WO2013162015A1 - Light-curing/heat-curing resin composition, hardened material, and printed circuit board - Google Patents
Light-curing/heat-curing resin composition, hardened material, and printed circuit board Download PDFInfo
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- WO2013162015A1 WO2013162015A1 PCT/JP2013/062448 JP2013062448W WO2013162015A1 WO 2013162015 A1 WO2013162015 A1 WO 2013162015A1 JP 2013062448 W JP2013062448 W JP 2013062448W WO 2013162015 A1 WO2013162015 A1 WO 2013162015A1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
- C08G59/1455—Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof
- C08G59/1461—Unsaturated monoacids
- C08G59/1466—Acrylic or methacrylic acids
-
- 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
- C08G59/4215—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof cycloaliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L63/10—Epoxy resins modified by unsaturated compounds
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0388—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the side chains of the photopolymer
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- 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
- H05K3/285—Permanent coating compositions
- H05K3/287—Photosensitive compositions
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0145—Polyester, e.g. polyethylene terephthalate [PET], polyethylene naphthalate [PEN]
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0158—Polyalkene or polyolefin, e.g. polyethylene [PE], polypropylene [PP]
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0275—Fibers and reinforcement materials
- H05K2201/0284—Paper, e.g. as reinforcement
-
- 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
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3452—Solder masks
Definitions
- the present invention relates to a photocurable thermosetting resin composition, a cured product, and a printed wiring board.
- a photo-curable resin composition is known as a material for a solder resist of a printed wiring board.
- a composition containing an ultraviolet curable resin, a photopolymerization initiator, a diluent, and a thermosetting resin is disclosed.
- a photo-curable resin composition for direct exposure that has been made highly sensitive by containing an oxime ester photopolymerization initiator is also disclosed.
- the curing reaction may proceed even in an unexposed portion when the drying time before exposure becomes long.
- the curing reaction may proceed depending on the environment even during the standing after the drying and before the exposure. In this case, since it cannot develop sufficiently, a residue of the photocurable resin composition is generated on the circuit. When the residue is generated, there is a problem that the gold plating process cannot be performed.
- the present invention relates to a photocurable thermosetting resin composition that is highly sensitive to light and hardly generates a development residue even if the drying time before exposure is prolonged, a cured product comprising the composition, and the cured product It is an object to provide a printed wiring board having the following.
- a polyfunctional epoxy resin and a radically polymerizable unsaturated monocarboxylic acid are reacted to produce an epoxy carbolate having a hydroxyl group in a side chain.
- An epoxy carboxylate and a polybasic acid anhydride are reacted to produce a carboxyl group-containing photosensitive resin (A1), which has the carboxyl group-containing photosensitive resin (A1), an epoxy group, and a radically polymerizable unsaturated group.
- a photocurable thermosetting comprising a carboxyl group-containing photosensitive resin obtained by reacting a compound, (B) a polyfunctional epoxy resin having a softening point of 60 ° C. or lower, and (C) a photopolymerization initiator.
- a functional resin composition is provided.
- the photocurable thermosetting resin composition further contains (D) a carboxyl group-containing acrylic copolymer having an alicyclic skeleton.
- the photocurable thermosetting resin composition further contains a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C., and has a softening point of 60 ° C. or lower.
- the ratio (B1: B′1) of the epoxy group (B1) of the polyfunctional epoxy resin (B) to the epoxy group (B′1) of the polyfunctional epoxy resin (B ′) having a softening point higher than 60 ° C. is 3: 7-9: 1.
- the sum total of group (B'1) is 0.8 equivalent or more and 2.2 equivalent or less with respect to 1 equivalent of carboxyl groups of the said carboxyl group-containing photosensitive resin (A).
- cured material which consists of the said photocurable thermosetting resin composition is provided by the other aspect of this invention.
- cured material is provided by the other aspect of this invention.
- a photocurable thermosetting resin composition that has high sensitivity to light and hardly generates a development residue even if the drying time before exposure is increased, a cured product thereof, and a print having the cured product. Wiring boards can be provided. Moreover, the dry coating film formed using the photocurable thermosetting resin composition provided by this invention is excellent also in finger-drying property.
- the present invention will be described in detail.
- the components contained in the photocurable thermosetting resin composition of the present invention hereinafter also referred to as “the composition of the present invention”.
- the photosensitive resin (A) contained in the composition of the present invention reacts with a polyfunctional epoxy resin and a radically polymerizable unsaturated monocarboxylic acid to produce an epoxy carboxylate having a hydroxyl group in the side chain.
- the carboxyl group-containing photosensitive resin (A1) is produced by reacting an epoxycarboxylate having a polybasic acid anhydride with the carboxyl group-containing photosensitive resin (A1), and an epoxy group and a radically polymerizable unsaturated group. It is the photosensitive resin obtained by making the compound which has this react.
- Epoxy carboxylate is produced by reacting an epoxy group of a polyfunctional epoxy resin with a carboxyl group of a radically polymerizable unsaturated monocarboxylic acid by a known method. In this reaction, the epoxy group of the polyfunctional epoxy resin is ring-opened to generate a hydroxyl group and an ester bond.
- the polyfunctional epoxy resin is a resin having two or more epoxy groups in the molecule, and a known resin can be used.
- the polyfunctional epoxy resin may be a hydrogenated polyfunctional epoxy resin.
- Polyfunctional epoxy resins include bisphenol A type epoxy resin, bisphenol A novolak type epoxy resin, brominated epoxy resin, phenol type epoxy resin, phenol novolac type epoxy resin, cresol type epoxy resin, cresol type novolak type epoxy resin, bisphenol F Type epoxy resin, glycidylamine type epoxy resin, hydantoin type epoxy resin, alicyclic epoxy resin, trihydroxyphenylmethane type epoxy resin, bixylenol type epoxy resin, biphenol type epoxy resin, biphenol novolac type epoxy resin, bisphenol S type epoxy Resin, tetraphenylol ethane type epoxy resin, heterocyclic epoxy resin, diglycidyl phthalate resin, tetraglycidyl xylenoyl ethane resin Naphthalene group-containing epoxy resin, an epoxy resin having a dicyclopentadiene skeleton, glycidyl methacrylate copolymerization system epoxy resins, copolymerized epoxy resins of cyclo
- radically polymerizable unsaturated monocarboxylic acid As the radically polymerizable unsaturated monocarboxylic acid, known compounds can be used, and examples thereof include a compound obtained by adding a polybasic acid anhydride to acrylic acid, methacrylic acid, or a hydroxyl group-containing acrylate.
- Hydroxyl group-containing acrylates include hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) ) Acrylate, phenylglycidyl (meth) acrylate, (meth) acrylic acid caprolactone adduct and the like.
- the polybasic acid anhydride is not particularly limited, and either a saturated polybasic acid anhydride or an unsaturated polybasic acid anhydride can be used.
- examples of such polybasic acid anhydrides include methyltetrahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, nadic anhydride, and 3,6-endomethylenetetrahydrophthalic anhydride.
- Cycloaliphatic dibasic anhydrides such as methylendomethylenetetrahydrophthalic anhydride, tetrabromophthalic anhydride, succinic anhydride, maleic anhydride, itaconic anhydride, octenyl succinic anhydride, pentadodecenyl succinic anhydride, phthalic anhydride, Examples include aliphatic or aromatic polybasic acid anhydrides such as trimellitic anhydride. These polybasic acid anhydrides may be used alone or in admixture of two or more.
- radical polymerizable unsaturated monocarboxylic acid acrylic acid and methacrylic acid are particularly preferable.
- the radically polymerizable unsaturated monocarboxylic acid can be used alone or in combination of two or more.
- (meth) acrylate is a term that collectively refers to acrylate and methacrylate, and the same applies to other similar expressions.
- the photosensitive resin (A1) is obtained by reacting a hydroxyl group of the epoxy carboxylate with a polybasic acid anhydride by a known method. In this reaction, an ester bond and a free carboxyl group are formed.
- the hydroxyl group of the epoxy carboxylate is not limited to the hydroxyl group produced by the reaction between the epoxy group of the polyfunctional epoxy resin and the radical polymerizable unsaturated monocarboxylic acid, but the hydroxyl group originally possessed by the polyfunctional epoxy resin. It may be included.
- the amount of the polybasic acid anhydride used is adjusted so that the acid value of the photosensitive resin (A1) is in the range of 30 to 150 mgKOH / g, preferably 40 to 120 mgKOH / g.
- the acid value of the photosensitive resin (A1) is lower than 30 mgKOH / g, the solubility in an alkaline aqueous solution is deteriorated, and development of the formed coating film is difficult.
- it is higher than 150 mgKOH / g, the surface of the exposed area is developed regardless of the exposure conditions, which is not preferable.
- polybasic acid anhydride there is no restriction
- the compound similar to the above-mentioned polybasic acid anhydride can be used.
- the photosensitive resin (A) is a compound (A2) having a carboxyl group, an epoxy group, and a radical polymerizable unsaturated group of the photosensitive resin (A1) (hereinafter also referred to as a compound (A2)) by a known method. It is produced by reacting.
- the epoxy group of the compound (A2) is opened to form a hydroxyl group and an ester bond.
- the photosensitive resin (A) has more radical polymerizable unsaturated groups than the photosensitive resin (A1). Note that not all carboxyl groups of the photosensitive resin (A1) react with the epoxy group of the compound (A2), but some of the carboxyl groups react with the epoxy group of the compound (A2).
- the introduced radically polymerizable unsaturated group is bonded to the outermost part of the main chain of the photosensitive resin (A1), so that the reactivity in the polymerization reaction of the resin by light is performed. Is stereochemically high and has excellent photocurability.
- examples of the compound (A2) include glycidyl (meth) acrylate, ⁇ -methylglycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, and 3,4-epoxycyclohexylethyl (meth).
- examples thereof include acrylate, 3,4-epoxycyclohexylbutyl (meth) acrylate, 3,4-epoxycyclohexylmethylamino acrylate, and the like. Of these, 3,4-epoxycyclohexylmethyl (meth) acrylate is preferred.
- Such a compound (A) may be used independently or may be used in mixture of 2 or more types.
- the acid curable resin (A) of the present invention preferably has an acid value of 40 to 110 mgKOH / g.
- (B) Polyfunctional epoxy resin having a softening point of 60 ° C. or lower In the composition of the present invention, a photosensitive resin (A), a photopolymerization initiator (C), and a polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower (hereinafter also referred to as “epoxy resin (B)”). By combining these, the sensitivity of the composition can be increased, and the composition is cured well. Moreover, by containing an epoxy resin (B), there is no residue after image development and developability is improved.
- the softening point means a value measured according to the method described in JIS K 7234.
- polyfunctional epoxy resins include bisphenol A such as Epicoat 834 and 828 (manufactured by Japan Epoxy Resin), YD-128 (manufactured by Tohto Kasei Co., Ltd.), 840 and 850 (manufactured by DIC).
