WO2020045024A1 - 感光性樹脂組成物、ドライフィルム、及びプリント配線板 - Google Patents
感光性樹脂組成物、ドライフィルム、及びプリント配線板 Download PDFInfo
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- WO2020045024A1 WO2020045024A1 PCT/JP2019/031306 JP2019031306W WO2020045024A1 WO 2020045024 A1 WO2020045024 A1 WO 2020045024A1 JP 2019031306 W JP2019031306 W JP 2019031306W WO 2020045024 A1 WO2020045024 A1 WO 2020045024A1
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- Prior art keywords
- resin
- group
- photosensitive resin
- composition
- resin composition
- Prior art date
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- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 6
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- 230000000052 comparative effect Effects 0.000 description 5
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 5
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- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 5
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 4
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- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 2
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- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229940083037 simethicone Drugs 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000001052 yellow pigment Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/08—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated side groups
- C08F290/14—Polymers provided for in subclass C08G
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/08—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated side groups
- C08F290/14—Polymers provided for in subclass C08G
- C08F290/144—Polymers containing more than one epoxy group per molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
-
- 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
-
- 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
-
- 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
-
- 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
- G03F7/029—Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
-
- 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
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
Definitions
- the present invention relates to a photosensitive resin composition, a dry film, and a printed wiring board, and more particularly, to a photosensitive resin that can be suitably used for forming an electrical insulating layer such as a solder resist layer on a printed wiring board.
- the present invention relates to a composition, a dry film containing the photosensitive resin composition, and a printed wiring board including a solder resist layer which is a cured product of the photosensitive resin composition.
- electric insulating resin compositions have been used to form electric insulating layers such as a solder resist layer, a plating resist layer, an etching resist layer, and an interlayer insulating layer.
- This resin composition is, for example, a photosensitive resin composition.
- the electric insulating layer can be formed by curing the film made of the photosensitive resin composition by exposure. Various light sources are used for the exposure.
- Patent Document 1 discloses a carboxyl group-containing unsaturated resin (A) including a carboxyl group-containing unsaturated resin (A1) containing at least one of a cresol novolak skeleton and a phenol novolak skeleton and a urethane bond, and a colorant (B). And a photosensitive resin composition containing a photopolymerization initiator (C), a photopolymerizable compound (D), and an epoxy compound (E).
- A carboxyl group-containing unsaturated resin
- A1 a carboxyl group-containing unsaturated resin
- A1 containing at least one of a cresol novolak skeleton and a phenol novolak skeleton and a urethane bond
- B a colorant
- a photosensitive resin composition containing a photopolymerization initiator (C), a photopolymerizable compound (D), and an epoxy compound (E).
- An object of the present invention is to provide a photosensitive resin composition capable of forming an electric insulating layer by forming a film, exposing the film, and then thermally curing the film, and sufficiently curing the film to a deep portion of the film. It is to provide a photosensitive resin composition which can be used.
- the photosensitive resin composition includes a carboxyl group-containing unsaturated resin (A), a colorant (B), a photopolymerization initiator (C), a photopolymerizable compound (D), and an epoxy compound (E). ) And at least one of melamine and a melamine derivative (F).
- the carboxyl group-containing unsaturated resin (A) has at least one of a cresol novolak skeleton and a phenol novolak skeleton, a part of a carboxyl group in a resin (A11) having a carboxyl group and an ethylenically unsaturated group, and an epoxy group.
- the resin (A1) having a structure obtained by reacting with an epoxy group in the unsaturated group-containing monomer (A12).
- the resin (A1) has no urethane bond.
- the colorant (B) includes a black colorant (B1).
- the photopolymerization initiator (C) includes an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction type photopolymerization initiator (C2).
- a dry film according to one embodiment of the present invention contains the photosensitive resin composition.
- a printed wiring board includes a solder resist layer containing a cured product of the photosensitive resin composition.
- a photosensitive resin composition is used to form an electric insulating layer such as a solder resist layer, a plating resist layer, an etching resist layer, and an interlayer insulating layer.
- the electric insulating layer can be formed by curing the film made of the photosensitive resin composition by exposure. Various light sources are used for the exposure.
- a photosensitive resin composition described in Patent Document 1 is a carboxyl group-containing unsaturated resin containing at least one of a cresol novolak skeleton and a phenol novolak skeleton and a urethane bond. It contains a carboxyl group-containing unsaturated resin (A) containing (A1), a colorant (B), a photopolymerization initiator (C), a photopolymerizable compound (D), and an epoxy compound (E). ing.
- the present inventors have found that a photosensitive film that can form an electric insulating layer by forming a film, exposing the film, and then thermally curing the film, and realizing sufficient curing to a deep portion of the film.
- the present inventors have found a combination of conductive resin compositions and have reached the present invention.
- (meth) acryl means at least one of “acryl” and “methacryl”.
- (meth) acrylate means at least one of acrylate and methacrylate.
- composition (X) includes a carboxyl group-containing unsaturated resin (A), a coloring agent (B), a photopolymerization initiator (C), and a photopolymerizable compound. (D), at least one of an epoxy compound (E) and melamine and a melamine derivative (F).
- the carboxyl group-containing unsaturated resin (A) has at least one of a cresol novolak skeleton and a phenol novolak skeleton, a part of the carboxyl group in the resin (A11) having a carboxyl group and an ethylenically unsaturated group, and an epoxy group.
- the resin (A1) includes a resin (A1) having a structure obtained by reacting with an epoxy group in an unsaturated group-containing monomer (A12).
- the resin (A1) has no urethane bond.
- the coloring agent (B) includes a black coloring agent (B1).
- the photopolymerization initiator (C) includes an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction type photopolymerization initiator (C2).
- the composition (X) has such a constitution, when the film formed from the composition (X) is exposed, the film can be sufficiently cured to a deep part.
- the resin (A1) contained in the carboxyl group-containing unsaturated resin (A) has an unsaturated bond derived from the resin (A11) and an unsaturated bond derived from the unsaturated group-containing monomer (A12).
- the proportion of unsaturated bonds in the carboxyl group-containing unsaturated resin (A) can be increased. Therefore, the film formed from the composition (X) can have good curability. This makes it easy to cure the film formed from the composition (X) to a deep part.
- the photopolymerization initiator (C) contains an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction-type photopolymerization initiator (C2) to form a film formed from the composition (X). It becomes easier to cure deeper.
- composition (X) Each component contained in the composition (X) will be described.
- the carboxyl group-containing unsaturated resin (A) has at least one of a cresol novolak skeleton and a phenol novolak skeleton, a part of the carboxyl group in the resin (A11) having a carboxyl group and an ethylenically unsaturated group, and an epoxy group. It includes a resin (A1) having a structure obtained by reacting with an epoxy group in an unsaturated group-containing monomer (A12).
- the resin (A11) is obtained by adding a polybasic acid anhydride (a2) to a secondary hydroxyl group in the resin (a1) having at least one of a cresol novolak skeleton and a phenol novolak skeleton, an ethylenically unsaturated group and a secondary hydroxyl group. It is preferable to include a resin (A11-1) having a reacted structure.
- the resin (a1) has a structure in which an epoxy group in the compound (a11) having at least one of a cresol novolak skeleton and a phenol novolak skeleton and an epoxy group has reacted with a carboxyl group in the unsaturated group-containing carboxylic acid (a12). Is preferred.
- the resin (a1) preferably has a secondary hydroxyl group generated by this reaction.
- the epoxy resin in the compound (a11) having at least one of the cresol novolak skeleton and the phenol novolak skeleton and the epoxy group reacts with the carboxyl group in the unsaturated group-containing carboxylic acid (a12) to form a resin.
- (A1) is synthesized.
- the resin (a1) has at least one of a cresol novolak skeleton and a phenol novolak skeleton, an ethylenically unsaturated group, and a secondary hydroxyl group.
- the secondary hydroxyl group in the resin (a1) is reacted with the polybasic acid anhydride (a2) to synthesize the carboxyl group-containing unsaturated resin (A11) containing the resin (A11-1). Then, the carboxyl group-containing unsaturated resin (A) containing the resin (A1) is reacted by reacting the carboxyl group-containing unsaturated resin (A11) with the unsaturated group-containing monomer (A12) having an epoxy group. Obtainable.
- Compound (a11) has at least one of a cresol novolak skeleton and a phenol novolak skeleton and an epoxy group.
- the compound (a11) has, for example, a structure represented by the following formula (1).
- X in the formula (1) is a methylene group, and R is hydrogen or an alkyl group.
- the resin having a cresol novolak structure has, for example, a structure in which R in the formula (1) is a methyl group.
- the resin having a phenol novolak structure has, for example, a structure in which R in the formula (1) is hydrogen. Note that n in the expression (1) is 0 or a positive number.
- examples of the phenol novolak-type epoxy resin include product numbers EPICLON @ N-775, EPICLON @ N-770, EPICLON @ N-740, and EPICLON @ N-730- manufactured by DIC Corporation. S; includes part number YDPN-638 manufactured by Nippon Steel & Sumikin Chemical Co., Ltd .; and part numbers jERj152 and jER 154 manufactured by Mitsubishi Chemical Corporation.
- cresol novolak type epoxy resin examples include product numbers EPICLON @ N-695, EPICLON @ N-690, EPICLON @ N-680, EPICLON @ N-673, and EPICLON manufactured by DIC Corporation.
- N-670 EPICLON N-665, EPICLON N-665-LE, EPICLON N-660, EPICLON N-660-LE, EPICLON N-662-EXP-S, EPICLON N-665-EXP, EPICLON N-665-EXP -S, EPICLON N-670-EXP-S, EPICLON N-672-EXP, EPICLON N-680-EXP-S, EPICLON N-673-70M, EPI LON @ N-673-80M, EPICLON @ N-680-75M, EPICLON @ N-690-70M, and EPICLON @ N-690-75M; and part numbers YDCN-700-2, YDCN-700-3, manufactured by NSSMC YDCN-700-5, YDCN-700-7, YDCN-700-10, YDCN-704, and YDCN-704A.
- Examples of the unsaturated group-containing carboxylic acid (a12) include a carboxylic acid having only one ethylenically unsaturated group in one molecule and a carboxylic acid having a plurality of ethylenically unsaturated groups in one molecule.
- carboxylic acids having only one ethylenically unsaturated group in one molecule include acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, 2-acryloyloxyethyl succinic acid, 2-methacryloyloxyethyl succinic acid, Acryloyloxyethyl phthalic acid, 2-methacryloyloxyethyl phthalic acid, ⁇ -carboxyethyl acrylate, acryloyloxyethyl succinate, methacryloyloxyethyl succinate, 2-propenoic acid, 3- (2-carboxyethoxy) -3- Oxypropyl ester, 2-acryloyloxyethyl tetrahydrophthalic acid, 2-methacryloyloxyethyl tetrahydrophthalic acid, 2-acryloyloxyethyl hexahydrophthalic acid, 2-methacryloyloxyethyl
- Examples of carboxylic acids having a plurality of ethylenically unsaturated groups in one molecule include compounds obtained by reacting a difunctional acid anhydride with a polyfunctional acrylate having a hydroxyl group, and bifunctional methacrylates having a hydroxyl group. Includes compounds obtained by reacting basic acid anhydrides. More specifically, examples of the compound having a plurality of ethylenically unsaturated groups include pentaerythritol triacrylate, pentaerythritol trimethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol.
- the unsaturated group-containing carboxylic acid (a12) can contain one or more of these components.
