c(ccc(C)c2)c2ccc1 MROFYLODWNLWPU-UHFFFAOYSA-N 0.000 description 1
- ZASDIUVTNHDBGM-UHFFFAOYSA-N CC(c(cc1)ccc1-c1ccccc1)(c(c(cc1)c(cc2)cc1OCCOC(NCCOC(C(C)=C)=O)=O)c2OCCOC(NCCOC(C(C)=C)=O)=O)c1c(ccc(OCCOC(NCCOC(C(C)=C)=O)=O)c2)c2ccc1OCCOC(NCCOC(C(C)=C)=O)=O Chemical compound CC(c(cc1)ccc1-c1ccccc1)(c(c(cc1)c(cc2)cc1OCCOC(NCCOC(C(C)=C)=O)=O)c2OCCOC(NCCOC(C(C)=C)=O)=O)c1c(ccc(OCCOC(NCCOC(C(C)=C)=O)=O)c2)c2ccc1OCCOC(NCCOC(C(C)=C)=O)=O ZASDIUVTNHDBGM-UHFFFAOYSA-N 0.000 description 1
- XOCFGPBLRPGFEY-UHFFFAOYSA-N CC(c(cc1)ccc1-c1ccccc1)(c(c(cccc1)c1cc1)c1OC(NCCOC(C(C)=C)=O)=O)c1c(cccc2)c2ccc1OC(NCCOC(C(C)=C)=O)=O Chemical compound CC(c(cc1)ccc1-c1ccccc1)(c(c(cccc1)c1cc1)c1OC(NCCOC(C(C)=C)=O)=O)c1c(cccc2)c2ccc1OC(NCCOC(C(C)=C)=O)=O XOCFGPBLRPGFEY-UHFFFAOYSA-N 0.000 description 1
- RZTDCLJIWZBYOO-UHFFFAOYSA-N CC(c(cc1)ccc1-c1ccccc1)(c(cc1)cc(-c(cccc2)c2OCCOC(NCCOC(C(C)=C)=O)=O)c1OCCOC(NCCOC(C(C)=C)=O)=O)c(cc1-c(cccc2)c2OCCOC(NCCOC(C(C)=C)=O)=O)ccc1OCCOC(NCCOC(C(C)=C)=O)=O Chemical compound CC(c(cc1)ccc1-c1ccccc1)(c(cc1)cc(-c(cccc2)c2OCCOC(NCCOC(C(C)=C)=O)=O)c1OCCOC(NCCOC(C(C)=C)=O)=O)c(cc1-c(cccc2)c2OCCOC(NCCOC(C(C)=C)=O)=O)ccc1OCCOC(NCCOC(C(C)=C)=O)=O RZTDCLJIWZBYOO-UHFFFAOYSA-N 0.000 description 1
- RANZGHVBUMNQJQ-UHFFFAOYSA-N CC(c(cc1)ccc1-c1ccccc1)(c(ccc(OCCO)c1)c1Oc1c2)c1ccc2OCCO Chemical compound CC(c(cc1)ccc1-c1ccccc1)(c(ccc(OCCO)c1)c1Oc1c2)c1ccc2OCCO RANZGHVBUMNQJQ-UHFFFAOYSA-N 0.000 description 1
- SZSFYGJTGZRYFL-UHFFFAOYSA-N CCCc1ccc(C2c3c(ccc(OC(NCCOC(C(C)=C)=O)=O)c4)c4ccc3Oc(cc3)c2c(cc2)c3cc2OC(C)=O)cc1 Chemical compound CCCc1ccc(C2c3c(ccc(OC(NCCOC(C(C)=C)=O)=O)c4)c4ccc3Oc(cc3)c2c(cc2)c3cc2OC(C)=O)cc1 SZSFYGJTGZRYFL-UHFFFAOYSA-N 0.000 description 1
- JWCUSSPCBUCTNW-UHFFFAOYSA-N Oc1ccc(C(c2ccccc2)c(c(O)c2)ccc2O)c(O)c1 Chemical compound Oc1ccc(C(c2ccccc2)c(c(O)c2)ccc2O)c(O)c1 JWCUSSPCBUCTNW-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
- C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
- C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/16—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by singly-bound oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/40—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings
- C07C271/42—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/48—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by singly-bound oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/40—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings
- C07C271/42—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/54—Esters of carbamic acids having oxygen atoms of carbamate groups bound to carbon atoms of six-membered aromatic rings with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
-
- 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
- C08F120/00—Homopolymers 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
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/10—Esters
- C08F120/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F120/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (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
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
- C08F20/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F20/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/031—Organic compounds not covered by group G03F7/029
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
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- 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
Definitions
- the present invention relates to a compound having a specific structure, a resin, and a composition containing these.
- the present invention also relates to a pattern forming method (resist pattern forming method and circuit pattern forming method) using the composition.
- the molecular weight is as large as about 10,000 to 100,000, and the molecular weight distribution is wide, resulting in roughness on the pattern surface, making it difficult to control the pattern size, and limiting the miniaturization.
- various low molecular weight resist materials have been proposed so far in order to provide resist patterns with higher resolution. Since the low molecular weight resist material has a small molecular size, it is expected to provide a resist pattern with high resolution and low roughness.
- an alkali development type negative radiation sensitive composition for example, see Patent Document 1 and Patent Document 2 using a low molecular weight polynuclear polyphenol compound as a main component
- a low molecular weight resist material having high heat resistance As candidates, an alkali development negative radiation-sensitive composition using a low molecular weight cyclic polyphenol compound as a main component (see, for example, Patent Document 3 and Non-Patent Document 1) has also been proposed.
- Non-Patent Document 2 a polyphenol compound as a base compound for a resist material can impart high heat resistance despite its low molecular weight, and is useful for improving the resolution and roughness of a resist pattern (for example, Non-Patent Document 2). reference).
- the inventors of the present invention provide a resist composition containing a compound having a specific structure and an organic solvent as a material that is excellent in etching resistance and is soluble in a solvent and applicable to a wet process (see, for example, Patent Document 4). is suggesting.
- a terminal layer is removed by applying a predetermined energy as a resist underlayer film for lithography having a dry etching rate selection ratio close to that of a resist.
- a material for forming a lower layer film for a multilayer resist process which contains at least a resin component having a substituent that generates a sulfonic acid residue and a solvent (see, for example, Patent Document 5).
- resist underlayer film materials containing a polymer having a specific repeating unit have been proposed as a material for realizing a resist underlayer film for lithography having a lower dry etching rate selectivity than resist (for example, Patent Documents). 6). Furthermore, in order to realize a resist underlayer film for lithography having a low dry etching rate selection ratio compared with a semiconductor substrate, a repeating unit of acenaphthylenes and a repeating unit having a substituted or unsubstituted hydroxy group are copolymerized. A resist underlayer film material containing a polymer is proposed (see, for example, Patent Document 7).
- an amorphous carbon underlayer film formed by CVD using methane gas, ethane gas, acetylene gas or the like as a raw material is well known.
- a resist underlayer film material capable of forming a resist underlayer film by a wet process such as spin coating or screen printing is required.
- the present inventors have a composition for forming an underlayer film for lithography containing a compound having a specific structure and an organic solvent as a material having excellent etching resistance, high heat resistance, soluble in a solvent and applicable to a wet process.
- the thing (for example, refer patent document 8) is proposed.
- a silicon nitride film formation method for example, see Patent Document 9
- a silicon nitride film CVD formation method for example, Patent Document 10.
- an intermediate layer material for a three-layer process a material containing a silsesquioxane-based silicon compound is known (see, for example, Patent Documents 11 and 12).
- compositions for optical members have been proposed in the past. However, none of them has a combination of heat resistance, transparency and refractive index at a high level, and development of new materials is required.
- the present invention has been made in view of the above-mentioned problems of the prior art, and the purpose thereof is a photoresist and an underlayer film for photoresist, which are applicable to a wet process, have excellent heat resistance, and have excellent solubility and etching resistance. It is in providing the compound, resin, and composition which are useful in order to form. Another object of the present invention is to provide a resist film, a resist underlayer film, a resist permanent film, and a pattern forming method using the composition. Furthermore, it is providing the composition for optical members.
- the present invention is as follows. [1] The compound represented by following formula (0).
- (0) (In Formula (0), R Y is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms, R Z is an N-valent group having 1 to 60 carbon atoms or a single bond, R T each independently has an alkyl group having 1 to 30 carbon atoms which may have a substituent, an aryl group having 6 to 30 carbon atoms which may have a substituent, or a substituent.
- An optionally substituted alkenyl group having 2 to 30 carbon atoms, an optionally substituted alkoxy group having 1 to 30 carbon atoms, a halogen atom, a nitro group, an amino group, a carboxylic acid group, a thiol group, a hydroxyl group or a hydroxyl group Are substituted with a group represented by the following formula (0-1), and the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- RT includes a group represented by the following formula (0-1)
- X represents an oxygen atom, a sulfur atom or no bridge
- m is each independently an integer of 0 to 9, wherein at least one of m is an integer of 1 to 9, N is an integer of 1 to 4, and when N is an integer of 2 or more, the structural formulas in N [] may be the same or different
- Each r is independently an integer of 0-2.
- R X represents a hydrogen atom or a methyl group.
- R 0 has the same meaning as R Y
- R 1 is an n-valent group having 1 to 60 carbon atoms or a single bond
- R 2 to R 5 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- the hydrogen atom is substituted with a group represented by the formula (0-1)
- the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- at least one of R 2A includes a group represented by the formula (0-1)
- n A has the same meaning as N above.
- n A is an integer of 2 or more
- the structural formulas in n A [] may be the same or different
- X A represents an oxygen atom, a sulfur atom, or no bridge
- m 2A is each independently an integer of 0 to 7, provided that at least one m 2A is an integer of 1 to 7
- q A is each independently 0 or 1.
- R 0 , R 1 , R 4 , R 5 , n, p 2 to p 5 , m 4 and m 5 have the same meanings as in the formula (1)
- R 6 to R 7 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- An alkenyl group having 2 to 30 carbon atoms, a halogen atom, a nitro group, an amino group, a carboxylic acid group, or a thiol group, which may have R 10 to R 11 are each independently a hydrogen atom or a group represented by the following formula (0-2);
- R 10 to R 11 is a group represented by the following formula (0-2)
- m 6 and m 7 are each independently an integer of 0 to 7, However, m 4 , m 5 , m 6 and m 7 are not 0 at the same time.
- R 8 to R 9 have the same meanings as R 6 to R 7
- R 12 to R 13 have the same meanings as R 10 to R 11
- m 8 and m 9 are each independently an integer of 0 to 8, However, m 6 , m 7 , m 8 and m 9 are not 0 at the same time.
- R 0A , R 1A , n A , q A and X A are as defined in the formula (2);
- Each R 3A is independently a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms which may have a substituent, and 6 to 30 carbon atoms which may have a substituent.
- R 4A is each independently a hydrogen atom or a group represented by the following formula (0-2);
- at least one of R 4A is a group represented by the following formula (0-2)
- m 6A is each independently an integer of 0 to 5.
- (0-2) In formula (0-2), R X has the same meaning as in formula (0-1), and s is an integer of 0 to 30.
- [7] A resin obtained by using the compound according to [1] as a monomer.
- the alkylene group, the arylene group and the alkoxylene group may contain an ether bond, a ketone bond or an ester bond
- R 0 has the same meaning as R Y
- R 1 is an n-valent group having 1 to 60 carbon atoms or a single bond
- R 2 to R 5 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- the alkylene group, the arylene group and the alkoxylene group may contain an ether bond, a ketone bond or an ester bond
- R 0A has the same meaning as R Y
- R 1A is an n A valent group having 1 to 30 carbon atoms or a single bond
- R 2A each independently has an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- the hydrogen atom is substituted with a group represented by the formula (0-1)
- the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- at least one of R 2A includes a group represented by the formula (0-1)
- n A has the same meaning as N above.
- n A is an integer of 2 or more, the structural formulas in n A [] may be the same or different, X A represents an oxygen atom, a sulfur atom, or no bridge, m 2A is each independently an integer of 0 to 7, provided that at least one m 2A is an integer of 1 to 6; q A is each independently 0 or 1.
- a composition comprising at least one selected from the group consisting of the compound according to any one of [1] to [6] and the resin according to any one of [7] to [9].
- the composition according to [10] further comprising a solvent.
- the crosslinking agent is at least one selected from the group consisting of phenol compounds, epoxy compounds, cyanate compounds, amino compounds, benzoxazine compounds, melamine compounds, guanamine compounds, glycoluril compounds, urea compounds, isocyanate compounds, and azide compounds.
- the composition according to [17], wherein the crosslinking accelerator is at least one selected from the group consisting of amines, imidazoles, organic phosphines, and Lewis acids.
- the content ratio of the crosslinking accelerator contains at least one selected from the group consisting of the compound according to any one of [1] to [6] and the resin according to any one of [7] to [9].
- the radical polymerization initiator is at least one selected from the group consisting of ketone photopolymerization initiators, organic peroxide polymerization initiators, and azo polymerization initiators, and any one of [10] to [20] A composition according to 1.
- the content ratio of the radical polymerization initiator contains at least one selected from the group consisting of the compound according to any one of [1] to [6] and the resin according to any one of [7] to [9].
- a method for forming a resist pattern comprising: forming a photoresist layer on a substrate using the composition described in [23]; and irradiating a predetermined region of the photoresist layer with radiation and developing.
- a lower layer film is formed on the substrate using the composition described in [23], and at least one photoresist layer is formed on the lower layer film, and then radiation is applied to a predetermined region of the photoresist layer.
- a resist pattern forming method including a step of irradiating and developing.
- a lower layer film is formed using the composition described in [23], an intermediate layer film is formed on the lower layer film using a resist intermediate layer film material, and at least on the intermediate layer film,
- a predetermined region of the photoresist layer is irradiated with radiation, developed to form a resist pattern, and then the intermediate layer film is etched using the resist pattern as a mask,
- a circuit pattern forming method comprising: etching the lower layer film using the obtained intermediate layer film pattern as an etching mask; and etching the substrate using the obtained lower layer film pattern as an etching mask to form a pattern on the substrate.
- the compound and resin according to the present invention are highly soluble in a safe solvent, have good heat resistance and etching resistance, and the composition according to the present invention gives a good resist pattern shape.
- the present embodiment a mode for carrying out the present invention (hereinafter also referred to as “the present embodiment”) will be described.
- the following embodiment is an illustration for demonstrating this invention, and this invention is not limited only to the embodiment.
- the compound of this embodiment is a compound represented by the formula (0) described later, or a resin obtained using the compound as a monomer.
- the compound and resin according to the present invention can be applied to a wet process and is useful for forming a photoresist underlayer film having excellent heat resistance and etching resistance.
- this film-forming composition for lithography uses a compound or resin having a specific structure that has high heat resistance and high solvent solubility, deterioration of the film during high-temperature baking is suppressed, oxygen plasma etching, etc. It is possible to form a resist and an underlayer film that are also excellent in etching resistance to.
- the adhesion with the resist layer is also excellent, so that an excellent resist pattern can be formed.
- the compound and resin in the present embodiment are excellent in sensitivity and resolution when used in a photosensitive material, and while maintaining high heat resistance, further, general-purpose organic solvents, other compounds, and resin components , And a resist permanent film excellent in compatibility with the additive. Furthermore, since the refractive index is high and coloring is suppressed by a wide range of heat treatment from low temperature to high temperature, it is also useful as various optical forming compositions.
- R Y is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms
- R Z is an N-valent group having 1 to 60 carbon atoms or a single bond
- R T each independently has an alkyl group having 1 to 30 carbon atoms which may have a substituent, an aryl group having 6 to 30 carbon atoms which may have a substituent, or a substituent.
- An optionally substituted alkenyl group having 2 to 30 carbon atoms, an optionally substituted alkoxy group having 1 to 30 carbon atoms, a halogen atom, a nitro group, an amino group, a carboxylic acid group, a thiol group, a hydroxyl group or a hydroxyl group Are substituted with a group represented by the following formula (0-1), and the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- RT includes a group represented by the following formula (0-1)
- X represents an oxygen atom, a sulfur atom or no bridge
- m is each independently an integer of 0 to 9, wherein at least one of m is an integer of 1 to 9, N is an integer of 1 to 4, and when N is an integer of 2 or more, the structural formulas in N [] may be the same or different
- Each r is independently an integer of 0-2.
- R X represents a hydrogen atom or a methyl group.
- the group containing a group represented by the formula (0-1) is a group having a group represented by the formula (0-1).
- R Y is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms.
- alkyl group a linear, branched or cyclic alkyl group can be used.
- R Y is a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms, excellent heat resistance and solvent solubility are imparted. Can do.
- R z is an N-valent group having 1 to 60 carbon atoms or a single bond, and each aromatic ring is bonded through this R z .
- N is an integer of 1 to 4, and when N is an integer of 2 or more, the structural formulas in N [] may be the same or different.
- N-valent group examples include those having a linear hydrocarbon group, a branched hydrocarbon group, or an alicyclic hydrocarbon group.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the N-valent hydrocarbon group may have an alicyclic hydrocarbon group, a double bond, a hetero atom, or an aromatic group having 6 to 60 carbon atoms.
- R T each independently has an alkyl group having 1 to 30 carbon atoms which may have a substituent, an aryl group having 6 to 30 carbon atoms which may have a substituent, or a substituent.
- the hydrogen atom is substituted with a group represented by the above formula (0-1)
- the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- the alkyl group, alkenyl group and alkoxy group may be linear, branched or cyclic groups.
- the group in which the hydrogen atom of the hydroxyl group is substituted with a vinylphenylmethyl group is a group having a vinylphenylmethyl group, for example, a vinylphenylmethyl group, a vinylphenylmethylmethyl group, a vinylphenylmethylphenyl group, or the like. Can be mentioned.
- X represents an oxygen atom, a sulfur atom or no bridge, and when X is an oxygen atom or a sulfur atom, it tends to develop high heat resistance, and is more preferably an oxygen atom.
- X is preferably non-crosslinked from the viewpoint of solubility.
- M is each independently an integer of 0 to 9, and at least one of m is an integer of 1 to 9.
- Each r is independently an integer of 0-2.
- the numerical range of m described above is determined according to the ring structure determined by r.
- the compound represented by the above formula (0) has a relatively low molecular weight, but has high heat resistance due to the rigidity of its structure, and therefore can be used under high temperature baking conditions. Moreover, it has tertiary carbon or quaternary carbon in the molecule, the crystallinity is suppressed, and it is suitably used as a film forming composition for lithography that can be used for manufacturing a film for lithography.
- the resist formation composition for lithography containing the compound represented by Formula (0) can give a favorable resist pattern shape. .
- the film has a relatively low molecular weight and low viscosity, even a substrate having a step (particularly, a fine space or a hole pattern) can be uniformly filled to every corner of the step and the film can be flattened.
- the composition for forming an underlayer film for lithography containing the compound represented by the formula (0) has good embedding and planarization characteristics.
- the compound represented by the formula (0) is a compound having a relatively high carbon concentration, high etching resistance can be imparted.
- the composition containing the compound represented by the formula (0) has a high aromatic density, the refractive index is high, and coloring is suppressed by a wide range of heat treatment from low temperature to high temperature. It is also useful as a forming composition. Among them, a compound having a quaternary carbon is preferable from the viewpoint of suppressing oxidative decomposition to suppress coloring of the compound, high heat resistance, and improving solvent solubility.
- Optical parts are used in the form of films and sheets, as well as plastic lenses (prism lenses, lenticular lenses, micro lenses, Fresnel lenses, viewing angle control lenses, contrast enhancement lenses, etc.), retardation films, electromagnetic wave shielding films, prisms It is useful as an optical fiber, a solder resist for flexible printed wiring, a plating resist, an interlayer insulating film for multilayer printed wiring boards, and a photosensitive optical waveguide.
- the compound represented by the formula (0) in the present embodiment is preferably a compound represented by the following formula (1). Since the compound of the present embodiment is a compound represented by the following formula (1), it tends to have higher heat resistance and higher solvent solubility.
- R 0 has the same meaning as R Y described above, and is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms.
- R 0 is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms
- the heat resistance is relatively high and the solvent solubility tends to be improved.
- R 0 is an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms from the viewpoint of suppressing oxidative decomposition and suppressing coloring of the compound, and improving heat resistance and solvent solubility. To preferred.
- R 1 is an n-valent group having 1 to 60 carbon atoms or a single bond, and each aromatic ring is bonded through R 1 .
- R 2 to R 5 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- n has the same meaning as N above, and is an integer of 1 to 4.
- n is an integer of 2 or more, the structural formulas in the n [] may be the same or different.
- p 2 to p 5 are each independently an integer of 0 to 2.
- the alkyl group, alkenyl group and alkoxy group may be linear, branched or cyclic groups.
- Examples of the n-valent group include those having a linear hydrocarbon group, a branched hydrocarbon group, and an alicyclic hydrocarbon group.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the n-valent group may be an aromatic group having 6 to 60 carbon atoms.
- the n-valent hydrocarbon group may have an alicyclic hydrocarbon group, a double bond, a hetero atom, or an aromatic group having 6 to 60 carbon atoms.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the compound represented by the above formula (1) has a relatively low molecular weight, but has high heat resistance due to the rigidity of its structure, and therefore can be used under high temperature baking conditions. Moreover, it has tertiary carbon or quaternary carbon in the molecule, the crystallinity is suppressed, and it is suitably used as a film forming composition for lithography that can be used for manufacturing a film for lithography.
- the resist formation composition for lithography containing the compound represented by said Formula (1) may give a favorable resist pattern shape. it can.
- the film has a relatively low molecular weight and low viscosity, even a substrate having a step (particularly, a fine space or a hole pattern) can be uniformly filled to every corner of the step and the film can be flattened.
- the composition for forming a lower layer film for lithography using the same has good embedding and planarization characteristics.
- it is a compound having a relatively high carbon concentration, high etching resistance can be imparted.
- the aromatic density is high, the refractive index is high, and coloring is suppressed by a wide range of heat treatment from low temperature to high temperature, so that it is useful as a composition for forming various optical parts.
- a compound having a quaternary carbon is preferable from the viewpoint of suppressing oxidative decomposition to suppress coloring of the compound, high heat resistance, and improving solvent solubility.
- Optical parts are used in the form of films and sheets, as well as plastic lenses (prism lenses, lenticular lenses, micro lenses, Fresnel lenses, viewing angle control lenses, contrast enhancement lenses, etc.), retardation films, electromagnetic wave shielding films, prisms It is useful as an optical fiber, a solder resist for flexible printed wiring, a plating resist, an interlayer insulating film for multilayer printed wiring boards, and a photosensitive optical waveguide.
- the compound represented by the above formula (1) is preferably a compound represented by the following formula (1-1) from the viewpoint of easy crosslinking and solubility in an organic solvent. (1-1)
- R 0 , R 1 , R 4 , R 5 , n, p 2 to p 5 , m 4 and m 5 are as defined in the above formula (1)
- R 6 to R 7 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- An alkenyl group having 2 to 30 carbon atoms, a halogen atom, a nitro group, an amino group, a carboxylic acid group, or a thiol group, which may have R 10 to R 11 are each independently a hydrogen atom or a group represented by the following formula (0-2);
- R 10 to R 11 is a group represented by the following formula (0-2)
- m 6 and m 7 are each independently an integer of 0 to 7, However, m 4 , m 5 , m 6 and m 7 are not 0 at the same time.
- R X has the same meaning as in formula (0-1) above, and s is an integer of 0 to 30.
- the compound represented by the above formula (1-1) is preferably a compound represented by the following formula (1-2) from the viewpoint of further crosslinking and solubility in an organic solvent. .
- R 0 , R 1 , R 6 , R 7 , R 10 , R 11 , n, p 2 to p 5 , m 6 and m 7 are as defined in the above formula (1-1), R 8 to R 9 have the same meanings as R 6 to R 7 above, R 12 to R 13 have the same meanings as R 10 to R 11 above, m 8 and m 9 are each independently an integer of 0 to 8. However, m 6 , m 7 , m 8 and m 9 are not 0 at the same time.
- the compound represented by the above formula (1-1) is preferably a compound represented by the following formula (1a) from the viewpoint of raw material supply.
- R 0 to R 5 , m 2 to m 5 and n have the same meaning as described in the above formula (1).
- the compound represented by the above formula (1a) is more preferably a compound represented by the following formula (1b) from the viewpoint of solubility in an organic solvent.
- R 0 , R 1 , R 4 , R 5 , R 10 , R 11 , m 4 , m 5 , and n are as defined in the above formula (1), and R 6 , R 7 , R 10 , R 11 , m 6 and m 7 have the same meanings as described in the above formula (1-1).
- the compound represented by the formula (1a) is more preferably a compound represented by the following formula (1b ′) from the viewpoint of reactivity.
- R 0 , R 1 , R 4 , R 5 , m 4 , m 5 , and n are as defined in the above formula (1), and R 6 , R 7 , R 10 , R 11 , m 6 and m 7 have the same meanings as described in the above formula (1-1).
- the compound represented by the above formula (1b) is more preferably a compound represented by the following formula (1c) from the viewpoint of solubility in an organic solvent.
- R 0 , R 1 , R 6 to R 13 , m 6 to m 9 , and n are as defined in the above formula (1-2).
- the compound represented by the formula (1b ′) is more preferably a compound represented by the following formula (1c ′) from the viewpoint of reactivity.
- R 0 , R 1 , R 6 to R 13 , m 6 to m 9 , and n are as defined in the formula (1-2).
- X is the same as those described in the above formula (0)
- R T ' has the same meaning as R T described by the above formula (0)
- m each independently 1-6 Is an integer.
- X is the same as those described in the above formula (0)
- R Y ', R Z' are as defined R Y, R Z described by the above formula (0).
- at least one of OR 4A includes a group represented by the following formula (0-1).
- R 2 , R 3 , R 4 , and R 5 have the same meaning as described in the above formula (1).
- m 2 and m 3 are integers from 0 to 6
- m 4 and m 5 are integers from 0 to 7.
- at least one selected from R 2 , R 3 , R 4 and R 5 includes a group represented by the following formula (0-1), and m 2 , m 3 , m 4 and m 5 are simultaneously 0 and None become.
- R X represents a hydrogen atom or a methyl group.
- R 10 , R 11 , R 12 , and R 13 have the same meanings as described in the above formula (1-2), and at least one of R 10 to R 13 is represented by the following formula (0-2). It is a group represented.
- R X has the same meaning as in formula (0-1), and s is an integer of 0 to 30.
- the compound represented by the formula (1) is particularly preferably a compound represented by the following formulas (BiF-1) to (BiF-10) from the viewpoint of further solubility in an organic solvent.
- R 10 , R 11 , R 12 , and R 13 have the same meanings as described in the above formula (1-2), and at least one of R 10 to R 13 is represented by the following formula (0-2). It is a group represented.
- R X has the same meaning as in formula (0-1), and s is an integer of 0 to 30.
- R 0 , R 1 and n are as defined in the above formula (1-1), and R 10 ′ and R 11 ′ are R 10 and R described in the above formula (1-1).