- Type epoxy resin 806, 807 (manufactured by Japan Epoxy Resin Co., Ltd.), YDF-170 (manufactured by Tohto Kasei Co., Ltd.), 830, 835, N-730A (manufactured by DIC Co., Ltd.), ZX-1059 (Toto A mixture of bisphenol A and bisphenol F such as YX-8000, 8034 (manufactured by Japan Epoxy Resin) ST-3000 (manufactured by Toto Kasei), such as Nippon Kayaku Co., Ltd. Novolaks such as RE-306CA90 of DEN431, DEN431 and DEN438 manufactured by Dow Chemical Type epoxy resin.
- polyfunctional epoxy resins can be used alone or in combination of two or more.
- the molecular weight of the polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower is preferably 1000 or lower, more preferably 800 or lower, and even more preferably 600 or lower, from the viewpoint of developability. preferable.
- the blending ratio of such a polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower is preferably 1 to 2.8 equivalents of epoxy groups with respect to 1 equivalent of carboxyl groups contained in the photosensitive resin (A). It is a range.
- the softening point in the polyfunctional epoxy resin (B) is preferably 0 ° C. or higher and 55 ° C. or lower, and more preferably 0 ° C. or higher and 50 ° C. or lower.
- the composition of the present invention may contain a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C. Since the glass transition point (Tg) is increased by using the polyfunctional epoxy resin (B) having a softening point of 60 ° C. or less and the polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C., heat resistance is improved. It can be expected to improve the dryness of the touch and to suppress the heat covering.
- the softening point in the polyfunctional epoxy resin (B ′) having a softening point of more than 60 ° C. is preferably 70 ° C. or more, more preferably 80 ° C. or more, still more preferably 90 ° C. or more, and particularly preferably 100 ° C. or more. The higher the softening point, the better the touch dryness.
- the softening point in the polyfunctional epoxy resin (B ′) is, for example, 1000 ° C. or less.
- polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C. for example, ICTEP-S (softening point: 110 ° C.), TEPIC-H, N870 manufactured by Nissan Chemical Co., Ltd., manufactured by Japan Epoxy Resin Co., Ltd. JER1001 (bisphenol A type epoxy resin (softening point: 64 ° C.)).
- the composition of the present invention contains a polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower and a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C.
- the blending ratio of the epoxy group is preferably in the range of 0.3 to 2.8 equivalents, more preferably 0.8 to 2.2, with respect to 1 equivalent of the carboxyl group contained in the photosensitive resin (A).
- the range is 2 equivalents.
- the blending ratio is in the range of 0.8 to 2.2 equivalents, it is possible to improve touch drying, heat resistance and insulation reliability while maintaining good sensitivity and a long development life. preferable.
- the compounding ratio of both resin is the following. It is preferable that it is as follows. That is, the equivalent ratio (B1) of the epoxy group (B1) of the polyfunctional epoxy resin (B) having a softening point of 60 ° C. or less and the epoxy group (B′1) of the polyfunctional epoxy resin (B ′) having a softening point of more than 60 ° C. : B′1) is preferably from 3: 7 to 9: 1, more preferably from 4: 6 to 6: 4. When the ratio of the epoxy group (B1) is 3 or less, the sensitivity may be lowered, which is not preferable.
- the composition of the present invention contains a photopolymerization initiator (C).
- a photopolymerization initiator C
- known and commonly used compounds such as benzophenone, acetophenone, aminoacetophenone, benzoin ether, benzyl ketal, acylphosphine oxide, oxime ether, oxime ester, and titanocene are used. Can be mentioned.
- Examples of the photopolymerization initiator (C) include an oxime ester type containing a structural part represented by the general formula (I), an ⁇ -aminoacetophenone type containing a structural part represented by the general formula (II), and a general formula (III It is preferable to contain 1 type (s) or 2 or more types selected from the group which consists of the acyl phosphine oxide type
- R 1 represents a hydrogen atom, a phenyl group, an alkyl group, a cycloalkyl group, an alkanoyl group or a benzoyl group.
- R 2 represents a phenyl group, an alkyl group, a cycloalkyl group, an alkanoyl group or a benzoyl group.
- the phenyl group represented by R 1 and R 2 may have a substituent, and examples of the substituent include an alkyl group having 1 to 6 carbon atoms, a phenyl group, and a halogen atom.
- the alkyl group represented by R 1 and R 2 is preferably an alkyl group having 1 to 20 carbon atoms, and may contain one or more oxygen atoms in the alkyl chain. Further, it may be substituted with one or more hydroxyl groups.
- the cycloalkyl group represented by R 1 and R 2 is preferably a cycloalkyl group having 5 to 8 carbon atoms.
- the alkanoyl group represented by R 1 and R 2 is preferably an alkanoyl group having 2 to 20 carbon atoms.
- the benzoyl group represented by R 1 and R 2 may have a substituent, and examples of the substituent include an alkyl group having 1 to 6 carbon atoms and a phenyl group.
- R 3 and R 4 each independently represents an alkyl group having 1 to 12 carbon atoms or an arylalkyl group
- R 5 and R 6 each independently represent a hydrogen atom or a carbon number 1 to 6 alkyl groups may be represented, or two may combine to form a cyclic alkyl ether group.
- R 7 and R 8 are each independently an alkyl group having 1 to 10 carbon atoms, a cyclohexyl group, a cyclopentyl group, an aryl group, or an aryl substituted with a halogen atom, an alkyl group or an alkoxy group.
- R 9 and R 10 each independently represent a halogen atom, an aryl group, a halogenated aryl group, or a heterocycle-containing halogenated aryl group.
- Examples of the oxime ester photopolymerization initiator containing a structural moiety represented by the general formula (I) include 1,2-octanedione-1- [4- (phenylthio) -2- (O-benzoyloxime)], ethanone , 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime), a compound represented by the following formula (I-1), 2 And-(acetyloxyiminomethyl) thioxanthen-9-one, and compounds represented by the following general formula (I-2).
- R 11 has the same meaning as R 1 in general formula (I)
- R 12 and R 14 each independently have the same meaning as R 2 in general formula (I).
- R 13 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, a cyclopentyl group, a cyclohexyl group, a phenyl group, a benzyl group, a benzoyl group, an alkanoyl group having 2 to 12 carbon atoms, or an alkoxy group having 2 to 12 carbon atoms.
- a carbonyl group (when the alkyl group constituting the alkoxyl group has 2 or more carbon atoms, the alkyl group may be substituted with one or more hydroxyl groups, and has one or more oxygen atoms in the middle of the alkyl chain) Or a phenoxycarboxylic group.
- Such an oxime ester photopolymerization initiator (C) is preferable because it can increase the sensitivity of the composition of the present invention to exposure light for direct imaging and has excellent resolution.
- the oxime ester photopolymerization initiator (C) is preferably a dimer.
- the dimer oxime ester photopolymerization initiator (C) is more preferably a compound represented by the following general formula (I-3).
- R 23 represents a hydrogen atom, an alkyl group, an alkoxy group, a phenyl group, or a naphthyl group.
- R 21 and R 22 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, a halogen group, a phenyl group, a naphthyl group, an anthryl group, a pyridyl group, a benzofuryl group, or a benzothienyl group.
- Ar is a single bond or an alkylene group having 1 to 10 carbon atoms, vinylene group, phenylene group, biphenylene group, pyridylene group, naphthylene group, anthrylene group, thienylene group, furylene group, 2,5-pyrrole-diyl group, It represents a 4,4′-stilbene-diyl group or a 4,2′-styrene-diyl group.
- n represents an integer of 0 to 1.
- the alkyl group represented by R 23 is preferably an alkyl group having 1 to 17 carbon atoms.
- the alkoxy group represented by R 23 is preferably an alkoxy group having 1 to 8 carbon atoms.
- the phenyl group represented by R 23 may have a substituent.
- the substituent include an alkyl group (preferably having 1 to 17 carbon atoms) and an alkoxy group (preferably having 1 to 8 carbon atoms). ), An amino group, an alkylamino group (preferably an alkyl group having 1 to 8 carbon atoms) or a dialkylamino group (preferably an alkyl group having 1 to 8 carbon atoms).
- the naphthyl group represented by R 23 may have a substituent, and examples of the substituent include the same groups as the above-described substituent that the phenyl group represented by R 23 may have.
- the alkyl group represented by R 21 and R 22 is preferably an alkyl group having 1 to 17 carbon atoms.
- the alkoxy group represented by R 21 and R 22 is preferably an alkoxy group having 1 to 8 carbon atoms.
- the phenyl group represented by R 21 and R 22 may have a substituent. Examples of the substituent include an alkyl group (preferably having 1 to 17 carbon atoms) and an alkoxy group (preferably having a carbon number). 1-8), an amino group, an alkylamino group (preferably an alkyl group having 1 to 8 carbon atoms) or a dialkylamino group (preferably an alkyl group having 1 to 8 carbon atoms).
- the naphthyl group represented by R 21 and R 22 may have a substituent, and the substituent is the same as the above substituent that the phenyl group represented by R 21 and R 22 may have. Groups.
- R 23 and R 21 are each independently a methyl group or an ethyl group
- R 22 is methyl or phenyl
- Ar is a single bond, a phenylene group, or a naphthylene.
- Group or thienylene group, n is preferably 0.
- ⁇ -aminoacetophenone photopolymerization initiator containing a structural moiety represented by the general formula (II), 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone-1, 2- Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) ) Phenyl] -1-butanone, N, N-dimethylaminoacetophenone and the like.
- a structural moiety represented by the general formula (II) 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone-1, 2- Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, 2- (dimethylamino) -2-[(4-
- Examples of the acylphosphine oxide photopolymerization initiator containing a structural moiety represented by the general formula (III) include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine.
- Examples include fin oxide and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide.
- the titanocene photopolymerization initiator represented by the general formula (IV) includes bis ( ⁇ 5 -2,4-cyclopentadien-1-yl) -bis (2,6-difluoro-3- (1H-pyrrole) 1-yl) -phenyl) titanium.
- the blending ratio of such a photopolymerization initiator (C) is preferably 0.01 to 30 parts by mass, more preferably 0.5 to 15 parts by mass with respect to 100 parts by mass of the photosensitive resin (A). It is. When the blending ratio of the photopolymerization initiator (C) is less than 0.01 parts by mass with respect to 100 parts by mass of the photosensitive resin (A), photocurability on copper is insufficient and the coating film peels off. The coating properties such as chemical resistance may deteriorate, which is not preferable.
- the blending ratio of the photopolymerization initiator (C) exceeds 30 parts by mass with respect to 100 parts by mass of the photosensitive resin (A), the deep curability decreases due to light absorption of the photopolymerization initiator (C). Since it may be, it is not preferable.
- the blending ratio is preferably based on 100 parts by mass of the photosensitive resin (A). Is a ratio of 0.01 to 20 parts by mass, more preferably 0.01 to 5 parts by mass.
