WO2010050272A1 - 感光性樹脂組成物及びそれに用いる感光性樹脂の製造方法 - Google Patents
感光性樹脂組成物及びそれに用いる感光性樹脂の製造方法 Download PDFInfo
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- WO2010050272A1 WO2010050272A1 PCT/JP2009/062446 JP2009062446W WO2010050272A1 WO 2010050272 A1 WO2010050272 A1 WO 2010050272A1 JP 2009062446 W JP2009062446 W JP 2009062446W WO 2010050272 A1 WO2010050272 A1 WO 2010050272A1
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- photosensitive resin
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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
- C08G59/18—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
- C08G59/68—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 catalysts used
- C08G59/681—Metal alcoholates, phenolates or carboxylates
- C08G59/685—Carboxylates
-
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
- C08F283/105—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule on to unsaturated polymers containing more than one epoxy radical per molecule
-
- 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
- C08F290/02—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
- C08F290/064—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
- C08G59/14—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
-
- 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
- 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
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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
- 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
Definitions
- the present invention relates to a photosensitive resin composition. More specifically, the present invention relates to a photosensitive resin composition that does not contain a chromium compound, is highly sensitive to ultraviolet exposure, has a good physical property, and can be developed with a dilute alkali.
- the present invention relates to a conductive resin composition.
- a liquid solder photoresist ink of a dilute alkali development type has been widely used.
- a dilute alkali development type photosensitive resin for example, an acid pendant type epoxy acrylate resin obtained by reacting an acid anhydride with a hydroxyl group of an epoxy acrylate resin is known.
- chromium naphthenate has been used as a synthesis catalyst for such an acid pendant type epoxy acrylate resin in order to obtain good thermal stability and development control width.
- Patent Document 1 is obtained by using an organophosphorus compound as a synthesis catalyst, reacting a polyfunctional epoxy resin with an unsaturated monobasic acid under predetermined conditions, and further reacting with an acid anhydride. Photosensitive resins have been proposed.
- the photosensitive resin described in Patent Document 1 balances performances such as sensitivity, thermal stability, development control width, heat resistance, and solvent resistance as required for recent solder resist inks at a high level. There is still room for improvement. Therefore, the present invention does not contain a chromium compound, can be developed with ultraviolet exposure and dilute alkaline aqueous solution, has high sensitivity, has good thermal stability and development control width, and has excellent coating performance. It aims at providing the photosensitive resin composition suitable as a soldering resist ink to show.
- a polyfunctional epoxy compound and an unsaturated compound are present in the presence of a trivalent organophosphorus compound and at least one of zirconium naphthenate and zirconium octylate.
- a photosensitive resin obtained by reacting a monoepoxy compound having an unsaturated double bond with a carboxyl group generated by reacting with a monobasic acid and further reacting with a polybasic acid anhydride and a water-soluble monoepoxy compound. It has been found that the blended photosensitive resin composition meets the above-mentioned purpose, and the present invention has been completed.
- the present invention comprises (A) a reaction between a polyfunctional epoxy compound and an unsaturated monobasic acid in the presence of a trivalent organophosphorus compound and at least one of zirconium naphthenate and zirconium octylate, Photosensitive resin obtained by reacting a monoepoxy compound having an unsaturated double bond with a carboxyl group produced by reacting a basic acid anhydride and a water-soluble monoepoxy compound, (B) epoxy resin, (C) light A photosensitive resin composition comprising a polymerization initiator and (D) a reactive diluent.
- the present invention also includes a first step of reacting a polyfunctional epoxy compound with an unsaturated monobasic acid in the presence of a trivalent organophosphorus compound and at least one of zirconium naphthenate and zirconium octylate, The second step of reacting the polybasic acid anhydride with the product obtained in one step, the monoepoxy compound having an unsaturated double bond and the water-soluble monoepoxy compound reacting with the product obtained in the second step And a third step of producing a photosensitive resin.