- 11 and R 4 ′ and R 5 ′ each independently represents an alkyl group having 1 to 30 carbon atoms which may have a substituent, and 6 to 6 carbon atoms which may have a substituent.
- aryl groups an optionally substituted alkenyl group having 2 to 30 carbon atoms, an optionally substituted alkoxy group having 1 to 30 carbon atoms, a halogen atom, a nitro group, an amino group, A carboxylic acid group, a thiol group, a hydroxyl group or a group in which a hydrogen atom of the hydroxyl group is substituted by the following formula (0-1), the alkyl group, the aryl group, the alkenyl group, and the alkoxy group are an ether bond, a ketone bond or may contain an ester bond, R 10 'and R 1 at least one of the 'comprises radicals substituted by the following formula (0-2).
- n 4 ′ and m 5 ′ are integers of 0 to 8
- m 10 ′ and m 11 ′ are integers of 1 to 9
- m 4 ′ + m 10 ′ and m 4 ′ + m 11 ′ are independent of each other. It is an integer from 1 to 9.
- R X has the same meaning as in formula (0-1), and s is an integer of 0 to 30.
- R 0 for example, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, triacontyl group, phenyl group, naphthyl Group, anthracene group, pyrenyl group, biphenyl group and heptacene group.
- R 4 ′ and R 5 ′ include, for example, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, triacontyl group , Cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl Group, naphthyl group, anthracene group, pyrenyl group, biphenyl group, heptacene group, vinyl group,
- R 0 , R 4 ′ and R 5 ′ includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2),
- R 16 represents a linear, branched or cyclic alkylene group having 1 to 30 carbon atoms, carbon number A bivalent aryl group having 6 to 30 carbon atoms or a divalent alkenyl group having 2 to 30 carbon atoms.
- R 16 examples include methylene group, ethylene group, propene group, butene group, pentene group, hexene group, heptene group, octene group, nonene group, decene group, undecene group, dodecene group, triacontene group, cyclopropene group.
- Cyclobutene group cyclopentene group, cyclohexene group, cycloheptene group, cyclooctene group, cyclononene group, cyclodecene group, cycloundecene group, cyclododecene group, cyclotriacontene group, divalent norbornyl group, divalent adamantyl group, divalent Phenyl group, divalent naphthyl group, divalent anthracene group, divalent pyrene group, divalent biphenyl group, divalent heptacene group, divalent vinyl group, divalent allyl group, divalent tria A contenyl group is mentioned.
- R 16 includes isomers.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the above formula (1-2), and R 14 each independently represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms.
- m 14 is an integer of 0 to 5;
- 14 ′ is an integer of 0 to 4, and m 14 is an integer of 0 to 5.
- R 14 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a triacontyl group, a cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, pyrenyl group, bipheny
- R 14 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 0 , R 4 ′ , R 5 ′ , m 4 ′ , m 5 ′ , m 10 ′ and m 11 ′ are as defined above, and R 1 ′ is a group having 1 to 60 carbon atoms. is there.
- R 10 to R 13 have the same meanings as described in the above formula (1-2), and R 14 each independently represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms.
- m 14 is an integer of 0 to 5
- 14 ′ is an integer from 0 to 4
- m 14 ′′ is an integer from 0 to 3.
- R 14 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a triacontyl group, a cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, pyrenyl group, bipheny
- R 14 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2),
- R 15 represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms, An aryl group having 6 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, a halogen atom, and a thiol group.
- R 15 for example, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, triacontyl group, cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, pyrenyl group, biphenyl group, heptacene group, vinyl group, allyl group, triaconty
- R 15 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2).
- the compound represented by the formula (0) is more preferably a compound listed below from the viewpoint of availability of raw materials.
- R 10 to R 13 have the same meanings as described in the formula (1-2).
- the compound represented by the formula (0) is preferably a compound having the following structure from the viewpoint of etching resistance.
- R 0A has the same meaning as R Y in the formula (0)
- R 1A ′ has the same meaning as R Z in the formula (0)
- R 10 to R 13 have the same formulas (1) -2) The same meaning as described in 2).
- R 10 to R 13 have the same meanings as described in the formula (1-2).
- R 14 each independently represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, or an alkenyl group having 2 to 30 carbon atoms, or 1 to 30 carbon atoms.
- An alkoxy group, a halogen atom, and a thiol group, and m 14 is an integer of 0 to 4.
- R 14 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a triacontyl group, a cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, heptacene group, vinyl group
- R 14 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2),
- R 15 represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms, An aryl group having 6 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, a halogen atom, and a thiol group.
- R 15 for example, methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, triacontyl group, cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, heptacene group, vinyl group, allyl group, triacontenyl group, methoxy group, ethyl
- R 15 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2),
- R 16 represents a linear, branched or cyclic alkylene group having 1 to 30 carbon atoms, carbon number A bivalent aryl group having 6 to 30 carbon atoms or a divalent alkenyl group having 2 to 30 carbon atoms.
- R 16 examples include methylene group, ethylene group, propene group, butene group, pentene group, hexene group, heptene group, octene group, nonene group, decene group, undecene group, dodecene group, triacontene group, cyclopropene group.
- Cyclobutene group cyclopentene group, cyclohexene group, cycloheptene group, cyclooctene group, cyclononene group, cyclodecene group, cycloundecene group, cyclododecene group, cyclotriacontene group, divalent norbornyl group, divalent adamantyl group, divalent A phenyl group, a divalent naphthyl group, a divalent anthracene group, a divalent heptacene group, a divalent vinyl group, a divalent allyl group, and a divalent triacontenyl group.
- R 16 includes isomers.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 ⁇ R 13 have the same meanings as those described by the formula (1-2)
- R 14 are each independently C 1 -C 30 linear, alkyl branched or cyclic Group, an aryl group having 6 to 30 carbon atoms, or an alkenyl group having 2 to 30 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, a halogen atom, and a thiol group
- m 14 ′ is an integer of 0 to 4.
- R 14 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a triacontyl group, a cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, heptacene group, vinyl group
- R 14 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the above formula (1-2), and R 14 each independently represents a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms.
- R 14 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a triacontyl group, a cyclopropyl group, Cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, cyclodecyl group, cycloundecyl group, cyclododecyl group, cyclotriacontyl group, norbornyl group, adamantyl group, phenyl group, naphthyl group, Anthracene group, heptacene group, vinyl group
- R 14 includes an isomer.
- the butyl group includes an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- R 10 to R 13 have the same meanings as described in the formula (1-2).
- compounds having a dibenzoxanthene skeleton are more preferable from the viewpoint of heat resistance.
- the compound represented by the formula (0) is more preferably a compound listed below from the viewpoint of availability of raw materials.
- R 10 to R 13 have the same meanings as described in the formula (1-2).
- compounds having a dibenzoxanthene skeleton are more preferable from the viewpoint of heat resistance.
- the compound represented by the above formula (0) is preferably a compound having the following structure from the viewpoint of raw material availability.
- R 0A has the same meaning as R Y in the formula (0)
- R 1A ′ has the same meaning as R Z in the formula (0)
- R 10 to R 13 have the same formulas (1) -2) The same meaning as described in 2).
- the compounds listed above are more preferably compounds having a xanthene skeleton from the viewpoint of heat resistance.
- Examples of the compound represented by the above formula (0) further include compounds represented by the following formula.
- R 10 to R 13 have the same meanings as those described in the above formula (1-2), and R 14 , R 15 , R 16 , m 14 , and m 14 ′ have the same meanings as described in the above formulas. It is.
- the compound represented by the formula (1) used in the present embodiment can be appropriately synthesized by applying a known technique, and the synthesis technique is not particularly limited.
- a polyphenol compound is obtained by subjecting a biphenol, binaphthol or bianthracenol and a corresponding aldehyde or ketone to a polycondensation reaction under an acid catalyst under normal pressure, and subsequently, at least one of the polyphenol compounds. It can be obtained by introducing a group represented by the following formula (0-1A) into two phenolic hydroxyl groups. It can also be obtained by introducing a group represented by the following formula (0-1B) and introducing a group represented by the following formula (0-1A) into the hydroxy group. Moreover, it can also carry out under pressure as needed.
- R X represents a hydrogen atom or a methyl group.
- R W is C 1 -C 30 straight, an alkylene group branched or cyclic, s is an integer of 0 to 30.
- biphenols examples include, but are not limited to, biphenol, methyl biphenol, methoxy binaphthol, and the like. These can be used individually by 1 type or in combination of 2 or more types. Among these, it is more preferable to use biphenol from the viewpoint of stable supply of raw materials.
- binaphthols examples include, but are not limited to, binaphthol, methyl binaphthol, methoxy binaphthol, and the like. These can be used alone or in combination of two or more. Among these, it is more preferable to use binaphthol in terms of increasing the carbon atom concentration and improving heat resistance.
- aldehydes examples include formaldehyde, trioxane, paraformaldehyde, benzaldehyde, acetaldehyde, propylaldehyde, phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, biphenylaldehyde, Examples include naphthaldehyde, anthracene carbaldehyde, phenanthrene carbaldehyde, pyrene carbaldehyde, furfural, and the like, but are not limited thereto.
- benzaldehyde phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, cyclohexylbenzaldehyde, biphenylaldehyde, naphthaldehyde, anthracenecarbaldehyde, phenanthrenecarbaldehyde, pyrenecarboaldehyde It is preferable to use aldehyde or furfural in terms of giving high heat resistance.
- ketones examples include acetone, methyl ethyl ketone, cyclobutanone, cyclopentanone, cyclohexanone, norbornanone, tricyclohexanone, tricyclodecanone, adamantanone, fluorenone, benzofluorenone, acenaphthenequinone, acenaphthenone, anthraquinone, acetophenone, diacetylbenzene.
- the acid catalyst used in the above reaction can be appropriately selected from known ones and is not particularly limited.
- inorganic acids and organic acids are widely known.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid; oxalic acid, malonic acid, succinic acid, Adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid,
- organic acids such as naphthalenedisulfonic acid
- Lewis acids such as zinc chloride, aluminum chloride, iron chloride, and boron trifluoride
- solid acids such as silicotungstic acid, phosphotungstic acid
- an organic acid and a solid acid are preferable from the viewpoint of production, and hydrochloric acid or sulfuric acid is preferably used from the viewpoint of production such as availability and ease of handling.
- an acid catalyst 1 type can be used individually or in combination of 2 or more types. The amount of the acid catalyst used can be appropriately set according to the raw material to be used, the type of catalyst to be used, and further the reaction conditions, and is not particularly limited. It is preferable that it is a mass part.
- a reaction solvent may be used.
- the reaction solvent is not particularly limited as long as the reaction of aldehydes or ketones to be used with biphenols, binaphthols or bianthracenediol proceeds, and may be appropriately selected from known ones. it can.
- Examples of the reaction solvent include water, methanol, ethanol, propanol, butanol, tetrahydrofuran, dioxane, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, or a mixed solvent thereof.
- a solvent can be used individually by 1 type or in combination of 2 or more types.
- the amount of these reaction solvents used can be appropriately set according to the raw materials used, the type of catalyst used, and the reaction conditions, and is not particularly limited, but is 0 to 2000 parts by mass with respect to 100 parts by mass of the reaction raw material. The range of parts is preferred.
- the reaction temperature in the above reaction can be appropriately selected according to the reactivity of the reaction raw material, and is not particularly limited, but is usually in the range of 10 to 200 ° C.
- a higher reaction temperature is preferable, and specifically, a range of 60 to 200 ° C. is preferable.
- the reaction method can be appropriately selected from known methods, and is not particularly limited. However, biphenols, binaphthols or bianthracenediol, aldehydes or ketones, a method of charging a catalyst at once, biphenols And a method in which binaphthols, bianthracenediol, aldehydes or ketones are dropped in the presence of a catalyst.
- the obtained compound can be isolated according to a conventional method, and is not particularly limited. For example, in order to remove unreacted raw materials, catalysts, etc. existing in the system, a general method such as raising the temperature of the reaction vessel to 130 to 230 ° C. and removing volatile components at about 1 to 50 mmHg is adopted. As a result, the target compound can be isolated.
- reaction conditions 1.0 mol to excess amount of biphenols, binaphthols or bianthracenediol and 0.001 to 1 mol of an acid catalyst are used at normal pressure with respect to 1 mol of aldehydes or ketones. And reaction at 50 to 150 ° C. for about 20 minutes to 100 hours.
- the target product can be isolated by a known method.
- the reaction solution is concentrated, pure water is added to precipitate the reaction product, cooled to room temperature, filtered and separated, and the resulting solid is filtered and dried, followed by column chromatography.
- the compound represented by the above formula (1), which is the target product can be obtained by separating and purifying from the by-product, and performing solvent distillation, filtration and drying.
- a method for introducing a group represented by the above formula (0-1A) into at least one phenolic hydroxyl group of a polyphenol compound is known.
- a group represented by the formula (0-1A) can be introduced into at least one phenolic hydroxyl group of the above compound as follows.
- a compound for introducing the group represented by the formula (0-1A) is synthesized by a known method or can be easily obtained. Examples thereof include 2-isonatoethyl methacrylate and 2-isonatoethyl acrylate. These are not particularly limited.
- the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like. Subsequently, the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like. The reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary. By drying, a compound in which the hydrogen atom of the hydroxyl group is substituted with the group represented by the above formula (0-1A) can be obtained.
- an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- THF
- the timing for introducing the group substituted with the group represented by the above formula (0-1A) may be not only after the condensation reaction of binaphthols with aldehydes or ketones but also before the condensation reaction. . Moreover, you may carry out after manufacturing resin mentioned later.
- a group represented by the above formula (0-1B) is introduced into at least one phenolic hydroxyl group of a polyphenol compound, and a group represented by the formula (0-1A) is introduced into the hydroxy group. It is known. For example, as described below, a group represented by the formula (0-1B) is introduced into at least one phenolic hydroxyl group of the above compound, and a group represented by the formula (0-1A) is added to the hydroxy group. Can be introduced.
- a compound for introducing a group represented by the formula (0-1B) can be synthesized or easily obtained by a known method.
- chloroethanol, bromoethanol, 2-chloroethyl acetate, 2-bromoethyl acetate examples include 2-iodoethyl acetate, ethylene oxide, propylene oxide, butylene oxide, ethylene carbonate, propylene carbonate, and butylene carbonate, but are not particularly limited thereto.
- the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- the reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary.
- a compound in which the hydrogen atom of the hydroxyl group is substituted with the group represented by the formula (0-1B) can be obtained.
- a hydroxyalkyl group is introduced by adding an alkylene carbonate to cause a decarboxylation reaction. Thereafter, the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like. Subsequently, the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary.
- a compound in which the hydrogen atom of the hydroxy group is substituted with a group substituted with a group represented by the formula (0-1A) can be obtained.
- the group substituted with the group represented by the formula (0-1A) reacts in the presence of a radical or an acid / alkali, and the acid, alkali, or organic used in the coating solvent or developer. Solubility in solvent changes.
- the group substituted with the group represented by the above formula (0-1A) causes a chain reaction in the presence of a radical or an acid / alkali in order to enable pattern formation with higher sensitivity and higher resolution. It preferably has properties.
- the compound represented by the above formula (1) can be used as it is as a film forming composition for lithography or a composition used for forming an optical component (hereinafter also simply referred to as “composition”).
- a resin obtained using the compound represented by the above formula (1) as a monomer can also be used as a composition.
- the resin is obtained, for example, by reacting a compound represented by the above formula (1) with a compound having a crosslinking reactivity.
- Examples of the resin obtained using the compound represented by the above formula (1) as a monomer include those having a structure represented by the following formula (3). That is, the composition of the present embodiment may contain a resin having a structure represented by the following formula (3).
- L has an optionally substituted alkylene group having 1 to 30 carbon atoms, an optionally substituted arylene group having 6 to 30 carbon atoms, and a substituent.
- the alkylene group, the arylene group, and the alkoxylene group may have an ether bond, a ketone bond, or an ester bond.
- the alkylene group and alkoxylene group may be a linear, branched or cyclic group.
- R 0 is synonymous with R Y above;
- R 1 is an n-valent group having 1 to 60 carbon atoms or a single bond,
- R 2 to R 5 are each independently an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- R 2 to R 5 includes a group represented by the above formula (0-1)
- m 2 and m 3 are each independently an integer of 0 to 8
- m 4 and m 5 are each independently an integer of 0 to 9
- m 2 , m 3 , m 4 and m 5 are not 0 at the same time
- n is synonymous with the above N.
- n is an integer of 2 or more
- the structural formulas in n [] may be the same or different
- p 2 to p 5 have the same meanings as r above.
- the resin of the present embodiment can be obtained by reacting the compound represented by the above formula (1) with a compound having crosslinking reactivity.
- a known compound can be used without particular limitation as long as the compound represented by the above formula (1) can be oligomerized or polymerized. Specific examples thereof include, but are not limited to, aldehydes, ketones, carboxylic acids, carboxylic acid halides, halogen-containing compounds, amino compounds, imino compounds, isocyanates, unsaturated hydrocarbon group-containing compounds, and the like.
- the resin having the structure represented by the above formula (3) include, for example, a condensation reaction of the compound represented by the above formula (1) with an aldehyde and / or a ketone having a crosslinking reactivity, etc. And a novolak resin.
- aldehyde for example, formaldehyde, trioxane, paraformaldehyde, benzaldehyde, acetaldehyde, propylaldehyde, phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde
- examples thereof include, but are not limited to, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, biphenylaldehyde, naphthaldehyde, anthracenecarbaldehyde, phenanthrenecarbaldehyde, pyrenecarbaldehyde, and furfural.
- ketones include the above ketones. Among these, formaldehyde is more preferable. In addition, these aldehydes and / or ketones can be used individually by 1 type or in combination of 2 or more types.
- the amount of the aldehyde and / or ketone used is not particularly limited, but is preferably 0.2 to 5 mol, more preferably 1 mol with respect to 1 mol of the compound represented by the formula (1). 0.5 to 2 moles.
- a catalyst may be used.
- the acid catalyst used here can be appropriately selected from known ones and is not particularly limited.
- As such an acid catalyst inorganic acids and organic acids are widely known.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid; oxalic acid, malonic acid, succinic acid, Adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid,
- organic acids such as naphthalenedisulfonic acid
- Lewis acids such as zinc chloride, aluminum chloride, iron chloride, and boron trifluoride
- solid acids such as silicotungstic acid, phosphotungstic acid, silicomolybdic acid, and phosphomolybdic acid.
- an organic acid and a solid acid are preferable from the viewpoint of production, and hydrochloric acid or sulfuric acid is preferable from the viewpoint of production such as availability and ease of handling.
- an acid catalyst 1 type can be used individually or in combination of 2 or more types.
- the amount of the acid catalyst used can be appropriately set according to the raw material to be used, the type of catalyst to be used, and further the reaction conditions, and is not particularly limited. It is preferable that it is a mass part.
- aldehydes are not necessarily required.
- reaction solvent in the condensation reaction between the compound represented by the above formula (1) and the aldehyde and / or ketone, a reaction solvent can also be used.
- the reaction solvent in this polycondensation can be appropriately selected from known solvents and is not particularly limited. Examples thereof include water, methanol, ethanol, propanol, butanol, tetrahydrofuran, dioxane, and mixed solvents thereof. Can be mentioned.
- a solvent can be used individually by 1 type or in combination of 2 or more types.
- the amount of these solvents used can be appropriately set according to the raw materials used, the type of catalyst used, and the reaction conditions, and is not particularly limited, but is 0 to 2000 parts by mass with respect to 100 parts by mass of the reaction raw materials. It is preferable that it is the range of these.
- the reaction temperature can be appropriately selected according to the reactivity of the reaction raw material, and is not particularly limited, but is usually in the range of 10 to 200 ° C.
- the reaction method can be appropriately selected from known methods, and is not particularly limited.
- reaction method may be a method in which the compound represented by the above formula (1), the aldehyde and / or ketone, and a catalyst are charged together, The method of dripping the compound represented by the said Formula (1), an aldehyde, and / or ketones in catalyst presence is mentioned.
- the obtained compound can be isolated according to a conventional method, and is not particularly limited.
- a general method such as raising the temperature of the reaction vessel to 130 to 230 ° C. and removing volatile components at about 1 to 50 mmHg is adopted.
- the novolak resin as the target product can be isolated.
- the resin having the structure represented by the above formula (3) may be a homopolymer of the compound represented by the above formula (1), but is a copolymer with other phenols. May be.
- the copolymerizable phenols include phenol, cresol, dimethylphenol, trimethylphenol, butylphenol, phenylphenol, diphenylphenol, naphthylphenol, resorcinol, methylresorcinol, catechol, butylcatechol, methoxyphenol, methoxyphenol, Although propylphenol, pyrogallol, thymol, etc. are mentioned, it is not specifically limited to these.
- the resin having the structure represented by the above formula (3) may be copolymerized with a polymerizable monomer other than the above-described phenols.
- the copolymerization monomer include naphthol, methylnaphthol, methoxynaphthol, dihydroxynaphthalene, indene, hydroxyindene, benzofuran, hydroxyanthracene, acenaphthylene, biphenyl, bisphenol, trisphenol, dicyclopentadiene, tetrahydroindene, 4-vinylcyclohexene.
- the resin having the structure represented by the above formula (2) is a binary or more (for example, 2-4 quaternary) copolymer of the compound represented by the above formula (1) and the above-described phenols. Even if it is a binary or more (for example, 2-4 quaternary) copolymer of the compound represented by the above formula (1) and the above-mentioned copolymerization monomer, it is represented by the above formula (1). It may be a ternary or more (for example, ternary to quaternary) copolymer of the above compound, the above-mentioned phenols, and the above-mentioned copolymerization monomer.
- the molecular weight of the resin having the structure represented by the above formula (3) is not particularly limited, but the polystyrene equivalent weight average molecular weight (Mw) is preferably 500 to 30,000, more preferably 750 to 20,000. Further, from the viewpoint of increasing the crosslinking efficiency and suppressing the volatile components in the baking, the resin having the structure represented by the above formula (3) has a dispersity (weight average molecular weight Mw / number average molecular weight Mn) of 1.2. It is preferably within the range of ⁇ 7. In addition, said Mw and Mn can be calculated
- the resin having the structure represented by the above formula (3) is preferably highly soluble in a solvent from the viewpoint of easier application of a wet process. More specifically, when 1-methoxy-2-propanol (PGME) and / or propylene glycol monomethyl ether acetate (PGMEA) is used as a solvent, the solubility in the solvent is preferably 10% by mass or more.
- the solubility in PGM and / or PGMEA is defined as “resin mass ⁇ (resin mass + solvent mass) ⁇ 100 (mass%)”.
- the solubility of the resin in PGMEA is “10 mass% or more”, and when it is not dissolved, it is “less than 10 mass%”.
- the compound represented by the formula (0) in the present embodiment is preferably a compound represented by the following formula (2). Since the compound of the present embodiment is a compound represented by the following formula (2), it tends to have high heat resistance and high solvent solubility.
- R 0A is a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 carbon atoms.
- R 1A is an n A valent group having 1 to 60 carbon atoms or a single bond,
- R 2A each independently has an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- the alkyl group, the aryl group, the alkenyl group, and the alkoxy group may include an ether bond, a ketone bond, or an ester bond.
- R 2A includes a group represented by the above formula (0-1).
- n A is an integer of 1 to 4.
- n A when n A is an integer of 2 or more, the structural formulas in n A [] may be the same or different.
- X A each independently represents an oxygen atom, a sulfur atom, or no bridge.
- X A in terms of solubility, it is preferable that the non-crosslinked.
- m 2A is each independently an integer of 0 to 6. However, at least one m 2A is an integer of 1 to 6.
- q A is each independently 0 or 1.
- Examples of the n-valent group include those having a linear hydrocarbon group, a branched hydrocarbon group, or an alicyclic hydrocarbon group.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the n-valent group may have an aromatic group having 6 to 60 carbon atoms.
- the n-valent hydrocarbon group may have an alicyclic hydrocarbon group, a double bond, a hetero atom, or an aromatic group having 6 to 60 carbon atoms.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the n-valent hydrocarbon group may have an alicyclic hydrocarbon group, a double bond, a hetero atom, or an aromatic group having 6 to 30 carbon atoms.
- the alicyclic hydrocarbon group includes a bridged alicyclic hydrocarbon group.
- the compound represented by the above formula (2) has a relatively low molecular weight, but has high heat resistance due to the rigidity of its structure, and therefore can be used under high temperature baking conditions. Moreover, it has tertiary carbon or quaternary carbon in the molecule, the crystallinity is suppressed, and it is suitably used as a film forming composition for lithography that can be used for manufacturing a film for lithography.
- the resist formation composition for lithography containing the compound represented by said Formula (2) can give a favorable resist pattern shape. .
- the film has a relatively low molecular weight and low viscosity, even a substrate having a step (particularly, a fine space or a hole pattern) can be uniformly filled to every corner of the step and the film can be flattened.
- the composition for forming a lower layer film for lithography using the same has good embedding and planarization characteristics.
- it is a compound having a relatively high carbon concentration, high etching resistance can be imparted.
- the aromatic density is high, the refractive index is high, and coloring is suppressed by a wide range of heat treatment from low temperature to high temperature, so that it is useful as a composition for forming various optical parts.
- a compound having a quaternary carbon is preferable from the viewpoint of suppressing oxidative decomposition, suppressing coloring of the compound, high heat resistance, and improving solvent solubility.
- Optical parts are used in the form of films and sheets, as well as plastic lenses (prism lenses, lenticular lenses, micro lenses, Fresnel lenses, viewing angle control lenses, contrast enhancement lenses, etc.), retardation films, electromagnetic wave shielding films, prisms It is useful as an optical fiber, a solder resist for flexible printed wiring, a plating resist, an interlayer insulating film for multilayer printed wiring boards, and a photosensitive optical waveguide.
- the compound represented by the above formula (2) is preferably a compound represented by the following formula (2-1) from the viewpoint of easy crosslinking and solubility in an organic solvent. (2-1)
- R 0A , R 1A , n A , q A and X A have the same meaning as in the above formula (2).
- Each R 3A is independently a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms which may have a substituent, and 6 to 30 carbon atoms which may have a substituent.
- Aryl groups optionally substituted alkenyl groups having 2 to 30 carbon atoms, halogen atoms, nitro groups, amino groups, carboxylic acid groups, and thiol groups, which are the same in the same naphthalene ring or benzene ring. It may or may not be.
- R 4A is each independently a hydrogen atom or a group represented by the following formula (0-2); Here, at least one of R 4A is a group represented by the following formula (0-2), m 6A is each independently an integer of 0 to 5. (0-2) (In formula (0-2), R X has the same meaning as in formula (0-1), and s is an integer of 0 to 30.)
- R 4A is an acid dissociable group.
- R 4A At least one of is a hydrogen atom.
- the compound represented by the above formula (2-1) is preferably a compound represented by the following formula (2a) from the viewpoint of raw material supply.
- the compound represented by the formula (2-1) is more preferably a compound represented by the following formula (2b) from the viewpoint of solubility in an organic solvent.
- X A , R 0A , R 1A , R 3A , R 4A , m 6A and n A are as defined in the above formula (2-1).