- the unsaturated group-containing carboxylic acid (a12) preferably contains one or more components selected from the group consisting of acrylic acid and methacrylic acid. In this case, sticking of the wet coating film formed from the photosensitive resin composition is sufficiently suppressed, and the plating resistance and solder heat resistance of the electric insulating layer (for example, the solder resist layer) are improved.
- polybasic anhydride (a2) examples include methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, nadic anhydride, 3,6-endomethylenetetrahydrophthalic anhydride, Alicyclic dibasic anhydrides such as methylendmethylenetetrahydrophthalic anhydride and tetrabromophthalic anhydride; succinic anhydride, maleic anhydride, itaconic anhydride, octenyl succinic anhydride, pentadodecenyl succinic anhydride, phthalic anhydride, and anhydride Aliphatic or aromatic dibasic acid anhydrides such as trimellitic acid, biphenyltetracarboxylic dianhydride, diphenylethertetracarboxylic dianhydride, butanetetracarboxylic dianhydride
- the resin (a1) having at least one of a cresol novolak skeleton and a phenol novolak skeleton, an ethylenically unsaturated group and a secondary hydroxyl group can be synthesized, for example, by a reaction represented by the following formula (2). Specifically, the resin (a1) is synthesized by reacting the epoxy group in the compound (a11) with the carboxyl group in the unsaturated group-containing carboxylic acid (a12).
- the resin (a1) has a structure represented by the following formula (3).
- the resin (a1) may contain an unreacted epoxy group derived from the compound (a11).
- the resin (a1) may not contain an unreacted epoxy group.
- the resin (a1) contains a secondary hydroxyl group in a side chain in the structure represented by the following formula (3).
- the addition reaction represented by the formula (2) is preferably performed in a solvent in the presence of a polymerization inhibitor and a catalyst (a31).
- A represents an unsaturated group-containing carboxylic acid residue.
- the resin (A11-1) is obtained by reacting an epoxy group of the compound (a11) with a carboxyl group of the unsaturated group-containing carboxylic acid (a12) to obtain a polybasic acid anhydride. It can be synthesized by reacting (a2). That is, the resin (A11-1) can be synthesized by reacting the secondary hydroxyl group of the resin (a1) with the polybasic anhydride (a2).
- the reaction between the resin (a1) and the polybasic acid anhydride (a2) is represented, for example, by the following formula (4). Specifically, an esterification reaction occurs between the secondary hydroxyl group of the resin (a1) and the polybasic acid anhydride (a2) to generate a structure (S5) represented by the following formula (5).
- This structure (S5) contains a carboxyl group in the side chain. In this case, the side chain of the resin (a1) contains a carboxyl group.
- the polybasic acid anhydride (a2) is not an epoxy group at the time of the reaction between the resin (a1) and the polybasic anhydride (a2). Reacts preferentially with secondary hydroxyl groups. That is, when a secondary hydroxyl group and an epoxy group coexist, the polybasic acid anhydride (a2) hardly reacts with the epoxy group and reacts very easily with the secondary hydroxyl group.
- the esterification reaction between the intermediate and the polybasic acid anhydride (a2) is preferably performed in a solvent in the presence of a polymerization inhibitor and a catalyst (a32).
- A represents an unsaturated group-containing carboxylic acid residue
- B represents a polybasic acid anhydride residue.
- the polybasic acid anhydride (a2) is an acid dianhydride
- the polybasic acid anhydride reacts with two hydroxyl groups to form a crosslinked structure and generate two carboxyl groups. .
- the solvent used in the esterification reaction between the resin (a1) and the polybasic acid anhydride (a2) may be the same as the solvent used in the synthesis of the resin (a1).
- the solvent include aromatic hydrocarbons such as toluene, xylene, and tetramethylbenzene; ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, and propylene.
- Glycol ethers such as glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol diethyl ether, and triethylene glycol monoethyl ether; and ethyl acetate, butyl acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol mono Ethyl ether acetate Diethylene glycol monobutyl ether acetate, containing acetic acid esters such as propylene glycol monomethyl ether acetate.
- One of these solvents may be used alone, or two or more of them may be used in combination.
- the polymerization inhibitor used in the esterification reaction between the resin (a1) and the polybasic acid anhydride (a2) may be the same as the polymerization inhibitor used in the synthesis of the resin (a1).
- Examples of polymerization inhibitors include hydroquinone, methylhydroquinone, hydroquinone monomethyl ether, catechol, pyrogallol, and phenothiazine. One of these polymerization inhibitors may be used alone, or two or more thereof may be used in combination.
- the catalyst (a32) may be the same as the catalyst (a31).
- Examples of catalysts that can be used as the catalyst (a31) and the catalyst (a32) include a tertiary amine such as triethylamine, a quaternary ammonium salt such as triethylbenzylammonium chloride, an imidazole compound such as 2-ethyl-4-methylimidazole, and a triamine.
- phosphorus compounds such as phenylphosphine.
- these catalysts only one kind may be used, or two or more kinds may be used in combination.
- the amount of the unsaturated group-containing carboxylic acid (a12) relative to 1 mol of the epoxy group of the compound (a11) is from 0.8 mol to 1.2 mol. It is preferably in the following range, and more preferably in the range of 0.9 mol or more and 1.1 mol or less.
- the amount of the polybasic acid anhydride (a2) per 0.2 mol of the epoxy group of the compound (a11) is 0.2 mol or more and 0.8 mol or less.
- the amount of the unsaturated group-containing carboxylic acid (a12) is in the range of 0.8 mol to 1.2 mol with respect to 1 mol of the epoxy group of the compound (a11), and the amount of the polybasic anhydride (a2) Is preferably in the range of 0.2 mol or more and 0.8 mol or less. Further, the amount of the unsaturated group-containing carboxylic acid (a12) is in the range of 0.9 mol or more and 1.1 mol or less with respect to 1 mol of the epoxy group of the compound (a11), and the amount of the polybasic anhydride (a2) is 0 mol. More preferably, it is in the range of 0.3 mol or more and 0.7 mol or less. In this case, both the improvement of the exposure sensitivity of the composition (X) and the securing of the developing property can be achieved.
- the resin (A1) is synthesized by reacting the carboxyl group in the resin (A11) with the epoxy group in the unsaturated group-containing monomer (A12) having an epoxy group.
- the carboxyl group-containing unsaturated resin (A11) preferably contains the above-mentioned resin (A11-1).
- the carboxyl group-containing unsaturated resin (A11) contains the resin (A11-1)
- the epoxy group in the unsaturated group-containing monomer (A12) is reacted with the carboxyl group in the resin (A11-1).
- the unsaturated group-containing monomer (A12) is a compound containing at least one epoxy group and one unsaturated group in one molecule. Specifically, the unsaturated group-containing monomer (A12) has a structure represented by the following formula (6).
- Y represents an unsaturated group-containing monomer residue.
- the unsaturated group-containing monomer (A12) examples include epoxycyclohexyl derivatives of acrylic acid, epoxycyclohexyl derivatives of methacrylic acid, alicyclic epoxy derivatives of acrylate, alicyclic epoxy derivatives of methacrylate, ⁇ -methylglycidyl acrylate, And at least one compound selected from the group consisting of ⁇ -methylglycidyl methacrylate.
- the unsaturated group-containing monomer (A12) preferably contains glycidyl (meth) acrylate, which is widely used and easily available.
- the reaction between the carboxyl group-containing unsaturated resin (A11) and the unsaturated group-containing monomer (A12) is represented, for example, by the following formula (7). Specifically, the esterification reaction occurs between the carboxyl group in the carboxyl group-containing unsaturated resin (A11) and the epoxy group in the unsaturated group-containing monomer (A12), and the structure represented by the following formula (8) (S8) is generated.
- This structure (S8) has an unsaturated group in A, which is an unsaturated group-containing carboxylic acid residue, and has an unsaturated group in Y, which is an unsaturated group-containing monomer residue.
- the resin (A1) contains at least two unsaturated groups in the structure (S8). Therefore, the UV sensitivity of the composition (X) can be increased, and the composition (X) can be sufficiently cured to a deep portion of a film formed from the composition (X). Further, the structure (S5) represented by the formula (5) contains a carboxyl group in the side chain, but the esterification reaction represented by the formula (7) causes the structure (S8) to contain no carboxyl group in the side chain. . Therefore, when a film formed from the composition (X) containing the resin (A1) is developed after exposure, the developer resistance can be improved. Therefore, when an electric insulating layer such as a solder resist layer is formed using the composition (X), a desired pattern can be favorably formed on the electric insulating layer.
- an electric insulating layer such as a solder resist layer
- Resin (A1) has no urethane bond. That is, the structure (S8) represented by the formula (8) has no urethane bond.
- the resin (A1) does not have a urethane bond
- the cured product of the composition (X) can have good insulating properties. Therefore, an electrical insulating layer having excellent electrical reliability can be formed using the composition (X).
- the reaction represented by the formula (7) does not include the generation of a urethane bond. The reaction including the formation of a urethane bond is performed in the presence of a tin-based catalyst.
- the amount of the tin-based catalyst is preferably small, and it is also preferable not to use the tin-based catalyst. Since the reaction represented by the formula (7) does not include the formation of urethane bonds, the reaction can be performed without using a tin-based catalyst.
- the amount of the unsaturated group-containing monomer (A12) is based on 1 mol of the epoxy group in the compound (a11). On the other hand, it is preferably in the range of 0.01 mol or more and 0.2 mol or less, more preferably in the range of 0.02 mol or more and 0.15 mol or less, and in the range of 0.03 mol or more and 0.12 mol or less. It is more preferred that there be.
- the composition (X) can be sufficiently cured to a deep portion of a film formed from the composition (X) while maintaining good alkali developability.
- the carboxyl group-containing unsaturated resin (A11) contains the resin (A11-1)
- the resin (A1) has an ethylenically unsaturated group derived from the unsaturated group-containing carboxylic acid (a2), so that the photoreaction occurs. Has the property. Therefore, the carboxyl group-containing unsaturated resin (A) containing the resin (A1) can impart photosensitivity to the composition (X), specifically, ultraviolet curability.
- the carboxyl group-containing unsaturated resin (A) can give the composition (X) developability with an alkaline aqueous solution.
- the weight average molecular weight of the resin (A1) is preferably in the range of 4,000 to 50,000. When the weight average molecular weight is within this range, when the composition (X) is cured to form an electric insulating layer, the composition (X) can be sufficiently cured to a deep portion of a film formed from the composition (X). Further, when the weight-average molecular weight is within this range, the developing solution resistance when the film formed from the composition (X) is developed after exposure can be improved. Therefore, when an electrical insulating layer is manufactured using the composition (X), a desired pattern can be favorably formed on the electrical insulating layer.
- the weight average molecular weight of the resin (A1) is more preferably 7000 or more and 45,000 or less, further preferably 9000 or more and 40000 or less, and particularly preferably 10,000 or more and 30000 or less.
- the weight average molecular weight (Mw) of the resin (A1) is calculated from the result of molecular weight measurement by gel permeation chromatography.
- the molecular weight measurement by gel permeation chromatography can be performed, for example, under the following conditions.
- GPC device SHOdex SYSTEM 11, manufactured by Showa Denko KK Column: SHOdex KF-800P, KF-005, KF-003, KF-001 Four series, Mobile phase: THF, Flow rate: 1 ml / min, Column temperature: 45 ° C, Detector: RI, Conversion: polystyrene.