- an oxime ester photopolymerization initiator it is preferably used in combination with an ⁇ -aminoacetophenone photopolymerization initiator in order to improve the sensitivity to exposure light.
- the absorbance at 405 nm or 365 nm is 0.4 to 1.5 at a film thickness of 10 to 20 ⁇ m in the dry coating film of the composition. From the viewpoint of resolution, it is preferable to adjust the content of the photopolymerization initiator (C).
- the composition of the present invention may contain (D) a carboxyl group-containing acrylic copolymer (hereinafter referred to as “carboxyl group-containing acrylic copolymer (D)”) having an alicyclic skeleton.
- the carboxyl group-containing acrylic copolymer (D) is a resin having at least one alicyclic skeleton in the main chain or side chain.
- a well-known thing can be used as a carboxyl group-containing acrylic copolymer (D).
- Examples of the carboxyl group-containing acrylic copolymer (D) include the following.
- the photosensitive resin (2) is preferable.
- the carboxyl group-containing acrylic copolymer (D) is obtained by copolymerizing a (meth) acrylic acid ester and a radically polymerizable unsaturated monocarboxylic acid.
- (Meth) acrylic acid esters such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, etc.
- Hydroxyl-containing (meth) acrylic acid esters such as acid alkyl esters, 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, caprolactone-modified 2-hydroxyethyl (meth) acrylate, Methoxydiethylene glycol (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, isooctyloxydiethylene glycol (meth) acrylate, phenoxytriethylene glycol Meth) acrylate, methoxy triethylene glycol (meth) acrylate, glycol-modified (meth) acrylates such as methoxy polyethylene glycol (meth) acrylate.
- the above-mentioned compounds can be used as the radical polymerizable unsaturated monocarboxylic acid.
- the alicyclic compound having 1 epoxy group and a radically polymerizable unsaturated double bond is the same as the above-described compound.
- the carboxyl group-containing acrylic copolymer (D) preferably has an acid value in the range of 50 to 200 mgKOH / g.
- the acid value is less than 50 mgKOH / g, it is difficult to remove the unexposed portion of the coating film of the photocurable thermosetting composition with a weak alkaline aqueous solution.
- oxidation exceeds 200 mgKOH / g, there exists a problem that the water resistance of a cured film and an electrical property are inferior.
- the weight average molecular weight of the carboxyl group-containing acrylic copolymer (D) is preferably in the range of 5,000 to 100,000.
- the mass average molecular weight is less than 5,000, the dryness to touch of the coating film of the photocurable thermosetting resin composition tends to be extremely inferior. On the other hand, if the mass average molecular weight exceeds 100,000, it is not preferable because the developability and storage stability of the photocurable thermosetting composition are remarkably deteriorated.
- the mixing ratio of the carboxyl group-containing acrylic copolymer (D) is, for example, 10 to 95 parts by mass, preferably 10 to 50 parts by mass, when the total amount with the photosensitive resin (A) is 100 parts by mass. It is.
- the photocurable thermosetting resin composition of the present invention may contain a photocurable monomer.
- a photocurable monomer a compound having two or more ethylenically unsaturated groups in the molecule is preferable, and the compound is photocured by ultraviolet irradiation to insolubilize the carboxylic acid resin (A) in an alkaline aqueous solution. Or it helps insolubilization.
- glycol diacrylates such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, and propylene glycol; hexanediol, trimethylolpropane, pentaerythritol, dipentaerythritol, tris-hydroxyethyl isocyanurate, and the like.
- Polyhydric acrylates such as polyhydric alcohols or their ethylene oxide adducts or propylene oxide adducts; Phenoxy acrylate, bisphenol A diacrylate, and polyhydric acrylates such as ethylene oxide adducts or propylene oxide adducts of these phenols Glycerin diglycidyl ether, glycerin triglycidyl ether, trimethylolpropane triglycy Ethers, polyvalent acrylates of glycidyl ethers such as triglycidyl isocyanurate; and melamine acrylate, and / or the like each methacrylates corresponding to the acrylates.
- an epoxy acrylate resin obtained by reacting acrylic acid with a polyfunctional epoxy resin such as a cresol novolac type epoxy resin, and further, a hydroxy acrylate such as pentaerythritol triacrylate and a diisocyanate such as isophorone diisocyanate on the hydroxyl group of the epoxy acrylate resin.
- a polyfunctional epoxy resin such as a cresol novolac type epoxy resin
- a hydroxy acrylate such as pentaerythritol triacrylate
- a diisocyanate such as isophorone diisocyanate
- the blending ratio of such a photocurable monomer is preferably 5 to 100 parts by mass, more preferably 1 to 70 parts by mass with respect to 100 parts by mass of the photosensitive resin (A).
- the blending ratio is less than 5 parts by mass, the photocurability is lowered, and pattern development becomes difficult by alkali development after ultraviolet irradiation, which is not preferable.
- the amount exceeds 100 parts by mass, the solubility in an aqueous alkali solution is reduced and the coating film becomes brittle, which is not preferable.
- thermosetting catalyst The photocurable thermosetting resin composition of the present invention may contain a thermosetting catalyst.
- thermosetting catalysts include imidazole, 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 4-phenylimidazole, 1-cyanoethyl-2-phenylimidazole.
- Imidazole derivatives such as 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole; dicyandiamide, benzyldimethylamine, 4- (dimethylamino) -N, N-dimethylbenzylamine, 4-methoxy-N, N -Amine compounds such as dimethylbenzylamine and 4-methyl-N, N-dimethylbenzylamine, hydrazine compounds such as adipic hydrazide and sebacic acid hydrazide; phosphorus compounds such as triphenylphosphine, , For example, four 2MZ-A, 2MZ-OK, 2PHZ, 2P4BHZ, 2P4MHZ (all trade names of imidazole compounds) manufactured by Kasei Kogyo Co., Ltd., U-CAT3503N, U-CAT3502T (all are dimethylamine block isocyanate compounds) Product name), DBU, DBN, U-CATSA102, U-
- the present invention is not limited to these, and any epoxy resin thermosetting catalyst or any one that promotes the reaction between the epoxy group and the carboxyl group may be used alone or in admixture of two or more.
- the blending ratio of the thermosetting catalyst may be a ratio that is usually used. For example, 0.1 to 20 parts by mass, preferably 0.1 to 0.1 parts by mass with respect to 100 parts by mass of the photosensitive resin (A) or the polyfunctional epoxy resin (B). It can be used at a ratio of 5 to 15.0 parts by mass.
- the photocurable thermosetting resin composition of the present invention can contain a filler as necessary in order to increase the physical strength of the coating film.
- a filler known and commonly used inorganic or organic fillers can be used.
- barium sulfate, spherical silica and talc are preferably used.
- NANOCRYL trade names
- the blending ratio of these fillers is preferably 300 parts by mass or less, more preferably 0.1 to 300 parts by mass, and still more preferably 0.1 to 150 parts by mass with respect to 100 parts by mass of the photosensitive resin (A). It is a ratio.
- the blending ratio of the filler exceeds 300 parts by mass, it is not preferable because the viscosity of the composition becomes high and the printability is lowered or the cured product becomes brittle.
- the photocurable thermosetting resin composition of the present invention may contain an organic solvent in order to adjust to a viscosity suitable for the coating method.
- organic solvents include ketones, aromatic hydrocarbons, glycol ethers, glycol ether acetates, esters, alcohols, aliphatic hydrocarbons, petroleum solvents, and the like.
- ketones such as methyl ethyl ketone and cyclohexanone; aromatic hydrocarbons such as toluene, xylene and tetramethylbenzene; cellosolve, methyl cellosolve, butyl cellosolve, carbitol, methyl carbitol, butyl carbitol, propylene glycol monomethyl Glycol ethers such as ether, dipropylene glycol monomethyl ether, dipropylene glycol diethyl ether, triethylene glycol monoethyl ether; ethyl acetate, butyl acetate, dipropylene glycol methyl ether acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate , Esters such as propylene glycol butyl ether acetate and carbitol acetate Ethanol, propanol, ethylene glycol, alcohols such as propylene glycol,
- the photocurable thermosetting resin composition of the present invention may further comprise a known and commonly used thermal polymerization inhibitor such as hydroquinone, hydroquinone monomethyl ether, t-butylcatechol, pyrogallol, phenothiazine, fine silica, organic bentonite, Known and commonly used thickeners such as montmorillonite, defoamers and / or leveling agents such as silicone, fluorine and polymer, silane coupling agents such as imidazole, thiazole and triazole, blue, yellow and red Known additives such as black and white colorants can be blended.
- a known and commonly used thermal polymerization inhibitor such as hydroquinone, hydroquinone monomethyl ether, t-butylcatechol, pyrogallol, phenothiazine, fine silica, organic bentonite, Known and commonly used thickeners such as montmorillonite, defoamers and / or leveling agents such as silicone, flu
- a printed wiring board has the hardened
- cured material which consists of a photocurable thermosetting composition on the base material which has a circuit pattern.
- Such a printed wiring board can be manufactured by the following method.
- the photocurable thermosetting resin composition of the present invention is adjusted to a viscosity suitable for a coating method with an organic solvent, for example, on a substrate on which a circuit is formed, a dip coating method, a flow coating method, a spin coating method,
- the coating is applied by a roll coating method, bar coater method, screen printing method, curtain coating method or the like, and the organic solvent contained in the composition is evaporated and dried (temporary drying) at a temperature of about 60 to 100 ° C. Form a coating film.
- the film is selectively exposed to ultraviolet rays through a photomask, and the unexposed portion is developed with a dilute alkali aqueous solution (for example, 0.3 to 3% sodium carbonate aqueous solution) to form a cured product having a pattern.
- a dilute alkali aqueous solution for example, 0.3 to 3% sodium carbonate aqueous solution
- the volatile drying performed after the photocurable thermosetting resin composition is applied may be a hot air circulation drying oven, an IR oven, a hot plate, a convection oven or the like (having a heat source of an air heating method using steam).
- the method can be carried out using a method in which hot air in the dryer is brought into countercurrent contact and a method in which the hot air is blown onto the support from a nozzle.
- the exposure apparatus used for the ultraviolet irradiation may be an exposure apparatus that generates ultraviolet rays.
- a high-pressure mercury lamp, an ultra-high pressure mercury lamp, a metal halide lamp or the like is preferable.
- the exposure apparatus include HMW-680GW manufactured by Oak Manufacturing Co., Ltd. and ADEX 600P manufactured by Adtech Engineering Co., Ltd., which can be used in the present invention.
- a direct drawing apparatus for example, a laser direct imaging apparatus that directly draws an image with a laser using CAD data from a computer
- an ultraviolet lamp such as a (super) high pressure mercury lamp, and the like.
- the direct drawing apparatus used can be used.
- a direct drawing apparatus for example, those made by Nippon Orbotech, Oak, etc. can be used.
- Development methods include dipping, showering, spraying, brushing, etc.
- Developers include potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium phosphate, sodium silicate, ammonia, tetra Alkaline aqueous solutions such as methylammonium hydroxide can be used.