- the present invention does not contain a chromium compound, can be developed with ultraviolet light exposure and dilute alkaline aqueous solution, is highly sensitive, has good thermal stability and development control width, and has excellent coating performance.
- a photosensitive resin composition suitable as the solder resist ink shown can be provided.
- the component (A) in the photosensitive resin composition of the present invention comprises a polyfunctional epoxy compound, an unsaturated monobasic acid, in the presence of a trivalent organic phosphorus compound and at least one of zirconium naphthenate and zirconium octylate.
- a photosensitive resin obtained by reacting a polyepoxy anhydride with a monoepoxy compound having an unsaturated double bond and a water-soluble monoepoxy compound.
- the physical properties of the component (A) of the present invention are greatly influenced by the catalyst used in the synthesis, and the development management width tends to be influenced by the catalyst. Further, when catalysts having different characteristics are used in combination, the respective disadvantages tend to appear, but the present inventors have used a trivalent organophosphorus compound in combination with at least one of zirconium naphthenate and zirconium octylate. Contrary to expectations, the inventors have found that physical properties equivalent to those obtained when a chromium-based catalyst is used can be obtained.
- the amount of the catalyst used is preferably a total amount of trivalent organophosphorus compound and at least one of zirconium naphthenate and zirconium octylate with respect to 100 parts by mass of the total amount of polyfunctional epoxy resin and unsaturated monobasic acid.
- the amount is from 1.2 parts by mass to 6.0 parts by mass.
- at least one of zirconium naphthenate and zirconium octylate is preferably used at least 4 times, more preferably 4 to 6 times, the trivalent organophosphorus compound on a mass basis.
- the total amount of the trivalent organic phosphorus compound and at least one of zirconium naphthenate and zirconium octylate is too small, or the amount of at least one of zirconium naphthenate and zirconium octylate used is four times that of the trivalent organic phosphorus compound. If it is less than 1, it may not function sufficiently as a reaction catalyst. On the other hand, when the amount of the trivalent organophosphorus compound is too large, the thermal stability of the resulting photosensitive resin tends to decrease, and the amount used is too high even if at least one of zirconium naphthenate and zirconium octylate is excessive. It is not economical because there is no effect commensurate with.
- the polyfunctional epoxy compound used in the present invention is not particularly limited.
- bisphenol A type, bisphenol F type, phenol novolac type, cresol novolak type, bisphenol A novolak type, cycloaliphatic epoxy resin, heterocyclic ring examples thereof include epoxy resins such as molds and those in which halogen atoms such as bromine atoms and chlorine atoms are introduced.
- a cresol novolac type epoxy resin is particularly preferable.
- the unsaturated monobasic acid used in the present invention may be a monobasic acid having one carboxyl group and one or more polymerizable unsaturated groups, such as acrylic acid, methacrylic acid, crotonic acid, Cinnamic acid, sorbitan acid, acrylic acid dimer and the like can be mentioned.
- acrylic acid is preferable from the viewpoint of obtaining high active energy photocurability.
- These unsaturated monobasic acids may be used individually by 1 type, and may be used in combination of 2 or more type.
- These unsaturated monobasic acids are preferably reacted at 0.8 equivalents to 1.1 equivalents with respect to 1.0 equivalent of the epoxy group of the polyfunctional epoxy compound. If the ratio of unsaturated monobasic acid is less than 0.8 equivalent, storage stability may be deteriorated, and problems such as gelation may occur during synthesis. It tends to occur or heat resistance decreases.
- polybasic acid anhydride used in the present invention examples include maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, endomethylenetetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride.
- dibasic acid anhydrides such as acid and chlorendic anhydride
- polybasic acid anhydrides such as trimellitic anhydride, pyromellitic anhydride, benzophenonetetracarboxylic anhydride, and biphenyltetracarboxylic anhydride.
- tetrahydrophthalic anhydride or hexahydrophthalic anhydride is particularly preferred from the viewpoint of excellent electrolytic corrosion properties.