- the acid value of the resin (A1) is preferably in the range of 35 mgKOH / g to 120 mgKOH / g. When the acid value of the resin (A1) is within this range, when the composition (X) is cured to form an electric insulating layer, the resin (A1) is sufficiently cured to a deep portion of a film formed from the composition (X). Can be done.
- the acid value of the resin (A1) is more preferably in the range of 45 mgKOH / g to 110 mgKOH / g, and further preferably in the range of 55 mgKOH / g to 85 mgKOH / g.
- the amount of the unsaturated group-containing monomer (A12) is determined by the amount of the carboxyl group. It is preferably 0.01 mol or more and 0.67 mol or less based on 1 mol of the carboxyl group in the unsaturated resin (A11). In this case, by increasing the ratio of the unsaturated bond in the resin (A1), the curability can be improved and good developer resistance can be obtained. Therefore, a film formed from the composition (X) containing the resin (A1) can be sufficiently cured to a deep portion and can have good developability.
- the amount of the unsaturated group-containing monomer (A12) is more preferably from 0.03 mol to 0.4 mol, and more preferably from 0.05 mol to 1 mol of the carboxyl group in the carboxyl group-containing unsaturated resin (A11). It is more preferably at least 0.3 mol and at most 0.3 mol, particularly preferably at least 0.1 mol and at most 0.2 mol.
- the carboxyl group-containing unsaturated resin (A) may contain only the resin (A1) or may contain a carboxyl group-containing unsaturated resin other than the resin (A1).
- the carboxyl group-containing unsaturated resin other than the resin (A1) may be a known compound used in a photosensitive solder resist composition or the like.
- the content ratio of the carboxyl group-containing unsaturated resin (A) to the solid content of the composition (X) is, for example, in a range of 20% by mass or more and 60% by mass or less, and in a range of 25% by mass or more and 50% by mass or less. More preferably, there is.
- the solid content here refers to the total amount of all components excluding components such as a solvent that evaporates in the process of forming a film from the photosensitive resin composition.
- the content ratio of the resin (A1) with respect to the entire carboxyl group-containing unsaturated resin (A) is preferably at least 20% by mass, more preferably at least 40% by mass, further preferably at least 60% by mass, particularly preferably at least 60% by mass. It is preferably at least 80% by mass.
- the upper limit of the content of the carboxyl group-containing unsaturated resin (A1) relative to the entire carboxyl group-containing unsaturated resin (A) is not particularly limited, but is, for example, 100% by mass or less. In this case, when the composition (X) is cured to form an electrical insulating layer, it can be sufficiently cured to a deep portion of a film formed from the composition (X).
- the composition (X) contains a coloring agent (B).
- the coloring agent (B) can impart a color to the electric insulating layer made from the composition (X).
- the colorant (B) can include at least one of a pigment and a dye.
- the pigment can include at least one of an inorganic powder and an organometallic powder.
- the pigment may be dispersed in the resin composition.
- the dye may be an organic compound. The dye may be soluble in the resin composition.
- the colorant (B) contains the black colorant (B1).
- the coloring agent (B) contains the black coloring agent (B1)
- the electrical insulating layer produced by curing the composition (X) can have excellent concealing properties. Furthermore, since the composition (X) has excellent photosensitivity, even when the composition (X) contains the black colorant (B1), the film formed from the composition (X) is exposed when exposed to light. It can be cured sufficiently to the deep part.
- the black colorant (B1) contains at least one component selected from the group consisting of carbon black, naphthalene black, titanium black, aniline black, lactam black, iron oxide black, chromium oxide black, and perylene black colorant. be able to.
- the perylene black colorant may include, for example, at least one component selected from the group consisting of color index (CI) pigment black 31 and color index (CI) pigment black 32. it can.
- the perylene black colorant has no color index number other than the above-mentioned components, but among Lumin Black Black FK 4280 and Lumogen Black FK 4281 of BASF, which is known as a perylene-based near infrared transmitting black colorant. , At least one of them.
- the black colorant (B1) preferably contains carbon black.
- the electrical insulating layer made from the composition (X) may have better hiding properties.
- the content of the black colorant (B1) is preferably in the range of 0.01% by mass or more and 20% by mass or less, and more preferably 0.05% by mass or more and 15% by mass or less with respect to the carboxyl group-containing unsaturated resin (A). It is more preferably in the range of not more than 1% by mass, more preferably in the range of not less than 1% by mass and not more than 10% by mass.
- the colorant (B) can include a colorant (B2) different from the black colorant (B1).
- the colorant (B2) is at least selected from the group consisting of a blue colorant, a yellow colorant, a red colorant, a green colorant, a purple colorant, an orange colorant, a brown colorant, and a white colorant.
- a blue colorant a yellow colorant
- a red colorant a green colorant
- a purple colorant an orange colorant
- a brown colorant a white colorant.
- blue colorants include phthalocyanine blue colorants and anthraquinone blue colorants.
- examples of the phthalocyanine blue colorant include metal-substituted or unsubstituted phthalocyanine compounds.
- the blue colorant may be a pigment.
- yellow colorants examples include monoazo yellow colorants, disazo yellow colorants, condensed azo yellow colorants, benzimidazolone yellow colorants, isoindolinone yellow colorants, and anthraquinone yellow colorants.
- the yellow colorant may be a dye.
- yellow colorant examples include Pigment Yellow 1, 2, 3, 4, 5, 6, 9, 9, 10, 12, 61, 62, 62: 1, 65, 73, 74, 75, 97, 100, 104, 105, 111, 116, 167, 168, 169, 182, and 183; and Pigment Yellow 12, 13, 13, 14, 16, 17, 55, 63, 81, 83, 87, 126, 127, 152, 170 172, 174, 176, 188, and 198 may be further included.
- green colorants examples include phthalocyanine-based green colorants, anthraquinone-based green colorants, perylene-based green colorants, and metal-substituted or unsubstituted phthalocyanine compounds.
- Specific examples of the green colorant include a colorant represented by Pigment Green 7; and a colorant represented by Pigment Green 36.
- red colorants examples include monoazo red colorant, disazo red colorant, azo lake red colorant, benzimidazolone red colorant, perylene red colorant, diketopyrrolopyrrole red colorant, condensed azo Red colorant, anthraquinone red colorant, and quinacridone type.
- red colorants include Pigment Red 1, 2, 3, 4, 5, 6, 8, 9, 12, 12, 14, 15, 16, 17, 21, 21, 22, 23, 31, 32, 112, 114, 146, 147, 151, 170, 184, 187, 188, 193, 210, 245, 253, 258, 266, 267, 268, and 269; Pigment Red 37, 38, and 41; Pigment Red 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 49: 2, 50: 1, 52: 1, 52: 2, 53: 1, 53: 2, 57: 1, 58: 4, 63: 1, Pigment Red 171; Pigment Red 175; Pigment Red 176; Pigment Red 185; Pigment Red 208; Pigment Red 123; Pigment Red 149; Pigment Red 166; Pigment Red 178; Pigment Red 179; 63: 2, 64: 1, 68, and 68; Pigment Red 190; Pigment Red 194; Pigment Red 224; Pigment Red 254; Pigment Red 255; Pigment Red 264; Pigment Red 270; Pigment
- anthraquinone-based red colorant examples include Color Index (CI) Pigment Red 83, Color Index (CI) Pigment Red 168, Color Index (CI) Pigment Red 177, and Color Index (C). .I.) Pigment Red 216.
- Anthraquinone red coloring agents are excellent in dispersibility and weather resistance.
- the white colorant is, for example, titanium oxide.
- the white colorant is titanium oxide
- the electrical insulating layer made from the composition (X) can have good hiding properties.
- a white inorganic material other than titanium oxide is not regarded as a white colorant or a colorant (B2).
- the coloring agent (B2) is preferably a coloring agent that can impart concealing properties to the electric insulating layer.
- the colorant (B2) can include, for example, at least two components selected from the group of a blue colorant, a yellow colorant, and a red colorant.
- the coloring agent (B) further contains the coloring agent (B2), even if the content of the black coloring agent (B1) in the composition (X), particularly the content of carbon black as the black coloring agent (B1) is reduced. In addition, good concealing properties can be imparted to the electric insulating layer.
- the colorant (B2) may further include at least one selected from the group consisting of a green colorant, a purple colorant, an orange colorant, a brown colorant, and a white colorant.
- the surface of the layer made of the cured product has an L * value of 30 or less, an a * value of ⁇ 5 or more and +5 or less, and It is preferable that the b * value is ⁇ 5 or more and +5 or less.
- the L * value, a * value, and b * value are values according to the L * a * b * color system.
- the electrical insulating layer produced by curing the composition (X) can have high concealing properties by increasing blackness.
- the electric insulating layer is formed on the printed wiring board, the electric insulating layer can also cover the wiring of the printed wiring board.
- the L * value, a * value, and b * value of the surface of the layer made of the cured product of the composition (X) are adjusted by adjusting the content of the black colorant (B1) contained in the composition (X) and the black color. It can be carried out by appropriately adjusting the type and content of the coloring agent other than the coloring agent (B1).
- the composition (X) contains a photopolymerization initiator (C).
- the photopolymerization initiator (C) includes an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction type photopolymerization initiator (C2).
- the film formed from the composition (X) has a deep portion. Can be cured sufficiently. Further, the electrical insulating layer produced by curing the composition (X) can have excellent insulating properties.
- composition (X) contains the carboxyl group-containing unsaturated resin (A) containing the resin (A1), and the acylphosphine oxide-based photopolymerization initiator (C1) and the hydrogen abstraction type photopolymerization initiator (C2) ),
- the curability of the composition (X) can be further enhanced, and the film formed from the composition (X) can be sufficiently cured to a deep part.
- acylphosphine oxide-based photopolymerization initiator (C1) examples include mono- and mono-monomers such as 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide and 2,4,6-trimethylbenzoyl-ethyl-phenyl-phosphinate.
- Acylphosphine oxide-based photopolymerization initiator and bis- (2,6-dichlorobenzoyl) phenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -2,5-dimethylphenylphosphine oxide, bis- ( 2,6-dichlorobenzoyl) -4-propylphenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -1-naphthylphosphine oxide, bis- (2,6-dimethoxybenzoyl) phenylphosphine oxide, bis -(2,6-dimethoxybe Zoyl) -2,4,4-trimethylpentylphosphine oxide, bis- (2,6-dimethoxybenzoyl) -2,5-dimethylphenylphosphine oxide, bis- (2,4,6-trimethylbenzoyl) phenylphosphine It includes a fin
- the acylphosphine oxide-based photopolymerization initiator (C1) comprises at least one of 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide and bis- (2,4,6-trimethylbenzoyl) phenylphosphine oxide. It is preferred to include.
- the acylphosphine oxide-based photopolymerization initiator (C1) particularly preferably contains 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide. In this case, the curability of the composition (X) can be further increased.
- Examples of the hydrogen abstraction type photopolymerization initiator (C2) include benzophenone, p-methylbenzophenone, p-chlorobenzophenone, tetrachlorobenzophenone, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, 4-benzoyl-4 ′-.
- Aryl ketone photopolymerization initiators such as methyl-diphenyl sulfide, 2-isopropylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2,4 dichlorothioxanthone, and acetophenone; 4,4 ′ -bis (diethylamino ) Dialkylamino aryl ketone initiators such as benzophenone, 4,4'-bis (dimethylamino) benzophenone, isoamyl p-dimethylaminobenzoate and p-dimethylaminoacetophenone; Including emissions system, and polycyclic carbonyl-based initiators that halogen-substituted systems.