- the printed wiring board which has hardened
- the photo-curable thermosetting resin composition of the present invention is suitable as a material for a permanent film of a printed wiring board, but is particularly suitable as a material for a solder resist and an interlayer insulating material.
- the solid content (amount excluding the solvent) of the photosensitive resin solution (A1) thus obtained was 65%, and the acid value of the solid content was 89 mgKOH / g.
- Photosensitive resin (A-1) 700 g of diethylene glycol monoethyl ether acetate and 1070 g of orthocresol novolac type epoxy resin (manufactured by DIC Corporation, EPICLON N-695, softening point 95 ° C., epoxy equivalent 214, average functional group number 7.6): number of glycidyl groups (total number of aromatic rings): 5.0 mol), 360 g (5.0 mol) of acrylic acid, and 1.5 g of hydroquinone were charged, heated and stirred at 100 ° C., and uniformly dissolved.
- A-1 700 g of diethylene glycol monoethyl ether acetate and 1070 g of orthocresol novolac type epoxy resin (manufactured by DIC Corporation, EPICLON N-695, softening point 95 ° C., epoxy equivalent 214, average functional group number 7.6): number of glycidyl groups (total number of aromatic rings): 5.0 mol), 360 g (5.0 mol)
- the solid content of the photosensitive resin solution (A-1) thus obtained was 65%, and the acid value of the solid content was 87 mgKOH / g.
- A-2 SP-3900 (manufactured by Showa Denko KK, solid content 65%, acid value: 70 mg KOH / g)
- B-1 Bisphenol A type epoxy resin (834: manufactured by Japan Epoxy Resin Co., Ltd., epoxy equivalent 250, normal temperature semi-solid, softening point 60 ° C.
- B-2 Polyglycidyl ether of phenol novolac (RE306CA90: Nippon Kayaku Co., Ltd., epoxy equivalent 196, softening point 50 ° C., molecular weight 400)
- B-3 Phenol novolac type epoxy resin (DEN431: manufactured by Dow Chemical Company, epoxy equivalent 174, normal temperature semi-solid, softening point 60 ° C.
- B-4 Phenol novolac type epoxy resin (DEN438: manufactured by Dow Chemical Company, epoxy equivalent 199, softening point 40 ° C., molecular weight 600)
- B-5 Bisphenol A novolak type epoxy resin (Epiclon N-870: DIC, epoxy equivalent 205, softening point 70 ° C., molecular weight 1600)
- B-6 ICTEP-S (Nissan Chemical Co., Ltd., epoxy equivalent 100, softening point 110 ° C.) ⁇ (C) Photopolymerization initiator>
- C-1 2-Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one
- C-2 2-Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one
- This dried coating film is exposed through a step tablet (Stuffer 41 stage) using an exposure apparatus equipped with a metal halide lamp, and development (1 mass% Na 2 CO 3 aqueous solution, 30 ° C., 0.2 MPa) is performed in 60 seconds. I read the pattern of the remaining step tablet. It can be seen that when the sensitivity is 7 or more, the photocurable resin composition can be sufficiently cured because the sensitivity is high.
- the photocurable thermosetting resin composition prepared above was applied onto the entire surface of a circuit pattern substrate having a thickness of 35 ⁇ m which was washed with water and dried by screen printing.
- the substrate was put into an 80 ° C. hot air circulation drying oven and dried, the longest time during which development failure due to heat covering did not occur was examined. Specifically, drying was performed at 80 ° C. for 30, 40, 50, and 60 minutes, development was performed under the above-described development conditions, and whether or not development was possible at each time was tested. At this time, the surface of copper was visually observed, and development was possible if the components of the photocurable thermosetting resin composition did not remain as a residue, and this time was described. This is called the drying control width, and the longer the drying time, the better the productivity.
- the photocurable thermosetting resin composition prepared above was applied onto the entire surface of a circuit pattern substrate having a thickness of 35 ⁇ m which was washed with water and dried by screen printing.
- the substrate was placed in a hot air circulation drying oven at 80 ° C. and dried for 40 minutes.
- a negative pattern film (negative film) was placed on the dried coating film and exposed using an exposure apparatus equipped with a metal halide lamp.
- a cured film was obtained by irradiating the dry coating film under the negative film so that the integrated exposure amount was 50 mJ / cm 2 .
- the negative film was peeled off from the cured film, the presence or absence of negative film marks was confirmed.
- there is no negative film mark it means that the dry touch of the dried coating film is good.
- the dry touch of the dried coating film is poor.
- Negative film trace ⁇ Adhered to the negative film and peeled off with the dry coating film.
- the photocurable thermosetting resin composition prepared above is printed on the entire surface of the circuit pattern substrate having a thickness of 35 ⁇ m, which is washed with water and dried, by screen printing, and then dried at 80 ° C. with hot air circulation. Dry in an oven for 30 minutes. Thereby, the dry coating film of the photocurable thermosetting resin composition was obtained.
- This dry coating film was exposed with an exposure amount obtained by 8 steps using a step tablet (Stuffer 41 steps) using an exposure apparatus equipped with a metal halide lamp, and developed (1 mass% Na 2 CO 3 aqueous solution, 30 ° C., 0.2 MPa). Was performed in 60 seconds, and further cured at 150 ° C. for 60 minutes to prepare a cured coating film.
- coated water-soluble flux to the obtained cured coating film is immersed in the solder tank previously set to 260 degreeC, and after washing
- the judgment criteria are as follows.
- This dry coating film was exposed with an exposure amount obtained by 8 steps using a step tablet (Stuffer 41 steps) using an exposure apparatus equipped with a metal halide lamp, and developed (1 mass% Na 2 CO 3 aqueous solution, 30 ° C., 0.2 MPa). Was performed in 60 seconds, and further cured at 150 ° C. for 60 minutes to prepare a cured coating film.
- a bias voltage of DC 30 V was applied to this comb-shaped electrode, and the insulation resistance value and corrosion after 1000 hours were evaluated while humidifying at 80 ° C. and 80%.
- the judgment criteria are as follows.
- Insulation resistance value is 1 ⁇ 10 12 ⁇ or more. No corrosion is seen.
- the insulation resistance value is 1 ⁇ 10 9 ⁇ or more and less than 1 ⁇ 10 12 ⁇ . Corrosion is seen.
- Insulation resistance value is less than 1 ⁇ 10 9 ⁇ . Corrosion is seen.
Abstract
Description
また、本発明の他の形態において、上記光硬化性熱硬化性樹脂組成物は、更に軟化点が60℃を超える多官能エポキシ樹脂(B’)を含有し、上述した軟化点60℃以下の多官能エポキシ樹脂(B)のエポキシ基(B1)と軟化点60℃超の多官能エポキシ樹脂(B')のエポキシ基(B’1)との比(B1:B’1)が、3:7~9:1である。 In one embodiment of the present invention, the photocurable thermosetting resin composition further contains (D) a carboxyl group-containing acrylic copolymer having an alicyclic skeleton.
In another embodiment of the present invention, the photocurable thermosetting resin composition further contains a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C., and has a softening point of 60 ° C. or lower. The ratio (B1: B′1) of the epoxy group (B1) of the polyfunctional epoxy resin (B) to the epoxy group (B′1) of the polyfunctional epoxy resin (B ′) having a softening point higher than 60 ° C. is 3: 7-9: 1.
また、本発明の他の態様により、上記硬化物からなる絶縁層を具備するプリント配線板が提供される。 Moreover, the hardened | cured material which consists of the said photocurable thermosetting resin composition is provided by the other aspect of this invention.
Moreover, the printed wiring board which comprises the insulating layer which consists of the said hardened | cured material is provided by the other aspect of this invention.
まず、本発明の光硬化性熱硬化性樹脂組成物(以下において「本発明の組成物」などともいう。)に含有される成分について説明する。 Hereinafter, the present invention will be described in detail.
First, the components contained in the photocurable thermosetting resin composition of the present invention (hereinafter also referred to as “the composition of the present invention”) will be described.
本発明の組成物に含有される感光性樹脂(A)は、多官能エポキシ樹脂とラジカル重合性不飽和モノカルボン酸を反応させて、側鎖に水酸基を有するエポキシカルボキシレートを生成し、この水酸基を有するエポキシカルボキシレートと多塩基酸無水物を反応させて、カルボキシル基含有感光性樹脂(A1)を生成し、このカルボキシル基含有感光性樹脂(A1)と、エポキシ基とラジカル重合性不飽和基を有する化合物を反応させて得られる感光性樹脂である。 [(A) carboxyl group-containing photosensitive resin (hereinafter also referred to as “photosensitive resin”)]
The photosensitive resin (A) contained in the composition of the present invention reacts with a polyfunctional epoxy resin and a radically polymerizable unsaturated monocarboxylic acid to produce an epoxy carboxylate having a hydroxyl group in the side chain. The carboxyl group-containing photosensitive resin (A1) is produced by reacting an epoxycarboxylate having a polybasic acid anhydride with the carboxyl group-containing photosensitive resin (A1), and an epoxy group and a radically polymerizable unsaturated group. It is the photosensitive resin obtained by making the compound which has this react.
エポキシカルボキシレートは、公知の方法で、多官能エポキシ樹脂のエポキシ基と、ラジカル重合性不飽和モノカルボン酸のカルボキシル基とを反応させることにより生成する。この反応では、多官能エポキシ樹脂のエポキシ基が開環することにより、水酸基とエステル結合が生成する。 [Generation of Epoxy Carboxylate Having Hydroxyl Group in Side Chain (hereinafter, also referred to as “Epoxy Carboxylate”)]
Epoxy carboxylate is produced by reacting an epoxy group of a polyfunctional epoxy resin with a carboxyl group of a radically polymerizable unsaturated monocarboxylic acid by a known method. In this reaction, the epoxy group of the polyfunctional epoxy resin is ring-opened to generate a hydroxyl group and an ester bond.
多官能エポキシ樹脂は、分子中にエポキシ基を2個以上有する樹脂であり、公知の樹脂を使用できる。なお、多官能エポキシ樹脂は、水素添加された多官能エポキシ樹脂であってもよい。 (Polyfunctional epoxy resin)
The polyfunctional epoxy resin is a resin having two or more epoxy groups in the molecule, and a known resin can be used. The polyfunctional epoxy resin may be a hydrogenated polyfunctional epoxy resin.
ラジカル重合性不飽和モノカルボン酸としては、公知のものを使用できるが、例えば、アクリル酸、メタアクリル酸、水酸基含有アクリレートに多塩基酸無水物が付加した化合物などが挙げられる。 (Radically polymerizable unsaturated monocarboxylic acid)
As the radically polymerizable unsaturated monocarboxylic acid, known compounds can be used, and examples thereof include a compound obtained by adding a polybasic acid anhydride to acrylic acid, methacrylic acid, or a hydroxyl group-containing acrylate.