- the amount of these polybasic acid anhydrides used is 0.4 mol to 0.9 mol with respect to 1.0 mol of hydroxyl group of the product obtained by reacting the polyfunctional epoxy compound and unsaturated monobasic acid. It is preferable that the reaction be performed at a ratio of 0.6 mol to 0.9 mol. If the amount of polybasic acid anhydride used is less than 0.4 mol, sufficient alkali developability may not be obtained. On the other hand, if it exceeds 0.9 mol, the electrical properties of the cured coating will deteriorate. Tend to.
- Examples of the monoepoxy compound having an unsaturated double bond used in the present invention include alicyclic epoxy groups such as glycidyl methacrylate, glycidyl acrylate, Daicel Chemical Industries, Ltd. Cyclomer A200 and M100 (meth). An acrylate is mentioned.
- R 1 represents an alkyl group or an aryl group
- R 2 represents polyethylene oxide or polypropylene oxide having 3 or more repeating units.
- a monoepoxy compound having an unsaturated double bond that binds to a carboxyl group derived from a polybasic acid anhydride is bonded to the outermost part of the resin, and therefore has a high steric reactivity when irradiated with ultraviolet light. It has high photosensitivity.
- the water-soluble monoepoxy compound improves the affinity of the resin for alkali, further moderately suppresses the mobility of the unsaturated double bond of the monoepoxy compound having an unsaturated double bond, and preserves the resin during storage. Of stability.
- the amount of the monoepoxy compound having an unsaturated double bond and the water-soluble monoepoxy compound to be reacted with the carboxyl group produced by the reaction of the polybasic acid anhydride depends on the sensitivity, developability and electrical characteristics of the resulting photosensitive resin. Considering this, it is preferable to react at a ratio of 0.15 mol to 0.25 mol in total with respect to 1 mol of the generated carboxyl group.
- the amount of the water-soluble monoepoxy compound is preferably a ratio of less than 0.03 mol, and a ratio of 0.01 mol to 0.025 mol, with respect to 1 mol of the generated carboxyl group. More preferably.
- the effect of increasing sensitivity which is one of the objects of the present invention, tends to be insufficient.
- the alkali developability tends to decrease.
- the amount of the water-soluble monoepoxy compound is 0.03 mol or more, the effect is low, which is not realistic from the viewpoint of the alkali developability described above.
- Examples of the epoxy resin as the component (B) in the photosensitive resin composition of the present invention include bisphenol A type epoxy resin, bisphenol F type epoxy resin, hydrogenated bisphenol A type epoxy resin, phenol novolac type epoxy resin, and cresol novolak type epoxy.
- the compounding amount of these epoxy resins is preferably 3 to 100 parts by mass, more preferably 6 to 75 parts by mass with respect to 100 parts by mass of the photosensitive resin.
- the blending amount of the epoxy resin is less than 3 parts by mass, the carboxyl group in the photosensitive resin is less than the amount that substantially reacts, so that the water resistance, alkali resistance, and electrical characteristics tend to decrease,
- the amount exceeds 100 parts by mass a linear polymer having an unreacted epoxy group is generated, and thus heat resistance and solvent resistance may be insufficient.
- an epoxy curing agent in order to further improve the adhesion, chemical resistance, heat resistance, etc. of the epoxy resin.
- epoxy curing agents include imidazole derivatives, phenol derivatives, dicyandiamide, dicyandiamide derivatives, melamine, melamine resins, hydrazide derivatives, amines, acid anhydrides, and the like. These epoxy curing agents may be used individually by 1 type, and may be used in combination of 2 or more type.
- the compounding amount of the epoxy curing agent is preferably such that the amount of active hydrogen in the curing agent is 0.5 mol to 1.2 mol with respect to 1 mol of the epoxy group of the epoxy resin.
- Examples of the photopolymerization initiator (C) in the photosensitive resin composition of the present invention include benzoin such as benzoin, benzoin methyl ether, benzoin isopropyl ether, benzoin isobutyl ether and derivatives thereof, benzyl such as benzyl and benzyldimethyl ketal.