- the compound represented by the above formula (2-1) is more preferably a compound represented by the following formula (2c) from the viewpoint of solubility in an organic solvent.
- the compound represented by the above formula (2) has the following formulas (BisN-1) to (BisN-4), (XBisN-1) to (XBisN-3), ( A compound represented by (BiN-1) to (BiN-4) or (XBiN-1) to (XBiN-3) is particularly preferable.
- the compound represented by the formula (2) used in the present embodiment can be appropriately synthesized by applying a known technique, and the synthesis technique is not particularly limited.
- a polyphenol compound is obtained by polycondensation reaction of phenols, naphthols and corresponding aldehydes or ketones under an acid catalyst under normal pressure, and then at least one phenolic hydroxyl group of the polyphenol compound. It can be obtained by introducing a group represented by the following formula (0-1A). Alternatively, it can be obtained by introducing a group represented by the following formula (0-1B) and introducing a group represented by the formula (0-1A) into the hydroxy group. Moreover, it can also carry out under pressure as needed.
- R X represents a hydrogen atom or a methyl group.
- R W is C 1 -C 30 straight, an alkylene group branched or cyclic, s is an integer of 0 to 30.
- the naphthols are not particularly limited and include, for example, naphthol, methyl naphthol, methoxy naphthol, naphthalene diol, and the like. It is more preferable to use naphthalene diol because a xanthene structure can be easily formed.
- the phenols are not particularly limited, and examples thereof include phenol, methylphenol, methoxybenzene, catechol, resorcinol, hydroquinone, and trimethylhydroquinone.
- aldehydes examples include formaldehyde, trioxane, paraformaldehyde, benzaldehyde, acetaldehyde, propylaldehyde, phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, biphenylaldehyde, Examples include naphthaldehyde, anthracene carbaldehyde, phenanthrene carbaldehyde, pyrene carbaldehyde, furfural, and the like, but are not limited thereto.
- benzaldehyde phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, cyclohexylbenzaldehyde, biphenylaldehyde, naphthaldehyde, anthracenecarbaldehyde, phenanthrenecarbaldehyde, pyrenecarboaldehyde It is preferable to use aldehyde or furfural in terms of giving high heat resistance.
- ketones examples include acetone, methyl ethyl ketone, cyclobutanone, cyclopentanone, cyclohexanone, norbornanone, tricyclohexanone, tricyclodecanone, adamantanone, fluorenone, benzofluorenone, acenaphthenequinone, acenaphthenone, anthraquinone, acetophenone, diacetylbenzene.
- Triacetylbenzene Triacetylbenzene, acetonaphthone, diphenylcarbonylnaphthalene, phenylcarbonylbiphenyl, diphenylcarbonylbiphenyl, benzophenone, diphenylcarbonylbenzene, triphenylcarbonylbenzene, benzonaphthone, diphenylcarbonylnaphthalene, phenylcarbonylbiphenyl, diphenylcarbonylbiphenyl, etc. Is particularly limited to There. These can be used alone or in combination of two or more.
- ketones it is preferable to use a ketone having an aromatic ring because it has both high heat resistance and high etching resistance.
- the acid catalyst used in the above reaction can be appropriately selected from known ones and is not particularly limited. It does not specifically limit as an acid catalyst, It can select suitably from a well-known inorganic acid and organic acid.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid; oxalic acid, formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalene
- Organic acids such as sulfonic acid and naphthalenedisulfonic acid
- Lewis acids such as zinc chloride, aluminum chloride, iron chloride, and boron trifluoride
- solid acids such as silicotungstic acid, phosphotungstic acid, silicomolybdic acid, and phosphomolybdic acid It is done. It is preferable to use hydrochloric acid
- a reaction solvent may be used.
- the reaction solvent is not particularly limited as long as the reaction between the aldehyde or ketone to be used and naphthol proceeds, but for example, water, methanol, ethanol, propanol, butanol, tetrahydrofuran, dioxane or a mixed solvent thereof is used. Can do.
- the amount of the solvent is not particularly limited and is, for example, in the range of 0 to 2000 parts by mass with respect to 100 parts by mass of the reaction raw material.
- the reaction temperature is not particularly limited and can be appropriately selected according to the reactivity of the reaction raw material, but is preferably in the range of 10 to 200 ° C. In order to synthesize the polyphenol compound with good selectivity, a lower temperature is more effective and a range of 10 to 60 ° C. is more preferable.
- the production method of the polyphenol compound is not particularly limited, but for example, naphthols, etc., aldehydes or ketones, a method of charging a catalyst in a lump, or a method of dropping naphthols, aldehydes or ketones in the presence of a catalyst There is.
- the temperature of the reaction vessel can be raised to 130-230 ° C. and volatile matter can be removed at about 1-50 mmHg. .
- the amount of the raw material for producing the polyphenol compound is not particularly limited. For example, 2 mol to an excess amount of naphthols and 0.001 to 1 mol of acid catalyst with respect to 1 mol of aldehydes or ketones.
- the reaction proceeds at normal pressure and at 20 to 60 ° C. for about 20 minutes to 100 hours.
- the target product is isolated by a known method after the completion of the reaction.
- the method for isolating the target product is not particularly limited.
- the reaction solution is concentrated, pure water is added to precipitate the reaction product, the solution is cooled to room temperature, filtered, and separated to obtain a solid product. After filtering and drying, a method of separating and purifying from by-products by column chromatography, evaporating the solvent, filtering and drying to obtain the target compound can be mentioned.
- a method for introducing a group represented by the formula (0-1A) into at least one phenolic hydroxyl group of a polyphenol compound is known.
- a group represented by the formula (0-1A) can be introduced into at least one phenolic hydroxyl group of the above compound as follows.
- the compound for introducing the group represented by the formula (0-1A) can be synthesized or easily obtained by a known method, and examples thereof include 2-isocyanatoethyl methacrylate and 2-isocyanatoethyl acrylate. There is no particular limitation to the above.
- the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- the reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary.
- a compound in which the hydrogen atom of the hydroxyl group is substituted with the group represented by the formula (0-1A) can be obtained.
- the timing for introducing the group substituted with the group represented by the formula (0-1A) may be not only after the condensation reaction of binaphthols with aldehydes or ketones, but also before the condensation reaction. Moreover, you may carry out after manufacturing resin mentioned later.
- a group represented by the formula (0-1B) is introduced into at least one phenolic hydroxyl group of the above compound, and a group represented by the formula (0-1A) is added to the hydroxy group. Can be introduced.
- a compound for introducing a group represented by the formula (0-1B) can be synthesized or easily obtained by a known method.
- chloroethanol, bromoethanol, 2-chloroethyl acetate, 2-bromoethyl acetate examples include 2-iodoethyl acetate, ethylene oxide, propylene oxide, butylene oxide, ethylene carbonate, propylene carbonate, and butylene carbonate, but are not particularly limited.
- the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- the reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary.
- a compound in which the hydrogen atom of the hydroxyl group is substituted with the group represented by the formula (0-1B) can be obtained.
- a hydroxyalkyl group is introduced by adding an alkylene carbonate to cause a decarboxylation reaction.
- the above compound is dissolved or suspended in an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- an aprotic solvent such as acetone, tetrahydrofuran (THF), propylene glycol monomethyl ether acetate or the like.
- the reaction is carried out at 20 to 150 ° C. for 6 to 72 hours at normal pressure in the presence of a base catalyst such as sodium hydroxide, potassium hydroxide, sodium methoxide, sodium ethoxide and the like.
- the reaction solution is neutralized with an acid and added to distilled water to precipitate a white solid, and then the separated solid is washed with distilled water, or the solvent is evaporated to dryness, and washed with distilled water as necessary.
- a compound in which the hydrogen atom of the hydroxy group is substituted with a group substituted with a group represented by the formula (0-1A) can be obtained.
- the group substituted with the group represented by the formula (0-1A) reacts in the presence of a radical or an acid / alkali, and the acid, alkali, or organic used in the coating solvent or developer. Solubility in solvent changes.
- the group substituted with the group represented by the above formula (0-1A) causes a chain reaction in the presence of a radical or an acid / alkali in order to enable pattern formation with higher sensitivity and higher resolution. It preferably has properties.
- the compound represented by the above formula (2) can be used as it is as a film forming composition for lithography or a composition used for forming an optical component.
- a resin obtained using the compound represented by the above formula (2) as a monomer can be used as a composition.
- the resin can be used, for example, as a resin obtained by reacting a compound represented by the above formula (2) with a compound having a crosslinking reactivity.
- the resin obtained using the compound represented by the above formula (2) as a monomer examples include those having a structure represented by the following formula (4). That is, the film forming composition for lithography of the present embodiment may contain a resin having a structure represented by the following formula (4).
- L has an optionally substituted alkylene group having 1 to 30 carbon atoms, an optionally substituted arylene group having 6 to 30 carbon atoms, and a substituent.
- the alkylene group, the arylene group, and the alkoxylene group may have an ether bond, a ketone bond, or an ester bond.
- the alkylene group and alkoxylene group may be a linear, branched or cyclic group.
- R 0A has the same meaning as R Y described above, R 1A is an n A valent group having 1 to 30 carbon atoms or a single bond, R 2A each independently has an optionally substituted alkyl group having 1 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, or a substituent.
- the hydrogen atom is substituted with a group represented by the above formula (0-1)
- the alkyl group, the aryl group, the alkenyl group, and the alkoxy group each have an ether bond, a ketone bond, or an ester bond.
- at least one of R 2A includes a group represented by the above formula (0-1)
- n A has the same meaning as N above.
- n A is an integer of 2 or more
- the structural formulas in n A [] may be the same or different
- X A represents an oxygen atom, a sulfur atom, or no bridge
- m 2A is each independently an integer of 0 to 7, provided that at least one m 2A is an integer of 1 to 6
- q A is each independently 0 or 1.
- the resin of the present embodiment can be obtained by reacting the compound represented by the above formula (2) with a compound having crosslinking reactivity.
- a known compound can be used without particular limitation as long as the compound represented by the above formula (2) can be oligomerized or polymerized.
- Specific examples thereof include, but are not limited to, aldehydes, ketones, carboxylic acids, carboxylic acid halides, halogen-containing compounds, amino compounds, imino compounds, isocyanates, unsaturated hydrocarbon group-containing compounds, and the like.
- the resin having the structure represented by the above formula (4) include, for example, a condensation reaction of the compound represented by the above formula (2) with an aldehyde and / or a ketone having a crosslinking reactivity, etc. And a novolak resin.
- aldehyde for example, formaldehyde, trioxane, paraformaldehyde, benzaldehyde, acetaldehyde, propylaldehyde, phenylacetaldehyde, phenylpropylaldehyde, hydroxybenzaldehyde
- examples thereof include, but are not limited to, chlorobenzaldehyde, nitrobenzaldehyde, methylbenzaldehyde, ethylbenzaldehyde, butylbenzaldehyde, biphenylaldehyde, naphthaldehyde, anthracenecarbaldehyde, phenanthrenecarbaldehyde, pyrenecarbaldehyde, and furfural.
- ketones include the above ketones. Among these, formaldehyde is more preferable. In addition, these aldehydes and / or ketones can be used individually by 1 type or in combination of 2 or more types.
- the amount of the aldehyde and / or ketone used is not particularly limited, but is preferably 0.2 to 5 mol, more preferably 1 mol with respect to 1 mol of the compound represented by the formula (2). 0.5 to 2 moles.
- an acid catalyst can be used.
- the acid catalyst used here can be appropriately selected from known ones and is not particularly limited.
- As such an acid catalyst inorganic acids and organic acids are widely known.
- inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid; oxalic acid, malonic acid, succinic acid, Adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid,
- organic acids such as naphthalenedisulfonic acid
- Lewis acids such as zinc chloride, aluminum chloride, iron chloride, and boron trifluoride
- solid acids such as silicotungstic acid, phosphotungstic acid, silicomolybdic acid, and phosphomolybdic acid.
- an organic acid or a solid acid is preferable from the viewpoint of manufacturing, and hydrochloric acid or sulfuric acid is preferable from the viewpoint of manufacturing such as availability and ease of handling.
- an acid catalyst 1 type can be used individually or in combination of 2 or more types.
- the amount of the acid catalyst used can be appropriately set according to the raw material to be used, the type of catalyst to be used, and further the reaction conditions, and is not particularly limited. It is preferable that it is a mass part.
- aldehydes are not necessarily required.
- reaction solvent in the condensation reaction between the compound represented by the above formula (2) and the aldehyde and / or ketone, a reaction solvent can also be used.
- the reaction solvent in this polycondensation can be appropriately selected from known solvents and is not particularly limited. Examples thereof include water, methanol, ethanol, propanol, butanol, tetrahydrofuran, dioxane, and mixed solvents thereof. Can be mentioned.
- a solvent can be used individually by 1 type or in combination of 2 or more types.
- the amount of these solvents used can be appropriately set according to the raw materials used, the type of catalyst used, and the reaction conditions, and is not particularly limited, but is 0 to 2000 parts by mass with respect to 100 parts by mass of the reaction raw materials. It is preferable that it is the range of these.
- the reaction temperature can be appropriately selected according to the reactivity of the reaction raw material, and is not particularly limited, but is usually in the range of 10 to 200 ° C.
- the reaction method can be appropriately selected from known methods and is not particularly limited.
- reaction method may be a method in which the compound represented by the above formula (2), the aldehyde and / or ketone, and a catalyst are charged together, The method of dripping the compound represented by the said Formula (2), an aldehyde, and / or ketones in catalyst presence is mentioned.
- the obtained compound can be isolated according to a conventional method, and is not particularly limited.
- a general method is adopted such as raising the temperature of the reaction vessel to 130-230 ° C. and removing volatile components at about 1-50 mmHg.
- the novolak resin as the target product can be isolated.
- the resin having the structure represented by the above formula (4) may be a homopolymer of the compound represented by the above formula (2), but is a copolymer with other phenols. May be.
- the copolymerizable phenols include phenol, cresol, dimethylphenol, trimethylphenol, butylphenol, phenylphenol, diphenylphenol, naphthylphenol, resorcinol, methylresorcinol, catechol, butylcatechol, methoxyphenol, methoxyphenol, Although propylphenol, pyrogallol, thymol, etc. are mentioned, it is not specifically limited to these.
- the resin having the structure represented by the above formula (4) may be copolymerized with a polymerizable monomer in addition to the above-described other phenols.
- the copolymerization monomer include naphthol, methylnaphthol, methoxynaphthol, dihydroxynaphthalene, indene, hydroxyindene, benzofuran, hydroxyanthracene, acenaphthylene, biphenyl, bisphenol, trisphenol, dicyclopentadiene, tetrahydroindene, 4-vinylcyclohexene.
- the resin having the structure represented by the above formula (4) is a binary or more (for example, 2-4 quaternary) copolymer of the compound represented by the above formula (2) and the above-described phenols. Even if it is a binary or more (for example, 2-4 quaternary) copolymer of the compound represented by the above formula (2) and the above-mentioned copolymerization monomer, it is represented by the above formula (2). It may be a ternary or more (for example, ternary to quaternary) copolymer of the above compound, the above-mentioned phenols, and the above-mentioned copolymerization monomer.
- the molecular weight of the resin having the structure represented by the above formula (4) is not particularly limited, but the polystyrene equivalent weight average molecular weight (Mw) is preferably from 500 to 30,000, more preferably from 750 to 20,000. Further, from the viewpoint of increasing the crosslinking efficiency and suppressing the volatile components in the baking, the resin having the structure represented by the above formula (4) has a dispersity (weight average molecular weight Mw / number average molecular weight Mn) of 1.2. It is preferably within the range of ⁇ 7. In addition, said Mw and Mn can be calculated
- the resin having the structure represented by the above formula (4) is preferably one having high solubility in a solvent from the viewpoint of easier application of a wet process. More specifically, when 1-methoxy-2-propanol (PGME) and / or propylene glycol monomethyl ether acetate (PGMEA) is used as a solvent, the solubility in the solvent is preferably 10% by mass or more.
- the solubility in PGM and / or PGMEA is defined as “resin mass ⁇ (resin mass + solvent mass) ⁇ 100 (mass%)”.
- the solubility of the resin in PGMEA is “10 mass% or more”, and when it is not dissolved, it is “less than 10 mass%”.
- the compound and / or resin purification method of the present embodiment is represented by the compound represented by the above formula (1), the resin obtained by using the compound represented by the above formula (1) as a monomer, and the above formula (2). And a step of obtaining a solution (S) by dissolving in a solvent one or more selected from a compound obtained by using a compound represented by formula (2) and a compound represented by the above formula (2) as a monomer, and the obtained solution (S) and acidity A solvent used in the step of obtaining the solution (S) is optionally mixed with water.
- the step of extracting the impurities in the compound and / or the resin Does not contain organic solvents.
- the resin is a resin obtained by a reaction between the compound represented by the formula (1) and / or the compound represented by the formula (2) and a compound having a crosslinking reaction. Is preferred. According to the purification method of the present embodiment, the content of various metals that can be contained as impurities in the compound or resin having the specific structure described above can be reduced.
- the compound and / or the resin is dissolved in an organic solvent that is arbitrarily immiscible with water to obtain a solution (S), and the solution (S) is further obtained.
- the extraction treatment can be performed in contact with an acidic aqueous solution. Thereby, after transferring the metal content contained in the solution (S) to the aqueous phase, the organic phase and the aqueous phase can be separated to obtain a compound and / or resin having a reduced metal content.
- the compound and / or resin used in the purification method of the present embodiment may be used alone or in combination of two or more.
- the said compound and resin may contain various surfactant, various crosslinking agents, various acid generators, various stabilizers, etc.
- the solvent that is not arbitrarily miscible with water used in the present embodiment is not particularly limited, but an organic solvent that can be safely applied to a semiconductor manufacturing process is preferable. Specifically, the solubility in water at room temperature is 30%.
- the organic solvent is less than, more preferably less than 20%, and even more preferably less than 10%.
- the amount of the organic solvent used is preferably 1 to 100 times by mass with respect to the total amount of the compound to be used and the resin.
- ethers such as diethyl ether and diisopropyl ether
- esters such as ethyl acetate, n-butyl acetate, and isoamyl acetate, methyl ethyl ketone, and methyl isobutyl.
- Ketones such as ketone, ethyl isobutyl ketone, cyclohexanone, cyclopentanone, 2-heptanone, 2-pentanone; ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monoethyl Glycol ether acetates such as ether acetate; Aliphatic hydrocarbons such as n-hexane and n-heptane; Aromatic hydrocarbons such as toluene and xylene Methylene chloride, halogenated hydrocarbons such as chloroform and the like.
- toluene, 2-heptanone, cyclohexanone, cyclopentanone, methyl isobutyl ketone, propylene glycol monomethyl ether acetate, ethyl acetate and the like are preferable, methyl isobutyl ketone, ethyl acetate, cyclohexanone, propylene glycol monomethyl ether acetate are more preferable, More preferred are methyl isobutyl ketone and ethyl acetate. Methyl isobutyl ketone, ethyl acetate, etc.
- solvents are removed when the solvent is industrially distilled off or dried because the above compound and the resin containing the compound as a constituent component have a relatively high saturation solubility and a relatively low boiling point. It is possible to reduce the load in the process.
- These solvents can be used alone or in combination of two or more.
- the acidic aqueous solution used in the purification method of the present embodiment is appropriately selected from aqueous solutions in which generally known organic compounds or inorganic compounds are dissolved in water.
- the acidic aqueous solution is not limited to the following. Examples include organic acid aqueous solutions in which organic acids such as fumaric acid, maleic acid, tartaric acid, citric acid, methanesulfonic acid, phenolsulfonic acid, p-toluenesulfonic acid, and trifluoroacetic acid are dissolved in water. These acidic aqueous solutions can be used alone or in combination of two or more.
- one or more mineral acid aqueous solutions selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, or acetic acid, propionic acid, succinic acid, malonic acid, succinic acid, fumaric acid, maleic acid,
- One or more organic acid aqueous solutions selected from the group consisting of tartaric acid, citric acid, methanesulfonic acid, phenolsulfonic acid, p-toluenesulfonic acid and trifluoroacetic acid are preferred, and sulfuric acid, nitric acid, acetic acid, oxalic acid,
- An aqueous solution of carboxylic acid such as tartaric acid and citric acid is more preferable, an aqueous solution of sulfuric acid, succinic acid, tartaric acid and citric acid is more preferable, and an aqueous solution of succinic acid is more preferable.
- the pH of the acidic aqueous solution used in the purification method of the present embodiment is not particularly limited, but it is preferable to adjust the acidity of the aqueous solution in consideration of the effects on the above-mentioned compounds and resins.
- the pH of the acidic aqueous solution is preferably about 0 to 5, more preferably about 0 to 3.
- the amount of acidic aqueous solution used in the purification method of the present embodiment is not particularly limited, but from the viewpoint of reducing the number of extractions for metal removal and securing the operability in consideration of the total liquid amount, It is preferable to adjust the amount used. From the above viewpoint, the amount of the acidic aqueous solution used is preferably 10 to 200% by mass, and more preferably 20 to 100% by mass with respect to 100% by mass of the solution (S).
- the metal component can be extracted from the compound or the resin in the solution (S) by bringing the acidic aqueous solution into contact with the solution (S).
- the solution (S) further includes an organic solvent arbitrarily mixed with water.
- the solution (S) contains an organic solvent that is arbitrarily miscible with water, the amount of the compound and / or resin charged can be increased, the liquid separation property is improved, and purification is performed with high pot efficiency. There is a tendency to be able to.
- the method for adding an organic solvent arbitrarily mixed with water is not particularly limited. For example, any of a method of adding to a solution containing an organic solvent in advance, a method of adding to water or an acidic aqueous solution in advance, and a method of adding after bringing a solution containing an organic solvent into contact with water or an acidic aqueous solution may be used. Among these, the method of adding to the solution containing an organic solvent in advance is preferable from the viewpoint of the workability of the operation and the ease of management of the charged amount.
- the organic solvent arbitrarily mixed with water used in the purification method of the present embodiment is not particularly limited, but an organic solvent that can be safely applied to a semiconductor manufacturing process is preferable.
- the amount of the organic solvent arbitrarily mixed with water is not particularly limited as long as the solution phase and the aqueous phase are separated from each other, but is 0.1 to 100 times by mass with respect to the total amount of the compound and the resin to be used. It is preferably 0.1 to 50 times by mass, more preferably 0.1 to 20 times by mass.
- organic solvent arbitrarily mixed with water used in the purification method of the present embodiment include, but are not limited to, ethers such as tetrahydrofuran and 1,3-dioxolane; alcohols such as methanol, ethanol and isopropanol Ketones such as acetone and N-methylpyrrolidone; aliphatic hydrocarbons such as glycol ethers such as ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether (PGME) and propylene glycol monoethyl ether Can be mentioned.
- ethers such as tetrahydrofuran and 1,3-dioxolane
- alcohols such as methanol, ethanol and isopropanol Ketones such as acetone and N-methylpyrrolidone
- aliphatic hydrocarbons such as glycol ethers such as ethylene glycol monoethyl ether, ethylene glycol monobutyl
- N-methylpyrrolidone, propylene glycol monomethyl ether and the like are preferable, and N-methylpyrrolidone and propylene glycol monomethyl ether are more preferable.
- These solvents can be used alone or in combination of two or more.
- the temperature at the time of the extraction treatment is usually 20 to 90 ° C, preferably 30 to 80 ° C.
- the extraction operation is performed, for example, by mixing the mixture well by stirring or the like and then allowing it to stand. Thereby, the metal part contained in solution (S) transfers to an aqueous phase. Moreover, the acidity of a solution falls by this operation and the quality change of a compound and / or resin can be suppressed.
- the solution phase is recovered by decantation or the like.
- the standing time is not particularly limited, but it is preferable to adjust the standing time from the viewpoint of improving the separation between the solvent-containing solution phase and the aqueous phase.
- the time for standing is 1 minute or longer, preferably 10 minutes or longer, more preferably 30 minutes or longer.
- the extraction process may be performed only once, but it is also effective to repeat the operations of mixing, standing, and separation a plurality of times.
- the solution phase containing the compound or the resin is further brought into contact with water to extract impurities in the compound or the resin (second extraction step). )
- the solution phase containing the compound and / or resin and solvent extracted and recovered from the aqueous solution is further subjected to extraction treatment with water. It is preferable.
- the extraction treatment with water is not particularly limited. For example, after the solution phase and water are mixed well by stirring or the like, the obtained mixed solution can be left still. Since the mixed solution after standing is separated into a solution phase containing a compound and / or a resin and a solvent and an aqueous phase, the solution phase can be recovered by decantation or the like.
- the water used here is preferably water having a low metal content, for example, ion-exchanged water, in accordance with the purpose of the present embodiment.
- the extraction process may be performed only once, but it is also effective to repeat the operations of mixing, standing, and separation a plurality of times. Further, the use ratio of both in the extraction process, conditions such as temperature and time are not particularly limited, but they may be the same as those in the contact process with the acidic aqueous solution.
- the water that can be mixed into the solution containing the compound and / or resin and solvent thus obtained can be easily removed by performing an operation such as vacuum distillation. Further, if necessary, a solvent can be added to the above solution to adjust the concentration of the compound and / or resin to an arbitrary concentration.
- the method for isolating the compound and / or resin from the solution containing the obtained compound and / or resin and solvent is not particularly limited, and known methods such as removal under reduced pressure, separation by reprecipitation, and combinations thereof. Can be done. If necessary, known processes such as a concentration operation, a filtration operation, a centrifugal separation operation, and a drying operation can be performed.
- composition of the present embodiment includes a compound represented by the above formula (1), a resin obtained using the compound represented by the above formula (1) as a monomer, a compound represented by the above formula (2), and the above formula ( 1 or more types chosen from the group which consists of resin obtained by using the compound represented by 2) as a monomer are contained.
- the composition of this embodiment can be a film-forming composition for lithography or an optical component-forming composition.
- the film forming composition for lithography for chemical amplification resist application in the present embodiment (hereinafter also referred to as “resist composition”) is represented by the compound represented by the above formula (1) and the above formula (1).
- the composition (resist composition) of this embodiment further contains a solvent.
- the solvent include, but are not limited to, ethylene glycol monoalkyl ether acetates such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol mono-n-propyl ether acetate, and ethylene glycol mono-n-butyl ether acetate.
- Ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether; propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monoethyl ether acetate, propylene glycol mono-n-propyl ether acetate, propylene glycol mono -Propylene glycol such as n-butyl ether acetate Monoalkyl ether acetates; propylene glycol monoalkyl ethers such as propylene glycol monomethyl ether (PGME) and propylene glycol monoethyl ether; methyl lactate, ethyl lactate, n-propyl lactate, n-butyl lactate, n-amyl lactate, etc.
- PGMEA propylene glycol monomethyl ether acetate
- PGMEA propylene glycol monoethyl ether acetate
- Lactate esters aliphatic carboxylic acid esters such as methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate, n-amyl acetate, n-hexyl acetate, methyl propionate, ethyl propionate; Methyl propionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl 3-methoxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl A
- Other esters such as tate, butyl 3-methoxy-3-methylpropionate, butyl 3-methoxy-3-methylbutyrate, methyl acetoacetate, methyl pyruvate, ethyl pyruvate; aromatic hydrocarbons such as toluene, xylene Ketones such as 2-h
- the solvent used in this embodiment is preferably a safe solvent, more preferably at least one selected from PGMEA, PGME, CHN, CPN, 2-heptanone, anisole, butyl acetate, ethyl propionate and ethyl lactate.