感光性樹脂(A1)は、公知の方法で、エポキシカルボキシレートが有する水酸基と、多塩基酸無水物とを反応させることにより得られる。この反応では、エステル結合と遊離のカルボキシル基が生成する。なお、エポキシカルボキシレートが有する水酸基には、多官能エポキシ樹脂のエポキシ基とラジカル重合性不飽和モノカルボン酸の反応により生成する水酸基のほかに、元来多官能エポキシ樹脂が有していた水酸基が含まれていてもよい。 [Generation of carboxyl group-containing photosensitive resin (A1) (hereinafter also referred to as photosensitive resin (A1))]
The photosensitive resin (A1) is obtained by reacting a hydroxyl group of the epoxy carboxylate with a polybasic acid anhydride by a known method. In this reaction, an ester bond and a free carboxyl group are formed. The hydroxyl group of the epoxy carboxylate is not limited to the hydroxyl group produced by the reaction between the epoxy group of the polyfunctional epoxy resin and the radical polymerizable unsaturated monocarboxylic acid, but the hydroxyl group originally possessed by the polyfunctional epoxy resin. It may be included.
多塩基酸無水物の使用量は、感光性樹脂(A1)の酸価が30~150mgKOH/g、好ましくは40~120mgKOH/gの範囲内になるように調整する。感光性樹脂(A1)の酸価が30mgKOH/gよりも低い場合には、アルカリ水溶液に対する溶解性が悪くなり、形成した塗膜の現像が困難になる。一方、150mgKOH/gよりも高くなると、露光の条件によらず露光部の表面まで現像されてしまい、好ましくない。 (Polyacid anhydride)
The amount of the polybasic acid anhydride used is adjusted so that the acid value of the photosensitive resin (A1) is in the range of 30 to 150 mgKOH / g, preferably 40 to 120 mgKOH / g. When the acid value of the photosensitive resin (A1) is lower than 30 mgKOH / g, the solubility in an alkaline aqueous solution is deteriorated, and development of the formed coating film is difficult. On the other hand, if it is higher than 150 mgKOH / g, the surface of the exposed area is developed regardless of the exposure conditions, which is not preferable.
感光性樹脂(A)は、公知の方法で、感光性樹脂(A1)のカルボキシル基と、エポキシ基とラジカル重合性不飽和基を有する化合物(A2)(以下、化合物(A2)ともいう。)を反応させることにより生成する。 [Formation of photosensitive resin (A)]
The photosensitive resin (A) is a compound (A2) having a carboxyl group, an epoxy group, and a radical polymerizable unsaturated group of the photosensitive resin (A1) (hereinafter also referred to as a compound (A2)) by a known method. It is produced by reacting.
本発明の組成物では、感光性樹脂(A)と光重合開始剤(C)と軟化点が60℃以下の多官能エポキシ樹脂(B)(以下、「エポキシ樹脂(B)」ともいう。)を組み合わせることにより、組成物の感度を高めることができ、組成物が良好に硬化する。また、エポキシ樹脂(B)を含有させることにより、現像後の残渣がなく、現像性が改善される。ここで、軟化点は、JIS K 7234に記載の方法に従い測定される値を意味する。 軟化点が60℃以下の多官能エポキシ樹脂(B)としては、公知のものでよいが、例えば、20~30℃の室温で液状であることが好ましい。このような多官能エポキシ樹脂としては、ジャパンエポキシレジン社製のエピコート834、828(ジャパンエポキシレジン社製)、YD-128(東都化成社製)、840、850(DIC社製)などのビスフェノールA型エポキシ樹脂、806、807(ジャパンエポキシレジン社製)、YDF-170(東都化成社製)、830、835、N-730A(DIC社製)などのビスフェノールF型エポキシ樹脂、ZX-1059(東都化成社製)などのビスフェノールAとビスフェノールFの混合物、YX-8000、8034(ジャパンエポキシレジン社製)ST-3000(東都化成社製)などの水添ビスフェノールA型エポキシ樹脂、日本化薬社製のRE-306CA90、ダウケミカル社製のDEN431、DEN438等のノボラック型エポキシ樹脂などが挙げられる。 [(B) Polyfunctional epoxy resin having a softening point of 60 ° C. or lower]
In the composition of the present invention, a photosensitive resin (A), a photopolymerization initiator (C), and a polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower (hereinafter also referred to as “epoxy resin (B)”). By combining these, the sensitivity of the composition can be increased, and the composition is cured well. Moreover, by containing an epoxy resin (B), there is no residue after image development and developability is improved. Here, the softening point means a value measured according to the method described in JIS K 7234. The polyfunctional epoxy resin (B) having a softening point of 60 ° C. or lower may be a known one, but is preferably liquid at room temperature of 20 to 30 ° C., for example. Examples of such polyfunctional epoxy resins include bisphenol A such as Epicoat 834 and 828 (manufactured by Japan Epoxy Resin), YD-128 (manufactured by Tohto Kasei Co., Ltd.), 840 and 850 (manufactured by DIC). Type epoxy resin, 806, 807 (manufactured by Japan Epoxy Resin Co., Ltd.), YDF-170 (manufactured by Tohto Kasei Co., Ltd.), 830, 835, N-730A (manufactured by DIC Co., Ltd.), ZX-1059 (Toto A mixture of bisphenol A and bisphenol F such as YX-8000, 8034 (manufactured by Japan Epoxy Resin) ST-3000 (manufactured by Toto Kasei), such as Nippon Kayaku Co., Ltd. Novolaks such as RE-306CA90 of DEN431, DEN431 and DEN438 manufactured by Dow Chemical Type epoxy resin.
本発明の組成物は、光重合開始剤(C)を含有する。光重合開始剤(C)としては、ベンゾフェノン系、アセトフェノン系、アミノアセトフェノン系、ベンゾインエーテル系、ベンジルケタール系、アシルホスフィンオキシド系、オキシムエーテル系、オキシムエステル系、チタノセン系などの公知慣用の化合物が挙げられる。 [(C) Photopolymerization initiator]
The composition of the present invention contains a photopolymerization initiator (C). As the photopolymerization initiator (C), known and commonly used compounds such as benzophenone, acetophenone, aminoacetophenone, benzoin ether, benzyl ketal, acylphosphine oxide, oxime ether, oxime ester, and titanocene are used. Can be mentioned.
R1及びR2により表されるシクロアルキル基としては、炭素数5~8のシクロアルキル基が好ましい。
R1及びR2により表されるアルカノイル基としては、炭素数2~20のアルカノイル基が好ましい。
R1及びR2により表されるベンゾイル基は、置換基を有していてもよく、該置換基としては、例えば、炭素数が1~6のアルキル基、フェニル基等が挙げられる。 The alkyl group represented by R 1 and R 2 is preferably an alkyl group having 1 to 20 carbon atoms, and may contain one or more oxygen atoms in the alkyl chain. Further, it may be substituted with one or more hydroxyl groups.
The cycloalkyl group represented by R 1 and R 2 is preferably a cycloalkyl group having 5 to 8 carbon atoms.
The alkanoyl group represented by R 1 and R 2 is preferably an alkanoyl group having 2 to 20 carbon atoms.
The benzoyl group represented by R 1 and R 2 may have a substituent, and examples of the substituent include an alkyl group having 1 to 6 carbon atoms and a phenyl group.
R23は、水素原子、アルキル基、アルコキシ基、フェニル基、ナフチル基を表す。 R21、R22はそれぞれ独立に、水素原子、アルキル基、アルコキシ基、ハロゲン基、フェニル基、ナフチル基、アンスリル基、ピリジル基、ベンゾフリル基、ベンゾチエニル基を表す。
Arは、単結合、又は、炭素数1~10のアルキレン基、ビニレン基、フェニレン基、ビフェニレン基、ピリジレン基、ナフチレン基、アントリレン基、チエニレン基、フリレン基、2,5-ピロール-ジイル基、4,4’-スチルベン-ジイル基、4,2’-スチレン-ジイル基を表す。
nは0~1の整数を表す。 In general formula (I-3),
R 23 represents a hydrogen atom, an alkyl group, an alkoxy group, a phenyl group, or a naphthyl group. R 21 and R 22 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, a halogen group, a phenyl group, a naphthyl group, an anthryl group, a pyridyl group, a benzofuryl group, or a benzothienyl group.
Ar is a single bond or an alkylene group having 1 to 10 carbon atoms, vinylene group, phenylene group, biphenylene group, pyridylene group, naphthylene group, anthrylene group, thienylene group, furylene group, 2,5-pyrrole-diyl group, It represents a 4,4′-stilbene-diyl group or a 4,2′-styrene-diyl group.
n represents an integer of 0 to 1.
R23により表されるフェニル基は、置換基を有していてもよく、該置換基としては、例えば、アルキル基(好ましくは炭素数1~17)、アルコキシ基(好ましくは炭素数1~8)、アミノ基、アルキルアミノ基(好ましくはアルキル基の炭素数1~8)またはジアルキルアミノ基(好ましくはアルキル基の炭素数1~8)等が挙げられる。 The alkoxy group represented by R 23 is preferably an alkoxy group having 1 to 8 carbon atoms.
The phenyl group represented by R 23 may have a substituent. Examples of the substituent include an alkyl group (preferably having 1 to 17 carbon atoms) and an alkoxy group (preferably having 1 to 8 carbon atoms). ), An amino group, an alkylamino group (preferably an alkyl group having 1 to 8 carbon atoms) or a dialkylamino group (preferably an alkyl group having 1 to 8 carbon atoms).
R21及びR22により表されるアルコキシ基としては、炭素数1~8のアルコキシ基が好ましい。
R21及びR22により表されるフェニル基は、置換基を有していてもよく、該置換基としては、例えば、アルキル基(好ましくは炭素数1~17)、アルコキシ基(好ましくは炭素数1~8)、アミノ基、アルキルアミノ基(好ましくはアルキル基の炭素数1~8)またはジアルキルアミノ基(好ましくはアルキル基の炭素数1~8)等が挙げられる。 The alkyl group represented by R 21 and R 22 is preferably an alkyl group having 1 to 17 carbon atoms.
The alkoxy group represented by R 21 and R 22 is preferably an alkoxy group having 1 to 8 carbon atoms.
The phenyl group represented by R 21 and R 22 may have a substituent. Examples of the substituent include an alkyl group (preferably having 1 to 17 carbon atoms) and an alkoxy group (preferably having a carbon number). 1-8), an amino group, an alkylamino group (preferably an alkyl group having 1 to 8 carbon atoms) or a dialkylamino group (preferably an alkyl group having 1 to 8 carbon atoms).