- photoinitiators may be used individually by 1 type, and may be used in combination of 2 or more type. Furthermore, it is known that the effect of initiating photopolymerization is promoted by using various amine compounds in combination with these photoinitiators, if necessary, and can also be used in combination in the present invention.
- the blending amount of these photopolymerization initiators is preferably 0.1 to 20 parts by mass, more preferably 1 to 10 parts by mass with respect to 100 parts by mass of the photosensitive resin.
- the blending amount of the photopolymerization initiator is less than 0.1 parts by mass, the effect as the photopolymerization initiator may not be sufficiently obtained. On the other hand, even if it exceeds 20 parts by mass, the effect commensurate with the blending amount It is not economical.
- the reactive diluent which is the component (D) in the photosensitive resin composition of the present invention is intended to improve the curability to active energy rays and / or the coating properties when the photosensitive resin composition is used as a resist ink. It is what is used in.
- active energy light-curing monomers are preferable, and 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, N-pyrrolidone, N-acryloylmorpholine, N, N-dimethylacrylamide, N, N-diethylacrylamide, N, N-dimethylaminoethyl acrylate, N, N-dimethylaminopropyl acrylate, methoxypolyethylene glycol acrylate, ethoxypolyethylene glycol acrylate, melamine acrylate, phenoxyethyl acrylate, phenoxypropyl acrylate, ethylene glycol diacrylate, di Propylene glycol diacrylate, polydipropylene glycol diacrylate, trimethylolpropane triacrylate, Pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate,
- the compounding amount of the reactive diluent is preferably 5 parts by mass to 200 parts by mass, and more preferably 10 parts by mass to 100 parts by mass with respect to 100 parts by mass of the photosensitive resin.
- the compounding amount of the reactive diluent is less than 5 parts by mass, sufficient photosensitivity may not be obtained.
- the photosensitive resin composition is used as a resist ink. In some cases, the viscosity becomes too low and the resistance as a cured coating film becomes insufficient.
- a solvent can be used together with a reactive diluent to adjust the coatability.
- solvents include ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, aromatic hydrocarbons such as toluene and xylene, carbitols such as ethyl cellosolve, butyl cellosolve, carbitol, butyl carbitol, ethyl acetate, acetic acid Examples include butyl, cellosolve acetate, butyl cellosolve acetate, and ethyl carbitol acetate. These solvents may be used alone or in combination of two or more.
- the photosensitive resin composition of the present invention is used as a liquid resist ink, in addition to the above components (A) to (D), if necessary, silica, calcium carbonate, barium sulfate, clay, talc Inorganic fillers such as phthalocyanine green, phthalocyanine blue, titanium oxide and carbon black, various additives such as antifoaming agents and leveling agents, hydroquinone, resorcinol, catechol, pyroganol, hydroquinone monomethyl ether, t-butylcatechol A polymerization inhibitor such as phenothiazine can be added.
- silica such as phthalocyanine green, phthalocyanine blue, titanium oxide and carbon black
- various additives such as antifoaming agents and leveling agents, hydroquinone, resorcinol, catechol, pyroganol, hydroquinone monomethyl ether, t-butylcatechol
- a polymerization inhibitor such as phenothia
- a polyfunctional epoxy compound and an unsaturated monobasic acid are reacted by a known method in the presence of a trivalent organophosphorus compound and at least one of zirconium naphthenate and zirconium octylate.
- this reaction is preferably performed while adding a known polymerization inhibitor such as hydroquinone or methylhydroquinone into the system or blowing air into the system from the viewpoint of preventing thermal polymerization during the reaction.
- the reaction temperature in the first step is preferably 60 ° C. to 150 ° C., and the reaction time is preferably 5 hours to 20 hours.
- the polyfunctional epoxy compound When the polyfunctional epoxy compound is liquid, it can be reacted without solvent, but when the polyfunctional epoxy compound is solid, it is preferably reacted in a solvent.