- a seed more preferably at least one selected from PGMEA, PGME and CHN.
- the amount of the solid component and the amount of the solvent are not particularly limited, but 1 to 80% by weight of the solid component and 20 to 99% of the solvent with respect to 100% by weight of the total amount of the solid component and the solvent.
- the solid component is preferably 1 to 50% by mass, more preferably 1 to 50% by mass of the solid component and 50 to 99% by mass of the solvent, further preferably 2 to 40% by mass of the solid component and 60 to 98% by mass of the solvent, and particularly preferably solid
- the component is 2 to 10% by mass and the solvent is 90 to 98% by mass.
- composition (resist composition) of the present embodiment is selected from the group consisting of an acid generator (C), a crosslinking agent (G), an acid diffusion controller (E), and other components (F) as other solid components. You may further contain at least 1 type chosen.
- a solid component means components other than a solvent.
- the acid generator (C), the crosslinking agent (G), the acid diffusion controller (E) and other components (F), known ones can be used, and are not particularly limited. Those described in Japanese Patent No. / 024778 are preferable.
- the content of the compound and / or resin used as the resist base material is not particularly limited, but the total mass of the solid component (resist base material, acid generator (C), crosslinking agent (G ), Acid diffusion controller (E) and other components (F) and the like, and the total amount of solid components including the optionally used components, the same shall apply hereinafter)).
- the amount is preferably 55 to 90% by mass, more preferably 60 to 80% by mass, and particularly preferably 60 to 70% by mass.
- the content of the compound and / or resin used as the resist base is in the above range, the resolution is further improved and the line edge roughness (LER) tends to be further reduced.
- the said content is a total amount of both components.
- another component (F) may be called arbitrary component (F).
- a resist base material hereinafter also referred to as “component (A)”
- an acid generator C
- a crosslinking agent G
- an acid diffusion controller E
- an optional component The content of F (component (A) / acid generator (C) / crosslinking agent (G) / acid diffusion controller (E) / optional component (F)) is mass% based on solids, Preferably 50 to 99.4 / 0.001 to 49 / 0.5 to 49 / 0.001 to 49/0 to 49, More preferably 55 to 90/1 to 40 / 0.5 to 40 / 0.01 to 10/0 to 5, More preferably 60 to 80/3 to 30/1 to 30 / 0.01 to 5/0 to 1, Particularly preferred is 60 to 70/10 to 25/2 to 20 / 0.01 to 3/0.
- the blending ratio of each component is selected from each range so that the sum is 100% by mass. When the blending ratio of each component is within the above range, the performance such as sensitivity, resolution, develop
- the resist composition of this embodiment is usually prepared by dissolving each component in a solvent at the time of use to make a uniform solution, and then filtering with a filter having a pore size of about 0.2 ⁇ m, if necessary.
- the resist composition of the present embodiment can contain other resins other than the resin of the present embodiment as long as the object of the present invention is not impaired.
- Other resins are not particularly limited.
- novolak resins polyvinylphenols, polyacrylic acid, polyvinyl alcohol, styrene-maleic anhydride resins, and acrylic acid, vinyl alcohol, or vinylphenol as monomer units. Examples thereof include polymers or derivatives thereof.
- the content of other resins is not particularly limited and is appropriately adjusted according to the type of component (A) to be used, but is preferably 30 parts by mass or less with respect to 100 parts by mass of component (A). More preferably, it is 10 mass parts or less, More preferably, it is 5 mass parts or less, Most preferably, it is 0 mass part.
- An amorphous film can be formed by spin coating using the resist composition of the present embodiment.
- the resist composition of this embodiment can be applied to a general semiconductor manufacturing process.
- the type of resin obtained using these as monomers and / or the type of developer used either a positive resist pattern or a negative resist pattern is used. Can be made separately.
- the dissolution rate of the amorphous film formed by spin-coating the resist composition of the present embodiment with respect to the developer at 23 ° C. is preferably 5 ⁇ / sec or less, and 0.05 to 5 ⁇ / It is more preferable that it is sec, and it is more preferable that it is 0.0005 to 5 cm / sec.
- the dissolution rate is 5 kg / sec or less, the resist is insoluble in the developer and can be a resist. Further, when the dissolution rate is 0.0005 K / sec or more, the resolution tends to be improved.
- the dissolution rate of the amorphous film formed by spin-coating the resist composition of the present embodiment in a developing solution at 23 ° C. is preferably 10 ⁇ / sec or more.
- the dissolution rate is 10 ⁇ / sec or more, it is easily dissolved in a developer and more suitable for a resist.
- the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. This is presumably because the compound represented by the above formula (1) and / or the micro surface portion of the resin containing the compound as a constituent component dissolves and LER is reduced. There is also an effect of reducing defects.
- the dissolution rate can be determined by immersing the amorphous film in a developing solution at 23 ° C. for a predetermined time, and measuring the film thickness before and after the immersion by a known method such as visual observation, an ellipsometer, or a QCM method.
- a portion exposed to radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray of an amorphous film formed by spin-coating the resist composition of this embodiment is applied to a developer at 23 ° C.
- the dissolution rate is preferably 10 ⁇ / sec or more.
- the dissolution rate is 10 ⁇ / sec or more, it is easily dissolved in a developer and more suitable for a resist.
- the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. This is presumably because the compound represented by the above formulas (1) and (2) and / or the micro surface portion of the resin containing the compound as a constituent component dissolves to reduce LER. There is also an effect of reducing defects.
- the amorphous film formed by spin-coating the resist composition of the present embodiment is exposed to a developer at 23 ° C. at a portion exposed by radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray.
- the dissolution rate is preferably 5 ⁇ / sec or less, more preferably 0.05 to 5 ⁇ / sec, and further preferably 0.0005 to 5 ⁇ / sec.
- the dissolution rate is 5 kg / sec or less, the resist is insoluble in the developer and can be a resist.
- the dissolution rate is 0.0005 kg / sec or more, the resolution may be improved.
- the component (A) contained in the film forming composition for lithography for non-chemically amplified resist application of the present embodiment is a diazonaphthoquinone photoactive compound (B) described later.
- a positive resist base material that is easily soluble in a developer by irradiating g-line, h-line, i-line, KrF excimer laser, ArF excimer laser, extreme ultraviolet light, electron beam or X-ray. Useful as.
- the component (A) contained in the radiation-sensitive composition of the present embodiment is a compound having a relatively low molecular weight, the roughness of the obtained resist pattern is very small.
- at least one selected from the group consisting of R 0 to R 5 is preferably a group containing an iodine atom.
- R 0A , R 1A and R 2A are preferable. It is preferable that at least one selected from the group consisting of is a group containing an iodine atom.
- the radiation-sensitive composition is resistant to radiation such as electron beams, extreme ultraviolet rays (EUV), and X-rays. It is preferable because the absorption capacity can be increased, and as a result, the sensitivity can be increased.
- EUV extreme ultraviolet rays
- the glass transition temperature of the component (A) contained in the radiation-sensitive composition of the present embodiment is preferably 100 ° C. or higher, more preferably 120 ° C. or higher, further preferably 140 ° C. or higher, and particularly preferably 150 ° C. or higher.
- the upper limit of the glass transition temperature of a component (A) is not specifically limited, For example, it is 400 degreeC.
- the semiconductor lithography process has heat resistance capable of maintaining the pattern shape and tends to improve performance such as high resolution.
- the crystallization calorific value obtained by differential scanning calorimetry analysis of the glass transition temperature of the component (A) contained in the radiation-sensitive composition of the present embodiment is preferably less than 20 J / g.
- (crystallization temperature) ⁇ glass transition temperature is preferably 70 ° C. or higher, more preferably 80 ° C. or higher, still more preferably 100 ° C. or higher, and particularly preferably 130 ° C. or higher.
- crystallization heat generation amount is less than 20 J / g, or (crystallization temperature) ⁇ (glass transition temperature) is within the above range, an amorphous film can be easily formed by spin-coating the radiation-sensitive composition, and The film formability required for the resist can be maintained for a long time, and the resolution tends to be improved.
- the crystallization heat generation amount, the crystallization temperature, and the glass transition temperature can be obtained by differential scanning calorimetry using DSC / TA-50WS manufactured by Shimadzu Corporation.
- About 10 mg of a sample is put into an aluminum non-sealed container and heated to a melting point or higher at a temperature rising rate of 20 ° C./min in a nitrogen gas stream (50 mL / min).
- the temperature is raised again to the melting point or higher at a temperature rising rate of 20 ° C./min in a nitrogen gas stream (30 mL / min). Further, after rapid cooling, the temperature is increased again to 400 ° C.
- the temperature at the midpoint of the step difference of the baseline that has changed in a step shape is the glass transition temperature (Tg), and the temperature of the exothermic peak that appears thereafter is the crystallization temperature.
- Tg glass transition temperature
- the calorific value is obtained from the area of the region surrounded by the exothermic peak and the baseline, and is defined as the crystallization calorific value.
- the component (A) contained in the radiation-sensitive composition of the present embodiment is 100 or less, preferably 120 ° C. or less, more preferably 130 ° C. or less, further preferably 140 ° C. or less, and particularly preferably 150 ° C. or less under normal pressure. It is preferable that sublimability is low. Low sublimation means that, in thermogravimetric analysis, the weight loss when held at a predetermined temperature for 10 minutes is 10% or less, preferably 5% or less, more preferably 3% or less, even more preferably 1% or less, particularly preferably Indicates 0.1% or less. Since the sublimation property is low, it is possible to prevent exposure apparatus from being contaminated by outgas during exposure. In addition, a good pattern shape can be obtained with low roughness.
- Component (A) contained in the radiation-sensitive composition of the present embodiment is propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monomethyl ether (PGME), cyclohexanone (CHN), cyclopentanone (CPN), 2-heptanone Selected from the group consisting of anisole, butyl acetate, ethyl propionate and ethyl lactate and having the highest solubility in component (A) at 23 ° C., preferably 1% by mass or more, more preferably Dissolves in an amount of 5 mass% or more, more preferably 10 mass% or more.
- it is selected from the group consisting of PGMEA, PGME, and CHN, and (A) a solvent having the highest solubility in the resist base material at 23 ° C., 20 mass% or more, and particularly preferably PGMEA On the other hand, 20 mass% or more dissolves at 23 ° C.
- the diazonaphthoquinone photoactive compound (B) to be contained in the radiation-sensitive composition of the present embodiment is a diazonaphthoquinone substance containing a polymeric and non-polymeric diazonaphthoquinone photoactive compound, and in general in a positive resist composition, As long as it is used as a photosensitive component (photosensitive agent), one type or two or more types can be arbitrarily selected and used without any limitation.
- Component (B) is a compound obtained by reacting naphthoquinone diazide sulfonic acid chloride, benzoquinone diazide sulfonic acid chloride, etc., with a low molecular compound or polymer compound having a functional group capable of condensation reaction with these acid chlorides.
- the functional group capable of condensing with acid chloride is not particularly limited, and examples thereof include a hydroxyl group and an amino group, and a hydroxyl group is particularly preferable.
- the compound capable of condensing with an acid chloride containing a hydroxyl group is not particularly limited.
- hydroquinone, resorcin, 2,4-dihydroxybenzophenone, 2,3,4-trihydroxybenzophenone, 2,4,6-trihydroxybenzophenone, 2,4,4'-trihydroxybenzophenone, 2,3,4,4'-tetrahydroxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2', 3,4,6'- Hydroxybenzophenones such as pentahydroxybenzophenone, hydroxyphenylalkanes such as bis (2,4-dihydroxyphenyl) methane, bis (2,3,4-trihydroxyphenyl) methane, bis (2,4-dihydroxyphenyl) propane 4,4 ', 3 ", 4" -tetrahydroxy -3, 5, 3 ', 5'-tetramethyltriphenylmethane, 4, 4', 2 ", 3", 4 "-pentahydroxy-3, 5, 3 ', 5'-tetramethyltriphenylmethane, etc.
- acid chlorides such as naphthoquinone diazide sulfonic acid chloride and benzoquinone diazide sulfonic acid chloride include 1,2-naphthoquinone diazide-5-sulfonyl chloride, 1,2-naphthoquinone diazide-4-sulfonyl chloride, and the like. Can be mentioned.
- the radiation-sensitive composition of the present embodiment is prepared, for example, by dissolving each component in a solvent at the time of use to obtain a uniform solution, and then filtering, for example, with a filter having a pore size of about 0.2 ⁇ m as necessary. It is preferred that
- the radiation sensitive composition of this embodiment can form an amorphous film by spin coating. Moreover, the radiation sensitive composition of this embodiment can be applied to a general semiconductor manufacturing process. Depending on the type of developer used, either a positive resist pattern or a negative resist pattern can be created.
- the dissolution rate of the amorphous film formed by spin-coating the radiation-sensitive composition of this embodiment at 23 ° C. with respect to the developing solution is preferably 5 ⁇ / sec or less, and 0.05 to More preferably, it is 5 ⁇ / sec, and further preferably 0.0005 to 5 ⁇ / sec.
- the dissolution rate is 5 kg / sec or less, the resist is insoluble in the developer and can be a resist. Further, when the dissolution rate is 0.0005 K / sec or more, the resolution tends to be improved.
- the dissolution rate of the amorphous film formed by spin-coating the radiation-sensitive composition of the present embodiment in a developing solution at 23 ° C. is preferably 10 ⁇ / sec or more.
- the dissolution rate is 10 ⁇ / sec or more, it is easily dissolved in a developer and more suitable for a resist.
- the dissolution rate is 10 ⁇ / sec or more, the resolution may be improved. This is presumably because the compound represented by the above formulas (1) and (2) and / or the micro surface portion of the resin containing the compound as a constituent component dissolves to reduce LER. There is also an effect of reducing defects.
- the dissolution rate can be determined by immersing the amorphous film in a developing solution at 23 ° C. for a predetermined time, and measuring the film thickness before and after the immersion by a known method such as visual observation, an ellipsometer, or a QCM method.
- the amorphous film formed by spin-coating the radiation-sensitive composition of this embodiment is irradiated with radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray, or 20 to
- the dissolution rate of the exposed portion after heating at 500 ° C. in the developer at 23 ° C. is preferably 10 ⁇ / sec or more, more preferably from 10 to 10000 ⁇ / sec, and from 100 to 1000 ⁇ / sec. More preferably it is.
- the dissolution rate is 10 ⁇ / sec or more, it is easily dissolved in a developer and more suitable for a resist.
- the dissolution rate is 10000 kg / sec or less, the resolution may be improved. This is presumably because the compound represented by the above formulas (1) and (2) and / or the micro surface portion of the resin containing the compound as a constituent component dissolves to reduce LER. There is also a tendency to reduce defects.
- the amorphous film formed by spin-coating the radiation-sensitive composition of the present embodiment is irradiated with radiation such as KrF excimer laser, extreme ultraviolet light, electron beam or X-ray, or 20 to
- the dissolution rate of the exposed portion after heating at 500 ° C. with respect to the developer at 23 ° C. is preferably 5 K / sec or less, more preferably from 0.05 to 5 K / sec, more preferably from 0.0005 to More preferably, it is 5 kg / sec.
- the dissolution rate is 5 kg / sec or less, the resist is insoluble in the developer and can be a resist. Further, when the dissolution rate is 0.0005 kg / sec or more, the resolution may be improved.
- the content of the component (A) is arbitrarily selected from the total weight of the solid component (component (A), diazonaphthoquinone photoactive compound (B), and other components (D)).
- the total of the solid components to be used is preferably 1 to 99% by mass, more preferably 5 to 95% by mass, still more preferably 10 to 90% by mass, and particularly preferably 25 to 75% by mass. %.
- the radiation-sensitive composition of the present embodiment tends to obtain a pattern with high sensitivity and small roughness.
- the content of the diazonaphthoquinone photoactive compound (B) is the total weight of the solid component (component (A), diazonaphthoquinone photoactive compound (B) and other components (D), etc.)
- the total of solid components optionally used in the following, the same shall apply hereinafter) is preferably 1 to 99% by mass, more preferably 5 to 95% by mass, still more preferably 10 to 90% by mass, and particularly preferably. 25 to 75% by mass.
- the radiation-sensitive composition of the present embodiment tends to obtain a highly sensitive and small roughness pattern.
- an acid generator, a cross-linkage, and a component other than the component (A) and the diazonaphthoquinone photoactive compound (B) are included as necessary, as long as the object of the present invention is not impaired.
- Agent acid diffusion controller, dissolution accelerator, dissolution controller, sensitizer, surfactant, organic carboxylic acid or phosphorus oxo acid or derivative thereof, heat and / or photocuring catalyst, polymerization inhibitor, flame retardant, Fillers, coupling agents, thermosetting resins, photocurable resins, dyes, pigments, thickeners, lubricants, antifoaming agents, leveling agents, UV absorbers, surfactants, colorants, nonionic surfactants 1 type, or 2 or more types can be added.
- another component (D) may be called arbitrary component (D).
- the blending ratio of each component is mass% based on the solid component, Preferably 1 to 99/99 to 1/0 to 98, More preferably 5 to 95/95 to 5/0 to 49, More preferably, 10 to 90/90 to 10/0 to 10, Even more preferably, 20-80 / 80-20 / 0-5, Even more preferably, it is 25 to 75/75 to 25/0.
- the blending ratio of each component is selected from each range so that the sum is 100% by mass.
- the radiation-sensitive composition of this embodiment tends to be excellent in performance such as sensitivity and resolution in addition to roughness when the blending ratio of each component is in the above range.
- the radiation-sensitive composition of the present embodiment may contain other resins other than the present embodiment as long as the object of the present invention is not impaired.
- Other resins include novolak resins, polyvinylphenols, polyacrylic acid, polyvinyl alcohol, styrene-maleic anhydride resins, and polymers containing acrylic acid, vinyl alcohol, or vinylphenol as monomer units, or derivatives thereof. Etc.
- the blending amount of these resins is appropriately adjusted according to the type of component (A) used, but is preferably 30 parts by mass or less, more preferably 10 parts per 100 parts by mass of component (A). It is not more than part by mass, more preferably not more than 5 parts by mass, particularly preferably 0 part by mass.
- a photoresist layer is formed on a substrate using the above-described resist composition or radiation-sensitive composition of the present embodiment, and then radiation is applied to a predetermined region of the photoresist layer. And developing.
- the method includes a step of forming a resist film on the substrate, a step of exposing the formed resist film, and a step of developing the resist film to form a resist pattern.
- the resist pattern in this embodiment can also be formed as an upper layer resist in a multilayer process.
- the method for forming the resist pattern is not particularly limited, and examples thereof include the following methods.
- a resist film is formed by applying the resist composition or radiation-sensitive composition of the present embodiment on a conventionally known substrate by a coating means such as spin coating, cast coating, or roll coating.
- the conventionally known substrate is not particularly limited, and examples thereof include a substrate for electronic components and a substrate on which a predetermined wiring pattern is formed. More specifically, a silicon substrate, a metal substrate such as copper, chromium, iron, and aluminum, a glass substrate, and the like can be given. Examples of the wiring pattern material include copper, aluminum, nickel, and gold. Further, if necessary, an inorganic and / or organic film may be provided on the substrate.
- inorganic BARC inorganic antireflection film
- organic BARC organic antireflection film
- Surface treatment with hexamethylene disilazane or the like may be performed on the substrate.
- the substrate coated with the resist composition or radiation-sensitive composition is heated.
- the heating conditions vary depending on the composition of the resist composition or radiation-sensitive composition, but are preferably 20 to 250 ° C, more preferably 20 to 150 ° C. Heating is preferred because the adhesion of the resist to the substrate tends to be improved.
- the resist film is exposed to a desired pattern with any radiation selected from the group consisting of visible light, ultraviolet light, excimer laser, electron beam, extreme ultraviolet light (EUV), X-ray, and ion beam.
- the exposure conditions and the like are appropriately selected according to the composition of the resist composition or the radiation sensitive composition.
- heating is preferably performed after radiation irradiation.
- the heating conditions vary depending on the composition of the resist composition or the radiation-sensitive composition, but are preferably 20 to 250 ° C, more preferably 20 to 150 ° C.
- a predetermined resist pattern is formed by developing the exposed resist film with a developer.
- a solubility parameter SP is used for the compound obtained by using the compound represented by the formula (1) or (2) or the compound represented by the formula (1) or (2) as a monomer. It is preferable to select a solvent having a close value), and polar solvents such as ketone solvents, ester solvents, alcohol solvents, amide solvents, ether solvents, etc., hydrocarbon solvents or alkaline aqueous solutions can be used.
- ketone solvent examples include 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, acetone, 4-heptanone, 1-hexanone, 2-hexanone, diisobutyl ketone, cyclohexanone, methylcyclohexanone, phenylacetone, methyl ethyl ketone.
- ester solvents include methyl acetate, butyl acetate, ethyl acetate, isopropyl acetate, amyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, ethyl-3 -Ethoxypropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, methyl formate, ethyl formate, butyl formate, propyl formate, ethyl lactate, butyl lactate, propyl lactate and the like.
- the alcohol solvent examples include methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol (2-propanol), n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, n-hexyl alcohol, Alcohols such as 4-methyl-2-pentanol, n-heptyl alcohol, n-octyl alcohol, n-decanol, glycol solvents such as ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol monomethyl ether, propylene glycol monomethyl Ether, ethylene glycol monoethyl ether, propylene glycol monoethyl ether, diethylene glycol monomethyl ether, triethylene Glycol monoethyl ether, glycol monoethyl ether and methoxymethyl butanol.
- Alcohols such as 4-methyl-2-pentanol, n-heptyl alcohol, n-oc
- ether solvent examples include dioxane, tetrahydrofuran and the like in addition to the glycol ether solvent.
- amide solvents include N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, hexamethylphosphoric triamide, 1,3-dimethyl-2-imidazolidinone and the like. Can be mentioned.
- hydrocarbon solvent examples include aromatic hydrocarbon solvents such as toluene and xylene, and aliphatic hydrocarbon solvents such as pentane, hexane, octane and decane.
- the water content of the developer as a whole is preferably less than 70% by mass, more preferably less than 50% by mass, and less than 30% by mass. More preferably, it is more preferably less than 10% by mass, and even more preferably substantially free of moisture. That is, the content of the organic solvent with respect to the developer is preferably 30% by mass or more and 100% by mass or less, more preferably 50% by mass or more and 100% by mass or less, based on the total amount of the developer. It is more preferable that the content is not less than 100% by mass and not more than 100% by mass, still more preferably not less than 90% by mass and not more than 100% by mass, and still more preferably not less than 95% by mass and not more than 100% by mass.
- alkaline aqueous solution examples include alkaline compounds such as mono-, di- or trialkylamines, mono-, di- or trialkanolamines, heterocyclic amines, tetramethylammonium hydroxide (TMAH), and choline. Can be mentioned.
- alkaline compounds such as mono-, di- or trialkylamines, mono-, di- or trialkanolamines, heterocyclic amines, tetramethylammonium hydroxide (TMAH), and choline. Can be mentioned.
- a developing solution containing at least one solvent selected from a ketone solvent, an ester solvent, an alcohol solvent, an amide solvent, and an ether solvent is used. It is preferable for improving the resist performance.
- the vapor pressure of the developer is preferably 5 kPa or less, more preferably 3 kPa or less, and particularly preferably 2 kPa or less at 20 ° C.
- the vapor pressure of the developing solution is 5 kPa or less, evaporation of the developing solution on the substrate or in the developing cup is suppressed, temperature uniformity within the wafer surface is improved, and as a result, dimensional uniformity within the wafer surface is achieved. It tends to improve.
- Examples of specific developers having a vapor pressure of 5 kPa or less at 20 ° C. include 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, 4-heptanone, 2-hexanone, diisobutylketone, cyclohexanone, methyl Ketone solvents such as cyclohexanone, phenylacetone, methyl isobutyl ketone; butyl acetate, amyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, ethyl-3-ethoxypro Pionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, butyl formate, propyl formate, ethyl lactate, butyl lactate, milk Ester solvent
- Glycol ether solvents such as tetrahydrofuran; amide solvents of N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide; aromatic hydrocarbon solvents such as toluene and xylene; Aliphatic hydrocarbon solvents such as octane and decane are listed.
- Specific examples of the developer having a vapor pressure of 2 kPa or less at 20 ° C., which is a particularly preferable range, include 1-octanone, 2-octanone, 1-nonanone, 2-nonanone, 4-heptanone, 2-hexanone, diisobutyl.
- Ketone solvents such as ketone, cyclohexanone, methylcyclohexanone, phenylacetone; butyl acetate, amyl acetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, ethyl-3-ethoxy Ester solvents such as propionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, ethyl lactate, butyl lactate, propyl lactate Alcohol solvents such as n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, n-hexyl alcohol, 4-methyl-2-pentanol, n-heptyl alcohol, n-octyl alcohol and n-decanol Glycol solvents
- the surfactant is not particularly limited, and for example, ionic or nonionic fluorine-based and / or silicon-based surfactants can be used.
- fluorine and / or silicon surfactants include, for example, JP-A-62-36663, JP-A-61-226746, JP-A-61-226745, JP-A-62-170950.
- it is a nonionic surfactant.
- it is more preferable to use a fluorochemical surfactant or a silicon-type surfactant.
- the amount of the surfactant used is usually 0.001 to 5% by mass, preferably 0.005 to 2% by mass, and more preferably 0.01 to 0.5% by mass with respect to the total amount of the developer.
- a development method for example, a method in which a substrate is immersed in a tank filled with a developer for a certain period of time (dip method), a method in which the developer is raised on the surface of the substrate by surface tension and is left stationary for a certain time (paddle) Method), a method of spraying the developer on the substrate surface (spray method), a method of continuously applying the developer while scanning the developer application nozzle at a constant speed on a substrate rotating at a constant speed (dynamic dispensing method) ) Etc.
- the time for developing the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- a step of stopping development may be performed while substituting with another solvent.
- the rinsing liquid used in the rinsing step after development is not particularly limited as long as the resist pattern cured by crosslinking is not dissolved, and a solution or water containing a general organic solvent can be used.
- a rinsing liquid containing at least one organic solvent selected from hydrocarbon solvents, ketone solvents, ester solvents, alcohol solvents, amide solvents and ether solvents.
- a cleaning step is performed using a rinse solution containing at least one organic solvent selected from the group consisting of ketone solvents, ester solvents, alcohol solvents, and amide solvents.
- a washing step is performed using a rinse solution containing an alcohol solvent or an ester solvent. Even more preferably, after the development, a step of washing with a rinsing solution containing a monohydric alcohol is performed. Particularly preferably, after the development, a washing step is performed using a rinsing liquid containing a monohydric alcohol having 5 or more carbon atoms.
- the time for rinsing the pattern is not particularly limited, but is preferably 10 seconds to 90 seconds.