- the hydrogen abstraction type photopolymerization initiator (C2) preferably contains an aryl ketone-based photopolymerization initiator. It is particularly preferable that the hydrogen abstraction type photopolymerization initiator (C2) contains 2,4-diethylthioxanthone. In this case, the curability of the composition (X) can be further increased.
- the photopolymerization initiator (C) may further include a photopolymerization initiator (C3) other than the acylphosphine oxide-based photopolymerization initiator (C1) and the hydrogen abstraction type photopolymerization initiator (C2).
- Examples of the photopolymerization initiator (C3) include an ⁇ -aminoalkylphenone-based photopolymerization initiator, an ⁇ -hydroxyalkylphenone-based photopolymerization initiator, and an oxime ester-based photopolymerization initiator.
- Examples of ⁇ -aminoalkylphenone-based photopolymerization initiators include 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one and 2-benzyl-2-dimethylamino-1- (4 -Morpholinophenyl) -butanone-1, and 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone.
- Examples of the ⁇ -hydroxyalkylphenone-based photopolymerization initiator include 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, 1- [4- (2- Hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one and 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] Includes phenyl ⁇ -2-methyl-propan-1-one.
- Examples of the oxime ester-based photopolymerization initiator include ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (0-acetyloxime) and Includes 2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime).
- the content ratio of the photopolymerization initiator (C) is preferably in the range of 0.5% by mass or more and 30% by mass or less based on the carboxyl group-containing unsaturated resin (A). In this case, since the composition (X) has excellent curability, a film formed from the composition (X) can be sufficiently cured to a deep part.
- the content ratio of the photopolymerization initiator (C) is more preferably in the range of 1% by mass or more and 25% by mass or less, and more preferably 5% by mass or more and 20% by mass based on the carboxyl group-containing unsaturated resin (A). More preferably, it is within the following range.
- the content of the acylphosphine oxide-based photopolymerization initiator (C1) is preferably in the range of 20% by mass or more and 99.99% by mass or less based on the photopolymerization initiator (C). In this case, since the composition (X) has excellent curability, a film formed from the composition (X) can be sufficiently cured to a deep part.
- the content ratio of the acylphosphine oxide-based photopolymerization initiator (C1) is more preferably in the range of 50% by mass or more and 99.95% by mass or less with respect to the photopolymerization initiator (C), and is preferably 90% by mass. % Is more preferably in the range of not less than 99.9% by mass.
- the content of the hydrogen abstraction type photopolymerization initiator (C2) is preferably in the range of 0.01% by mass or more and 40% by mass or less based on the acylphosphine oxide-based photopolymerization initiator (C1). In this case, since the composition (X) has excellent curability, a film formed from the composition (X) can be sufficiently cured to a deep part.
- the content of the hydrogen abstraction type photopolymerization initiator (C2) is more preferably in the range of 0.05% by mass or more and 10% by mass or less based on the acylphosphine oxide-based photopolymerization initiator (C1). , And more preferably 0.1 to 4.9% by mass.
- the content of the photopolymerization initiator (C3) is 79% by mass or less based on the photopolymerization initiator (C). Is preferably 49% by mass or less, and more preferably 9% by mass or less.
- the lower limit of the content of the photopolymerization initiator (C3) is not particularly limited, and the photopolymerization initiator (C) may not contain the photopolymerization initiator (C3). That is, the photopolymerization initiator (C) may contain only the acylphosphine oxide-based photopolymerization initiator (C1) and the hydrogen abstraction type photopolymerization initiator (C2).
- the composition (X) contains the photopolymerizable compound (D).
- the photopolymerizable compound (D) is a compound containing at least one ethylenically unsaturated group in one molecule.
- Examples of the photopolymerizable compound (D) include, for example, monofunctional (meth) acrylates such as 2-hydroxyethyl (meth) acrylate; diethylene glycol di (meth) acrylate, trimethylolpropane di (meth) acrylate, and trimethylolpropane triacrylate.
- (Meth) acrylate pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ⁇ -caprolactone-modified pentaerythrol hexaacrylate, etc. Contains polyfunctional (meth) acrylate.
- the photopolymerizable compound (D) preferably contains a hexafunctional compound, that is, a compound having six unsaturated bonds in one molecule.
- a hexafunctional compound that is, a compound having six unsaturated bonds in one molecule.
- the hexafunctional compound can contain, for example, at least one compound selected from the group consisting of dipentaerythritol hexa (meth) acrylate and ⁇ -caprolactone-modified pentaerythritol hexaacrylate.
- the photopolymerizable compound (D) may contain a trifunctional compound, that is, a compound having three unsaturated bonds in one molecule.
- a trifunctional compound that is, a compound having three unsaturated bonds in one molecule.
- Trifunctional compounds include, for example, trimethylolpropane tri (meth) acrylate, EO modified trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethoxylated isocyanuric acid tri (meth) acrylate and ⁇ -caprolactone modified It can contain at least one compound selected from the group consisting of tris- (2-acryloxyethyl) isocyanurate and ethoxylated glycerin tri (meth) acrylate.
- the photopolymerizable compound (D) may contain a phosphorus-containing compound (a phosphorus-containing unsaturated compound).
- a phosphorus-containing unsaturated compound examples include 2-methacryloyloxyethyl acid phosphate (specific examples: Light ester P-1M and Light ester P-2M manufactured by Kyoeisha Chemical Co., Ltd.) and 2-acryloyloxyethyl acid phosphate (specific examples).
- Examples are Light Acrylate P-1A (manufactured by Kyoeisha Chemical Co., Ltd.), Diphenyl-2-methacryloyloxyethyl phosphate (manufactured by Daihachi Kogyo Co., Ltd., MR-260), and HFA manufactured by Showa Kogyo KK HFA-6003 and HFA-6007, which are addition products of a series (for example, dipentaerythol hexaacrylate and HCA (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide))
- Caprolactone modified di Can contain at least one compound selected from the group consisting of printer erythritol hexaacrylate and HCA as part HFA over 3003 is an addition reaction product of, and HFA-6127, etc.).
- the photopolymerizable compound (D) may contain a prepolymer.
- the prepolymer is, for example, a prepolymer obtained by polymerizing a monomer having an ethylenically unsaturated bond and then adding an ethylenically unsaturated group, and at least one selected from the group consisting of oligo (meth) acrylate prepolymers. Can contain one type.
- Oligo (meth) acrylate prepolymers include, for example, epoxy (meth) acrylate, polyester (meth) acrylate, urethane (meth) acrylate, alkyd resin (meth) acrylate, silicone resin (meth) acrylate, and spirane resin (meth) acrylate At least one selected from the group consisting of
- the content ratio of the photopolymerizable compound (D) is preferably in the range of 3% by mass or more and 35% by mass or less, and more preferably 5% by mass or more and 30% by mass or less based on the carboxyl group-containing unsaturated resin (A). It is more preferably within the range, more preferably within the range of 10% by mass or more and 20% by mass or less.
- the composition (X) contains the epoxy compound (E).
- the epoxy compound (E) is a compound that reacts with a carboxyl group contained in the carboxyl group-containing unsaturated resin (A) under a heating environment. Therefore, the epoxy compound (E) can impart thermosetting properties to the composition (X).
- the equivalent of the epoxy group contained in the epoxy compound (E) may be in the range of 0.8 to 4 with respect to 1 equivalent of the carboxyl group contained in the carboxyl group-containing unsaturated resin (A).
- the equivalent of the epoxy group contained in the epoxy compound (E) is 0.8 or more, the insulation reliability of the electric insulating layer which is a cured product of the composition (X) can be improved.
- the equivalent of the epoxy group is 4 or less, the developability of the composition (X) can be improved.
- the equivalent of the epoxy group is more preferably within a range of 1.0 or more and 3.5 or less, and preferably 1.5 or more and 3 or less with respect to 1 equivalent of the carboxyl group contained in the unsaturated resin (A) containing a carboxyl group. Is more preferably in the range of 2 to 2.8.
- the epoxy compound (E) preferably contains the crystalline epoxy compound (E1). In this case, the developability of the composition (X) can be improved.
- the crystalline epoxy compound (E1) is an epoxy compound having a melting point.
- the crystalline epoxy compound (E1) may have an epoxy equivalent in the range of 90 g / eq to 300 g / eq.
- the epoxy equivalent is the gram weight of a crystalline epoxy compound containing one gram equivalent of epoxy group.
- the melting point of the crystalline epoxy compound (E1) may be, for example, in the range of 70 to 180 ° C.
- Examples of the crystalline epoxy compound (E1) include 1,3,5-tris (2,3-epoxypropyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) trione, tris (2,3-epoxypropyl) isocyanurate, hydroquinone type crystalline epoxy resin (specific example: YDC-1312 manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), biphenyl type crystalline epoxy resin (specific example: manufactured by Mitsubishi Chemical Corporation) Part number YX-4000), diphenyl ether type crystalline epoxy resin (part number YSLV-80DE manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), bisphenol type crystalline epoxy resin (part number YNSV-80XY manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.) ), Tetrakisphenolethane-type crystalline epoxy resin (Nippon Kayaku Co., Ltd. Of Part GTR-1800), including a bisphenol fluorene
- the crystalline epoxy compound (E1) preferably contains a crystalline epoxy compound (E11) having a melting point of 135 ° C. or higher.
- the developability of the composition (X) can be improved.
- the film after exposure is heat-cured to form an electrical insulating layer, the transparency of the electrical insulating layer can be reduced, whereby the electrical insulating layer can have higher concealment properties. . This is considered to be because minute cavities are generated in the electric insulating layer. It is considered that the minute cavities are formed for the following reasons.
- the film after exposure contains a photopolymer of the carboxyl group-containing unsaturated resin (A) and the photopolymerizable compound (D).
- Examples of the crystalline epoxy compound (E11) having a melting point of 135 ° C. or higher include tris (2,3-epoxypropyl) isocyanurate (high melting point type) and hydroquinone type crystalline epoxy resin (specific examples are Nippon Steel & Sumikin Chemical Co., Ltd.). YDC-1312), and a tetrakisphenolethane-type crystalline epoxy resin (specific example, GTR-1800 manufactured by Nippon Kayaku Co., Ltd.).
- the crystalline epoxy compound (E1) may include only the crystalline epoxy compound (E11), or may include both the crystalline epoxy compound (E11) and the crystalline epoxy compound having a melting point of less than 135 ° C.
- Epoxy compound (E) may include amorphous epoxy compound (E2).
- the amorphous epoxy compound (E2) is a compound having no melting point.
- Examples of the amorphous epoxy compound (E2) include bisphenol novolak A type epoxy resin (specific example: EPICLON @ N-865 manufactured by DIC Corporation) and cresol novolak type epoxy resin (specific example: manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.) Product name YDCN-700-7 and DIC Corporation's product name EPICLON @ N-695), phenol novolak type epoxy resin (specific example: DIC Corporation product name EPICLON @ N-775), bisphenol A type epoxy resin (specific example: Nippon Steel Corporation) And a bisphenol F type epoxy resin (specific example: YDF-170 manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
- the amorphous epoxy compound (E2) preferably contains an amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower. That is, the epoxy compound (E) preferably contains an amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower. Since the amorphous epoxy compound (E21) has a softening point of 80 ° C. or lower, it easily softens when a film formed from the composition (X) is heated before exposure, and is contained in the composition (X). It has reactivity with other components. For this reason, the developing solution resistance of the composition (X) is improved, and it becomes easy to form a desired pattern on the electric insulating layer produced by curing the composition (X).