- the solvent used here include ketones such as methyl ethyl ketone and cyclohexanone, aromatic hydrocarbons such as toluene and xylene, glycol ethers such as dipropylene glycol dimethyl ether, ethyl acetate, butyl cellosolve acetate, carbitol acetate, and ethyl.
- esters such as carbitol acetate, butyl carbitol acetate, and dipropylene glycol monomethyl ether acetate
- petroleum solvents such as petroleum ether, petroleum naphtha, and solvent naphtha.
- the product obtained in the first step is reacted with a polybasic acid anhydride by a known method.
- the reaction temperature in the second step is preferably 80 ° C. to 120 ° C., and the reaction time is preferably 1 hour to 6 hours.
- the product obtained in the second step is reacted with a monoepoxy compound having an unsaturated double bond and a water-soluble monoepoxy compound by a known method.
- the reaction temperature in the third step is preferably 60 to 150 ° C., and the reaction time is preferably 0.5 to 20 hours.
- reaction product epoxy acrylate
- metal content 3% a reaction product having an acid value of 1.0 mgKOH / g.
- the above photosensitive resin composition is applied to a surface-treated printed wiring board by a screen printing method so as to have a thickness of 30 ⁇ m to 40 ⁇ m, preliminarily dried at 80 ° C. for 20 minutes, cooled to room temperature, and dried.
- a membrane was obtained.
- This coating film was exposed at 250 mJ / cm 2 using an ultra high pressure mercury lamp exposure apparatus manufactured by Oak Seisakusho, and then heated at 150 ° C. for 30 minutes using a hot air dryer to obtain a cured coating film.
- various physical-property evaluation was performed according to the evaluation test method shown below. These results are shown in Table 2.
- a step tablet for sensitivity measurement (21 stages of Kodak) is installed on the dried coating film after preliminary drying, exposed at 250 mJ / cm 2 using an ultra high pressure mercury lamp exposure device manufactured by Oak Manufacturing Co., Ltd., and sprayed using a 1% aqueous sodium carbonate solution. After developing for 60 seconds at a pressure of 2.0 kgf / mm 2 , the number of unexposed portions of the exposed portion was measured. The greater the number of steps in the portion that is not removed, the higher the sensitivity.
- ⁇ Development management width> Using a dry coating film whose pre-drying time was changed to 20 minutes, 40 minutes, 60 minutes or 80 minutes, using a 1% aqueous sodium carbonate solution and developing at a spray pressure of 2.0 kgf / mm 2 , The presence or absence was observed and evaluated according to the following criteria. The development management width is better as development is possible even if the drying time is longer. ⁇ : No coating film visually after 60 seconds of development time. (Triangle
- ⁇ Solder heat resistance> In accordance with JIS C6481, the cured coating is floated so that the entire surface is immersed in solder, floated three times in a 260 ° C. solder bath for 10 seconds, taken out, and then observed for the state of the coating such as swelling or peeling. The evaluation was based on the following criteria. ⁇ : No change in appearance. X: Appearance changed.