- examples of the monohydric alcohol used in the rinsing step after development include linear, branched, and cyclic monohydric alcohols, and specifically, 1-butanol, 2-butanol, 3-methyl- 1-butanol, tert-butyl alcohol, 1-pentanol, 2-pentanol, 1-hexanol, 4-methyl-2-pentanol, 1-heptanol, 1-octanol, 2-hexanol, cyclopentanol, 2- Heptanol, 2-octanol, 3-hexanol, 3-heptanol, 3-octanol, 4-octanol and the like can be used.
- Particularly preferable monohydric alcohols having 5 or more carbon atoms include 1-hexanol, 2-hexanol, 4 -Methyl-2-pentanol, 1-pentanol, 3-methyl-1-butanol, etc. It is.
- a plurality of the above components may be mixed, or may be used by mixing with an organic solvent other than the above.
- the water content in the rinsing liquid is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 3% by mass or less. By setting the water content to 10% by mass or less, better development characteristics tend to be obtained.
- the vapor pressure of the rinsing liquid used after development is preferably 0.05 kPa or more and 5 kPa or less at 20 ° C., more preferably 0.1 kPa or more and 5 kPa or less, and 0.12 kPa or more and 3 kPa or less. Is more preferable.
- An appropriate amount of a surfactant can be added to the rinse solution.
- the developed wafer is cleaned using a rinsing solution containing the organic solvent.
- the method of the cleaning treatment is not particularly limited. For example, a method of continuously applying the rinse liquid onto the substrate rotating at a constant speed (rotary coating method), or immersing the substrate in a tank filled with the rinse liquid for a certain period of time. A method (dip method), a method of spraying a rinsing liquid on the substrate surface (spray method), etc. can be applied. Among these methods, cleaning is performed by a spin coating method, and the substrate is rotated at a rotational speed of 2000 to 4000 rpm after cleaning. It is preferable to remove the rinse liquid from the substrate.
- the pattern wiring board is obtained by etching.
- the etching can be performed by a known method such as dry etching using plasma gas and wet etching using an alkali solution, a cupric chloride solution, a ferric chloride solution, or the like.
- Plating can be performed after forming the resist pattern.
- Examples of the plating method include copper plating, solder plating, nickel plating, and gold plating.
- the residual resist pattern after etching can be stripped with an organic solvent.
- organic solvent include PGMEA (propylene glycol monomethyl ether acetate), PGME (propylene glycol monomethyl ether), EL (ethyl lactate) and the like.
- peeling method include a dipping method and a spray method.
- the wiring board on which the resist pattern is formed may be a multilayer wiring board or may have a small diameter through hole.
- the wiring substrate obtained in this embodiment can also be formed by a method of depositing a metal in a vacuum after forming a resist pattern and then dissolving the resist pattern with a solution, that is, a lift-off method.
- a film forming composition for lithography for use in an underlayer film of the present embodiment (hereinafter also referred to as “underlayer film forming material”) is a compound represented by the above formula (1), and a compound represented by the above formula (1) as a monomer. And at least one substance selected from the group consisting of a resin obtained using the compound represented by formula (2) and the compound represented by formula (2) as a monomer.
- the substance is preferably 1 to 100% by mass, more preferably 10 to 100% by mass, and more preferably 50 to 100% by mass in the lower layer film-forming material from the viewpoints of coatability and quality stability. % Is more preferable, and 100% by mass is particularly preferable.
- the underlayer film forming material of this embodiment can be applied to a wet process and has excellent heat resistance and etching resistance. Furthermore, since the lower layer film forming material of the present embodiment uses the above-mentioned substances, it is possible to form a lower layer film that suppresses deterioration of the film during high-temperature baking and has excellent etching resistance against oxygen plasma etching and the like. Furthermore, since the lower layer film forming material of this embodiment is also excellent in adhesion to the resist layer, an excellent resist pattern can be obtained. In addition, the lower layer film forming material of the present embodiment may include a known lower layer film forming material for lithography and the like as long as the effects of the present invention are not impaired.
- the lower layer film forming material of the present embodiment may contain a solvent.
- a solvent used for the lower layer film forming material of the present embodiment a known one can be appropriately used as long as it can dissolve at least the above-described substances.
- the solvent include, but are not limited to, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; cellosolv solvents such as propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate; ethyl lactate and methyl acetate Ester solvents such as ethyl acetate, butyl acetate, isoamyl acetate, ethyl lactate, methyl methoxypropionate, methyl hydroxyisobutyrate; alcohol solvents such as methanol, ethanol, isopropanol, 1-ethoxy-2-propanol; toluene, xylene And aromatic hydrocarbons such as anisole. These solvents can be used alone or in combination of two or more.
- ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and
- cyclohexanone propylene glycol monomethyl ether
- propylene glycol monomethyl ether acetate propylene glycol monomethyl ether acetate
- ethyl lactate propylene glycol monomethyl ether acetate
- ethyl lactate propylene glycol monomethyl ether acetate
- ethyl lactate propylene glycol monomethyl ether acetate
- ethyl lactate propylene glycol monomethyl ether acetate
- ethyl lactate methyl hydroxyisobutyrate
- anisole anisole
- the content of the solvent is not particularly limited, but from the viewpoint of solubility and film formation, it is preferably 100 to 10000 parts by mass, preferably 200 to 5000 parts by mass with respect to 100 parts by mass of the lower layer film-forming material. More preferred is 200 to 1000 parts by mass.
- the lower layer film-forming material of the present embodiment may contain a crosslinking agent as necessary from the viewpoint of suppressing intermixing.
- a crosslinking agent which can be used in this embodiment is not specifically limited, For example, the thing of international publication 2013/024779 can be used.
- phenol compound known compounds can be used.
- phenols include phenols, alkylphenols such as cresols and xylenols, polyhydric phenols such as hydroquinone, polycyclic phenols such as naphthols and naphthalenediols, and bisphenols such as bisphenol A and bisphenol F.
- polyfunctional phenol compounds such as phenol novolac and phenol aralkyl resin.
- aralkyl type phenol resins are preferable from the viewpoint of heat resistance and solubility.
- epoxy compound known compounds can be used and selected from those having two or more epoxy groups in one molecule.
- D Xylide epoxidation of co-condensation resin of dicyclopentadiene and phenol, epoxidation of phenol aralkyl resin synthesized from phenol and paraxylylene dichloride, biphenyl synthesized from phenol and bischloromethylbiphenyl, etc.
- examples thereof include epoxidized products of aralkyl type phenol resins, and epoxidized products of naphthol aralkyl resins synthesized from naphthols and paraxylylene dichloride.
- These epoxy resins may be used independently and may use 2 or more types together. Among these, from the viewpoint of heat resistance and solubility, a solid epoxy resin at room temperature such as an epoxy resin obtained from phenol aralkyl resins and biphenyl aralkyl resins is preferable.
- the cyanate compound is not particularly limited as long as it is a compound having two or more cyanate groups in one molecule, and a known one can be used.
- a preferred cyanate compound one having a structure in which a hydroxyl group of a compound having two or more hydroxyl groups in one molecule is substituted with a cyanate group can be mentioned.
- the cyanate compound preferably has an aromatic group, and a cyanate compound having a structure in which the cyanate group is directly connected to the aromatic group can be suitably used.
- cyanate compounds include bisphenol A, bisphenol F, bisphenol M, bisphenol P, bisphenol E, phenol novolac resin, cresol novolac resin, dicyclopentadiene novolac resin, tetramethylbisphenol F, bisphenol A novolac resin, bromine.
- Bisphenol A brominated phenol novolak resin, trifunctional phenol, tetrafunctional phenol, naphthalene type phenol, biphenyl type phenol, phenol aralkyl resin, biphenyl aralkyl resin, naphthol aralkyl resin, dicyclopentadiene aralkyl resin, alicyclic phenol, phosphorus
- cyanate compounds may be used alone or in combination of two or more.
- the cyanate compound described above may be in any form of a monomer, an oligomer, and a resin.
- amino compound examples include m-phenylenediamine, p-phenylenediamine, 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylpropane, 4,4′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, 3 , 3'-diaminodiphenyl ether, 4,4'-diaminodiphenyl sulfone, 3,4'-diaminodiphenyl sulfone, 3,3'-diaminodiphenyl sulfone, 4,4'-diaminodiphenyl sulfide, 3,4'-diaminodiphenyl Sulfide, 3,3′-diaminodiphenyl sulfide, 1,4-bis (4-aminophenoxy) benzene, 1,3-bis (4-aminophenoxy) benzene
- Alicyclic amines such as heptane, 3 (4), 8 (9) -bis (aminomethyl) tricyclo [5.2.1.02,6] decane, 1,3-bisaminomethylcyclohexane, isophoronediamine , Ethylenediamine, hexamethylenediamine, Kuta diamine, decamethylene diamine, diethylene triamine, aliphatic amines such as triethylenetetramine, and the like.
- benzoxazine compound examples include Pd-type benzoxazine obtained from bifunctional diamines and monofunctional phenols, and Fa-type benzoxazine obtained from monofunctional diamines and bifunctional phenols. It is done.
- the melamine compound examples include hexamethylol melamine, hexamethoxymethyl melamine, a compound in which 1 to 6 methylol groups of hexamethylol melamine are methoxymethylated or a mixture thereof, hexamethoxyethyl melamine, hexaacyloxymethyl.
- examples thereof include compounds in which 1 to 6 methylol groups of melamine and hexamethylolmelamine are acyloxymethylated, or a mixture thereof.
- the guanamine compound include, for example, tetramethylolguanamine, tetramethoxymethylguanamine, a compound in which 1 to 4 methylol groups of tetramethylolguanamine are methoxymethylated, or a mixture thereof, tetramethoxyethylguanamine, tetraacyloxyguanamine And compounds in which 1 to 4 methylol groups of tetramethylolguanamine are acyloxymethylated, or a mixture thereof.
- glycoluril compound examples include, for example, tetramethylol glycoluril, tetramethoxyglycoluril, tetramethoxymethylglycoluril, a compound in which 1 to 4 methylol groups of tetramethylolglycoluril are methoxymethylated, or a mixture thereof, Examples thereof include compounds in which 1 to 4 methylol groups of tetramethylol glycoluril are acyloxymethylated, or mixtures thereof.
- urea compound examples include tetramethylol urea, tetramethoxymethyl urea, a compound in which 1 to 4 methylol groups of tetramethylol urea are methoxymethylated or a mixture thereof, tetramethoxyethyl urea, and the like.
- a crosslinking agent having at least one allyl group may be used from the viewpoint of improving the crosslinkability.
- Specific examples of the crosslinking agent having at least one allyl group include 2,2-bis (3-allyl-4-hydroxyphenyl) propane, 1,1,1,3,3,3-hexafluoro-2,2 -Bis (3-allyl-4-hydroxyphenyl) propane, bis (3-allyl-4-hydroxyphenyl) sulfone, bis (3-allyl-4-hydroxyphenyl) sulfide, bis (3-allyl-4-hydroxyphenyl) ) Allylphenols such as ether, 2,2-bis (3-allyl-4-cyanatophenyl) propane, 1,1,1,3,3,3-hexafluoro-2,2-bis (3 -Allyl-4-cyanatophenyl) propane, bis (3-allyl-4-cyanatosiphenyl) sulfone, bis (3-allyl-4-cyanatophenyl) sulfide, bis (3- Examples
- the content of the crosslinking agent in the lower layer film-forming material is not particularly limited, but is preferably 0.1 to 100 parts by weight with respect to 100 parts by weight of the lower layer film-forming material, and 5 to 50 parts by weight. Is more preferably 10 to 40 parts by mass.
- Crosslinking accelerator In the lower layer film forming material of the present embodiment, a crosslinking accelerator for accelerating the crosslinking and curing reaction can be used as necessary.
- the crosslinking accelerator is not particularly limited as long as it promotes crosslinking and curing reaction, and examples thereof include amines, imidazoles, organic phosphines, and Lewis acids. These crosslinking accelerators can be used alone or in combination of two or more. Among these, imidazoles or organic phosphines are preferable, and imidazoles are more preferable from the viewpoint of lowering the crosslinking temperature.
- crosslinking accelerator examples include, but are not limited to, for example, 1,8-diazabicyclo (5,4,0) undecene-7, triethylenediamine, benzyldimethylamine, triethanolamine, dimethylaminoethanol, tris (dimethylamino).
- Tertiary amines such as methyl) phenol, 2-methylimidazole, 2-phenylimidazole, 2-ethyl-4-methylimidazole, 2-phenyl-4-methylimidazole, 2-heptadecylimidazole, 2,4,5- Imidazoles such as triphenylimidazole, organic phosphines such as tributylphosphine, methyldiphenylphosphine, triphenylphosphine, diphenylphosphine, phenylphosphine, tetraphenylphosphonium tetraphenylborate, teto Tetraphenyl such as phenylphosphonium / ethyltriphenylborate, tetrabutylphosphonium / tetrabutylborate, etc., 2-ethyl-4-methylimidazole / tetraphenylborate, N-methylmorpholine /
- the blending amount of the crosslinking accelerator is usually preferably 0.1 to 10 parts by mass when the entire lower layer film-forming material is 100 parts by mass, and more preferably easy to control and economical. From the viewpoint, it is 0.1 to 5 parts by mass, and more preferably 0.1 to 3 parts by mass.
- a radical polymerization initiator in the lower layer film forming material of the present embodiment, can be blended as necessary.
- the radical polymerization initiator may be a photopolymerization initiator that initiates radical polymerization with light or a thermal polymerization initiator that initiates radical polymerization with heat.
- Such a radical polymerization initiator is not particularly limited, and those conventionally used can be appropriately employed.
- 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile 1-[(1-cyano-1-methylethyl) azo] formamide, 1,1′-azobis (cyclohexane-1-carbonitrile), 2,2′-azobis (2-methylbutyronitrile), 2,2′-azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis ( 2-methylpropionamidine) dihydrochloride, 2,2′-azobis (2-methyl-N-phenylpropionamidine) dihydrochloride, 2,2′-azobis [N- (4-chlorophenyl) -2-methylpropionamidine] Dihydride chloride, 2,2'-azobis [N- (4-hydrophenyl) -2-methylpropionamidine] dihydrochloride 2,2′-azobis [2-methyl-N- (phenylmethyl) propionamidine] dihydrochloride, 2,2′-azo
- the content of the radical polymerization initiator may be a stoichiometrically required amount, but is preferably 0.05 to 25 parts by mass when the lower layer film forming material is 100 parts by mass. More preferably, the content is 0.1 to 10 parts by mass.
- the content of the radical polymerization initiator is 0.05 parts by mass or more, there is a tendency that curing can be prevented from being insufficient.
- the content of the radical polymerization initiator is 25 parts by mass or less. In such a case, the long-term storage stability of the lower layer film-forming material at room temperature tends to be prevented from being impaired.
- the lower layer film-forming material of the present embodiment may contain an acid generator as required from the viewpoint of further promoting the crosslinking reaction by heat.
- an acid generator those that generate an acid by thermal decomposition and those that generate an acid by light irradiation are known, and any of them can be used. For example, those described in International Publication No. 2013/024779 can be used.
- the content of the acid generator is not particularly limited, but is preferably 0.1 to 50 parts by weight, more preferably 100 parts by weight of the lower layer film forming material. 0.5 to 40 parts by mass.
- the lower layer film-forming material of the present embodiment may contain a basic compound from the viewpoint of improving storage stability.
- the basic compound serves as a quencher for the acid to prevent the acid generated in a trace amount from the acid generator from causing the crosslinking reaction to proceed.
- a basic compound is not particularly limited, and examples thereof include those described in International Publication No. 2013/024779.
- the content of the basic compound is not particularly limited, but is preferably 0.001 to 2 parts by mass, more preferably 100 parts by mass of the lower layer film forming material. 0.01 to 1 part by mass.
- the lower layer film forming material in the present embodiment may contain other resins and / or compounds for the purpose of imparting curability by heat or light and controlling the absorbance.
- other resins and / or compounds include naphthol resins, xylene resins, naphthol-modified resins, phenol-modified resins of naphthalene resins, polyhydroxystyrene, dicyclopentadiene resins, (meth) acrylates, dimethacrylates, trimethacrylates, tetra Resins containing no heteroaromatic ring such as methacrylate, vinylnaphthalene, polyacenaphthylene, etc., biphenyl rings such as phenanthrenequinone, fluorene, etc., heterocycles having heteroatoms such as thiophene, indene, etc .; rosin resins; Examples thereof include resins or compounds containing an alicyclic structure such as cycl
- the lower layer film-forming material in the present embodiment may contain a known additive.
- the known additives include, but are not limited to, for example, heat and / or photocuring catalysts, polymerization inhibitors, flame retardants, fillers, coupling agents, thermosetting resins, photocurable resins, dyes, Examples thereof include pigments, thickeners, lubricants, antifoaming agents, leveling agents, ultraviolet absorbers, surfactants, colorants, and nonionic surfactants.
- the lower layer film for lithography in this embodiment is formed from the lower layer film forming material.
- a lower layer film is formed on a substrate using the above composition, and at least one photoresist layer is formed on the lower layer film.
- a step of performing development by irradiating a predetermined region with radiation More specifically, a step (A-1) of forming a lower layer film on the substrate using the lower layer film forming material of the present embodiment, and a step of forming at least one photoresist layer on the lower layer film ( A-2) and a step (A-3) of performing development by irradiating a predetermined region of the photoresist layer with radiation after the step (A-2).
- an interlayer film is formed on a substrate using the above composition, an interlayer film is formed on the lower film using a resist interlayer film material, and the interlayer layer is formed.
- a step of forming at least one photoresist layer on the film, a step of irradiating a predetermined region of the photoresist layer with radiation and developing to form a resist pattern, and the intermediate layer film using the resist pattern as a mask Etching the lower layer film using the obtained intermediate layer film pattern as an etching mask and etching the substrate using the obtained lower layer film pattern as an etching mask to form a pattern on the substrate.
- a step (B-1) of forming a lower layer film on the substrate using the lower layer film forming material of the present embodiment, and a resist intermediate layer material containing silicon atoms on the lower layer film are used.
- a step (B-4) of irradiating a predetermined region of the photoresist layer and developing to form a resist pattern and after the step (B-4), the intermediate layer film using the resist pattern as a mask Etching the lower layer film using the obtained intermediate layer film pattern as an etching mask, and etching the substrate using the obtained lower layer film pattern as an etching mask to form a pattern on the substrate (B-5)
- the formation method of the lower layer film for lithography in the present embodiment is not particularly limited as long as it is formed from the lower layer film forming material of the present embodiment, and a known method can be applied.
- a known method such as spin coating or screen printing or a printing method
- the organic solvent is volatilized and removed, and then the known method is used.
- the lower layer film for lithography of this embodiment can be formed by crosslinking and curing. Examples of the crosslinking method include methods such as thermosetting and photocuring.
- the baking temperature is not particularly limited, but is preferably in the range of 80 to 450 ° C., more preferably 200 to 400 ° C.
- the baking time is not particularly limited, but is preferably within the range of 10 to 300 seconds.
- the thickness of the lower layer film can be appropriately selected according to the required performance, and is not particularly limited, but is usually preferably about 30 to 20000 nm, and more preferably 50 to 15000 nm.
- a silicon-containing resist layer is formed thereon, or a single-layer resist made of ordinary hydrocarbons.
- a silicon-containing intermediate layer is formed thereon, and further thereon. It is preferable to produce a single-layer resist layer that does not contain silicon. In this case, a well-known thing can be used as a photoresist material for forming this resist layer.
- a silicon-containing resist layer or a single layer resist made of ordinary hydrocarbon can be formed on the lower layer film.
- a silicon-containing intermediate layer can be formed on the lower layer film, and a single-layer resist layer not containing silicon can be formed on the silicon-containing intermediate layer.
- the photoresist material for forming the resist layer can be appropriately selected from known materials and is not particularly limited.
- a silicon-containing resist material for a two-layer process from the viewpoint of oxygen gas etching resistance, a silicon atom-containing polymer such as a polysilsesquioxane derivative or a vinylsilane derivative is used as a base polymer, and an organic solvent, an acid generator, If necessary, a positive photoresist material containing a basic compound or the like is preferably used.
- a silicon atom-containing polymer a known polymer used in this type of resist material can be used.
- a polysilsesquioxane-based intermediate layer is preferably used as the silicon-containing intermediate layer for the three-layer process.
- the intermediate layer By giving the intermediate layer an effect as an antireflection film, reflection tends to be effectively suppressed.
- the k value increases and the substrate reflection tends to increase, but the reflection is suppressed in the intermediate layer.
- the substrate reflection can be reduced to 0.5% or less.
- the intermediate layer having such an antireflection effect is not limited to the following, but for 193 nm exposure, a polysilsesquioxy crosslinked with acid or heat into which a light absorbing group having a phenyl group or a silicon-silicon bond is introduced. Sun is preferably used.
- an intermediate layer formed by a Chemical-Vapor-deposition (CVD) method can be used.
- the intermediate layer having a high effect as an antireflection film produced by the CVD method is not limited to the following, but for example, a SiON film is known.
- the formation of the intermediate layer by a wet process such as spin coating or screen printing has a simpler and more cost-effective advantage than the CVD method.
- the upper layer resist in the three-layer process may be either a positive type or a negative type, and the same one as a commonly used single layer resist can be used.
- the lower layer film in this embodiment can also be used as an antireflection film for a normal single layer resist or a base material for suppressing pattern collapse. Since the lower layer film of this embodiment is excellent in etching resistance for the base processing, it can be expected to function as a hard mask for the base processing.
- a wet process such as spin coating or screen printing is preferably used as in the case of forming the lower layer film.
- prebaking is usually performed, but this prebaking is preferably performed at 80 to 180 ° C. for 10 to 300 seconds.
- a resist pattern can be obtained by performing exposure, post-exposure baking (PEB), and development.
- the thickness of the resist film is not particularly limited, but is generally preferably 30 to 500 nm, more preferably 50 to 400 nm.
- the exposure light may be appropriately selected and used according to the photoresist material to be used.
- high energy rays having a wavelength of 300 nm or less, specifically, 248 nm, 193 nm, 157 nm excimer laser, 3 to 20 nm soft X-ray, electron beam, X-ray and the like can be mentioned.
- the resist pattern formed by the above method is one in which pattern collapse is suppressed by the lower layer film in this embodiment. Therefore, by using the lower layer film in the present embodiment, a finer pattern can be obtained, and the exposure amount necessary for obtaining the resist pattern can be reduced.
- gas etching is preferably used as the etching of the lower layer film in the two-layer process.
- gas etching etching using oxygen gas is suitable.
- an inert gas such as He or Ar, or CO, CO 2 , NH 3 , SO 2 , N 2 , NO 2 , or H 2 gas.
- gas etching can be performed only with CO, CO 2 , NH 3 , N 2 , NO 2 , and H 2 gas without using oxygen gas.
- the latter gas is preferably used for side wall protection for preventing undercut of the pattern side wall.
- gas etching is also preferably used for etching the intermediate layer in the three-layer process.
- the gas etching the same one as described in the above two-layer process can be applied.
- the processing of the intermediate layer in the three-layer process is preferably performed using a fluorocarbon gas and a resist pattern as a mask.
- the lower layer film can be processed by, for example, oxygen gas etching using the intermediate layer pattern as a mask.
- a silicon oxide film, a silicon nitride film, or a silicon oxynitride film is formed by a CVD method, an ALD method, or the like.
- the method for forming the nitride film is not limited to the following, but for example, a method described in Japanese Patent Application Laid-Open No. 2002-334869 (Patent Document 6) and WO 2004/066377 (Patent Document 7) can be used.
- a photoresist film can be formed directly on such an intermediate film, but an organic antireflection film (BARC) is formed on the intermediate film by spin coating, and a photoresist film is formed thereon. May be.
- BARC organic antireflection film
- an intermediate layer based on polysilsesquioxane is also preferably used.
- the resist intermediate layer film By providing the resist intermediate layer film with an effect as an antireflection film, reflection tends to be effectively suppressed.
- Specific materials of the polysilsesquioxane-based intermediate layer are not limited to the following, but are described, for example, in JP-A-2007-226170 (Patent Document 8) and JP-A-2007-226204 (Patent Document 9). Can be used.
- Etching of the next substrate can also be performed by a conventional method.
- the substrate is SiO 2 or SiN
- Etching mainly with gas can be performed.
- the substrate is etched with a chlorofluorocarbon gas, the silicon-containing resist of the two-layer resist process and the silicon-containing intermediate layer of the three-layer process are peeled off simultaneously with the substrate processing.
- the silicon-containing resist layer or the silicon-containing intermediate layer is separately peeled, and generally, dry etching peeling with a chlorofluorocarbon-based gas is performed after the substrate is processed. .
- the lower layer film in this embodiment is characterized by excellent etching resistance of these substrates.
- a known substrate can be appropriately selected and used, and is not particularly limited. Examples thereof include Si, ⁇ -Si, p-Si, SiO 2 , SiN, SiON, W, TiN, and Al. .
- the substrate may be a laminate having a film to be processed (substrate to be processed) on a base material (support). Examples of such processed films include various low-k films such as Si, SiO 2 , SiON, SiN, p-Si, ⁇ -Si, W, W-Si, Al, Cu, and Al-Si, and their stopper films. In general, a material different from the base material (support) is used.
- the thickness of the substrate or film to be processed is not particularly limited, but it is usually preferably about 50 to 10,000 nm, and more preferably 75 to 5000 nm.
- the resist permanent film formed by applying the composition in the present embodiment is suitable as a permanent film remaining in the final product after forming a resist pattern as necessary.
- the permanent film include a solder resist, a package material, an underfill material, a package adhesive layer such as a circuit element, an adhesive layer between an integrated circuit element and a circuit board, and a thin film display protective film for a thin display. Examples include a liquid crystal color filter protective film, a black matrix, and a spacer.
- the permanent film made of the composition according to the present embodiment has excellent heat resistance and moisture resistance, and also has a very excellent advantage of less contamination due to sublimation components.
- a display material is a material having high sensitivity, high heat resistance, and moisture absorption reliability with little deterioration in image quality due to important contamination.
- composition in this embodiment is used for resist permanent film applications, in addition to the curing agent, if necessary, various additions such as other resins, surfactants and dyes, fillers, crosslinking agents, dissolution accelerators, etc.
- a composition for a resist permanent film can be obtained by adding an agent and dissolving in an organic solvent.
- the film forming composition for lithography and the composition for resist permanent film in the present embodiment can be prepared by blending the above components and mixing them using a stirrer or the like. Further, when the resist underlayer film composition or resist permanent film composition in the present embodiment contains a filler or a pigment, it is dispersed or mixed using a dispersing device such as a dissolver, a homogenizer, or a three roll mill. Can be prepared.
- a dispersing device such as a dissolver, a homogenizer, or a three roll mill.
- Carbon concentration and oxygen concentration Carbon concentration and oxygen concentration (mass%) were measured by organic elemental analysis using the following apparatus. Apparatus: CHN coder MT-6 (manufactured by Yanaco Analytical Co., Ltd.)