- the amorphous epoxy compound (E21) having a softening point of 80 ° C. or less preferably contains at least one selected from the group consisting of bisphenol novolak A type epoxy resin, cresol novolak type epoxy resin, and phenol novolak type epoxy resin. It is particularly preferable that the amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower contains a bisphenol novolak A-type epoxy resin.
- the curability of the composition (X) is further improved, and the electrical insulating layer produced by curing the composition (X) Thus, a more excellent pattern can be formed.
- the epoxy compound (E) preferably contains both a crystalline epoxy compound (E11) having a melting point of 135 ° C. or higher and an amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower.
- a crystalline epoxy compound (E11) having a melting point of 135 ° C. or higher and an amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower.
- an excellent pattern can be formed by the electric insulating layer produced by curing the composition (X).
- the dispersibility of the crystalline epoxy compound (E11) in the composition (X) can be increased, and the insulating property of the electric insulating layer can be improved.
- the content ratio of the crystalline epoxy compound (E1) is 20% by mass or more and 100% by mass or less based on the epoxy compound (E). Is preferred. In this case, the alkali developability of the composition (X) is improved.
- the content ratio of the crystalline epoxy compound (E1) is more preferably from 30% by mass to 80% by mass, and still more preferably from 40% by mass to 60% by mass, based on the epoxy compound (E). .
- the content of the crystalline epoxy compound (E11) is 20 mass% based on the crystalline epoxy compound (E1). % Or more and 100% by mass or less.
- the electrical insulating layer can have higher concealing properties.
- the content ratio of the crystalline epoxy compound (E11) is more preferably from 50% by mass to 100% by mass, and more preferably from 80% by mass to 100% by mass, based on the crystalline epoxy compound (E1). More preferred.
- the content of the amorphous epoxy compound (E2) is 10% by mass or more and 80% by mass or less based on the epoxy compound (E). Preferably, there is. In this case, the curability of the composition (X) is further improved, and a pattern can be favorably formed on the electric insulating layer produced by curing the composition (X).
- the content ratio of the amorphous epoxy compound (E2) is more preferably from 20% by mass to 70% by mass, and more preferably from 30% by mass to 60% by mass, based on the epoxy compound (E). preferable.
- the content ratio of the amorphous epoxy compound (E21) is the same as that of the amorphous epoxy compound (E2).
- the content is preferably 20% by mass or more and 100% by mass or less.
- the curability of the composition (X) is further improved, and a pattern can be favorably formed on the electric insulating layer produced by curing the composition (X).
- the content ratio of the amorphous epoxy compound (E21) is more preferably from 50% by mass to 100% by mass, and more preferably from 80% by mass to 100% by mass, based on the amorphous epoxy compound (E2). Is more preferred.
- the composition (X) contains at least one of melamine and a melamine derivative (F) (hereinafter, referred to as a component (F)).
- Component (F) may contain only melamine, may contain only melamine derivatives, or may contain melamine and a melamine derivative.
- the composition (X) contains the component (F)
- the adhesion between the electric insulating layer formed from the composition (X) and a metal such as copper is increased. Therefore, the composition (X) is particularly suitable as an insulating material for a printed wiring board. Further, plating resistance in the electric insulating layer can be improved.
- @Melamine is 2,4,6-triamino-1,3,5-triazine, which is generally available from commercially available compounds.
- the melamine derivative is preferably a compound having one triazine ring and an amino group in one molecule.
- Examples of melamine derivatives include guanamine; acetoguanamine; benzoguanamine; 2,4-diamino-6-methacryloyloxyethyl-S-triazine, 2-vinyl-4,6-diamino-S-triazine, 2-vinyl-4,6.
- S-triazine derivatives such as -diamino-S-triazine / isocyanuric acid adduct, 2,4-diamino-6-methacryloyloxyethyl-S-triazine / isocyanuric acid adduct; and melamine such as melamine-tetrahydrophthalate Includes reactants with acid anhydrides. More specific examples of the melamine derivative include VD-1, VD-2, and VD-3 of Shikoku Chemicals Corporation.
- the amount of the component (F) is preferably in the range of 0.5% by mass or more and 15% by mass or less based on the unsaturated resin (A) having a carboxyl group.
- the curability of the composition (X) is further improved, and a pattern can be favorably formed on the electric insulating layer produced by curing the composition (X).
- the plating resistance of the composition (X) can be further improved, and the adhesion between the metal and the electric insulating layer produced from the composition (X) can be further increased.
- the amount of the component (F) is in the range of 1% by mass or more and 10% by mass or less with respect to the carboxyl group-containing unsaturated resin (A).
- the composition (X) may contain an adhesion promoter other than the component (F).
- adhesion promoters include guanamine, acetoguanamine, benzoguanamine; and 2,4-diamino-6-methacryloyloxyethyl-S-triazine, 2-vinyl-4,6-diamino-S-triazine, 2-vinyl- Includes S-triazine derivatives such as 4,6-diamino-S-triazine / isocyanuric acid adduct and 2,4-diamino-6-methacryloyloxyethyl-S-triazine / isocyanuric acid adduct.
- the composition (X) may contain a curing agent for curing the epoxy compound (E).
- curing agents include imidazole, 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 4-phenylimidazole, 1-cyanoethyl-2-phenylimidazole, 1- (2 Imidazole derivatives such as -cyanoethyl) -2-ethyl-4-methylimidazole; dicyandiamide, benzyldimethylamine, 4- (dimethylamino) -N, N-dimethylbenzylamine, 4-methoxy-N, N-dimethylbenzylamine; Amine compounds such as 4-methyl-N, N-dimethylbenzylamine; hydrazine compounds such as adipic hydrazide and sebacic hydrazide; phosphorus compounds such as triphenylphosphine; acid anhydrides;
- the curing agent examples include 2MZ-A, 2MZ-OK, 2PHZ, 2P4BHZ, and 2P4MHZ (all trade names of imidazole-based compounds) manufactured by Shikoku Chemicals Co., Ltd .; U-CAT3503N and U-CAT manufactured by Sun Apro Co., Ltd. CAT3502T (all are trade names of blocked isocyanate compounds of dimethylamine); and DBU, DBN, U-CATSA102, and U-CAT5002 (all are bicyclic amidine compounds and salts thereof).
- the composition (X) may contain an inorganic filler.
- inorganic fillers include barium sulfate, crystalline silica, finely divided silica, nano silica, carbon nanotubes, talc, bentonite, aluminum hydroxide, magnesium hydroxide, magnesium oxide, calcium carbonate, hydrotalcite, clay, calcium silicate, and mica.
- Composition (X) is a curing accelerator; a copolymer such as silicone or acrylate; a leveling agent; an adhesion-imparting agent such as a silane coupling agent; a thixotropic agent; a polymerization inhibitor; an antihalation agent; a flame retardant; It may contain one or more components selected from the group consisting of an agent; an antioxidant; a surfactant; and a polymer dispersant.
- the composition (X) can be prepared by blending the raw materials of the composition (X) as described above and kneading them by a known kneading method using, for example, a three-roll mill, a ball mill, a sand mill, or the like.
- a three-roll mill a ball mill, a sand mill, or the like.
- the raw material of the composition (X) contains a liquid component, a low-viscosity component, and the like
- a portion of the raw material excluding the liquid component, the low-viscosity component, and the like is first kneaded, and the obtained mixture is
- the composition (X) may be prepared by adding and mixing a liquid component, a low-viscosity component, and the like.
- the first agent may be prepared by mixing a part of the components of the composition (X), and the second agent may be prepared by mixing the remaining components. That is, the composition (X) may include a first agent and a second agent. In this case, for example, among the components of the composition (X), the epoxy compound (E), the photopolymerizable compound (D), and a part of the organic solvent are mixed and dispersed in advance to form the first agent.
- the second agent may be prepared by preparing and mixing and dispersing the rest of the components of the composition (X). In this case, a required amount of the first agent and the second agent are appropriately mixed to prepare a liquid mixture, and the liquid mixture is cured to obtain a cured product.
- the composition (X) is suitable as an electrically insulating material for a printed wiring board. That is, the composition (X) is suitable as a material for forming an electrical insulating layer of a printed wiring board.
- the electric insulating layer include a solder resist layer, a plating resist layer, an etching resist layer, and an interlayer insulating layer.
- the electric insulating layer is preferably a solder resist layer.
- the solder resist layer is preferably a cured product of the composition (X). That is, the composition (X) is preferably a composition suitable for a solder resist layer.
- the electrical insulating layer is obtained by exposing a film formed from the composition (X) to heat and curing.
- the coating may be formed directly on the printed wiring board.
- the film can be formed by, for example, a coating method or a dry film method. Examples of the coating method include a dipping method, a spray method, a spin coating method, a roll coating method, a curtain coating method, and a screen printing method.
- Films formed by the coating method may contain volatile components such as organic solvents. Therefore, if necessary, the film is dried by heating to volatilize the organic solvent. Thereby, the film can be dried.
- the heating temperature for drying the film can be set, for example, in the range of 60 to 120 ° C.
- the composition (X) is applied to an appropriate support made of polyester or the like and then dried to form a dry film of the composition (X) on the support.
- the dry film is a dried product of the composition (X). Dry films can be formed in an uncured state.
- the heating temperature can be set, for example, in the range of 60 to 120 ° C.
- preparing an electrical insulating layer from a film first, the film is partially exposed to light and a part of the film is light-cured.
- a negative mask is applied to the film, and then the film is irradiated with ultraviolet rays through the negative mask.
- the negative mask includes an exposed portion that transmits ultraviolet light and a non-exposed portion that blocks ultraviolet light.
- Ultraviolet light sources include, for example, chemical lamps, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, xenon lamps, metal halide lamps, LEDs, g-lines (436 nm), h-lines (405 nm), i-lines (365 nm), and It is selected from the group consisting of two or more combinations of g-line, h-line and i-line.
- a projection exposure method may be employed in which a negative mask is used as the exposure method, but the negative mask is not applied to the film.
- a method other than the method using a negative mask may be adopted.
- the film may be exposed by a direct drawing method in which only the portion of the film to be exposed is irradiated with ultraviolet rays emitted from a light source.
- the film is exposed to ultraviolet light through the support without peeling the support. Irradiation may be performed only on the portion to be squeezed.
- the support is separated from the film before development.
- the developer is, for example, an alkaline aqueous solution containing at least one of an alkali metal salt and an alkali metal hydroxide, or an organic amine.
- the alkaline aqueous solution is more specifically, for example, sodium carbonate, potassium carbonate, ammonium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, ammonium hydrogencarbonate, sodium hydroxide, potassium hydroxide, ammonium hydroxide, tetramethylammonium hydroxide and water.
- aqueous solution containing at least one component selected from the group consisting of lithium oxide.
- the solvent in the alkaline aqueous solution may be water alone or a mixture of water and a hydrophilic organic solvent such as a lower alcohol.
- the organic amine contains, for example, at least one component selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine and triisopropanolamine.
- the developer is preferably an alkaline aqueous solution containing at least one of an alkali metal salt and an alkali metal hydroxide, and particularly preferably an aqueous sodium carbonate solution.
- an alkaline aqueous solution containing at least one of an alkali metal salt and an alkali metal hydroxide, and particularly preferably an aqueous sodium carbonate solution.
- the heating conditions are, for example, a heating temperature in a range of 120 to 200 ° C. and a heating time in a range of 30 to 180 minutes.
- Preferred heating temperatures are in the range of 130-200 ° C.