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Abstract
Description
従って、本発明は、クロム化合物を含まず、紫外線露光及び希アルカリ水溶液による現像が可能であって、高感度であり、しかも熱安定性及び現像管理幅が良好で、塗膜が優れた性能を示すソルダーレジストインクとして好適な感光性樹脂組成物を提供することを目的とするものである。
すなわち、本発明は、(A)三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを反応させ、更に多塩基酸無水物を反応させることにより生成したカルボキシル基に不飽和二重結合を有するモノエポキシ化合物及び水溶性モノエポキシ化合物を反応させて得られる感光性樹脂、(B)エポキシ樹脂、(C)光重合開始剤並びに(D)反応性希釈剤を含有することを特徴とする感光性樹脂組成物である。
また、本発明は、三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを反応させる第一工程と、第一工程で得られた生成物に多塩基酸無水物を反応させる第二工程と、第二工程で得られた生成物に不飽和二重結合を有するモノエポキシ化合物及び水溶性モノエポキシ化合物を反応させる第三工程とを含むことを特徴とする感光性樹脂の製造方法である。
まず、本発明の感光性樹脂組成物について説明する。
本発明の感光性樹脂組成物における(A)成分は、三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを反応させ、更に多塩基酸無水物を反応させ、これにより生成したカルボキシル基に不飽和二重結合を有するモノエポキシ化合物及び水溶性モノエポキシ化合物を反応させて得られる感光性樹脂である。
で表される化合物(例えば、ナガセケムテックス株式会社製デナコール(登録商標)EX-145、EX-171等)、下記式(II)
第一工程では、三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを公知の方法で反応させる。また、この反応は、反応時の熱重合を防ぐという点から、ハイドロキノン、メチルハイドロキノンなどの公知の重合禁止剤を系内に添加したり、系内に空気を吹き込みながら行うことが好ましい。
第一工程における反応温度は、好ましくは60℃~150℃であり、反応時間は、好ましくは5時間~20時間である。多官能エポキシ化合物が液状の場合、無溶剤で反応させることが可能であるが、多官能エポキシ化合物が固形の場合、溶剤中で反応させることが好ましい。ここで使用する溶剤としては、例えば、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、キシレン等の芳香族炭化水素類、ジプロピレングリコールジメチルエーテル等のグリコールエーテル類、酢酸エチル、ブチルセロソルブアセテート、カルビトールアセテート、エチルカルビトールアセテート、ブチルカルビトールアセテート、ジプロピレングリコールモノメチルエーテルアセテート等のエステル類、石油エーテル、石油ナフサ、ソルベントナフサ等の石油系溶剤が挙げられる。
攪拌機、気体導入管及び還流管を備えたフラスコ内に、エチルカルビトールアセテート192質量部を仕込み、そこにクレゾールノボラック型エポキシ樹脂(東都化成株式会社製エポトート(登録商標)YDCN704、エポキシ当量206)206質量部(1当量)を溶解させた。更に、アクリル酸72質量部(1.0モル)、ハイドロキノン0.23質量部、トリフェニルホスフィン0.4質量部及びナフテン酸ジルコニウム(金属含有量6質量%)2質量部を仕込み、液面下部の気体導入管から空気を吹き込みながら130℃で10時間反応を続け、酸価0.5mgKOH/gの反応物(エポキシアクリレート)を得た。これにテトラヒドロ無水フタル酸111.03質量部(0.73モル)を加え、120℃で更に2時間反応させ、固形分酸価105.3mgKOH/gの反応物を得た。これにグリシジルメタクリレート22.72質量部(0.16モル)及びデナコール(登録商標)EX-145(ナガセケムテックス株式会社製、エポキシ当量450)9質量部(0.02モル)を加え、120℃で更に3時間反応させ、更に不揮発分が60%になるようにエチルカルビトールアセテートを追加し、固形分酸価73.4mgKOH/gの感光性樹脂Aを得た。
ナフテン酸ジルコニウム(金属含有量6質量%)2質量部の代わりにオクチル酸ジルコニウム(金属含有量12質量)2質量部を用いる以外は、合成例1と同様の操作を行い、感光性樹脂Bを得た。