- the molecular weight of the compound was measured by LC-MS analysis using Acquity UPLC / MALDI-Synapt HDMS manufactured by Water. Moreover, the gel permeation chromatography (GPC) analysis was performed on the following conditions, and the polystyrene conversion weight average molecular weight (Mw), number average molecular weight (Mn), and dispersity (Mw / Mn) were calculated
- Apparatus Shodex GPC-101 (manufactured by Showa Denko KK) Column: KF-80M x 3 Eluent: THF 1mL / min Temperature: 40 ° C
- reaction solution was concentrated and 50 g of heptane was added to precipitate the reaction product. After cooling to room temperature, the solution was filtered and separated. The solid obtained by filtration was dried and then subjected to separation and purification by column chromatography to obtain 5.8 g of the target compound represented by the following formula (BisF-1). The following peaks were found by 400 MHz- 1 H-NMR, and confirmed to have a chemical structure of the following formula (BisF-1).
- the molecular weight of the obtained compound by the above method As a result of measuring the molecular weight of the obtained compound by the above method, it was 776.
- the thermal decomposition temperature was 390 ° C.
- the glass transition point was 72 ° C.
- the melting point was 224 ° C., confirming that it had high heat resistance.
- the thermal decomposition temperature was 372 ° C.
- the glass transition point was 70 ° C.
- the melting point was 210 ° C., confirming that it had high heat resistance.
- the obtained resin (R1-XBisN-1) had Mn: 1975, Mw: 3650, and Mw / Mn: 1.84.
- the obtained resin (R2-XBisN-1) had Mn: 1610, Mw: 2567, and Mw / Mn: 1.59.
- the obtained resin (E-R1-XBisN-1) was Mn: 2176, Mw: 3540, and Mw / Mn: 1.62.
- the obtained resin (UaR1-XBisN-1) had Mn: 2130, Mw: 3590, and Mw / Mn: 1.55.
- the obtained resin (UaE-R1-XBisN-1) had Mn: 2371, Mw: 4240, and Mw / Mn: 1.79.
- the obtained resin (E-R2-XBisN-1) was Mn: 2516, Mw: 3960, and Mw / Mn: 1.62.
- Synthesis Example 24-1 Synthesis of UaR2-XBisN-1 In place of the above formula (R1-XBisN-1) obtained in Synthesis Example 23, the above formula (R2-XBisN-1) obtained in Synthesis Example 24 was used. The reaction was carried out in the same manner as in Synthesis Example 23-1 except that 33.2 g of the compound represented by the formula (1) was used to obtain 40.1 g of a resin represented by (UaR2-XBisN-1) as a brown solid.
- the obtained resin (UaR2-XBisN-1) had Mn: 2446, Mw: 4510, and Mw / Mn: 1.84.
- the obtained resin (UaE-R2-XBisN-1) had Mn: 2679, Mw: 4830, and Mw / Mn: 1.80.
- ethylbenzene (special grade reagent manufactured by Wako Pure Chemical Industries, Ltd.) as a diluent solvent was added to the reaction solution, and after standing, the lower aqueous phase was removed. Further, neutralization and washing with water were performed, and ethylbenzene and unreacted 1,5-dimethylnaphthalene were distilled off under reduced pressure to obtain 1.25 kg of a light brown solid dimethylnaphthalene formaldehyde resin. The molecular weight of the obtained dimethylnaphthalene formaldehyde was Mn: 562.
- a four-necked flask with an internal volume of 0.5 L equipped with a Dimroth condenser, a thermometer, and a stirring blade was prepared.
- This four-necked flask was charged with 100 g (0.51 mol) of the dimethylnaphthalene formaldehyde resin obtained as described above and 0.05 g of paratoluenesulfonic acid under a nitrogen stream, and the temperature was raised to 190 ° C. Stir after heating for hours. Thereafter, 52.0 g (0.36 mol) of 1-naphthol was further added, and the temperature was further raised to 220 ° C. to react for 2 hours.
- the obtained resin (CR-1) was Mn: 885, Mw: 2220, and Mw / Mn: 4.17.
- Examples 1-1 to 24-2, Comparative Example 1 A solubility test was conducted using the compounds or resins described in Synthesis Examples 1-1 to 24-2 and CR-1 described in Synthesis Comparative Example 1. The results are shown in Table 8. Moreover, the lower layer film forming material for lithography of the composition shown in Table 8 was prepared, respectively. Next, these lower-layer film forming materials for lithography were spin-coated on a silicon substrate, and then baked at 240 ° C. for 60 seconds and further at 400 ° C. for 120 seconds to prepare 200 nm-thick underlayer films. The following were used about the acid generator, the crosslinking agent, and the organic solvent.
- Acid generator Ditertiary butyl diphenyliodonium nonafluoromethanesulfonate (DTDDPI) manufactured by Midori Chemical Co., Ltd.
- Cross-linking agent Nikalac MX270 (Nikalac) manufactured by Sanwa Chemical Co., Ltd.
- Organic solvent Propylene glycol monomethyl ether acetate acetate (PGMEA)
- Radical polymerization initiator IRGACURE184 manufactured by BASF Cross-linking agent: (1) Sanka Chemical Co., Ltd. Nicarak MX270 (Nicarak) (2) Diallyl bisphenol A cyanate (DABPA-CN) manufactured by Mitsubishi Gas Chemical (3) Diallyl bisphenol A (BPA-CA) manufactured by Konishi Chemical Industries (4) Benzoxazine (BF-BXZ) manufactured by Konishi Chemical Industries (5) Nippon Kayaku Biphenyl Aralkyl Epoxy Resin (NC-3000-L) Organic solvent: Propylene glycol monomethyl ether acetate acetate (PGMEA)
- the structure of the crosslinking agent is shown by the following formula.
- n is an integer of 1 to 4.
- Etching device RIE-10NR manufactured by Samco International Output: 50W Pressure: 20Pa Time: 2min Etching gas
- Ar gas flow rate: CF 4 gas flow rate: O 2 gas flow rate 50: 5: 5 (sccm)
- Etching resistance was evaluated according to the following procedure. First, a novolac underlayer film was prepared under the same conditions as in Example 1-1 except that novolak (PSM4357 manufactured by Gunei Chemical Co., Ltd.) was used instead of the compound (UaXBisN-1) used in Example 1-1. did. Then, the above-described etching test was performed on this novolac lower layer film, and the etching rate at that time was measured. Next, the above-described etching test was similarly performed on the lower layer films of Example 1-1 and Comparative Example 1, and the etching rate at that time was measured. Then, the etching resistance was evaluated according to the following evaluation criteria based on the etching rate of the novolak underlayer film.
- novolak PSM4357 manufactured by Gunei Chemical Co., Ltd.
- each solution of an underlayer film forming material for lithography containing UaXBisN-1, UaE-XBisN-1, UaBisF-1, or UaE-BisF-1 is applied onto a 300 nm-thick SiO 2 substrate, and 240 ° C. was baked for 60 seconds at 400 ° C. for 120 seconds to form a lower layer film having a thickness of 70 nm.
- an ArF resist solution was applied and baked at 130 ° C. for 60 seconds to form a 140 nm-thick photoresist layer.
- the compound of the formula (11) is 4.15 g of 2-methyl-2-methacryloyloxyadamantane, 3.00 g of methacryloyloxy- ⁇ -butyrolactone, 2.08 g of 3-hydroxy-1-adamantyl methacrylate, azobisisobutyronitrile. 0.38 g was dissolved in 80 mL of tetrahydrofuran to obtain a reaction solution. This reaction solution was polymerized for 22 hours under a nitrogen atmosphere while maintaining the reaction temperature at 63 ° C., and then the reaction solution was dropped into 400 mL of n-hexane. The product resin thus obtained was coagulated and purified, and the resulting white powder was filtered and obtained by drying overnight at 40 ° C. under reduced pressure.
- the photoresist layer was exposed using an electron beam drawing apparatus (ELIONX, ELS-7500, 50 keV), baked at 115 ° C. for 90 seconds (PEB), and 2.38 mass% tetramethylammonium hydroxide (A positive resist pattern was obtained by developing with an aqueous solution of TMAH for 60 seconds.
- ELIONX electron beam drawing apparatus
- ELS-7500 ELS-7500, 50 keV
- PEB baked at 115 ° C. for 90 seconds
- TMAH 2.38 mass% tetramethylammonium hydroxide
- the shapes and defects of the obtained 55 nm L / S (1: 1) and 80 nm L / S (1: 1) resist patterns were observed using an electron microscope (S-4800) manufactured by Hitachi, Ltd.
- S-4800 electron microscope
- the resist pattern was evaluated as “good” when the pattern was not collapsed and the rectangularity was good, and “bad”.
- the minimum line width with no pattern collapse and good rectangularity was used as an evaluation index as “resolution”.
- the minimum electron beam energy amount capable of drawing a good pattern shape was set as “sensitivity” and used as an evaluation index. The results are shown in Table 10.
- Examples 49 to 52> The solution of the material for forming a lower layer film for lithography obtained in Examples 1-1 to 2-2 is applied on a SiO 2 substrate having a film thickness of 300 nm and baked at 240 ° C. for 60 seconds and further at 400 ° C. for 120 seconds. Thus, a lower layer film having a thickness of 80 nm was formed. On this lower layer film, a silicon-containing intermediate layer material was applied and baked at 200 ° C. for 60 seconds to form an intermediate layer film having a thickness of 35 nm. Further, the ArF resist solution was applied on the intermediate layer film and baked at 130 ° C. for 60 seconds to form a 150 nm-thick photoresist layer. As the silicon-containing intermediate layer material, a silicon atom-containing polymer described in JP-A-2007-226170 ⁇ Synthesis Example 1> was used.
- the photoresist layer was subjected to mask exposure using an electron beam lithography apparatus (ELIONX, ELS-7500, 50 keV), baked at 115 ° C. for 90 seconds (PEB), and 2.38 mass% tetramethylammonium hydroxide.
- ELIONX electron beam lithography apparatus
- PEB baked at 115 ° C. for 90 seconds
- TMAH tetramethylammonium hydroxide
- Etching condition output to resist intermediate layer film of resist pattern 50W Pressure: 20Pa Time: 1 min Etching gas
- Ar gas flow rate: CF 4 gas flow rate: O 2 gas flow rate 50: 8: 2 (sccm)
- Etching condition output to SiO 2 film of resist underlayer film pattern 50W Pressure: 20Pa Time: 2min Etching gas
- Ar gas flow rate: C 5 F 12 gas flow rate: C 2 F 6 gas flow rate: O 2 gas flow rate 50: 4: 3: 1 (sccm)
- an optical component-forming composition was prepared with the formulation shown in Table 11 below.
- the following were used for the acid generator, the crosslinking agent, the acid diffusion inhibitor, and the solvent.
- Acid generator Ditertiary butyl diphenyliodonium nonafluoromethanesulfonate (DTDDPI) manufactured by Midori Chemical Co., Ltd.
- Cross-linking agent Nikalac MX270 (Nikalac) manufactured by Sanwa Chemical Co., Ltd.
- Organic solvent Propylene glycol monomethyl ether acetate acetate (PGMEA)
- optical component-forming composition in a uniform state was spin-coated on a clean silicon wafer and then pre-baked (PB) in an oven at 110 ° C. to form an optical component-forming film having a thickness of 1 ⁇ m.
- PB pre-baked
- the prepared optical component-forming composition was evaluated as “A” when the film formation was good and “C” when the formed film had defects.
- a resist composition was prepared with the formulation shown in Table 12 below. Of the components of the resist composition in Table 12, the following were used for the radical generator, radical diffusion inhibitor, and solvent.
- Radical generator IRGACURE184 manufactured by BASF Radical diffusion control agent: IRGACURE1010 manufactured by BASF Organic solvent: Propylene glycol monomethyl ether acetate acetate (PGMEA)
- the line and space was observed with a scanning electron microscope (S-4800, manufactured by Hitachi High-Technology Corporation), and the reactivity of the resist composition by electron beam irradiation was evaluated.
- Sensitivity was expressed as the minimum amount of energy per unit area necessary for obtaining a pattern, and was evaluated according to the following.
- the obtained pattern shape is transferred to an SEM (Scanning Electron Microscope). And evaluated according to the following.
- C When a non-rectangular pattern is obtained
- the compound and resin of the present embodiment are highly soluble in a safe solvent, have good heat resistance and etching resistance, and the resist composition of the present embodiment gives a good resist pattern shape.
- a wet process can be applied, and a compound, a resin, and a film forming composition for lithography useful for forming a photoresist underlayer film having excellent heat resistance and etching resistance can be realized.
- this film-forming composition for lithography uses a compound or resin having a specific structure that has high heat resistance and high solvent solubility, deterioration of the film during high-temperature baking is suppressed, oxygen plasma etching, etc. It is possible to form a resist and an underlayer film that are also excellent in etching resistance to. Furthermore, when the lower layer film is formed, the adhesion with the resist layer is also excellent, so that an excellent resist pattern can be formed.
- the refractive index is high and the coloring is suppressed by low-temperature to high-temperature treatment, it is useful as a composition for forming various optical parts.
- the present invention provides, for example, an electrical insulating material, a resist resin, a semiconductor sealing resin, an adhesive for a printed wiring board, an electrical laminate mounted on an electrical device / electronic device / industrial device, etc. ⁇
- resist resin for semiconductors resin for forming lower layer film, film and sheet, plastic lens (prism lens, lenticular lens, micro lens, Fresnel lens, viewing angle control lens, contrast enhancement lens, etc.) , Retardation film, electromagnetic shielding film, prism, optical fiber, flexible
- the present invention can be used particularly effectively in the fields of lithography resists, lithography lower layers, multilayer resist lower layers, and optical components.
- the present invention has industrial applicability in the fields of lithography resist, lithography underlayer film, multilayer resist underlayer film and optical components.
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Abstract
Description
そこで、これまでに、より解像性の高いレジストパターンを与えるために、種々の低分子量レジスト材料が提案されている。低分子量レジスト材料は分子サイズが小さいことから、解像性が高く、ラフネスが小さいレジストパターンを与えることが期待される。
[1]
下記式(0)で表される、化合物。
(式(0)中、RYは、水素原子、炭素数1~30のアルキル基又は炭素数6~30のアリール基であり、
RZは、炭素数1~60のN価の基又は単結合であり、
RTは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が下記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、RTの少なくとも1つは下記式(0-1)で表される基を含み、
Xは、酸素原子、硫黄原子又は無架橋であることを示し、
mは、各々独立して0~9の整数であり、ここで、mの少なくとも1つは1~9の整数であり、
Nは、1~4の整数であり、Nが2以上の整数の場合、N個の[ ]内の構造式は同一であっても異なっていてもよく、
rは、各々独立して0~2の整数である。)
(式(0-1)中、RXは、水素原子又はメチル基である。)
[2]
前記式(0)で表される化合物が下記式(1)で表される化合物である、[1]に記載の化合物。
(式(1)中、R0は、前記RYと同義であり、
R1は、炭素数1~60のn価の基又は単結合であり、
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは前記式(0-1)で表される基を含み、
m2及びm3は、各々独立して、0~8の整数であり、
m4及びm5は、各々独立して、0~9の整数であり、
但し、m2、m3、m4及びm5は同時に0になることはなく、
nは前記Nと同義であり、ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよく、
p2~p5は、前記rと同義である。)
[3]
前記式(0)で表される化合物が下記式(2)で表される化合物である、[1]に記載の化合物。
(式(2)中、R0Aは、前記RYと同義であり、
R1Aは、炭素数1~60のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは前記式(0-1)で表される基を含み、
nAは、前記Nと同義であり、ここで、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよく、
XAは、酸素原子、硫黄原子又は無架橋であることを示し、
m2Aは、各々独立して、0~7の整数であり、但し、少なくとも1つのm2Aは1~7の整数であり、
qAは、各々独立して、0又は1である。)
[4]
前記式(1)で表される化合物が下記式(1-1)で表される化合物である、[2]に記載の化合物。
(式(1-1)中、R0、R1、R4、R5、n、p2~p5、m4及びm5は、前記式(1)におけるものと同義であり、
R6~R7は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、
R10~R11は、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R10~R11の少なくとも1つは下記式(0-2)で表される基であり、
m6及びm7は、各々独立して、0~7の整数であり、
但し、m4、m5、m6及びm7は同時に0になることはない。)
(式(0-2)中、RXは、前記式(0-1)におけるものと同義であり、sは、0~30の整数である。)
[5]
前記式(1-1)で表される化合物が下記式(1-2)で表される化合物である、[4]に記載の化合物。
(式(1-2)中、R0、R1、R6、R7、R10、R11、n、p2~p5、m6及びm7は、前記式(1-1)におけるものと同義であり、
R8~R9は、前記R6~R7と同義であり、
R12~R13は、前記R10~R11と同義であり、
m8及びm9は、各々独立して、0~8の整数であり、
但し、m6、m7、m8及びm9は同時に0になることはない。)
[6]
前記式(2)で表される化合物が下記式(2-1)で表される化合物である、[3]に記載の化合物。
(式(2-1)中、R0A、R1A、nA、qA及びXA、は、前記式(2)におけるものと同義であり、
R3Aは、各々独立して、置換基を有していてもよい炭素数1~30の直鎖状、分岐状若しくは環状のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、
R4Aは、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R4Aの少なくとも1つは下記式(0-2)で表される基であり、
m6Aは、各々独立して、0~5の整数である。)
(式(0-2)中、RXは、前記式(0-1)におけるものと同義であり、sは、0~30の整数である。)
[7]
[1]に記載の化合物をモノマーとして得られる、樹脂。
[8]
下記式(3)で表される構造を有する、[7]に記載の樹脂。
(式(3)中、Lは、置換基を有していてもよい炭素数1~30のアルキレン基、置換基を有していてもよい炭素数6~30のアリーレン基、置換基を有していてもよい炭素数1~30のアルコキシレン基又は単結合であり、前記アルキレン基、前記アリーレン基、前記アルコキシレン基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、