- the temperature of the film is changed from the time when the film is formed to the time when the exposure of the film is completed. Is preferably maintained at a temperature lower than the melting point Tm (° C.). That is, it is preferable to maintain the temperature of the film at a temperature lower than 135 ° C. until the exposure of the film is completed after the film is formed. At the time of heating after exposure of the film, it is preferable that the heating temperature Th (° C.) and the melting point Tm (° C.) of the crystalline epoxy compound (E11) satisfy the relationship of Th ⁇ Tm-30. In this case, when the film after exposure is thermally cured to form an electric insulating layer, minute cavities are more easily formed in the electric insulating layer.
- the film after the development treatment may be exposed to one or both of before and after heating and further under ultraviolet light.
- the photocuring of the film can be further advanced. Therefore, the strength, hardness, chemical resistance, and the like of the electric insulating layer can be further improved.
- the electric insulating layer can be formed on the printed wiring board.
- the composition (X) has high photosensitivity, so that the film can be sufficiently cured to a deep portion when the film is exposed.
- the mixture was heated with stirring at a heating temperature of 115 ° C. and a heating time of 12 hours while blowing air into the four-necked flask to progress the addition reaction. Subsequently, 77 parts by mass of tetrahydrophthalic anhydride and 82 parts by mass of diethylene glycol monoethyl ether acetate were further added to the four-necked flask. The mixture was heated with stirring at a heating temperature of 80 ° C. for a heating time of 3 hours. Subsequently, 11.4 parts by mass of glycidyl methacrylate and 6 parts by mass of diethylene glycol monoethyl ether acetate were further added to the four-necked flask.
- the mixture was heated with stirring at a heating temperature of 110 ° C. for a heating time of 8 hours, and further heated with stirring at a heating temperature of 80 ° C. for a heating time of 3 hours.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution A-1.
- the weight average molecular weight of the carboxyl group-containing unsaturated resin in the solution A-1 was 13020, the solid acid value was 65, and the content was 65% by mass.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution A-2.
- the weight average molecular weight of the carboxyl group-containing unsaturated resin in the solution A-2 was 7032, the solid acid value was 68, and the content was 65% by mass.
- the mixture was heated with stirring at a heating temperature of 115 ° C. and a heating time of 12 hours while blowing air into the four-necked flask to progress the addition reaction. Subsequently, 77 parts by mass of tetrahydrophthalic anhydride and 82 parts by mass of diethylene glycol monoethyl ether acetate were further added to the four-necked flask. The mixture was heated with stirring at a heating temperature of 80 ° C. for a heating time of 3 hours.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution B-1.
- the weight average molecular weight of the carboxyl group-containing unsaturated resin in the solution B-1 was 8080, the solid acid value was 80, and the content was 65% by mass.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution B-2.
- the weight average molecular weight of the unsaturated resin having a carboxyl group in the solution B-2 was 5,194, the solid acid value was 84, and the content was 65% by mass.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution B-3.
- the weight average molecular weight of the carboxyl group-containing unsaturated resin in the solution B-3 was 5065, the solid acid value was 70, and the content was 65% by mass.
- the mixture was heated while stirring at a heating temperature of 115 ° C. and a heating time of 15 hours while blowing air into the four-necked flask to allow the addition reaction to proceed. Subsequently, 99 parts by mass of cyclohexane-1,2,4-tricarboxylic acid-1,2-anhydride and 92 parts by mass of diethylene glycol monoethyl ether acetate were further added to the four-necked flask. The mixture was heated with stirring at a heating temperature of 80 ° C. and a heating time of 5 hours.
- the mixture was heated with stirring at a heating temperature of 115 ° C. and a heating time of 12 hours while blowing air into the four-necked flask to progress the addition reaction. Subsequently, 77 parts by mass of tetrahydrophthalic anhydride and 82 parts by mass of diethylene glycol monoethyl ether acetate were further added to the four-necked flask. The mixture was heated with stirring at a heating temperature of 80 ° C. for a heating time of 3 hours.
- the resin solution thus obtained was designated as a carboxyl group-containing unsaturated resin solution B-5.
- the weight average molecular weight of the carboxyl group-containing unsaturated resin in the solution B-5 was 18325, the solid acid value was 64, and the content was 65% by mass.
- Crystalline epoxy compound A tris (2,3-epoxypropyl) isocyanurate (high melting point type), melting point 150-158 ° C;
- Crystalline epoxy compound B hydroquinone type crystalline epoxy resin (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd., product number: YDC-1312), melting point: 138 to 145 ° C;
- Crystalline epoxy compound C tris (2,3-epoxypropyl) isocyanurate (low melting type), melting point 98-107 ° C .;
- Amorphous epoxy compound solution A diethylene glycol monoethyl so that bisphenol A novolak type epoxy resin (manufactured by DIC Corporation, part number EPICLON N-865, softening point 64-72 ° C.) has a solid content of 75% by mass.
- Amorphous epoxy compound solution D Cresol novolak type epoxy resin (manufactured by DIC Corporation, part number EPICLON N-695, softening point 90-100 ° C.) having a solid content of 75% by mass.
- Acylphosphine oxide-based photopolymerization initiator A 2,4,6-trimethylbenzoyldiphenylphosphine oxide (manufactured by BASF, product number Irgacure TPO); Acylphosphine oxide-based photopolymerization initiator B: bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (manufactured by BASF, product number Irgacure 819); -Hydrogen abstraction type photopolymerization initiator A: 2,4-diethylthioxanthone (manufactured by Nippon Kayaku Co., Ltd., product number Kayacure DETX-S); -Hydrogen abstraction type photopolymerization initiator B: 4,4'-bis (diethylamino) benzophenone (Hodogaya Chemical Industry Co., Ltd., product number E
- a glass epoxy copper-clad laminate (FR-4 type) having a copper foil having a thickness of 17.5 ⁇ m and a base material having a yellow color was prepared.
- a comb-shaped electrode having a line width / space width of 100 ⁇ m / 100 ⁇ m and a conductor wiring having a line width / space width of 0.2 mm / 0.3 mm are formed by a subtractive method, thus, a printed wiring board (core material) was obtained.
- the surface of the printed wiring board having a thickness of about 1 ⁇ m in the conductive wiring was dissolved and removed with an etching agent (CZ-8101 manufactured by MEC Corporation) to roughen the conductive wiring.
- the exposed film was subjected to a development treatment.
- a development treatment a 1% aqueous solution of Na 2 CO 3 at 30 ° C. was sprayed onto the film at a spray pressure of 0.2 MPa for 60 seconds.
- pure water was sprayed onto the film at a spray pressure of 0.2 MPa for 60 seconds. This removed the unexposed portions of the coating to form holes in the coating.
- C The value obtained by subtracting the line width at the bottom of the solder dam from the line width at the surface of the solder dam is 35 ⁇ m or more and less than 50 ⁇ m.
- D The value obtained by subtracting the line width at the bottom of the solder dam from the line width at the surface of the solder dam is 50 ⁇ m or more.
- solder heat resistance A water-soluble flux (manufactured by London Chemical Company, product number LONCO 3355-11) is applied to the solder resist layer of the test piece, and then the solder resist layer is placed in a 260 ° C. molten solder bath for 10 seconds. After immersion, it was washed with water. After repeating this process three times, the appearance of the solder resist layer was observed, and the results were evaluated as follows. A: No abnormality such as blistering, peeling or discoloration is observed in the solder resist layer. B: No abnormalities such as blistering and peeling were observed in the solder resist layer, but slight discoloration was observed. C: Discoloration and slight abnormalities such as blistering and peeling are observed in the solder resist layer. D: Abnormalities such as blistering, peeling and discoloration are remarkably observed in the solder resist layer.
- B The electric resistance always maintained at 10 6 ⁇ or more until 90 hours passed from the start of the test, but the electric resistance became less than 10 6 ⁇ before 100 hours passed from the start of the test.
- C The electric resistance value was constantly maintained at 10 6 ⁇ or more until 80 hours passed from the start of the test, but before 90 hours passed from the start of the test, the electric resistance value became less than 10 6 ⁇ .
- D The electric resistance value was less than 10 6 ⁇ before 80 hours from the start of the test.
- ⁇ L * is in the range from ⁇ 0.4 to +0.4, and ⁇ a * is in the range from ⁇ 0.2 to less than +0.2.
- ⁇ L * value is in the range of -0.4 or more and +0.4 or less, and ⁇ a * value is in the range of -0.3 or more and less than -0.2 or +0.2 or more +0. Within the range of less than 3.
- L * value of the solder resist layer on the copper foil is 30 or less, a * value is in the range of ⁇ 5.0 or more and +5.0 or less, and b * value is ⁇ 5.0 or more and +5.0.
- ⁇ L * value is in the range of -0.4 or more and +0.4 or less, and ⁇ a * value is in the range of -0.4 or more and less than -0.3 or +0.3 or more +0. Within the range of less than 4.
- D The L * value of the solder resist layer on the copper foil is greater than 30, or the a * value of the solder resist layer on the copper foil is out of the range of ⁇ 5.0 or more and +5.0 or less, or on the copper foil.
- the b * value of the solder resist layer is out of the range of ⁇ 5.0 or more and +5.0 or less, or the ⁇ L * value is out of the range of ⁇ 0.4 or more and +0.4 or less, or the ⁇ a * value is ⁇ . It is less than 0.4 or the ⁇ a * value is +0.4 or more.
- the photosensitive resin composition of the first embodiment according to the present disclosure includes a carboxyl group-containing unsaturated resin (A), a colorant (B), a photopolymerization initiator (C), It contains a compound (D), an epoxy compound (E), and at least one of melamine and a melamine derivative (F).
- the carboxyl group-containing unsaturated resin (A) has at least one of a cresol novolak skeleton and a phenol novolak skeleton, a part of a carboxyl group in a resin (A11) having a carboxyl group and an ethylenically unsaturated group, and an epoxy group.
- the resin (A1) having a structure obtained by reacting with an epoxy group in the unsaturated group-containing monomer (A12).
- the resin (A1) has no urethane bond.
- the colorant (B) includes a black colorant (B1).
- the photopolymerization initiator (C) includes an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction type photopolymerization initiator (C2).
- the film when a film formed from the photosensitive resin composition is exposed, the film can be sufficiently cured to a deep portion.
- the photosensitive resin composition can increase the proportion of unsaturated bonds in the carboxyl group-containing unsaturated resin (A). Therefore, a film formed from the photosensitive resin composition can have good curability. This makes it easier to cure the film formed from the photosensitive resin composition to a deep part.
- the photopolymerization initiator (C) contains an acylphosphine oxide-based photopolymerization initiator (C1) and a hydrogen abstraction type photopolymerization initiator (C2), whereby a film formed from the photosensitive resin composition can be formed. It becomes easier to cure deeper.
- the weight average molecular weight of the resin (A1) is in the range of 4000 to 50,000 in the first embodiment.
- the photosensitive resin composition when the photosensitive resin composition is cured to form the electric insulating layer, it can be sufficiently cured to a deep portion of the film formed from the photosensitive resin composition. Further, when the weight average molecular weight is within this range, the developing solution resistance when a film formed from the photosensitive resin composition is developed after exposure can be improved. Therefore, a desired pattern can be favorably formed on the electrical insulating layer when the electrical insulating layer is manufactured using the photosensitive resin composition.
- the resin (A11) may include at least one of a cresol novolak skeleton and a phenol novolak skeleton, an ethylenically unsaturated group, and a secondary hydroxyl group.