本発明の組成物は、(D)脂環式骨格を有するカルボキシル基含有アクリル共重合体(以下、「カルボキシル基含有アクリル共重合体(D)」などという)を含有していてもよい。カルボキシル基含有アクリル共重合体(D)は、主鎖あるいは側鎖に少なくとも1種類の脂環式骨格を有する樹脂である。カルボキシル基含有アクリル共重合体(D)としては、公知のものを使用することができる。
カルボキシル基含有アクリル共重合体(D)としては、例えば、以下のものが挙げられる。
(1)カルボキシル基含有(メタ)アクリル共重合体に、1分子中にエポキシ基とラジカル重合性不飽和基を有する脂環式化合物を反応させて得られる共重合体、
(2)1分子中にエポキシ基と不飽和二重結合を有する脂環式化合物と不飽和二重結合を有する化合物との共重合体に不飽和モノカルボン酸を反応させ、この反応により生成したエポキシカルボキシレートの第2級の水酸基に飽和または不飽和多塩基酸無水物を反応させて得られる感光性樹脂、
(3)水酸基含有ポリマーに飽和または不飽和多塩基酸無水物を反応させた後、この反応により生成したカルボン酸に、1分子中にそれぞれ1 個のエポキシ基とラジカル重合性不飽和二重結合を有する脂環式化合物を反応させて得られる感光性樹脂。 [(D) A carboxyl group-containing acrylic copolymer having an alicyclic skeleton]
The composition of the present invention may contain (D) a carboxyl group-containing acrylic copolymer (hereinafter referred to as “carboxyl group-containing acrylic copolymer (D)”) having an alicyclic skeleton. The carboxyl group-containing acrylic copolymer (D) is a resin having at least one alicyclic skeleton in the main chain or side chain. A well-known thing can be used as a carboxyl group-containing acrylic copolymer (D).
Examples of the carboxyl group-containing acrylic copolymer (D) include the following.
(1) a copolymer obtained by reacting a carboxyl group-containing (meth) acrylic copolymer with an alicyclic compound having an epoxy group and a radically polymerizable unsaturated group in one molecule;
(2) An unsaturated monocarboxylic acid was reacted with a copolymer of an alicyclic compound having an epoxy group and an unsaturated double bond in one molecule and a compound having an unsaturated double bond, and produced by this reaction. A photosensitive resin obtained by reacting a secondary hydroxyl group of an epoxy carboxylate with a saturated or unsaturated polybasic acid anhydride,
(3) After reacting a hydroxyl group-containing polymer with a saturated or unsaturated polybasic acid anhydride, the carboxylic acid produced by this reaction has one epoxy group and one radically polymerizable unsaturated double bond in each molecule. The photosensitive resin obtained by making the alicyclic compound which has this react.
本発明の光硬化性熱硬化性樹脂組成物は、光硬化性モノマーを含有していてもよい。 光硬化性モノマーとしては、分子中に2個以上のエチレン性不飽和基を有する化合物が好ましく、該化合物は、紫外線照射により光硬化して、前記カルボン酸樹脂(A)を、アルカリ水溶液に不溶化、又は不溶化を助けるものである。このような化合物としては、エチレングリコール、メトキシテトラエチレングリコール、ポリエチレングリコール、プロピレングリコールなどのグリコールのジアクリレート類;ヘキサンジオール、トリメチロールプロパン、ペンタエリスリトール、ジペンタエリスリトール、トリス-ヒドロキシエチルイソシアヌレートなどの多価アルコール又はこれらのエチレオキサイド付加物もしくはプロピレンオキサイド付加物などの多価アクリレート類;フェノキシアクリレート、ビスフェノールAジアクリレート、及びこれらのフェノール類のエチレンオキサイド付加物もしくはプロピレンオキサイド付加物などの多価アクリレート類;グリセリンジグリシジルエーテル、グリセリントリグリシジルエーテル、トリメチロールプロパントリグリシジルエーテル、トリグリシジルイソシアヌレートなどのグリシジルエーテルの多価アクリレート類;及びメラミンアクリレート、及び/又は上記アクリレートに対応する各メタクリレート類などが挙げられる。 [Photocurable monomer]
The photocurable thermosetting resin composition of the present invention may contain a photocurable monomer. As the photocurable monomer, a compound having two or more ethylenically unsaturated groups in the molecule is preferable, and the compound is photocured by ultraviolet irradiation to insolubilize the carboxylic acid resin (A) in an alkaline aqueous solution. Or it helps insolubilization. Examples of such compounds include glycol diacrylates such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, and propylene glycol; hexanediol, trimethylolpropane, pentaerythritol, dipentaerythritol, tris-hydroxyethyl isocyanurate, and the like. Polyhydric acrylates such as polyhydric alcohols or their ethylene oxide adducts or propylene oxide adducts; Phenoxy acrylate, bisphenol A diacrylate, and polyhydric acrylates such as ethylene oxide adducts or propylene oxide adducts of these phenols Glycerin diglycidyl ether, glycerin triglycidyl ether, trimethylolpropane triglycy Ethers, polyvalent acrylates of glycidyl ethers such as triglycidyl isocyanurate; and melamine acrylate, and / or the like each methacrylates corresponding to the acrylates.
本発明の光硬化性熱硬化性樹脂組成物は、熱硬化触媒を含有していてもよい。
そのような熱硬化触媒としては、例えば、イミダゾール、2-メチルイミダゾール、2-エチルイミダゾール、2-エチル-4-メチルイミダゾール、2-フェニルイミダゾール、4-フェニルイミダゾール、1-シアノエチル-2-フェニルイミダゾール、1-(2-シアノエチル)-2-エチル-4-メチルイミダゾール等のイミダゾール誘導体;ジシアンジアミド、ベンジルジメチルアミン、4-(ジメチルアミノ)-N,N-ジメチルベンジルアミン、4-メトキシ-N,N-ジメチルベンジルアミン、4-メチル-N,N-ジメチルベンジルアミン等のアミン化合物、アジピン酸ヒドラジド、セバシン酸ヒドラジド等のヒドラジン化合物;トリフェニルホスフィン等のリン化合物など、また市販されているものとしては、例えば四国化成工業社製の2MZ-A、2MZ-OK、2PHZ、2P4BHZ、2P4MHZ(いずれもイミダゾール系化合物の商品名)、サンアプロ社製のU-CAT3503N、U-CAT3502T(いずれもジメチルアミンのブロックイソシアネート化合物の商品名)、DBU、DBN、U-CATSA102、U-CAT5002(いずれも二環式アミジン化合物及びその塩)などがある。特に、これらに限られるものではなく、エポキシ樹脂の熱硬化触媒、もしくはエポキシ基とカルボキシル基の反応を促進するものであればよく、単独で又は2種以上を混合して使用してもかまわない。また、密着性付与剤としても機能するグアナミン、アセトグアナミン、ベンゾグアナミン、メラミン、2,4-ジアミノ-6-メタクリロイルオキシエチル-S-トリアジン、2-ビニル-4,6-ジアミノ-S-トリアジン、2-ビニル-4,6-ジアミノ-S-トリアジン・イソシアヌル酸付加物、2,4-ジアミノ-6-メタクリロイルオキシエチル-S-トリアジン・イソシアヌル酸付加物等のS-トリアジン誘導体を用いることもでき、好ましくはこれら密着性付与剤としても機能する化合物を前記熱硬化触媒と併用する。 [Thermosetting catalyst]
The photocurable thermosetting resin composition of the present invention may contain a thermosetting catalyst.
Examples of such thermosetting catalysts include imidazole, 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 4-phenylimidazole, 1-cyanoethyl-2-phenylimidazole. Imidazole derivatives such as 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole; dicyandiamide, benzyldimethylamine, 4- (dimethylamino) -N, N-dimethylbenzylamine, 4-methoxy-N, N -Amine compounds such as dimethylbenzylamine and 4-methyl-N, N-dimethylbenzylamine, hydrazine compounds such as adipic hydrazide and sebacic acid hydrazide; phosphorus compounds such as triphenylphosphine, , For example, four 2MZ-A, 2MZ-OK, 2PHZ, 2P4BHZ, 2P4MHZ (all trade names of imidazole compounds) manufactured by Kasei Kogyo Co., Ltd., U-CAT3503N, U-CAT3502T (all are dimethylamine block isocyanate compounds) Product name), DBU, DBN, U-CATSA102, U-CAT5002 (both bicyclic amidine compounds and salts thereof). In particular, the present invention is not limited to these, and any epoxy resin thermosetting catalyst or any one that promotes the reaction between the epoxy group and the carboxyl group may be used alone or in admixture of two or more. . Guanamine, acetoguanamine, benzoguanamine, melamine, 2,4-diamino-6-methacryloyloxyethyl-S-triazine, 2-vinyl-4,6-diamino-S-triazine, which also functions as an adhesion-imparting agent, S-triazine derivatives such as -vinyl-4,6-diamino-S-triazine / isocyanuric acid adduct, 2,4-diamino-6-methacryloyloxyethyl-S-triazine / isocyanuric acid adduct can also be used, Preferably, a compound that also functions as an adhesion promoter is used in combination with the thermosetting catalyst.
本発明の光硬化性熱硬化性樹脂組成物は、塗膜の物理的強度等を上げるために、必要に応じて、フィラーを配合することができる。このようなフィラーとしては、公知慣用の無機又は有機フィラーが使用できるが、特に硫酸バリウム、球状シリカおよびタルクが好ましく用いられる。さらに、前述の光硬化性モノマーや(C)エポキシ系熱硬化性樹脂にナノシリカを分散したHanse-Chemie社製のNANOCRYL(商品名) XP 0396、XP 0596、XP 0733、XP 0746、XP 0765、XP 0768、XP 0953、XP 0954、XP 1045(何れも製品グレード名)や、Hanse-Chemie社製のNANOPOX(商品名) XP 0516、XP 0525、XP 0314(何れも製品グレード名)も使用できる。これらを単独で又は2種以上配合することができる。 [Filler]
The photocurable thermosetting resin composition of the present invention can contain a filler as necessary in order to increase the physical strength of the coating film. As such a filler, known and commonly used inorganic or organic fillers can be used. In particular, barium sulfate, spherical silica and talc are preferably used. Furthermore, NANOCRYL (trade names) XP 0396, XP 0596, XP 0733, XP 0746, XP 0765, XP manufactured by Hanse-Chemie, in which nano silica is dispersed in the above-mentioned photo-curable monomer or (C) epoxy-based thermosetting resin. 0768, XP 0953, XP 0954, XP 1045 (all product grade names) and NANOOX (trade name) XP 0516, XP 0525, XP 0314 (all product grade names) manufactured by Hanse-Chemie can also be used. These may be used alone or in combination of two or more.