R0は、前記RYと同義であり、
R1は、炭素数1~60のn価の基又は単結合であり、
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは前記式(0-1)で表される基を含み、
m2及びm3は、各々独立して、0~8の整数であり、
m4及びm5は、各々独立して、0~9の整数であり、
但し、m2、m3、m4及びm5は同時に0になることはなく、
nは前記Nと同義であり、ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよく、
p2~p5は、前記rと同義である。)
[9]
下記式(4)で表される構造を有する、[7]に記載の樹脂。
(式(4)中、Lは、置換基を有していてもよい炭素数1~30のアルキレン基、置換基を有していてもよい炭素数6~30のアリーレン基、置換基を有していてもよい炭素数1~30のアルコキシレン基又は単結合であり、前記アルキレン基、前記アリーレン基、前記アルコキシレン基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、
R0Aは、前記RYと同義であり、
R1Aは、炭素数1~30のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは前記式(0-1)で表される基を含み、
nAは、上記Nと同義であり、ここで、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよく、
XAは、酸素原子、硫黄原子又は無架橋であることを示し、
m2Aは、各々独立して、0~7の整数であり、但し、少なくとも1つのm2Aは1~6の整数であり、
qAは、各々独立して、0又は1である。)
[10]
[1]~[6]のいずれかに記載の化合物及び[7]~[9]のいずれかに記載の樹脂からなる群より選ばれる1種以上を含有する、組成物。
[11]
溶媒をさらに含有する、[10]に記載の組成物。
[12]
酸発生剤をさらに含有する、[10]又は[11]に記載の組成物。
[13]
架橋剤をさらに含有する、[10]~[12]のいずれかに記載の組成物。
[14]
前記架橋剤は、フェノール化合物、エポキシ化合物、シアネート化合物、アミノ化合物、ベンゾオキサジン化合物、メラミン化合物、グアナミン化合物、グリコールウリル化合物、ウレア化合物、イソシアネート化合物及びアジド化合物からなる群より選ばれる少なくとも1種である、[13]に記載の組成物。
[15]
前記架橋剤は、少なくとも1つのアリル基を有する、[13]又は[14]に記載の組成物。
[16]
前記架橋剤の含有割合が、[1]~[6]のいずれかに記載の化合物及び[7]~[9]のいずれかに記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.1~100質量部である、[13]~[15]のいずれかに記載の組成物。
[17]
架橋促進剤をさらに含有する、[13]~[16]のいずれかに記載の組成物。
[18]
前記架橋促進剤は、アミン類、イミダゾール類、有機ホスフィン類、及びルイス酸からなる群より選ばれる少なくとも1種である、[17]に記載の組成物。
[19]
前記架橋促進剤の含有割合が、[1]~[6]のいずれかに記載の化合物及び[7]~[9]のいずれかに記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.1~5質量部である、[17]又は[18]に記載の組成物。
[20]
ラジカル重合開始剤をさらに含有する、[10]~[19]のいずれかに記載の組成物。
[21]
前記ラジカル重合開始剤は、ケトン系光重合開始剤、有機過酸化物系重合開始剤及びアゾ系重合開始剤からなる群より選ばれる少なくとも1種である、[10]~[20]のいずれかに記載の組成物。
[22]
前記ラジカル重合開始剤の含有割合が、[1]~[6]のいずれかに記載の化合物及び[7]~[9]のいずれかに記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.05~25質量部である、[10]~[21]のいずれかに記載の組成物。
[23]
リソグラフィー用膜形成に用いられる、[10]~[22]のいずれかに記載の組成物。
[24]
レジスト永久膜形成に用いられる、[10]~[22]のいずれかに記載の組成物。
[25]
光学部品形成に用いられる、[10>~[22]のいずれかに記載の組成物。
[26]
基板上に、[23]に記載の組成物を用いてフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像を行う工程を含む、レジストパターン形成方法。
[27]
基板上に、[23]に記載の組成物を用いて下層膜を形成し、前記下層膜上に、少なくとも1層のフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像を行う工程を含む、レジストパターン形成方法。
[28]
基板上に、[23]に記載の組成物を用いて下層膜を形成し、前記下層膜上に、レジスト中間層膜材料を用いて中間層膜を形成し、前記中間層膜上に、少なくとも1層のフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成し、その後、前記レジストパターンをマスクとして前記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして前記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることにより基板にパターンを形成する工程を含む、回路パターン形成方法。
さらには、屈折率が高く、また低温から高温までの広範囲の熱処理によって着色が抑制されることから、各種光学形成組成物としても有用である。
本実施形態の化合物は、下記式(0)で表される。
(式(0)中、RYは、水素原子、炭素数1~30のアルキル基又は炭素数6~30のアリール基であり、
RZは、炭素数1~60のN価の基又は単結合であり、
RTは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が下記式(0-1)で表される基で置換された基であり、上記アルキル基、上記アリール基、上記アルケニル基、上記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、RTの少なくとも1つは下記式(0-1)で表される基を含み、
Xは、酸素原子、硫黄原子又は無架橋であることを示し、
mは、各々独立して0~9の整数であり、ここで、mの少なくとも1つは1~9の整数であり、
Nは、1~4の整数であり、Nが2以上の整数の場合、N個の[ ]内の構造式は同一であっても異なっていてもよく、
rは、各々独立して0~2の整数である。)
ここで、水酸基の水素原子がビニルフェニルメチル基で置換された基とは、ビニルフェニルメチル基を有する基であり、例えば、ビニルフェニルメチル基、ビニルフェニルメチルメチル基、ビニルフェニルメチルフェニル基等が挙げられる。
本実施形態における式(0)で表される化合物は、下記式(1)で表される化合物であることが好ましい。本実施形態の化合物は、下記式(1)で表される化合物であることにより、耐熱性がより高く、溶媒溶解性もより高い傾向にある。
R1は、炭素数1~60のn価の基又は単結合であり、このR1を介して各々の芳香環が結合している。
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が上記式(0-1)で表される基で置換された基であり、上記アルキル基、上記アリール基、上記アルケニル基、上記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは上記式(0-1)で表される基を含む。
m2及びm3は、各々独立して、0~8の整数であり、m4及びm5は、各々独立して、0~9の整数である。但し、m2、m3、m4及びm5は同時に0になることはない。
nは上記Nと同義であり、1~4の整数である。ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよい。
p2~p5は各々独立して0~2の整数である。
なお、上記アルキル基、アルケニル基及びアルコキシ基は、直鎖状、分岐状若しくは環状の基であってもよい。
R0、R1、R4、R5、n、p2~p5、m4及びm5は、上記式(1)におけるものと同義であり、
R6~R7は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、
R10~R11は、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R10~R11の少なくとも1つは下記式(0-2)で表される基であり、
m6及びm7は、各々独立して0~7の整数であり、
但し、m4、m5、m6及びm7は同時に0になることはない。
R0、R1、R6、R7、R10、R11、n、p2~p5、m6及びm7は、上記式(1-1)におけるものと同義であり、
R8~R9は、上記R6~R7と同義であり、
R12~R13は、上記R10~R11と同義であり、
m8及びm9は、各々独立して、0~8の整数である。但し、m6、m7、m8及びm9は同時に0になることはない。
但し、R2、R3、R4、R5から選ばれる少なくとも1つは下記式(0-1)で表される基を含み、m2、m3、m4、m5が同時に0となることはない。
本実施形態で使用される式(1)で表される化合物は、公知の手法を応用して適宜合成することができ、その合成手法は特に限定されない。
例えば、常圧下、ビフェノール類、ビナフトール類又はビアントラセンオールと、対応するアルデヒド類又はケトン類とを酸触媒下にて重縮合反応させることによりポリフェノール化合物を得て、続いて、ポリフェノール化合物の少なくとも1つのフェノール性水酸基に、下記式(0-1A)で表される基を導入することにより得られる。
また、下記式(0-1B)で表される基を導入して、そのヒドロキシ基に下記式(0-1A)で表される基を導入することによっても得られる。また、必要に応じて、加圧下で行うこともできる。
アルデヒド類又はケトン類として、芳香環を有するアルデヒド又は芳香族を有するケトンを用いることが、高い耐熱性及び高いエッチング耐性を兼備する点で好ましい。
例えば、以下のようにして、上記化合物の少なくとも1つのフェノール性水酸基に式(0-1B)で表される基を導入して、そのヒドロキシ基に式(0-1A)で表される基を導入することができる。
その後、アセトン、テトラヒドロフラン(THF)、プロピレングリコールモノメチルエーテルアセテート等の非プロトン性溶媒に上記化合物を溶解又は懸濁させる。続いて、水酸化ナトリウム、水酸化カリウム、ナトリウムメトキサイド、ナトリウムエトキサイド等の塩基触媒の存在下、常圧で、20~150℃、6~72時間反応させる。反応液を酸で中和し、蒸留水に加え白色固体を析出させた後、分離した固体を蒸留水で洗浄し、又は溶媒を蒸発乾固させて、必要に応じて蒸留水で洗浄し、乾燥することにより、ヒドロキシ基の水素原子が式(0-1A)で表される基で置換された基に置換された化合物を得ることができる。
上記式(1)で表される化合物は、リソグラフィー用膜形成組成物や光学部品形成に用いられる組成物(以下、単に「組成物」ともいう。)として、そのまま使用することができる。また、上記式(1)で表される化合物をモノマーとして得られる樹脂を、組成物として使用することもできる。樹脂は、例えば、上記式(1)で表される化合物と架橋反応性のある化合物とを反応させて得られる。
R0は、上記RYと同義であり、
R1は、炭素数1~60のn価の基又は単結合であり、
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が酸解離性基で置換された基であり、上記アルキル基、上記アリール基、上記アルケニル基、上記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは上記式(0-1)で表される基を含み、
m2及びm3は、各々独立して、0~8の整数であり、
m4及びm5は、各々独立して、0~9の整数であり、
但し、m2、m3、m4及びm5は同時に0になることはなく、
nは上記Nと同義であり、ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよく、
p2~p5は、上記rと同義である。
本実施形態の樹脂は、上記式(1)で表される化合物を架橋反応性のある化合物と反応させることにより得られる。架橋反応性のある化合物としては、上記式(1)で表される化合物をオリゴマー化又はポリマー化し得るものである限り、公知のものを特に制限なく使用することができる。その具体例としては、例えば、アルデヒド、ケトン、カルボン酸、カルボン酸ハライド、ハロゲン含有化合物、アミノ化合物、イミノ化合物、イソシアネート、不飽和炭化水素基含有化合物等が挙げられるが、これらに特に限定されない。
本実施形態における式(0)で表される化合物は、下記式(2)で表される化合物であることが好ましい。本実施形態の化合物は、下記式(2)で表される化合物であることにより、耐熱性が高く、溶媒溶解性も高い傾向にある。
R1Aは、炭素数1~60のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子がビニルフェニルメチル基で置換された基であり、上記アルキル基、上記アリール基、上記アルケニル基、上記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは上記式(0-1)で表される基を含む。
nAは1~4の整数であり、ここで、式(2)中、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよい。
XAは、各々独立して、酸素原子、硫黄原子又は無架橋であることを示す。ここで、XAが酸素原子又は硫黄原子である場合、高い耐熱性を発現する傾向にあるため好ましく、酸素原子であることがより好ましい。XAは、溶解性の観点からは、無架橋であることが好ましい。
m2Aは、各々独立して、0~6の整数である。但し、少なくとも1つのm2Aは1~6の整数である。
qAは、各々独立して、0又は1である。
R3Aは、各々独立して、置換基を有していてもよい炭素数1~30の直鎖状、分岐状若しくは環状のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、同一のナフタレン環又はベンゼン環において同一であっても異なっていてもよい。
R4Aは、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R4Aの少なくとも1つは下記式(0-2)で表される基であり、
m6Aは、各々独立して、0~5の整数である。
(式(0-2)中、RXは、前記式(0-1)におけるものと同義であり、sは、0~30の整数である。)
本実施形態で使用される式(2)で表される化合物は、公知の手法を応用して適宜合成することができ、その合成手法は特に限定されない。
例えば、常圧下、フェノール類、ナフトール類と、対応するアルデヒド類又はケトン類とを酸触媒下にて重縮合反応させることによりポリフェノール化合物を得て、続いて、ポリフェノール化合物の少なくとも1つのフェノール性水酸基に、下記式(0-1A)で表される基を導入することにより得られる。
または、下記式(0-1B)で表される基を導入して、そのヒドロキシ基に式(0-1A)で示される基を導入することにより得られる。また、必要に応じて、加圧下で行うこともできる。
上記式(2)で表される化合物は、リソグラフィー用膜形成組成物や光学部品形成に用いられる組成物として、そのまま使用することができる。また、上記式(2)で表される化合物をモノマーとして得られる樹脂を、組成物として使用することができる。樹脂は、例えば、上記式(2)で表される化合物と架橋反応性のある化合物とを反応させて得られる樹脂としても使用することができる。
R0Aは、上記RYと同義であり、
R1Aは、炭素数1~30のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が上記式(0-1)で表される基で置換された基であり、上記アルキル基、上記アリール基、上記アルケニル基、上記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは上記式(0-1)で表される基を含み、
nAは、上記Nと同義であり、ここで、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよく、
XAは、酸素原子、硫黄原子又は無架橋であることを示し、
m2Aは、各々独立して、0~7の整数であり、但し、少なくとも1つのm2Aは1~6の整数であり、
qAは、各々独立して、0又は1である。
本実施形態の樹脂は、上記式(2)で表される化合物を架橋反応性のある化合物と反応させることにより得られる。
本実施形態の化合物及び/又は樹脂の精製方法は、上記式(1)で表される化合物、上記式(1)で表される化合物をモノマーとして得られる樹脂、上記式(2)で表される化合物及び上記式(2)で表される化合物をモノマーとして得られる樹脂から選ばれる1種以上を、溶媒に溶解させて溶液(S)を得る工程と、得られた溶液(S)と酸性の水溶液とを接触させて、上記化合物及び/又は上記樹脂中の不純物を抽出する工程(第一抽出工程)とを含み、上記溶液(S)を得る工程で用いる溶媒が、水と任意に混和しない有機溶媒を含む。
本実施形態の組成物は、上記式(1)で表される化合物、上記式(1)で表される化合物をモノマーとして得られる樹脂、上記式(2)で表される化合物及び上記式(2)で表される化合物をモノマーとして得られる樹脂からなる群より選ばれる1種以上を含有する。また、本実施形態の組成物は、リソグラフィー用膜形成組成物や光学部品形成組成物であることができる。
本実施形態における化学増幅型レジスト用途向けリソグラフィー用膜形成組成物(以下、「レジスト組成物」ともいう。)は、上記式(1)で表される化合物、上記式(1)で表される化合物をモノマーとして得られる樹脂、上記式(2)で表される化合物及び上記式(2)で表される化合物をモノマーとして得られる樹脂からなる群より選ばれる1種以上をレジスト基材として含有する。
本実施形態のレジスト組成物において、レジスト基材として用いる化合物及び/又は樹脂の含有量は、特に限定されないが、固形成分の全質量(レジスト基材、酸発生剤(C)、架橋剤(G)、酸拡散制御剤(E)及びその他の成分(F)等の任意に使用される成分を含む固形成分の総和、以下同様。)の50~99.4質量%であることが好ましく、より好ましくは55~90質量%、さらに好ましくは60~80質量%、特に好ましくは60~70質量%である。レジスト基材として用いる化合物及び/又は樹脂の含有量が上記範囲である場合、解像度が一層向上し、ラインエッジラフネス(LER)が一層小さくなる傾向にある。
なお、レジスト基材として化合物と樹脂の両方を含有する場合、上記含有量は、両成分の合計量である。
本実施形態のレジスト組成物には、本発明の目的を阻害しない範囲で、必要に応じて、レジスト基材、酸発生剤(C)、架橋剤(G)及び酸拡散制御剤(E)以外の成分として、溶解促進剤、溶解制御剤、増感剤、界面活性剤、有機カルボン酸又はリンのオキソ酸若しくはその誘導体、熱及び/又は光硬化触媒、重合禁止剤、難燃剤、充填剤、カップリング剤、熱硬化性樹脂、光硬化性樹脂、染料、顔料、増粘剤、滑剤、消泡剤、レベリング剤、紫外線吸収剤、界面活性剤、着色剤、ノニオン系界面活性剤等の各種添加剤を1種又は2種以上添加することができる。なお、本明細書において、その他の成分(F)を任意成分(F)ということがある。
好ましくは50~99.4/0.001~49/0.5~49/0.001~49/0~49、
より好ましくは55~90/1~40/0.5~40/0.01~10/0~5、
さらに好ましくは60~80/3~30/1~30/0.01~5/0~1、
特に好ましくは60~70/10~25/2~20/0.01~3/0、である。
各成分の配合割合は、その総和が100質量%になるように各範囲から選ばれる。各成分の配合割合が上記範囲である場合、感度、解像度、現像性等の性能に優れる傾向にある。
本実施形態のレジスト組成物を用いて、スピンコートによりアモルファス膜を形成することができる。また、本実施形態のレジスト組成物は、一般的な半導体製造プロセスに適用することができる。上記式(1)及び/又は式(2)で表される化合物、これらをモノマーとして得られる樹脂の種類及び/又は用いる現像液の種類によって、ポジ型レジストパターン及びネガ型レジストパターンのいずれかを作り分けることができる。
本実施形態の非化学増幅型レジスト用途向けリソグラフィー用膜形成組成物(以下、「感放射線性組成物」ともいう。)に含有させる成分(A)は、後述するジアゾナフトキノン光活性化合物(B)と併用し、g線、h線、i線、KrFエキシマレーザー、ArFエキシマレーザー、極端紫外線、電子線又はX線を照射することにより、現像液に易溶な化合物となるポジ型レジスト用基材として有用である。g線、h線、i線、KrFエキシマレーザー、ArFエキシマレーザー、極端紫外線、電子線又はX線により、成分(A)の性質は大きくは変化しないが、現像液に難溶なジアゾナフトキノン光活性化合物(B)が易溶な化合物に変化することで、現像工程によってレジストパターンを作り得る。
本実施形態の感放射線性組成物に含有させるジアゾナフトキノン光活性化合物(B)は、ポリマー性及び非ポリマー性ジアゾナフトキノン光活性化合物を含む、ジアゾナフトキノン物質であり、一般にポジ型レジスト組成物において、感光性成分(感光剤)として用いられているものであれば特に制限なく、1種又は2種以上を任意に選択して用いることができる。
本実施形態の感放射線性組成物は、スピンコートによりアモルファス膜を形成することができる。また本実施形態の感放射線性組成物は、一般的な半導体製造プロセスに適用することができる。用いる現像液の種類によって、ポジ型レジストパターン及びネガ型レジストパターンのいずれかを作り分けることができる。
本実施形態の感放射線性組成物において、成分(A)の含有量は、固形成分全重量(成分(A)、ジアゾナフトキノン光活性化合物(B)及びその他の成分(D)等の任意に使用される固形成分の総和、以下同様。)に対して、好ましくは1~99質量%であり、より好ましくは5~95質量%、さらに好ましくは10~90質量%、特に好ましくは25~75質量%である。本実施形態の感放射線性組成物は、成分(A)の含有量が上記範囲内であると、高感度でラフネスの小さなパターンを得ることができる傾向にある。
本実施形態の感放射線性組成物には、本発明の目的を阻害しない範囲で、必要に応じて、成分(A)及びジアゾナフトキノン光活性化合物(B)以外の成分として、酸発生剤、架橋剤、酸拡散制御剤、溶解促進剤、溶解制御剤、増感剤、界面活性剤、有機カルボン酸又はリンのオキソ酸若しくはその誘導体、熱及び/又は光硬化触媒、重合禁止剤、難燃剤、充填剤、カップリング剤、熱硬化性樹脂、光硬化性樹脂、染料、顔料、増粘剤、滑剤、消泡剤、レベリング剤、紫外線吸収剤、界面活性剤、着色剤、ノニオン系界面活性剤等の各種添加剤を1種又は2種以上添加することができる。なお、本明細書において、その他の成分(D)を任意成分(D)ということがある。
好ましくは1~99/99~1/0~98、
より好ましくは5~95/95~5/0~49、
さらに好ましくは10~90/90~10/0~10、
よりさらに好ましくは20~80/80~20/0~5、
さらにより好ましくは25~75/75~25/0、である。
各成分の配合割合は、その総和が100質量%になるように各範囲から選ばれる。本実施形態の感放射線性組成物は、各成分の配合割合を上記範囲にすると、ラフネスに加え、感度、解像度等の性能に優れる傾向にある。
本実施形態によるレジストパターンの形成方法は、上述した本実施形態のレジスト組成物又は感放射線性組成物を用いて基板上にフォトレジスト層を形成した後、上記フォトレジスト層の所定の領域に放射線を照射し、現像を行う工程を含む。具体的には、基板上にレジスト膜を形成する工程と、形成されたレジスト膜を露光する工程と、上記レジスト膜を現像してレジストパターンを形成する工程とを備える。本実施形態におけるレジストパターンは多層プロセスにおける上層レジストとして形成することもできる。
本実施形態の下層膜用途向けリソグラフィー用膜形成組成物(以下、「下層膜形成材料」ともいう。)は、上記式(1)表される化合物、上記式(1)表される化合物をモノマーとして得られる樹脂、式(2)で表される化合物及び式(2)で表される化合物をモノマーとして得られる樹脂からなる群より選ばれる少なくとも1種の物質を含有する。本実施形態において上記物質は塗布性及び品質安定性の点から、下層膜形成材料中、1~100質量%であることが好ましく、10~100質量%であることがより好ましく、50~100質量%であることがさらに好ましく、100質量%であることが特に好ましい。
本実施形態の下層膜形成材料は、溶媒を含有してもよい。本実施形態の下層膜形成材料に用いられる溶媒としては、上述した物質が少なくとも溶解するものであれば、公知のものを適宜用いることができる。
本実施形態の下層膜形成材料は、インターミキシングを抑制する等の観点から、必要に応じて架橋剤を含有していてもよい。本実施形態で使用可能な架橋剤は特に限定されないが、例えば、国際公開第2013/024779号に記載のものを用いることができる。
本実施形態の下層膜形成材料には、必要に応じて架橋、硬化反応を促進させるための架橋促進剤を用いることができる。
本実施形態の下層膜形成材料には、必要に応じてラジカル重合開始剤を配合することができる。ラジカル重合開始剤としては、光によりラジカル重合を開始させる光重合開始剤であってもよいし、熱によりラジカル重合を開始させる熱重合開始剤であってもよい。
本実施形態の下層膜形成材料は、熱による架橋反応をさらに促進させる等の観点から、必要に応じて酸発生剤を含有していてもよい。酸発生剤としては、熱分解によって酸を発生するもの、光照射によって酸を発生するもの等が知られているが、いずれのものも使用することができる。例えば、国際公開第2013/024779号に記載のものを用いることができる。
さらに、本実施形態の下層膜形成材料は、保存安定性を向上させる等の観点から、塩基性化合物を含有していてもよい。
また、本実施形態における下層膜形成材料は、熱や光による硬化性の付与や吸光度をコントロールする目的で、他の樹脂及び/又は化合物を含有していてもよい。このような他の樹脂及び/又は化合物としては、ナフトール樹脂、キシレン樹脂ナフトール変性樹脂、ナフタレン樹脂のフェノール変性樹脂、ポリヒドロキシスチレン、ジシクロペンタジエン樹脂、(メタ)アクリレート、ジメタクリレート、トリメタクリレート、テトラメタクリレート、ビニルナフタレン、ポリアセナフチレン等のナフタレン環、フェナントレンキノン、フルオレン等のビフェニル環、チオフェン、インデン等のヘテロ原子を有する複素環を含む樹脂や芳香族環を含まない樹脂;ロジン系樹脂、シクロデキストリン、アダマンタン(ポリ)オール、トリシクロデカン(ポリ)オール及びそれらの誘導体等の脂環構造を含む樹脂又は化合物等が挙げられるが、これらに特に限定されない。さらに、本実施形態における下層膜形成材料は、公知の添加剤を含有していてもよい。上記公知の添加剤としては、以下に限定されないが、例えば、熱及び/又は光硬化触媒、重合禁止剤、難燃剤、充填剤、カップリング剤、熱硬化性樹脂、光硬化性樹脂、染料、顔料、増粘剤、滑剤、消泡剤、レベリング剤、紫外線吸収剤、界面活性剤、着色剤、ノニオン系界面活性剤等が挙げられる。
本実施形態におけるリソグラフィー用下層膜は、上記下層膜形成材料から形成される。
より詳しくは、基板上に、本実施形態の下層膜形成材料を用いて下層膜を形成する工程(B-1)と、上記下層膜上に、珪素原子を含有するレジスト中間層膜材料を用いて中間層膜を形成する工程(B-2)と、上記中間層膜上に、少なくとも1層のフォトレジスト層を形成する工程(B-3)と、上記工程(B-3)の後、上記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成する工程(B-4)と、上記工程(B-4)の後、上記レジストパターンをマスクとして上記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして上記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることで基板にパターンを形成する工程(B-5)と、を有する。
下記装置を用いて有機元素分析により炭素濃度及び酸素濃度(質量%)を測定した。
装置:CHNコーダーMT-6(ヤナコ分析工業(株)製)
化合物の分子量は、LC-MS分析により、Water社製Acquity UPLC/MALDI-Synapt HDMSを用いて測定した。
また、以下の条件でゲル浸透クロマトグラフィー(GPC)分析を行い、ポリスチレン換算の重量平均分子量(Mw)、数平均分子量(Mn)、及び分散度(Mw/Mn)を求めた。
装置:Shodex GPC-101型(昭和電工(株)製)
カラム:KF-80M×3
溶離液:THF 1mL/min
温度:40℃
23℃にて、化合物をプロピレングリコールモノメチルエーテル(PGME)、シクロヘキサノン(CHN)、乳酸エチル(EL)、メチルアミルケトン(MAK)又はテトラメチルウレア(TMU)に対して3質量%溶液になるよう攪拌して溶解させた後、1週間後の結果を以下の基準で評価した。
評価A:目視にていずれかの溶媒で析出物がないことを確認した。
評価C:目視にていずれかの溶媒で析出物があることを確認した。
化合物の構造は、Bruker社製「Advance600II spectrometer」を用いて、以下の条件で、1H-NMR測定を行い、確認した。
周波数:400MHz
溶媒:d6-DMSO
内部標準:TMS
測定温度:23℃
攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に2,6-ナフタレンジオール(シグマ-アルドリッチ社製試薬)3.20g(20mmol)と4-ビフェニルカルボキシアルデヒド(三菱瓦斯化学社製)1.82g(10mmol)とを30mLメチルイソブチルケトンに仕込み、95%の硫酸5mLを加えて、反応液を100℃で6時間撹拌して反応を行った。次に反応液を濃縮し、純水50gを加えて反応生成物を析出させ、室温まで冷却した後、濾過を行って分離した。得られた固形物を濾過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(XBisN-1)で表される目的化合物が3.05g得られた。400MHz-1H-NMRにより下記式(XBisN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)9.7(2H,O-H)、7.2~8.5(19H,Ph-H)、6.6(1H,C-H)
尚、2,6-ナフタレンジオールの置換位置が1位であることは、3位と4位のプロトンのシグナルがダブレットであることから確認した。
攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記式(XBisN-1)で表される化合物10g(21mmol)と炭酸カリウム14.8g(107mmol)とを50mLジメチルホルムアミドに仕込み、酢酸-2-クロロエチル6.56g(54mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記結晶40g、メタノール40g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で4時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(E-XBisN-1)で表される目的化合物が5.9g得られた。400MHz-1H-NMRにより下記式(E-XBisN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)8.6(2H,O-H)、7.2~7.8(19H,Ph-H)、6.7(1H,C-H)、4.0(4H,-O-CH2-)、3.8(4H,-CH2-OH)
攪拌機、冷却管及びビュレットを備えた内容積200mLの容器を準備した。この容器に、4,4-ビフェノール(東京化成社製試薬)30g(161mmol)と、4-ビフェニルアルデヒド(三菱瓦斯化学社製)15g(82mmol)と、酢酸ブチル100mLとを仕込み、p-トルエンスルホン酸(関東化学社製試薬)3.9g(21mmol)を加えて、反応液を調製した。この反応液を90℃で3時間撹拌して反応を行った。次に、反応液を濃縮し、ヘプタン50gを加えて反応生成物を析出させ、室温まで冷却した後、濾過を行って分離した。濾過により得られた固形物を乾燥させた後、カラムクロマトによる分離精製を行うことにより、下記式(BisF-1)で表される目的化合物5.8gを得た。400MHz-1H-NMRにより以下のピークが見出され、下記式(BisF-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)9.4(4H,O-H)、6.8~7.8(22H,Ph-H)、6.2(1H,C-H)
また、得られた化合物について、上記方法により分子量を測定した結果、536であった。
攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記式(BisF-1)で表される化合物11.2g(21mmol)と炭酸カリウム14.8g(107mmol)とを50mLジメチルホルムアミドに仕込み、酢酸-2-クロロエチル6.56g(54mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記結晶40g、メタノール40g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で4時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(E-BisF-1)で表される目的化合物が5.9g得られた。400MHz-1H-NMRにより、下記式(E-BisF-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)8.6(4H,O-H)、6.8~7.8(22H,Ph-H)、6.2(1H,C-H)、4.0(8H,-O-CH2-)、3.8(8H,-CH2-OH)
また、得られた化合物について、上記方法により分子量を測定した結果、712であった。
攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記式(XBisN-1)で表される化合物10.0g(21mmol)、2-イソシアナトエチルメタクリレート6.1g、トリエチルアミン0.5g、p-メトキシフェノール0.05gとを50mLメチルイソブチルケトンに仕込み、80℃に加温して撹拌した状態で、24時間撹拌して反応を行った。50℃まで冷却し、反応液を純水中に滴下して析出した固形物を濾過し、乾燥させた後、カラムクロマトによる分離精製を行い、下記式(UaXBisN-1)で表される目的化合物が3.0g得られた。400MHz-1H-NMRにより、下記式(UaXBisN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)
7.2~7.8(19H,Ph-H)、6.8(2H、NH)、6.7(1H,C-H)、6.5(4H,=CH2)、3.1~4.6(8H,-O-CH2-CH2-N-)、2.0(6H,-CH3)
また、得られた化合物について、上記方法により分子量を測定した結果、776であった。
熱分解温度は370℃、ガラス転移点は90℃、融点は200℃であり、高耐熱性が確認できた。
上記式(XBisN-1)で表される化合物の代わりに、上記式(E-XBisN-1)で表される化合物を用いた以外、合成実施例1と同様に反応させ、下記式(UaE-XBisN-1)で表される目的化合物が3.2g得られた。400MHz-1H-NMRにより、下記式(UaE-XBisN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
7.2~7.8(19H,Ph-H)、6.8(2H、NH)、6.7(1H,C-H)、6.5(4H,=CH2)、3.1~4.6(16H,-O-CH2-CH2-O-、-O-CH2-CH2-N-)、2.0(6H,-CH3)
また、得られた化合物について、上記方法により分子量を測定した結果、864であった。
熱分解温度は360℃、ガラス転移点は85℃、融点は195℃であり、高耐熱性が確認できた。
上記式(XBisN-1)で表される化合物の代わりに、上記式(BisF-1)で表される化合物を用いた以外、合成実施例1-1と同様に反応させ、下記式(UaBisF-1)で表される目的化合物が2.5g得られた。400MHz-1H-NMRにより、下記式(UaBisF-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)6.8~7.8(22H,Ph-H)、6.5(8H,=CH2)、6.2(1H,C-H)、4.1~4.7(16H,-O-CH2-CH2-N-)、2.0(12H,-CH3) また、得られた化合物について、上記方法により分子量を測定した結果、1156であった。