- the resin (A1) has photoreactivity by having an ethylenically unsaturated group derived from the unsaturated group-containing carboxylic acid (a2). For this reason, the unsaturated resin (A) containing a carboxyl group containing the resin (A11) can impart photosensitivity, specifically, ultraviolet curability, to the photosensitive resin composition. Further, since the resin (A1) has a carboxyl group, the carboxyl group-containing unsaturated resin (A) can impart developability with an alkaline aqueous solution to the photosensitive resin composition.
- the resin (a1) is different from the epoxy group in the compound (a11) having at least one of a cresol novolak skeleton and a phenol novolak skeleton and an epoxy group. It has a structure in which a carboxyl group in the saturated group-containing carboxylic acid (a12) has reacted, and has a secondary hydroxyl group generated by this reaction.
- sticking of the wet coating film formed from the photosensitive resin composition is sufficiently suppressed, and the plating resistance and the solder heat resistance of the electric insulating layer (for example, the solder resist layer) are reduced. improves.
- the epoxy compound (E) includes a crystalline epoxy compound (E1).
- the developability of the photosensitive resin composition is further improved, and a good pattern can be formed on the electrical insulating layer produced by curing the photosensitive resin composition.
- the photosensitive resin composition of the sixth aspect is the fifth aspect, wherein the crystalline epoxy compound (E1) contains a crystalline epoxy compound (E11) having a melting point of 135 ° C. or more.
- the concealability of the electrical insulating layer can be improved.
- the epoxy compound (E) contains an amorphous epoxy compound (E21) having a softening point of 80 ° C. or lower.
- the curability of the photosensitive resin composition is improved, and a desired pattern is easily formed on the electric insulating layer produced by curing the photosensitive resin composition.
- the black colorant (B1) contains carbon black.
- the electrical insulating layer made of the photosensitive resin composition can have more excellent concealing properties.
- the photosensitive resin composition of the ninth aspect is, in any one of the first to eighth aspects, a case where a layer made of a cured product of the photosensitive resin composition having a thickness of 25 ⁇ m is formed on a copper foil,
- the L * value of the surface of the layer is 30 or less, the a * value is -5 or more and +5 or less, and the b * value is -5 or more and +5 or less.
- the electrical insulating layer produced by curing the photosensitive resin composition can have a high concealing property.
- the electric insulating layer can also cover the wiring of the printed wiring board.
- the dry film of the tenth aspect contains the photosensitive resin composition of any one of the first to ninth aspects.
- the dry film when the dry film is exposed, it can be sufficiently cured to a deep part.
- an electrical insulating layer can be produced, and the dry film can be sufficiently cured to a deep portion.
- a printed wiring board according to an eleventh aspect includes a solder resist layer containing a cured product of the photosensitive resin composition according to any one of the first to ninth aspects.
- the photosensitive resin composition since the photosensitive resin composition has high photosensitivity, a printed wiring board in which a solder resist layer containing a cured product of the photosensitive resin composition is sufficiently cured to a deep portion is realized. it can.
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Abstract
Description
カラム:SHODEX KF-800P,KF-005,KF-003,KF-001
の4本直列、
移動相:THF、
流量:1ml/分、
カラム温度:45℃、
検出器:RI、
換算:ポリスチレン。
(1-1)合成例A-1
[カルボキシル基含有不飽和樹脂溶液A-1の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、クレゾールノボラック型エポキシ樹脂(新日鉄住金化学株式会社製、品番YDCN-700-10、エポキシ当量205)205質量部、ジエチレングリコールモノエチルエーテルアセテート110質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸77質量部、及びジエチレングリコールモノエチルエーテルアセテート82質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。続いて、四つ口フラスコ内に更にグリシジルメタクリレート11.4質量部、及びジエチレングリコールモノエチルエーテルアセテート6質量部を添加した。そして、この混合物を加熱温度110℃、加熱時間8時間の条件で攪拌しながら加熱し、更に加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液A-1とした。溶液A-1におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は13020、固形酸価は65であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液A-2の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、フェノールノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-775、エポキシ当量189)189質量部、ジエチレングリコールモノエチルエーテルアセテート103質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸77質量部、及びジエチレングリコールモノエチルエーテルアセテート80質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。続いて、四つ口フラスコ内に更にグリシジルメタクリレート11.4質量部、及びジエチレングリコールモノエチルエーテルアセテート6質量部を添加した。そして、この混合物を加熱温度110℃、加熱時間8時間の条件で攪拌しながら加熱し、更に加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液A-2とした。溶液A-2におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は7032、固形酸価は68であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液B-1の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、クレゾールノボラック型エポキシ樹脂(新日鉄住金化学株式会社製、品番YDCN-700-10、エポキシ当量205)205質量部、ジエチレングリコールモノエチルエーテルアセテート110質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸77質量部、及びジエチレングリコールモノエチルエーテルアセテート82質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液B-1とした。溶液B-1におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は8080、固形酸価は80であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液B-2の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、フェノールノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-775、エポキシ当量189)189質量部、ジエチレングリコールモノエチルエーテルアセテート103質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸77質量部、及びジエチレングリコールモノエチルエーテルアセテート80質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液B-2とした。溶液B-2におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は5194、固形酸価は84であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液B-3の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、フェノールノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-775、エポキシ当量189)189質量部、ジエチレングリコールモノエチルエーテルアセテート103質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸61.6質量部、及びジエチレングリコールモノエチルエーテルアセテート72質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液B-3とした。溶液B-3におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は5065、固形酸価は70であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液B-4の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、ビスフェノールA型エポキシ樹脂(新日鉄住金化学株式会社製、品番YD-011、エポキシ当量473)473質量部、ジエチレングリコールモノエチルエーテルアセテート255質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間15時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にシクロヘキサン-1,2,4-トリカルボン酸-1,2-無水物99質量部、及びジエチレングリコールモノエチルエーテルアセテート92質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間5時間の条件で攪拌しながら加熱した。続いて、四つ口フラスコ内に更にグリシジルメタクリレート11.4質量部、及びジエチレングリコールモノエチルエーテルアセテート6質量部を添加した。そして、この混合物を加熱温度110℃、加熱時間8時間の条件で攪拌しながら加熱し、更に加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液B-4とした。溶液B-4におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は5064、固形酸価は80であり、含有量は65質量%であった。
[カルボキシル基含有不飽和樹脂溶液B-5の調製]