本発明の光硬化性熱硬化性樹脂組成物は、塗布方法に適した粘度に調整するために、有機溶剤を含有していてもよい。
このような有機溶剤としては、ケトン類、芳香族炭化水素類、グリコールエーテル類、グリコールエーテルアセテート類、エステル類、アルコール類、脂肪族炭化水素、石油系溶剤などが挙げることができる。より具体的には、メチルエチルケトン、シクロヘキサノン等のケトン類;トルエン、キシレン、テトラメチルベンゼン等の芳香族炭化水素類;セロソルブ、メチルセロソルブ、ブチルセロソルブ、カルビトール、メチルカルビトール、ブチルカルビトール、プロピレングリコールモノメチルエーテル、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールジエチルエーテル、トリエチレングリコールモノエチルエーテル等のグリコールエーテル類;酢酸エチル、酢酸ブチル、ジプロピレングリコールメチルエーテルアセテート、プロピレングリコールメチルエーテルアセテート、プロピレングリコールエチルエーテルアセテート、プロピレングリコールブチルエーテルアセテート、カルビトールアセテートなどのエステル類;エタノール、プロパノール、エチレングリコール、プロピレングリコール等のアルコール類;オクタン、デカン等の脂肪族炭化水素;石油エーテル、石油ナフサ、水添石油ナフサ、ソルベントナフサ等の芳香族石油系溶剤などである。
このような有機溶剤は、単独で又は2種以上の混合物として用いられる。 [solvent]
The photocurable thermosetting resin composition of the present invention may contain an organic solvent in order to adjust to a viscosity suitable for the coating method.
Examples of such organic solvents include ketones, aromatic hydrocarbons, glycol ethers, glycol ether acetates, esters, alcohols, aliphatic hydrocarbons, petroleum solvents, and the like. More specifically, ketones such as methyl ethyl ketone and cyclohexanone; aromatic hydrocarbons such as toluene, xylene and tetramethylbenzene; cellosolve, methyl cellosolve, butyl cellosolve, carbitol, methyl carbitol, butyl carbitol, propylene glycol monomethyl Glycol ethers such as ether, dipropylene glycol monomethyl ether, dipropylene glycol diethyl ether, triethylene glycol monoethyl ether; ethyl acetate, butyl acetate, dipropylene glycol methyl ether acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate , Esters such as propylene glycol butyl ether acetate and carbitol acetate Ethanol, propanol, ethylene glycol, alcohols such as propylene glycol; octane, aliphatic hydrocarbons decane; petroleum ether is petroleum naphtha, hydrogenated petroleum naphtha, and aromatic petroleum solvents such as solvent naphtha.
Such organic solvents are used alone or as a mixture of two or more.
本発明の光硬化性熱硬化性樹脂組成物は、さらに必要に応じて、ハイドロキノン、ハイドロキノンモノメチルエーテル、t-ブチルカテコール、ピロガロール、フェノチアジンなどの公知慣用の熱重合禁止剤、微粉シリカ、有機ベントナイト、モンモリロナイトなどの公知慣用の増粘剤、シリコーン系、フッ素系、高分子系などの消泡剤及び/又はレベリング剤、イミダゾール系、チアゾール系、トリアゾール系等のシランカップリング剤、青、黄、赤、黒、白色の着色剤などのような公知慣用の添加剤類を配合することができる。 [Other ingredients]
The photocurable thermosetting resin composition of the present invention may further comprise a known and commonly used thermal polymerization inhibitor such as hydroquinone, hydroquinone monomethyl ether, t-butylcatechol, pyrogallol, phenothiazine, fine silica, organic bentonite, Known and commonly used thickeners such as montmorillonite, defoamers and / or leveling agents such as silicone, fluorine and polymer, silane coupling agents such as imidazole, thiazole and triazole, blue, yellow and red Known additives such as black and white colorants can be blended.
プリント配線板は、回路パターンを有する基材上に、光硬化性熱硬化性組成物からなる硬化物を有する。このようなプリント配線板は以下の方法により製造できる。 [Manufacture of printed wiring boards]
A printed wiring board has the hardened | cured material which consists of a photocurable thermosetting composition on the base material which has a circuit pattern. Such a printed wiring board can be manufactured by the following method.
合成例1:感光性樹脂(A1-1)
ジエチレングリコールモノエチルエーテルアセテート600gにオルソクレゾールノボラック型エポキシ樹脂〔DIC株式会社製、EPICLON N-695、軟化点95℃、エポキシ当量214、平均官能基数7.6〕1070g(グリシジル基数(芳香環総数):5.0モル)、アクリル酸360g(5.0モル)、およびハイドロキノン1.5gを仕込み、100℃に加熱攪拌し、均一溶解した。 [Synthesis of photosensitive resin]
Synthesis Example 1: Photosensitive resin (A1-1)
Orthocresol novolac type epoxy resin (produced by DIC Corporation, EPICLON N-695, softening point 95 ° C., epoxy equivalent 214, average functional group number 7.6) 1070 g (number of glycidyl groups (total number of aromatic rings)): 600 g of diethylene glycol monoethyl ether acetate 5.0 mol), 360 g (5.0 mol) of acrylic acid, and 1.5 g of hydroquinone were charged, heated and stirred at 100 ° C., and uniformly dissolved.
ジエチレングリコールモノエチルエーテルアセテート700gにオルソクレゾールノボラック型エポキシ樹脂〔DIC株式会社製、EPICLON N-695、軟化点95℃、エポキシ当量214、平均官能基数7.6〕1070g(グリシジル基数(芳香環総数):5.0モル)、アクリル酸360g(5.0モル)、およびハイドロキノン1.5gを仕込み、100℃に加熱攪拌し、均一溶解した。 Synthesis Example 2: Photosensitive resin (A-1)
700 g of diethylene glycol monoethyl ether acetate and 1070 g of orthocresol novolac type epoxy resin (manufactured by DIC Corporation, EPICLON N-695, softening point 95 ° C., epoxy equivalent 214, average functional group number 7.6): number of glycidyl groups (total number of aromatic rings): 5.0 mol), 360 g (5.0 mol) of acrylic acid, and 1.5 g of hydroquinone were charged, heated and stirred at 100 ° C., and uniformly dissolved.
表1に示す配合成分と、下記共通成分を3本ロールミルで混練し、光硬化性熱硬化性樹脂組成物を得た。なお、表1において、(A)、(B)及び(D)の各成分の含有量は、溶剤を除いた固形分である。
The blending components shown in Table 1 and the following common components were kneaded with a three-roll mill to obtain a photocurable thermosetting resin composition. In Table 1, the content of each component (A), (B) and (D) is a solid content excluding the solvent.
A-2:SP-3900(昭和電工社製、固形分65%、酸価:70mgKOH/g) <多官能エポキシ樹脂>
B-1:ビスフェノールA型エポキシ樹脂(834:ジャパンエポキシレジン社製、エポキシ当量250、常温半固形、軟化点60℃以下、分子量470)
B-2:フェノールノボラックのポリグリシジルエーテル(RE306CA90:日本化薬社製、エポキシ当量196、軟化点50℃、分子量400)
B-3:フェノールノボラック型エポキシ樹脂(DEN431:ダウケミカル社製、エポキシ当量174、常温半固形、軟化点60℃以下、分子量400)
B-4:フェノールノボラック型エポキシ樹脂(DEN438:ダウケミカル社製、エポキシ当量199、軟化点40℃、分子量600)
B-5:ビスフェノールAノボラック型エポキシ樹脂(エピクロンN-870:DIC社製、エポキシ当量205、軟化点70℃、分子量1600)
B-6:ICTEP-S(日産化学社製、エポキシ当量100、軟化点110℃)
<(C)光重合開始剤>
C-1:2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)-ブタン-1-オン
C-2:
A-2: SP-3900 (manufactured by Showa Denko KK, solid content 65%, acid value: 70 mg KOH / g) <Polyfunctional epoxy resin>
B-1: Bisphenol A type epoxy resin (834: manufactured by Japan Epoxy Resin Co., Ltd., epoxy equivalent 250, normal temperature semi-solid, softening point 60 ° C. or lower, molecular weight 470)
B-2: Polyglycidyl ether of phenol novolac (RE306CA90: Nippon Kayaku Co., Ltd., epoxy equivalent 196, softening point 50 ° C., molecular weight 400)
B-3: Phenol novolac type epoxy resin (DEN431: manufactured by Dow Chemical Company, epoxy equivalent 174, normal temperature semi-solid, softening point 60 ° C. or lower, molecular weight 400)
B-4: Phenol novolac type epoxy resin (DEN438: manufactured by Dow Chemical Company, epoxy equivalent 199, softening point 40 ° C., molecular weight 600)
B-5: Bisphenol A novolak type epoxy resin (Epiclon N-870: DIC, epoxy equivalent 205, softening point 70 ° C., molecular weight 1600)
B-6: ICTEP-S (Nissan Chemical Co., Ltd., epoxy equivalent 100, softening point 110 ° C.)
<(C) Photopolymerization initiator>
C-1: 2-Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one C-2:
D-1:サイクロマーP(ACA)Z250(ダイセル化学工業(株)社製、固形分45%)(脂環式骨格を有するカルボキシル基含有アクリル共重合体)
D-2:サイクロマーP(ACA)Z320(ダイセル化学工業(株)社製、固形分40%)(脂環式骨格を有するカルボキシル基含有アクリル共重合体)
D-3:VB-5301、スチレン共重合(三菱レイヨン(株)社製、固形分50%)(脂環式骨格を有さない共重合体)
[共通成分(数値は質量部数)]
(フィラー)
硫酸バリウム(堺化学社製B-30):100部
タルク:10部
シリカ:10部
(光硬化性モノマー)
ジペンタエリスリトールヘキサアクリレート:30部
(熱硬化触媒)
ジシアンジアミド:0.3部
メラミン:3部
(消泡剤、着色剤、溶剤)
シリコーン系消泡剤:3部
フタロシアニンブルー:2部
芳香族石油系溶剤:10部
[実施例1~18、比較例1,2の評価方法]
<感度:硬化性>
スクラブ研磨後、水洗し、乾燥させた銅厚35μmの回路パターン基板に、上掲で調製した光硬化性熱硬化性樹脂組成物を、スクリーン印刷法により全面印刷し、80℃の熱風循環式乾燥炉で30分間乾燥させた。これにより、光硬化性熱硬化性樹脂組成物の乾燥塗膜を得た。この乾燥塗膜は、厚さが15μmで、吸光度が0.8であった。 <(D) Carboxyl group-containing acrylic copolymer>
D-1: Cyclomer P (ACA) Z250 (manufactured by Daicel Chemical Industries, Ltd., solid content 45%) (carboxyl group-containing acrylic copolymer having an alicyclic skeleton)
D-2: Cyclomer P (ACA) Z320 (manufactured by Daicel Chemical Industries, Ltd., solid content: 40%) (carboxyl group-containing acrylic copolymer having an alicyclic skeleton)
D-3: VB-5301, styrene copolymer (manufactured by Mitsubishi Rayon Co., Ltd., solid content 50%) (copolymer having no alicyclic skeleton)
[Common components (numbers are parts by mass)]
(Filler)
Barium sulfate (B-30 manufactured by Sakai Chemical Co., Ltd.): 100 parts Talc: 10 parts Silica: 10 parts (photo-curable monomer)
Dipentaerythritol hexaacrylate: 30 parts (thermosetting catalyst)
Dicyandiamide: 0.3 part Melamine: 3 parts (Antifoaming agent, coloring agent, solvent)
Silicone antifoaming agent: 3 parts Phthalocyanine blue: 2 parts Aromatic petroleum solvent: 10 parts [Evaluation methods of Examples 1 to 18 and Comparative Examples 1 and 2]
<Sensitivity: Curability>
After the scrubbing, the photocurable thermosetting resin composition prepared above is printed on the entire surface of the circuit pattern substrate having a thickness of 35 μm, which is washed with water and dried, by screen printing, and then dried at 80 ° C. with hot air circulation. Dry in an oven for 30 minutes. Thereby, the dry coating film of the photocurable thermosetting resin composition was obtained. This dried coating film had a thickness of 15 μm and an absorbance of 0.8.