熱分解温度は365℃、ガラス転移点は65℃、融点は185℃であり、高耐熱性が確認できた。
上記式(XBisN-1)で表される化合物の代わりに、上記式(E-BisF-1)で表される化合物を用いた以外、合成実施例1-2と同様に反応させ、下記式(UaE-BisF-1)で表される目的化合物が2.6g得られた。400MHz-1H-NMRにより、下記式(UaE-BisF-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)6.8~7.8(22H,Ph-H)、6.5(8H,=CH2)、6.2(1H,C-H)、4.1~4.7(32H,-O-CH2-CH2-O-、-O-CH2-CH2-N-)、2.0(12H,-CH3)
また、得られた化合物について、上記方法により分子量を測定した結果、1133であった。
熱分解温度は355℃、ガラス転移点は60℃、融点は175℃であり、高耐熱性が確認できた。
攪拌機、冷却管及びビュレットを備えた内容積300mLの容器において、2-ナフトール(シグマ-アルドリッチ社製試薬)10g(69.0mmol)を120℃で溶融後、硫酸0.27gを仕込み、4-アセチルビフェニル(シグマ-アルドリッチ社製試薬)2.7g(13.8mmol)を加えて、内容物を120℃で6時間撹拌して反応を行って反応液を得た。次に反応液にN-メチル-2-ピロリドン(関東化学株式会社製)100mL、純水50mLを加えたあと、酢酸エチルにより抽出した。次に純水を加えて中性になるまで分液後、濃縮を行って溶液を得た。
得られた溶液を、カラムクロマトによる分離後、下記式(BiN-1)で表される目的化合物(BiN-1)が1.0g得られた。
得られた化合物(BiN-1)について、上述の方法により分子量を測定した結果、466であった。
得られた化合物(BiN-1)について、上述の測定条件で、NMR測定を行ったところ、以下のピークが見出され、下記式(BiN-1)の化学構造を有することを確認した。
δ(ppm)9.69(2H,O-H)、7.01~7.67(21H,Ph-H)、2.28(3H,C-H)
攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に上記式で示される化合物(BisN-1)10.5g(21mmol)と炭酸カリウム14.8g(107mmol)とを50mLジメチルホルムアミドに仕込み、酢酸-2-クロロエチル6.56g(54mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に前記結晶40g、メタノール40g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で5時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させた後、カラムクロマトグラフによる分離精製を行い、下記式で示される目的化合物を4.6g得た。400MHz-1H-NMRにより下記式の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)8.6(2H,O-H)、7.2~7.8(19H,Ph-H)、6.7(1H,C-H)、4.0(4H,-O-CH2-)、3.8(4H,-CH2-OH)
上記式(XBisN-1)で表される化合物の代わりに、上記式(BiN-1)で表される化合物を用いたこと以外は合成実施例1-1と同様に反応させ、下記式(UaBiN-1)で表される目的化合物3.5gを得た。
400MHz-1H-NMRにより、下記式(UaBiN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)7.2~7.8(21H,Ph-H)、6.8(2H、NH)、6.7(1H,C-H)、6.5(4H,=CH2)、3.1~4.6(16H,-O-CH2-CH2-O-、-O-CH2-CH2-N-)、2.3(3H,-CH3)、2.0(6H,-CH3)
熱分解温度は390℃、ガラス転移点は72℃、融点は224℃であり、高耐熱性を有することが確認できた。
上記式(XBisN-1)で表される化合物の代わりに、上記式(E-BiN-1)で表される化合物を用いたこと以外、合成実施例1-2と同様に反応させ、下記式(UaE-BiN-1)で表される目的化合物3.9gを得た。
400MHz-1H-NMRにより、下記式(UaE-BiN-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)7.2~7.8(21H,Ph-H)、6.8(2H、NH)、6.7(1H,C-H)、6.5(4H,=CH2)、3.1~4.6(16H,-O-CH2-CH2-O-、-O-CH2-CH2-N-)、2.3(3H,-CH3)、2.0(6H,-CH3)
熱分解温度は362℃、ガラス転移点は70℃、融点は226℃であり、高耐熱性を有することが確認できた。
2-ナフトールの代わりに、o-フェニルフェノールを使用する以外は合成例1と同様に反応させ、下記式(BiP-1)で表される目的化合物が1.0g得られた。
得られた化合物(BiP-1)について、上述の方法により分子量を測定した結果、466であった。
得られた化合物(BiP-1)について、上述の測定条件で、NMR測定を行ったところ、以下のピークが見出され、下記式(BiP-1)の化学構造を有することを確認した。
δ(ppm)9.67(2H,O-H)、6.98~7.60(25H,Ph-H)、2.25(3H,C-H)
攪拌機、冷却管及びビュレットを備えた内容積100mlの容器に上記式(BiP-1)で表される化合物11.2g(21mmol)と炭酸カリウム14.8g(107mmol)とを50mLジメチルホルムアミドに仕込み、酢酸-2-クロロエチル6.56g(54mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に前記結晶40g、メタノール40g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で4時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させた後、カラムクロマトグラフによる分離精製を行い、下記式(E-BisF-1)で表される目的化合物5.9gを得た。
400MHz-1H-NMRにより、下記式(E-BiP-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)8.6(4H,O-H)、6.8~7.6(25H,Ph-H)、4.0(4H,-O-CH2-)、3.8(4H,-CH2-OH)、2.2(3H,C-H)
得られた化合物について、前記方法により分子量を測定した結果、606であった。
上記式(XBisN-1)で表される化合物の代わりに、上記式(BiP-1)で表される化合物を用いたこと以外は合成実施例1-2と同様に反応させ、下記式(UaBiP-1)で表される目的化合物6.6gを得た。
400MHz-1H-NMRにより、下記式(UaBiP-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)6.8~7.8(25H,Ph-H)、6.5(4H,=CH2)、4.1~4.7(8H,-O-CH2-CH2-N-)、2.3(3H,-CH3)、2.0(6H,-CH3)
熱分解温度は371℃、ガラス転移点は84℃、融点は232℃であり、高耐熱性を有することが確認できた。
上記式(XBisN-1)で表される化合物の代わりに、上記式(E-BiP-1)で表される化合物を用いたこと以外、合成実施例1-2と同様に反応させ、下記式(UaE-BiP-1)で表される目的化合物4.6gを得た。
400MHz-1H-NMRにより、下記式(UaE-BiP-1)の化学構造を有することを確認した。
1H-NMR:(d-DMSO、内部標準TMS)
δ(ppm)6.8~7.8(25H,Ph-H)、6.8(2H、NH)、6.5(4H,=CH2)、3.1~4.6(16H,-O-CH2-CH2-O-、-O-CH2-CH2-N-)、2.3(3H,-CH3)2.0(6H,-CH3)
熱分解温度は372℃、ガラス転移点は70℃、融点は210℃であり、高耐熱性を有することが確認できた。
合成例3の原料である2-ナフトール(原料1)及び4-アセチルビフェニル(原料2)を表1のように変更し、その他は合成例3と同様に行い、各目的物を得た。
各目的化合物は、1H-NMRで同定した(表2)。
合成実施例1の原料である4-ビフェニルアルデヒド(原料2)を表3のように変更し、その他は合成実施例3と同様に行い、各目的化合物を得た。
各目的化合物は、1H-NMRで同定した(表4)。
合成例3の原料である2-ナフトール(原料1)及び4-アセチルビフェニル(原料2)を表5のように変更し、水1.5mL、ドデシルメルカプタン73mg(0.35mmol)、37%塩酸2.3g(22mmol)を加え、反応温度を55℃に変更し、その他は合成実施例3と同様に行い、各目的化合物を得た。
各目的化合物は、1H-NMRで同定した(表6)。
合成例3Aの原料である前記式(BiN-1)で表される化合物を表7のように変更し、その他は合成例3Aと同様の条件にて合成を行い、それぞれ、目的化合物を得た。各目的化合物の構造は400MHz-1H-NMR(d-DMSO、内部標準TMS)およびLC-MSで分子量を確認することにより、同定した。
合成実施例3-1の原料である前記式(E-BiN-1)で表される化合物を表7のように変更し、その他は合成実施例3-1と同様の条件にて合成を行い、それぞれ、目的化合物を得た。各目的化合物の構造は400MHz-1H-NMR(d-DMSO、内部標準TMS)およびLC-MSで分子量を確認することにより、同定した。
合成実施例3-2の原料である前記式(E-BiN-1)で表される化合物を表7のように変更し、その他は合成実施例3-2と同様の条件にて合成を行い、それぞれ、各目的化合物を得た。各目的化合物の構造は400MHz-1H-NMR(d-DMSO、内部標準TMS)およびLC-MSで分子量を確認することにより、同定した。
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積1Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流中、合成例1で得られた化合物(XBisN-1)を32.6g(70mmol、三菱ガス化学(株)製)、40質量%ホルマリン水溶液21.0g(ホルムアルデヒドとして280mmol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)0.97mLを仕込み、常圧下、100℃で還流させながら7時間反応させた。その後、希釈溶媒としてオルソキシレン(和光純薬工業(株)製試薬特級)180.0gを反応液に加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、オルソキシレンを減圧下で留去することにより、褐色固体の樹脂(R1-XBisN-1)34.1gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積1Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流中、合成例1で得られた化合物(XBisN-1)を32.6g(70mmol、三菱ガス化学(株)製)、4-ビフェニルアルデヒド50.9g(280mmol、三菱ガス化学(株)製)、アニソール(関東化学(株)製)100mL及びシュウ酸二水和物(関東化学(株)製)10mLを仕込み、常圧下、100℃で還流させながら7時間反応させた。その後、希釈溶媒としてオルソキシレン(和光純薬工業(株)製試薬特級)180.0gを反応液に加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、有機相の溶媒および未反応の4-ビフェニルアルデヒドを減圧下で留去することにより、褐色固体の樹脂(R2-XBisN-1)34.7gを得た。
攪拌機、冷却管及びビュレットを備えた内容積500mlの容器に合成例23で得られた樹脂(R1-XBisN-1)30gと炭酸カリウム29.6g(214mmol)とを100mlジメチルホルムアミドに仕込み、酢酸-2-クロロエチル13.12g(108mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に前記結晶40g、メタノール80g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で4時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させることにより、褐色固体の樹脂(E-R1-XBisN-1)26.5gを得た。
攪拌機、冷却管及びビュレットを備えた内容積500mLの容器に上記式(R1-XBisN-1)で表される樹脂20.0g、2-イソシアナトエチルメタクリレート12.2g、トリエチルアミン1.0g、p-メトキシフェノール0.1gを100mLメチルイソブチルケトンに仕込み、80℃に加温して撹拌した状態で、24時間撹拌して反応を行った。50℃まで冷却し、反応液を純水中に滴下して析出した固形物を濾過し、乾燥させた後、褐色固体の(UaR1-XBisN-1)で表される樹脂23.6gを得た。
合成例23で得られた上記式(R1-XBisN-1)で表される樹脂の代わりに、合成例23Aで得られた上記式(E-R1-XBisN-1)を用いたこと以外は合成実施例23-1と同様に反応させ、褐色固体の(UaE-R1-XBisN-1)で表される樹脂25.0gを得た。
攪拌機、冷却管及びビュレットを備えた内容積500mLの容器に上述の樹脂(R2-XBisN-1)30gと炭酸カリウム29.6g(214mmol)とを100mLジメチルホルムアミドに仕込み、酢酸-2-クロロエチル13.12g(108mmol)を加えて、反応液を90℃で12時間撹拌して反応を行った。次に反応液を氷浴で冷却し結晶を析出させ、濾過を行って分離した。続いて攪拌機、冷却管及びビュレットを備えた内容積100mLの容器に前記結晶40g、メタノール80g、THF100g及び24%水酸化ナトリウム水溶液を仕込み、反応液を還流下で4時間撹拌して反応を行った。その後、氷浴で冷却し、反応液を濃縮し析出した固形物を濾過し、乾燥させることにより、褐色固体の樹脂(E-R2-XBisN-1)22.3gを得た。
合成例23で得られた上記式(R1-XBisN-1)の代わりに、合成例24で得られた上記式(R2-XBisN-1)で表される化合物33.2gを使用した以外は合成実施例23-1と同様に反応させ、褐色固体の(UaR2-XBisN-1)で表される樹脂40.1gを得た。
合成例23で得られた上記式(R1-XBisN-1)で表される樹脂の代わりに、合成例24Aで得られた上記式(E-R2-XBisN-1)を用いたこと以外は合成実施例23-1と同様に反応させ、褐色固体の(UaE-R2-XBisN-1)で表される樹脂29.0gを得た。
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積10Lの四つ口フラスコを準備した。この四つ口フラスコに、窒素気流中、1,5-ジメチルナフタレン1.09kg(7mol、三菱ガス化学(株)製)、40質量%ホルマリン水溶液2.1kg(ホルムアルデヒドとして28mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)0.97mLを仕込み、常圧下、100℃で還流させながら7時間反応させた。その後、希釈溶媒としてエチルベンゼン(和光純薬工業(株)製試薬特級)1.8kgを反応液に加え、静置後、下相の水相を除去した。さらに、中和及び水洗を行い、エチルベンゼン及び未反応の1,5-ジメチルナフタレンを減圧下で留去することにより、淡褐色固体のジメチルナフタレンホルムアルデヒド樹脂1.25kgを得た。得られたジメチルナフタレンホルムアルデヒドの分子量は、Mn:562、であった。
上記合成実施例1-1~24-2に記載の化合物あるいは樹脂、合成比較例1に記載のCR-1を用いて溶解度試験を行った。結果を表8に示す。
また、表8に示す組成のリソグラフィー用下層膜形成材料を各々調製した。
次に、これらのリソグラフィー用下層膜形成材料をシリコン基板上に回転塗布し、その後、240℃で60秒間、さらに400℃で120秒間ベークして、膜厚200nmの下層膜を各々作製した。酸発生剤、架橋剤及び有機溶媒については以下のものを用いた。
酸発生剤:みどり化学社製 ジターシャリーブチルジフェニルヨードニウムノナフルオロメタンスルホナート(DTDPI)
架橋剤:三和ケミカル社製 ニカラックMX270(ニカラック)
有機溶媒:プロピレングリコールモノメチルエーテルアセテートアセテート(PGMEA)
また、下記表9に示す組成のリソグラフィー用下層膜形成材料を各々調製した。次に、これらのリソグラフィー用下層膜形成材料をシリコン基板上に回転塗布し、その後、その後、110℃で60秒間ベークして塗膜の溶媒を除去した後、高圧水銀ランプにより、積算露光量600mJ/cm2、照射時間20秒で硬化させて膜厚200nmの下層膜を各々作製した。光ラジカル重合開始剤、架橋剤及び有機溶媒については次のものを用いた。
架橋剤:
(1)三和ケミカル社製 ニカラックMX270(ニカラック)
(2)三菱ガス化学製 ジアリルビスフェノールA型シアネート(DABPA-CN)
(3)小西化学工業製 ジアリルビスフェノールA(BPA-CA)
(4)小西化学工業製 ベンゾオキサジン(BF-BXZ)
(5)日本化薬製 ビフェニルアラルキル型エポキシ樹脂(NC-3000-L)
有機溶媒:プロピレングリコールモノメチルエーテルアセテートアセテート(PGMEA)
下記に示す条件でエッチング試験を行い、エッチング耐性を評価した。評価結果を表1及び表8および表9に示す。
エッチング装置:サムコインターナショナル社製 RIE-10NR
出力:50W
圧力:20Pa
時間:2min
エッチングガス
Arガス流量:CF4ガス流量:O2ガス流量=50:5:5(sccm)
まず、実施例1-1において用いる化合物(UaXBisN-1)に代えてノボラック(群栄化学社製 PSM4357)を用いること以外は、実施例1-1と同様の条件で、ノボラックの下層膜を作製した。そして、このノボラックの下層膜を対象として、上記のエッチング試験を行い、そのときのエッチングレートを測定した。
次に、実施例1-1及び比較例1の下層膜を対象として、上記エッチング試験を同様に行い、そのときのエッチングレートを測定した。そして、ノボラックの下層膜のエッチングレートを基準として、以下の評価基準でエッチング耐性を評価した。
A:ノボラックの下層膜に比べてエッチングレートが、-10%未満
B:ノボラックの下層膜に比べてエッチングレートが、-10%~+5%
C:ノボラックの下層膜に比べてエッチングレートが、+5%超
次に、UaXBisN-1、UaE-XBisN-1、UaBisF-1、又はUaE-BisF-1を含むリソグラフィー用下層膜形成材料の各溶液を膜厚300nmのSiO2基板上に塗布して、240℃で60秒間、さらに400℃で120秒間ベークすることにより、膜厚70nmの下層膜を形成した。この下層膜上に、ArF用レジスト溶液を塗布し、130℃で60秒間ベークすることにより、膜厚140nmのフォトレジスト層を形成した。なお、ArFレジスト溶液としては、下記式(11)の化合物:5質量部、トリフェニルスルホニウムノナフルオロメタンスルホナート:1質量部、トリブチルアミン:2質量部、及びPGMEA:92質量部を配合して調製したものを用いた。
下層膜の形成を行わないこと以外は、実施例45と同様にして、フォトレジスト層をSiO2基板上に直接形成し、ポジ型のレジストパターンを得た。結果を表10に示す。
また、実施例45~48では、現像後のレジストパターン形状が良好であり、欠陥も見られないことが確認された。下層膜の形成を省略した比較例2に比して、解像性及び感度ともに有意に優れていることが確認された。
さらに、現像後のレジストパターン形状の相違から、実施例45~48において用いたリソグラフィー用下層膜形成材料は、レジスト材料との密着性が良いことが示された。
実施例1-1~2-2で得られたリソグラフィー用下層膜形成材料の溶液を膜厚300nmのSiO2基板上に塗布して、240℃で60秒間、さらに400℃で120秒間ベークすることにより、膜厚80nmの下層膜を形成した。この下層膜上に、珪素含有中間層材料を塗布し、200℃で60秒間ベークすることにより、膜厚35nmの中間層膜を形成した。さらに、この中間層膜上に、上記ArF用レジスト溶液を塗布し、130℃で60秒間ベークすることにより、膜厚150nmのフォトレジスト層を形成した。なお、珪素含有中間層材料としては、特開2007-226170号公報<合成例1>に記載の珪素原子含有ポリマーを用いた。
レジストパターンのレジスト中間層膜へのエッチング条件
出力:50W
圧力:20Pa
時間:1min
エッチングガス
Arガス流量:CF4ガス流量:O2ガス流量=50:8:2(sccm)
出力:50W
圧力:20Pa
時間:2min
エッチングガス
Arガス流量:CF4ガス流量:O2ガス流量=50:5:5(sccm)
出力:50W
圧力:20Pa
時間:2min
エッチングガス
Arガス流量:C5F12ガス流量:C2F6ガス流量:O2ガス流量
=50:4:3:1(sccm)
上記のようにして得られたパターン断面(エッチング後のSiO2膜の形状)を、(株)日立製作所製電子顕微鏡(S-4800)を用いて観察したところ、本実施形態の下層膜を用いた実施例は、多層レジスト加工におけるエッチング後のSiO2膜の形状は矩形であり、欠陥も認められず良好であることが確認された。
前記合成実施例で合成した各化合物を用いて、下記表11に示す配合で光学部品形成組成物を調製した。なお、表11中の光学部品形成組成物の各成分のうち、酸発生剤、架橋剤、酸拡散抑制剤、及び溶媒については、以下のものを用いた。
酸発生剤:みどり化学社製 ジターシャリーブチルジフェニルヨードニウムノナフルオロメタンスルホナート(DTDPI)
架橋剤:三和ケミカル社製 ニカラックMX270(ニカラック)
有機溶媒:プロピレングリコールモノメチルエーテルアセテートアセテート(PGMEA)
均一状態の光学部品形成組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中でプレベーク(prebake:PB)して、厚さ1μmの光学部品形成膜を形成した。調製した光学部品形成組成物について、膜形成が良好な場合には「A」、形成した膜に欠陥がある場合には「C」と評価した。
均一な光学部品形成組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中でPBして、厚さ1μmの膜を形成した。その膜につき、ジェー・エー・ウーラム製多入射角分光エリプソメーターVASEにて、25℃における屈折率(λ=589.3nm)を測定した。調製した膜について、屈折率が1.6以上の場合には「A」、1.55以上1.6未満の場合には「B」、1.55未満の場合には「C」と評価した。また透過率(λ=632.8nm)が90%以上の場合には「A」、90%未満の場合には「C」と評価した。
前記合成実施例で合成した各化合物を用いて、下記表12に示す配合でレジスト組成物を調製した。なお、表12中のレジスト組成物の各成分のうち、ラジカル発生剤、ラジカル拡散抑制剤、及び溶媒については、以下のものを用いた。
ラジカル発生剤:BASF社製 IRGACURE184
ラジカル拡散制御剤:BASF社製 IRGACURE1010
有機溶媒:プロピレングリコールモノメチルエーテルアセテートアセテート(PGMEA)
(1)レジスト組成物の保存安定性及び薄膜形成
レジスト組成物の保存安定性は、レジスト組成物を作成後、23℃、50%RHにて3日間静置し、析出の有無を目視にて観察することにより評価した。3日間静置後のレジスト組成物において、均一溶液であり析出がない場合にはA、析出がある場合はCと評価した。また、均一状態のレジスト組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中で露光前ベーク(PB)して、厚さ40nmのレジスト膜を形成した。作成したレジスト組成物について、薄膜形成が良好な場合にはA、形成した膜に欠陥がある場合にはCと評価した。
均一なレジスト組成物を清浄なシリコンウェハー上に回転塗布した後、110℃のオーブン中で露光前ベーク(PB)して、厚さ60nmのレジスト膜を形成した。得られたレジスト膜に対して、電子線描画装置(ELS-7500、(株)エリオニクス社製)を用いて、50nm、40nm及び30nm間隔の1:1のラインアンドスペース設定の電子線を照射した。当該照射後に、レジスト膜を、それぞれ所定の温度で、90秒間加熱し、PGMEに60秒間浸漬して現像を行った。その後、レジスト膜を、超純水で30秒間洗浄、乾燥して、ネガ型のレジストパターンを形成した。形成されたレジストパターンについて、ラインアンドスペースを走査型電子顕微鏡((株)日立ハイテクノロジー製S-4800)により観察し、レジスト組成物の電子線照射による反応性を評価した。
感度は、パターンを得るために必要な単位面積当たりの最小のエネルギー量で示し、以下に従って評価した。
A:50μC/cm2未満でパターンが得られた場合
C:50μC/cm2以上でパターンが得られた場合
パターン形成は、得られたパターン形状をSEM(走査型電子顕微鏡:Scanning Electron Microscope)にて観察し、以下に従って評価した。
A:矩形なパターンが得られた場合
B:ほぼ矩形なパターンが得られた場合
C:矩形でないパターンが得られた場合
Claims (28)
- 下記式(0)で表される、化合物。
(式(0)中、RYは、水素原子、炭素数1~30のアルキル基又は炭素数6~30のアリール基であり、
RZは、炭素数1~60のN価の基又は単結合であり、
RTは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が下記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、RTの少なくとも1つは下記式(0-1)で表される基を含み、
Xは、酸素原子、硫黄原子又は無架橋であることを示し、
mは、各々独立して0~9の整数であり、ここで、mの少なくとも1つは1~9の整数であり、
Nは、1~4の整数であり、Nが2以上の整数の場合、N個の[ ]内の構造式は同一であっても異なっていてもよく、
rは、各々独立して0~2の整数である。)
(式(0-1)中、RXは、水素原子又はメチル基である。) - 前記式(0)で表される化合物が下記式(1)で表される化合物である、請求項1に記載の化合物。
(式(1)中、R0は、前記RYと同義であり、
R1は、炭素数1~60のn価の基又は単結合であり、
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは前記式(0-1)で表される基を含み、
m2及びm3は、各々独立して、0~8の整数であり、
m4及びm5は、各々独立して、0~9の整数であり、
但し、m2、m3、m4及びm5は同時に0になることはなく、
nは前記Nと同義であり、ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよく、
p2~p5は、前記rと同義である。) - 前記式(0)で表される化合物が下記式(2)で表される化合物である、請求項1に記載の化合物。
(式(2)中、R0Aは、前記RYと同義であり、
R1Aは、炭素数1~60のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは前記式(0-1)で表される基を含み、
nAは、前記Nと同義であり、ここで、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよく、
XAは、酸素原子、硫黄原子又は無架橋であることを示し、
m2Aは、各々独立して、0~7の整数であり、但し、少なくとも1つのm2Aは1~7の整数であり、
qAは、各々独立して、0又は1である。) - 前記式(1)で表される化合物が下記式(1-1)で表される化合物である、請求項2に記載の化合物。
(式(1-1)中、R0、R1、R4、R5、n、p2~p5、m4及びm5は、前記式(1)におけるものと同義であり、
R6~R7は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、
R10~R11は、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R10~R11の少なくとも1つは下記式(0-2)で表される基であり、
m6及びm7は、各々独立して、0~7の整数であり、
但し、m4、m5、m6及びm7は同時に0になることはない。)
(式(0-2)中、RXは、前記式(0-1)におけるものと同義であり、sは、0~30の整数である。) - 前記式(2)で表される化合物が下記式(2-1)で表される化合物である、請求項3に記載の化合物。
(式(2-1)中、R0A、R1A、nA、qA及びXA、は、前記式(2)におけるものと同義であり、
R3Aは、各々独立して、置換基を有していてもよい炭素数1~30の直鎖状、分岐状若しくは環状のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基であり、
R4Aは、各々独立して、水素原子又は下記式(0-2)で表される基であり、
ここで、R4Aの少なくとも1つは下記式(0-2)で表される基であり、
m6Aは、各々独立して、0~5の整数である。)
(式(0-2)中、RXは、前記式(0-1)におけるものと同義であり、sは、0~30の整数である。) - 請求項1に記載の化合物をモノマーとして得られる、樹脂。
- 下記式(3)で表される構造を有する、請求項7に記載の樹脂。
(式(3)中、Lは、置換基を有していてもよい炭素数1~30のアルキレン基、置換基を有していてもよい炭素数6~30のアリーレン基、置換基を有していてもよい炭素数1~30のアルコキシレン基又は単結合であり、前記アルキレン基、前記アリーレン基、前記アルコキシレン基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、
R0は、前記RYと同義であり、
R1は、炭素数1~60のn価の基又は単結合であり、
R2~R5は、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2~R5の少なくとも1つは前記式(0-1)で表される基を含み、
m2及びm3は、各々独立して、0~8の整数であり、
m4及びm5は、各々独立して、0~9の整数であり、
但し、m2、m3、m4及びm5は同時に0になることはなく、
nは前記Nと同義であり、ここで、nが2以上の整数の場合、n個の[ ]内の構造式は同一であっても異なっていてもよく、
p2~p5は、前記rと同義である。) - 下記式(4)で表される構造を有する、請求項7に記載の樹脂。
(式(4)中、Lは、置換基を有していてもよい炭素数1~30のアルキレン基、置換基を有していてもよい炭素数6~30のアリーレン基、置換基を有していてもよい炭素数1~30のアルコキシレン基又は単結合であり、前記アルキレン基、前記アリーレン基、前記アルコキシレン基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、
R0Aは、前記RYと同義であり、
R1Aは、炭素数1~30のnA価の基又は単結合であり、
R2Aは、各々独立して、置換基を有していてもよい炭素数1~30のアルキル基、置換基を有していてもよい炭素数6~30のアリール基、置換基を有していてもよい炭素数2~30のアルケニル基、置換基を有していてもよい炭素数1~30のアルコキシ基、ハロゲン原子、ニトロ基、アミノ基、カルボン酸基、チオール基、水酸基又は水酸基の水素原子が前記式(0-1)で表される基で置換された基であり、前記アルキル基、前記アリール基、前記アルケニル基、前記アルコキシ基は、エーテル結合、ケトン結合又はエステル結合を含んでいてもよく、ここで、R2Aの少なくとも1つは前記式(0-1)で表される基を含み、
nAは、上記Nと同義であり、ここで、nAが2以上の整数の場合、nA個の[ ]内の構造式は同一であっても異なっていてもよく、
XAは、酸素原子、硫黄原子又は無架橋であることを示し、
m2Aは、各々独立して、0~7の整数であり、但し、少なくとも1つのm2Aは1~6の整数であり、
qAは、各々独立して、0又は1である。) - 請求項1~6のいずれか一項に記載の化合物及び請求項7~9のいずれか一項に記載の樹脂からなる群より選ばれる1種以上を含有する、組成物。
- 溶媒をさらに含有する、請求項10に記載の組成物。
- 酸発生剤をさらに含有する、請求項10又は11に記載の組成物。
- 架橋剤をさらに含有する、請求項10~12のいずれか一項に記載の組成物。
- 前記架橋剤は、フェノール化合物、エポキシ化合物、シアネート化合物、アミノ化合物、ベンゾオキサジン化合物、メラミン化合物、グアナミン化合物、グリコールウリル化合物、ウレア化合物、イソシアネート化合物及びアジド化合物からなる群より選ばれる少なくとも1種である、請求項13に記載の組成物。
- 前記架橋剤は、少なくとも1つのアリル基を有する、請求項13又は14に記載の組成物。
- 前記架橋剤の含有割合が、請求項1~6のいずれか一項に記載の化合物及び請求項7~9のいずれか一項に記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.1~100質量部である、請求項13~15のいずれか一項に記載の組成物。
- 架橋促進剤をさらに含有する、請求項13~16のいずれか一項に記載の組成物。
- 前記架橋促進剤は、アミン類、イミダゾール類、有機ホスフィン類、及びルイス酸からなる群より選ばれる少なくとも1種である、請求項17に記載の組成物。
- 前記架橋促進剤の含有割合が、請求項1~6のいずれか一項に記載の化合物及び請求項7~9のいずれか一項に記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.1~5質量部である、請求項17又は18に記載の組成物。
- ラジカル重合開始剤をさらに含有する、請求項10~19のいずれか一項に記載の組成物。
- 前記ラジカル重合開始剤は、ケトン系光重合開始剤、有機過酸化物系重合開始剤及びアゾ系重合開始剤からなる群より選ばれる少なくとも1種である、請求項10~20のいずれか一項に記載の組成物。
- 前記ラジカル重合開始剤の含有割合が、請求項1~6のいずれか一項に記載の化合物及び請求項7~9のいずれか一項に記載の樹脂からなる群より選ばれる1種以上を含有する組成物の合計質量を100質量部とした場合に、0.05~25質量部である、請求項10~21のいずれか一項に記載の組成物。
- リソグラフィー用膜形成に用いられる、請求項10~22のいずれか一項に記載の組成物。
- レジスト永久膜形成に用いられる、請求項10~22のいずれか一項に記載の組成物。
- 光学部品形成に用いられる、請求項10~13のいずれか一項に記載の組成物。
- 基板上に、請求項23に記載の組成物を用いてフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像を行う工程を含む、レジストパターン形成方法。
- 基板上に、請求項23に記載の組成物を用いて下層膜を形成し、前記下層膜上に、少なくとも1層のフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像を行う工程を含む、レジストパターン形成方法。
- 基板上に、請求項23に記載の組成物を用いて下層膜を形成し、前記下層膜上に、レジスト中間層膜材料を用いて中間層膜を形成し、前記中間層膜上に、少なくとも1層のフォトレジスト層を形成した後、前記フォトレジスト層の所定の領域に放射線を照射し、現像してレジストパターンを形成し、その後、前記レジストパターンをマスクとして前記中間層膜をエッチングし、得られた中間層膜パターンをエッチングマスクとして前記下層膜をエッチングし、得られた下層膜パターンをエッチングマスクとして基板をエッチングすることにより基板にパターンを形成する工程を含む、回路パターン形成方法。
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WO2020027206A1 (ja) * | 2018-07-31 | 2020-02-06 | 三菱瓦斯化学株式会社 | 光学部品形成用組成物及び光学部品、並びに、化合物及び樹脂 |
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KR20190034149A (ko) | 2019-04-01 |
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