攪拌機、気体導入管及び還流管を備えたフラスコ内に、エチルカルビトールアセテート192質量部を仕込み、そこにクレゾールノボラック型エポキシ樹脂(東都化成株式会社製エポトート(登録商標)YDCN704、エポキシ当量206)206質量部(1当量)を溶解させた。更に、アクリル酸72質量部(1.0モル)、2、6-ジ-t-ブチル-4-メトキシフェノール2.17質量部、トリフェニルホスフィン0.415質量部を仕込み、液面下部の気体導入管から空気を吹き込みながら130℃で10時間反応を続け、酸価1.0mgKOH/gの反応物(エポキシアクリレート)を得た。これにテトラヒドロ無水フタル酸111.03質量部(0.73モル)及びナフテン酸リチウム(金属含有量3%)0.707質量部を加え、120℃で更に2時間反応させ、固形分酸価105.3mgKOH/gの反応物を得た。これにグリシジルメタクリレート22.72質量部(0.16モル)及びデナコール(登録商標)EX-145(ナガセケムテックス株式会社製、エポキシ当量450)9質量部(0.02モル)を加え、120℃で更に3時間反応させ、更に不揮発分が60%になるようにエチルカルビトールアセテートを追加し、固形分酸価73.4mgKOH/gの感光性樹脂Cを得た。
予備乾燥後の乾燥塗膜に感度測定用ステップタブレット(コダック21段)を設置し、オーク製作所製超高圧水銀灯露光装置を用いて250mJ/cm2で露光し、1%炭酸ナトリウム水溶液を用い、スプレー圧2.0kgf/mm2で60秒間現像を行なった後の露光部分の除去されない部分の段数を測定した。除去されない部分の段数が大きいほど高感度である。
予備乾燥時間を20分、40分、60分又は80分に変更した乾燥塗膜を用い、1%炭酸ナトリウム水溶液を用い、スプレー圧2.0kgf/mm2で現像を行い現像後の塗膜の有無を観察し、下記の基準で評価した。乾燥時間が長くても現像可能なものほど現像管理幅が良好である。
○:現像時間60秒後、目視で塗膜無し。
△:現像時間120秒後、目視で塗膜無し。
×:現像時間120秒後、目視で残膜有り。
硬化塗膜を、JIS C6481に準じて、全面が半田に浸かるように浮かべ、260℃の半田浴に10秒間、3回浮かせ、取り出した後、膨れ又は剥れなどの塗膜の状態を観察し、下記の基準で評価した。
○:外観変化無し。
×:外観変化有り。
硬化塗膜を塩化メチレンに30分浸せきした後の塗膜状態を評価した。
○:外観変化なし
△:外観わずかに変化あり
×:塗膜が剥離したもの
感光性樹脂A~Cそれぞれの樹脂固形分100質量部に対して、トリメチロールプロパントリアクリレート10質量部を加えて十分混合し、試験管に入れ、120℃で流動性がなくなるまでの時間をゲル化時間として評価した。結果を表3に示した。
Claims (5)
- (A)三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを反応させ、更に多塩基酸無水物を反応させることにより生成したカルボキシル基に不飽和二重結合を有するモノエポキシ化合物及び水溶性モノエポキシ化合物を反応させて得られる感光性樹脂、(B)エポキシ樹脂、(C)光重合開始剤並びに(D)反応性希釈剤を含有することを特徴とする感光性樹脂組成物。
- 前記感光性樹脂が、前記カルボキシル基1モルに対して、前記不飽和二重結合を有するモノエポキシ化合物及び前記水溶性モノエポキシ化合物を総量で0.15モル~0.25モル(但し、水溶性モノエポキシ化合物は0.03モル未満)反応させて得られたものであることを特徴とする請求項1に記載の感光性樹脂組成物。
- 前記ナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種を、質量基準で、三価の有機リン化合物の少なくとも4倍使用することを特徴とする請求項1又は2に記載の感光性樹脂組成物。
- 三価の有機リン化合物とナフテン酸ジルコニウム及びオクチル酸ジルコニウムの少なくとも1種との存在下で、多官能エポキシ化合物と不飽和一塩基酸とを反応させる第一工程と、
第一工程で得られた生成物に多塩基酸無水物を反応させる第二工程と、
第二工程で得られた生成物に不飽和二重結合を有するモノエポキシ化合物及び水溶性モノエポキシ化合物を反応させる第三工程と
を含むことを特徴とする感光性樹脂の製造方法。 - 空気を吹き込みながら前記第一工程における反応を行うことを特徴とする請求項4に記載の感光性樹脂の製造方法。
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