スクラブ研磨後、水洗し、乾燥させた銅厚35μmの回路パターン基板に、スクリーン印刷により、上掲で調製した光硬化性熱硬化性樹脂組成物を全面塗布した。基板を80℃の熱風循環式乾燥炉に入れて乾燥させた際に熱被りによる現像不良が起こらない最長時間を調べた。具体的には、80℃で30、40、50、60分間乾燥し、前述の現像条件で現像を行い、それぞれの時間での現像の可否を試験した。この時、銅上を目視し、光硬化性熱硬化性樹脂組成物の成分が残渣として残っていなければ現像可とし、この時間を記載した。これを乾燥管理幅と言い、乾燥時間が長いほど、生産性が良いということになる。 <Maximum development life: Ease of residue generation>
After scrubbing, the photocurable thermosetting resin composition prepared above was applied onto the entire surface of a circuit pattern substrate having a thickness of 35 μm which was washed with water and dried by screen printing. When the substrate was put into an 80 ° C. hot air circulation drying oven and dried, the longest time during which development failure due to heat covering did not occur was examined. Specifically, drying was performed at 80 ° C. for 30, 40, 50, and 60 minutes, development was performed under the above-described development conditions, and whether or not development was possible at each time was tested. At this time, the surface of copper was visually observed, and development was possible if the components of the photocurable thermosetting resin composition did not remain as a residue, and this time was described. This is called the drying control width, and the longer the drying time, the better the productivity.
スクラブ研磨後、水洗し、乾燥させた銅厚35μmの回路パターン基板に、スクリーン印刷により、上掲で調製した光硬化性熱硬化性樹脂組成物を全面塗布した。基板を80℃の熱風循環式乾燥炉に入れて40分間乾燥させた。乾燥後、乾燥塗膜にネガパターンのフィルム(ネガフィルム)を載せ、メタルハライドランプ搭載の露光装置を用いて露光した。具体的には、ネガフィルム下の乾燥塗膜に対して、積算露光量が50mJ/cm2になるように照射することにより硬化膜を得た。硬化膜からネガフィルムを剥がした際、ネガフィルム跡の有無を確認した。ネガフィルム跡が無い場合、乾燥塗膜の指触乾燥性がよいということになる。一方、硬化膜にネガフィルム跡が有る場合、乾燥塗膜の指触乾燥性が悪いということになる。 <Dry touch dryness>
After scrubbing, the photocurable thermosetting resin composition prepared above was applied onto the entire surface of a circuit pattern substrate having a thickness of 35 μm which was washed with water and dried by screen printing. The substrate was placed in a hot air circulation drying oven at 80 ° C. and dried for 40 minutes. After drying, a negative pattern film (negative film) was placed on the dried coating film and exposed using an exposure apparatus equipped with a metal halide lamp. Specifically, a cured film was obtained by irradiating the dry coating film under the negative film so that the integrated exposure amount was 50 mJ / cm 2 . When the negative film was peeled off from the cured film, the presence or absence of negative film marks was confirmed. When there is no negative film mark, it means that the dry touch of the dried coating film is good. On the other hand, when there is a negative film mark on the cured film, the dry touch of the dried coating film is poor.
△:ネガフィルム跡あり
×:ネガフィルムに密着して、乾燥塗膜ごと剥がれる。 ◯: No negative film trace Δ: Negative film trace ×: Adhered to the negative film and peeled off with the dry coating film.
スクラブ研磨後、水洗し、乾燥させた銅厚35μmの回路パターン基板に、上掲で調製した光硬化性熱硬化性樹脂組成物を、スクリーン印刷法により全面印刷し、80℃の熱風循環式乾燥炉で30分間乾燥させた。これにより、光硬化性熱硬化性樹脂組成物の乾燥塗膜を得た。 <Heat resistance>
After the scrubbing, the photocurable thermosetting resin composition prepared above is printed on the entire surface of the circuit pattern substrate having a thickness of 35 μm, which is washed with water and dried, by screen printing, and then dried at 80 ° C. with hot air circulation. Dry in an oven for 30 minutes. Thereby, the dry coating film of the photocurable thermosetting resin composition was obtained.
△:10秒間浸漬後において、レジスト層が白化する
×:10秒間浸漬後において、レジスト層が膨れ、剥がれる
<絶縁信頼性>
スクラブ研磨後、水洗し、乾燥させたライン/スペース=100/100のクシ型電極パターンで銅厚が18μmの基板に、上掲で調製した光硬化性熱硬化性樹脂組成物を、スクリーン印刷法により全面印刷し、80℃の熱風循環式乾燥炉で30分間乾燥させ、これにより、光硬化性熱硬化性樹脂組成物の乾燥塗膜を得た。 ○: No peeling is observed after immersion for 10 seconds. Δ: The resist layer is whitened after immersion for 10 seconds. ×: The resist layer swells and peels after immersion for 10 seconds. <Insulation reliability>
After the scrubbing, the photocurable thermosetting resin composition prepared above was screen-printed on a substrate having a comb-type electrode pattern of line / space = 100/100 washed with water and dried and having a copper thickness of 18 μm. Was printed on the entire surface and dried in a hot air circulating drying oven at 80 ° C. for 30 minutes, thereby obtaining a dry coating film of the photocurable thermosetting resin composition.
表2の記載の組成物を用い、メタルハライドランプ搭載の露光装置を、405nmの単独レーザー搭載の露光装置に変えた以外は、実施例1と同様に評価した。結果を同表に示す。
Evaluation was performed in the same manner as in Example 1 except that the exposure apparatus mounted with a metal halide lamp was changed to an exposure apparatus mounted with a single laser of 405 nm using the composition described in Table 2. The results are shown in the same table.
Claims (5)
- (A)多官能エポキシ樹脂とラジカル重合性不飽和モノカルボン酸を反応させて、側鎖に水酸基を有するエポキシカルボキシレートを生成し、このエポキシカルボキシレートと多塩基酸無水物を反応させて、カルボキシル基含有感光性樹脂(A1)を生成し、このカルボキシル基含有感光性樹脂(A1)と、エポキシ基とラジカル重合性不飽和基を有する化合物を反応させて得られるカルボキシル基含有感光性樹脂、
(B)軟化点60℃以下の多官能エポキシ樹脂、及び、
(C)光重合開始剤
を含有することを特徴とする光硬化性熱硬化性樹脂組成物。 (A) A polyfunctional epoxy resin and a radically polymerizable unsaturated monocarboxylic acid are reacted to form an epoxy carboxylate having a hydroxyl group in the side chain, and this epoxy carboxylate is reacted with a polybasic acid anhydride to produce a carboxyl. A carboxyl group-containing photosensitive resin obtained by producing a group-containing photosensitive resin (A1) and reacting the carboxyl group-containing photosensitive resin (A1) with a compound having an epoxy group and a radically polymerizable unsaturated group,
(B) a polyfunctional epoxy resin having a softening point of 60 ° C. or lower, and
(C) A photocurable thermosetting resin composition comprising a photopolymerization initiator. - さらに、(D)脂環式骨格を有するカルボキシル基含有アクリル共重合体を含有することを特徴とする請求項1に記載の光硬化性熱硬化性樹脂組成物。 The photocurable thermosetting resin composition according to claim 1, further comprising (D) a carboxyl group-containing acrylic copolymer having an alicyclic skeleton.
- さらに、軟化点が60℃を超える多官能エポキシ樹脂(B’)を含有し、前記軟化点60℃以下の多官能エポキシ樹脂(B)のエポキシ基(B1)と前記軟化点60℃超の多官能エポキシ樹脂(B')のエポキシ基(B’1)との比が、3:7~9:1であることを特徴とする請求項1に記載の光硬化性熱硬化性樹脂組成物。 Furthermore, it contains a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C., the epoxy group (B1) of the polyfunctional epoxy resin (B) having a softening point of 60 ° C. or less, and a polyfunctional epoxy resin (B ′) having a softening point exceeding 60 ° C. The photocurable thermosetting resin composition according to claim 1, wherein the ratio of the functional epoxy resin (B ') to the epoxy group (B'1) is from 3: 7 to 9: 1.
- 請求項1~3のいずれか一項に記載の光硬化性熱硬化性樹脂組成物からなることを特徴とする硬化物。 A cured product comprising the photocurable thermosetting resin composition according to any one of claims 1 to 3.
- 請求項3に記載の硬化物を有することを特徴とするプリント配線板。 A printed wiring board comprising the cured product according to claim 3.
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JP2017506361A (en) * | 2014-01-27 | 2017-03-02 | 太陽油墨(蘇州)有限公司Taiyo Ink(Suzhou)Co.,Ltd. | Alkali development type photosensitive resin composition, dry film and cured product, and printed wiring board |
CN104865794A (en) * | 2014-02-20 | 2015-08-26 | 上海飞凯光电材料股份有限公司 | Photoresist |
WO2016042415A3 (en) * | 2014-09-17 | 2016-05-26 | 日本ゼオン株式会社 | Curable resin composition, curable resin molded article, cured product, laminate, complex, and multi-layer printed circuit board |
JP2015106160A (en) * | 2015-01-19 | 2015-06-08 | 太陽インキ製造株式会社 | Photosensitive resin composition, dry film, cured product, and printed wiring board |
JP5941180B1 (en) * | 2015-03-20 | 2016-06-29 | 太陽インキ製造株式会社 | Curable resin composition, dry film, cured product and printed wiring board |
WO2017208865A1 (en) * | 2016-05-31 | 2017-12-07 | 昭和電工株式会社 | Method for producing polyurethane, epoxy carboxylate composition, polyurethane, and polyurethane resin composition |
US11203659B2 (en) | 2016-05-31 | 2021-12-21 | Showa Denko K. K. | Method for producing polyurethane, epoxy carboxylate composition, polyurethane, and polyurethane resin composition |
CN113281965A (en) * | 2020-02-20 | 2021-08-20 | 东友精细化工有限公司 | Curable resin composition, pattern, and image display device |
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JPWO2013162015A1 (en) | 2015-12-24 |
JP5690973B2 (en) | 2015-03-25 |
CN104115066B (en) | 2019-04-26 |
KR20150005907A (en) | 2015-01-15 |
CN104115066A (en) | 2014-10-22 |
KR102056819B1 (en) | 2019-12-17 |
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