還流冷却管、温度計、空気吹き込み管及び攪拌機を取り付けた四つ口フラスコ内に、クレゾールノボラック型エポキシ樹脂(新日鉄住金化学株式会社製、品番YDCN-700-10、エポキシ当量205)205質量部、ジエチレングリコールモノエチルエーテルアセテート110質量部、メトキノン0.2質量部、アクリル酸72質量部、及びトリフェニルホスフィン2質量部を投入して混合することで混合物を調製した。この混合物を、四つ口フラスコ中に空気を吹き込みながら、加熱温度115℃、加熱時間12時間の条件で攪拌しながら加熱して付加反応を進行させた。続いて、四つ口フラスコ内に更にテトラヒドロ無水フタル酸77質量部、及びジエチレングリコールモノエチルエーテルアセテート82質量部を添加した。そして、この混合物を加熱温度80℃、加熱時間3時間の条件で攪拌しながら加熱した。続いて、四つ口フラスコ内に更にイソホロンジイソシアネート4.5質量部、ジブチルスズラウレート0.06質量部、及びジエチレングリコールモノエチルエーテルアセテート5質量部を添加した。そして、この混合物を加熱温度85℃、加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた溶液の赤外吸収スペクトルでは、2260cm-1で示されるイソシアネート基による吸収が確認できない程度に消失していたため、イソホロンジイソシアネートが反応に消費されたことを確認した。その後、四つ口フラスコ内に更にグリシジルメタクリレート11.4質量部、及びジエチレングリコールモノエチルエーテルアセテート3質量部を添加した。そして、この混合物を加熱温度110℃、加熱時間8時間の条件で攪拌しながら加熱し、更に加熱温度80℃加熱時間3時間の条件で攪拌しながら加熱した。このようにして得られた樹脂溶液をカルボキシル基含有不飽和樹脂溶液B-5とした。溶液B-5におけるカルボキシル基含有不飽和樹脂の、重量平均分子量は18325、固形酸価は64であり、含有量は65質量%であった。
実施例1~15及び比較例1~8のそれぞれにおいて、表1~3に示す成分を3本ロールで混練して感光性樹脂組成物を得た。なお、表1~3に示される成分の詳細は次の通りである。
・結晶性エポキシ化合物A:トリス(2,3-エポキシプロピル)イソシアヌレ-ト(高融点型)、融点150~158℃;
・結晶性エポキシ化合物B:ハイドロキノン型結晶性エポキシ樹脂(新日鉄住金化学株式会社製、品番YDC-1312)、融点138~145℃;
・結晶性エポキシ化合物C:トリス(2,3-エポキシプロピル)イソシアヌレ-ト(低融点型)、融点98~107℃;
・非晶性エポキシ化合物溶液A:ビスフェノールAノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-865、軟化点64~72℃)を固形分含有量で75質量%となるようにジエチレングリコールモノエチルエーテルアセテートに溶解させた溶液;
・非晶性エポキシ化合物溶液B:クレゾールノボラック型エポキシ樹脂(新日鉄住金化学株式会社製、品番YDCN-700-7、軟化点68~78℃)を固形分含有量で75質量%となるようにジエチレングリコールモノエチルエーテルアセテートに溶解させた溶液;
・非晶性エポキシ化合物溶液C:フェノールノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-775、軟化点70~80℃)を固形分含有量で75質量%となるようにジエチレングリコールモノエチルエーテルアセテートに溶解させた溶液;・非晶性エポキシ化合物溶液D:クレゾールノボラック型エポキシ樹脂(DIC株式会社製、品番EPICLON N-695、軟化点90~100℃)を固形分含有量で75質量%となるようにジエチレングリコールモノエチルエーテルアセテートに溶解させた溶液;
・アシルフォスフィンオキサイド系光重合開始剤A:2,4,6-トリメチルベンゾイルジフェニルフォスフィンオキサイド(BASF社製、品番Irgacure TPO);
・アシルフォスフィンオキサイド系光重合開始剤B:ビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド(BASF社製、品番Irgacure 819);
・水素引抜型光重合開始剤A:2,4-ジエチルチオキサントン(日本化薬株式会社製、品番カヤキュアDETX-S);
・水素引抜型光重合開始剤B:4,4’-ビス(ジエチルアミノ)ベンゾフェノン(保土ヶ谷化学工業株式会社製、品番EAB);
・α-アミノアルキルフェノン系光重合開始剤:2-メチル-1-(4-メチルチオフェニル)-2-モルフォリノプロパン-1-オン(BASF社製、品番Irgacure 907);
・オキシムエステル系光重合開始剤:エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(0-アセチルオキシム)(BASF社製、品番Irgacure OXE02);
・光重合性化合物:ジペンタエリスリトールヘキサアクリレート(日本化薬株式会社製、品番KAYARAD DPHA);
・メラミン:日産化学工業株式会社製、品番メラミンHM;
・黒色着色剤A:カーボンブラック(Pigment Black 7);
・青色着色剤A:Pigment Blue 15:3;
・青色着色剤B:Pigment Blue 15;
・赤色着色剤A:Pigment Red 177;
・赤色着色剤B:Pigment Red 48:3;
・黄色着色剤A:Pigment Yellow 83;
・微粉シリカ:株式会社トクヤマ製、品番レオロシールMT-10;
・硫酸バリウム:堺化学工業株式会社製、品番バリエースB30;
・タルク:東新化成株式会社製、品番SG2000;
・消泡剤:シメチコン(ジメチコンとケイ酸の混合物)(信越シリコーン株式会社製、品番KS-66)。
各実施例及び比較例の感光性樹脂組成物を、ポリエチレンテレフタレート製のフィルム上にアプリケータで塗布してから、95℃で25分加熱することで乾燥させて、フィルム上に厚み30μmのドライフィルムを形成した。
各実施例及び比較例のテストピースを用いて、下記の評価試験を行った。その結果を後掲の表1~3に示す。
線幅100μmのソルダーダムの断面を観察し、ソルダーダム表面の線幅からソルダーダム底部の線幅を差し引いた値を求め、その結果を次に示すように評価した。
A:ソルダーダム表面の線幅からソルダーダム底部の線幅を引いた値が、25μm未満である。
B:ソルダーダム表面の線幅からソルダーダム底部の線幅を引いた値が、25μm以上35μm未満である。
C:ソルダーダム表面の線幅からソルダーダム底部の線幅を引いた値が、35μm以上50μm未満である。
D:ソルダーダム表面の線幅からソルダーダム底部の線幅を引いた値が、50μm以上である。
テストピースに形成されたソルダーダムに、セロハン粘着テープを貼り付けた後、このセロハン粘着テープを剥離する剥離試験(テープテスト)を行なった。この剥離試験の結果、残存したソルダーダムのうち、最も線幅の細いものの幅を測定した。その結果を以下の基準で評価した。
A:最も細いソルダーダムの線幅が、40μmである。
B:最も細いソルダーダムの線幅が、60μmである。
C:最も細いソルダーダムの線幅が、80μmである。
D:線幅が80μmのソルダーダムが形成されない、又は線幅が80μmのソルダーダムが剥離した。
室温下でテストピースを10%の硫酸水溶液に30分間浸漬した後、ソルダーレジスト層の外観を観察した。その結果を次に示すように評価した。
A:ソルダーレジスト層にふくれ、剥離、変色等の異常は認められない。
B:ソルダーレジスト層にふくれ、剥離等の異常はみとめられないが、変色が僅かに認められる。
C:ソルダーレジスト層に変色とともに、ふくれ、剥離等の異常が僅かに認められる。
D:ソルダーレジスト層にふくれ、剥離、変色等の異常が顕著に認められる。
水溶性フラックス(ロンドンケミカル社製、品番LONCO 3355-11)を、テストピースのソルダーレジスト層に塗布し、続いてソルダーレジスト層を260℃の溶融はんだ浴に10秒間浸漬してから水洗した。この処理を3回繰り返してから、ソルダーレジスト層の外観を観察し、その結果を次に示すように評価した。
A:ソルダーレジスト層にふくれ、剥離、変色等の異常は認められない。
B:ソルダーレジスト層にふくれ、剥離等の異常はみとめられないが、変色が僅かに認められる。
C:ソルダーレジスト層に変色とともに、ふくれ、剥離等の異常が僅かに認められる。
D:ソルダーレジスト層にふくれ、剥離、変色等の異常が顕著に認められる。
市販のメッキ液を用いて、テストピースに無電解ニッケルメッキと無電解金メッキを順次施した。その後、このソルダーレジスト層にセロハン粘着テープ剥離試験を行うことで、メッキ後のソルダーレジスト層と基板との密着状態、及びソルダーレジスト層の外観を確認した。その結果を、次のようにして評価した。
A:セロハン粘着テープ剥離試験でソルダーレジスト層の剥離は認められない。また、ソルダージスト層に変色は見られない。
B:セロハン粘着テープ剥離試験でソルダーレジスト層の剥離は認められないが、ソルダーレジスト層に若干の変色が見られる。
C:セロハン粘着テープ剥離試験でソルダーレジスト層の一部剥離が認められる。
D:セロハン粘着テープ剥離試験でソルダーレジスト層の大きな剥離が認められる。または、ソルダーレジスト層に強い変色が見られる。
テストピースを温度121℃の飽和水蒸気中に8時間放置した後、このテストピースのソルダーレジスト層の外観を観察した。その結果を次に示すように評価した。
A:ソルダーレジスト層にふくれ、剥離、変色等の異常は認められない。
B:ソルダーレジスト層にふくれ、剥離等の異常はみとめられないが、変色が僅かに認められる。
C:ソルダーレジスト層にふくれ、剥離、変色等の異常が僅かに認められる。
D:ソルダーレジスト層にふくれ、剥離、変色等の異常が顕著に認められる。
テストピースの導体配線(ライン幅/スペース幅が100μm/100μmのくし型電極)にDC12Vのバイアス電圧を印加しながら、テストピースを121℃、97%R.H.の試験環境下に100時間曝露した。この試験環境下におけるソルダーレジスト層のくし型電極間の電気抵抗値を常時測定し、その結果を次の評価基準により評価した。
A:試験開始時から100時間経過するまでの間、電気抵抗値が常に106Ω以上を維持した。
B:試験開始時から90時間経過するまでは電気抵抗値が常に106Ω以上を維持したが、試験開始時から100時間経過する前に電気抵抗値が106Ω未満となった。
C:試験開始時から80時間経過するまでは電気抵抗値が常に106Ω以上を維持したが、試験開始時から90時間経過する前に電気抵抗値が106Ω未満となった。
D:試験開始時から80時間経過する前に電気抵抗値が106Ω未満となった。
テストピースの銅箔上のソルダーレジスト層と基板上のソルダーレジスト層との各々の外観色を分光測色計(コニカミノルタセンシング株式会社製、型番CM-600d)で数値化し、その数値はL*a*b*表色系におけるL*値、a*値、及びb*値で示された。そして、銅箔上のソルダーレジスト層のL*値から基板上のソルダーレジスト層のL*値を差し引いたΔL*、銅箔上のソルダーレジスト層のa*値から基板上のソルダーレジストのa*値を差し引いたΔa*値、及び銅箔上のソルダーレジスト層のb*値から基板上のソルダーレジストのb*値を差し引いたΔb*値を求め、下記のように判定した。
A:銅箔上のソルダーレジスト層のL * 値が30以下であり、a*値が-5.0以上+5.0以下の範囲内であり、b*値が-5.0以上+5.0以下の範囲内であり、ΔL*値が-0.4以上+0.4以下の範囲内であり、Δa*値が-0.2以上+0.2未満の範囲内である。
B:銅箔上のソルダーレジスト層のL*値が30以下であり、a*値が-5.0以上+5.0以下の範囲内であり、b*値が-5.0以上+5.0以下の範囲内であり、ΔL*値が-0.4以上+0.4以下の範囲内であり、Δa*値が-0.3以上-0.2未満の範囲内又は+0.2以上+0.3未満の範囲内である。
C:銅箔上のソルダーレジスト層のL*値が30以下であり、a*値が-5.0以上+5.0以下の範囲内であり、b*値が-5.0以上+5.0以下の範囲内であり、ΔL*値が-0.4以上+0.4以下の範囲内であり、Δa*値が-0.4以上-0.3未満の範囲内又は+0.3以上+0.4未満の範囲内である。
D:銅箔上のソルダーレジスト層のL*値が30より大きい、又は銅箔上のソルダーレジスト層のa*値が-5.0以上+5.0以下の範囲外である、又は銅箔上のソルダーレジスト層のb*値が-5.0以上+5.0以下の範囲外である、又はΔL*値が-0.4以上+0.4以下の範囲外である、又はΔa*値が-0.4未満である、又はΔa*値が+0.4以上である。
以上から明らかなように、本開示に係る第一の態様の感光性樹脂組成物は、カルボキシル基含有不飽和樹脂(A)、着色剤(B)、光重合開始剤(C)、光重合性化合物(D)、エポキシ化合物(E)、及びメラミンとメラミン誘導体とのうちの少なくとも一方(F)を含有する。前記カルボキシル基含有不飽和樹脂(A)は、クレゾールノボラック骨格及びフェノールノボラック骨格の少なくとも一方とカルボキシル基とエチレン性不飽和基とを有する樹脂(A11)中のカルボキシル基の一部と、エポキシ基を有する不飽和基含有単量体(A12)中のエポキシ基とを反応させた構造を有する樹脂(A1)を含む。前記樹脂(A1)はウレタン結合を有しない。前記着色剤(B)は黒色着色剤(B1)を含む。前記光重合開始剤(C)は、アシルフォスフィンオキサイド系光重合開始剤(C1)及び水素引抜型光重合開始剤(C2)を含む。
Claims (11)
- カルボキシル基含有不飽和樹脂(A)、
着色剤(B)、
光重合開始剤(C)、
光重合性化合物(D)、
エポキシ化合物(E)、及び
メラミンとメラミン誘導体とのうちの少なくとも一方(F)を含有し、
前記カルボキシル基含有不飽和樹脂(A)は、クレゾールノボラック骨格及びフェノールノボラック骨格の少なくとも一方とカルボキシル基とエチレン性不飽和基とを有する樹脂(A11)中のカルボキシル基の一部と、エポキシ基を有する不飽和基含有単量体(A12)中のエポキシ基とを反応させた構造を有する樹脂(A1)を含み、
前記樹脂(A1)はウレタン結合を有さず、
前記着色剤(B)は黒色着色剤(B1)を含み、
前記光重合開始剤(C)は、アシルフォスフィンオキサイド系光重合開始剤(C1)及び水素引抜型光重合開始剤(C2)を含む、
感光性樹脂組成物。 - 前記樹脂(A1)の重量平均分子量は4000以上50000以下の範囲内である、
請求項1に記載の感光性樹脂組成物。 - 前記樹脂(A11)は、クレゾールノボラック骨格及びフェノールノボラック骨格の少なくとも一方とエチレン性不飽和基と二級の水酸基とを有する樹脂(a1)における二級の水酸基に、多塩基酸無水物(a2)を反応させた構造を有する樹脂(A11-1)を含む、
請求項1又は2に記載の感光性樹脂組成物。 - 前記樹脂(a1)は、クレゾールノボラック骨格及びフェノールノボラック骨格の少なくとも一方とエポキシ基とを有する化合物(a11)におけるエポキシ基と不飽和基含有カルボン酸(a12)におけるカルボキシル基とが反応した構造を有し、この反応により生じた二級の水酸基を有する、
請求項3に記載の感光性樹脂組成物。 - 前記エポキシ化合物(E)は、結晶性エポキシ化合物(E1)を含む、
請求項1から4のいずれか1項に記載の感光性樹脂組成物。 - 前記結晶性エポキシ化合物(E1)は、融点135℃以上の結晶性エポキシ化合物(E11)を含む、
請求項5に記載の感光性樹脂組成物。 - 前記エポキシ化合物(E)は、軟化点80℃以下の非晶性エポキシ化合物(E21)を含む、
請求項1から6のいずれか1項に記載の感光性樹脂組成物。 - 前記黒色着色剤(B1)は、カーボンブラックを含有する、
請求項1から7のいずれか1項に記載の感光性樹脂組成物。 - 銅箔上に厚み25μmの前記感光性樹脂組成物の硬化物からなる層を形成した場合に、前記層の表面のL*値が30以下、a*値が-5以上+5以下、及びb*値が-5以上+5以下である、
請求項1から8のいずれか1項に記載の感光性樹脂組成物。 - 請求項1から9のいずれか1項に記載の感光性樹脂組成物を含有する、
ドライフィルム。 - 請求項1から9のいずれか1項に記載の感光性樹脂組成物の硬化物を含むソルダーレジスト層を備える、
プリント配線板。
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