WO2020031958A1 - 感光性樹脂組成物、感光性シート、ならびにそれらの硬化膜およびその製造方法、電子部品 - Google Patents
感光性樹脂組成物、感光性シート、ならびにそれらの硬化膜およびその製造方法、電子部品 Download PDFInfo
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- WO2020031958A1 WO2020031958A1 PCT/JP2019/030727 JP2019030727W WO2020031958A1 WO 2020031958 A1 WO2020031958 A1 WO 2020031958A1 JP 2019030727 W JP2019030727 W JP 2019030727W WO 2020031958 A1 WO2020031958 A1 WO 2020031958A1
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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
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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
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/029—Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/031—Organic compounds not covered by group G03F7/029
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0387—Polyamides or polyimides
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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
- G03F7/075—Silicon-containing compounds
- G03F7/0757—Macromolecular compounds containing Si-O, Si-C or Si-N bonds
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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
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/168—Finishing the coated layer, e.g. drying, baking, soaking
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
Definitions
- amide polycondensation reaction examples thereof include a method of reacting a tetracarboxylic acid diester with an diamine and then reacting with a diamine, a method of using a carbodiimide-based dehydrating condensing agent, and a method of reacting with a diamine after activated esterification.
- alcohols When reacting the acid anhydride with the alcohol having an ethylenically unsaturated bond, other alcohols may be used at the same time. Other alcohols can be appropriately selected according to various purposes such as adjustment of exposure sensitivity and adjustment of solubility in an organic solvent.
- the resin (A) may have a main chain terminal sealed with a terminal sealing agent.
- the terminal blocking agent include a monoamine, an acid anhydride, a monocarboxylic acid, a monoacid chloride compound, and a monoactive ester compound.
- a monoalcohol can also be used as a terminal blocking agent.
- the terminal blocking agent introduced into the resin (A) used in the present invention can be easily detected by the following method.
- a resin having a terminal blocking agent introduced therein is dissolved in an acidic solution and decomposed into an amine component and an acid anhydride component, which are structural units, and then subjected to gas chromatography (GC) or NMR measurement, whereby The terminal blocking agent used in the present invention can be easily detected.
- the GC measurement is performed simultaneously with the external standard substance whose peak does not overlap with each component, and the integrated value of each peak of the chromatogram is compared with the external standard substance, whereby the mole of each monomer including the terminal blocking agent is measured. The ratio can be estimated.
- the polyimide of the resin (A) can be obtained by partially dehydrating and cyclizing the polyimide precursor by heat treatment or chemical treatment with an acid or a base. More specifically, heat treatment may be performed by adding a solvent azeotropic with water such as m-xylene, or heat treatment may be performed at a low temperature of 100 ° C. or less by adding a weakly acidic carboxylic acid compound. .
- the ring closing catalyst used in the above chemical treatment include a dehydrating condensing agent such as carboxylic anhydride or dicyclohexylcarbodiimide, and a base such as triethylamine. Further, it can be obtained by polymerizing an amine compound or a carboxylic acid compound containing an imide group as a residue as a monomer.
- polybenzoxazole precursor of the resin (A) examples include polyhydroxyamide, polyaminoamide, a copolymer with polyamide or polyamideimide, and polyhydroxyamide is preferred.
- the polyhydroxyamide having a dicarboxylic acid residue and a bisaminophenol residue can be obtained by reacting a bisaminophenol with a dicarboxylic acid or a corresponding dicarboxylic acid chloride or dicarboxylic acid active ester.
- hydrophilic group examples include a carboxyl group, a carboxylic anhydride group, a sulfonic acid group, a phenolic hydroxyl group, and a hydroxyimide group. You may have these two or more types. Among these, a carboxyl group and a carboxylic anhydride group are preferable, and a carboxylic anhydride group is more preferable, from the viewpoint of further suppressing the development residue and further improving the storage stability.
- organosilane compound other than the organosilane compound having a hydrophilic group and a styryl group examples include, for example, methyltrimethoxysilane, methyltriethoxysilane, methyltri (methoxyethoxy) silane, methyltripropoxysilane, methyltriisopropoxysilane , Methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, hexyltrimethoxysilane, octadecyltrimethoxysilane, octadecyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N- ( 2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-chloropropyltrimethoxysilane, 3- (N
- an acid catalyst such as hydrochloric acid, acetic acid, formic acid, nitric acid, oxalic acid, hydrochloric acid, sulfuric acid, phosphoric acid, polyphosphoric acid, polycarboxylic acid or anhydride thereof, or ion exchange resin can be used.
- an acidic aqueous solution containing formic acid, acetic acid and / or phosphoric acid is preferable.
- the resin (A) in the present invention preferably has a weight average molecular weight of 5,000 to 100,000.
- a weight average molecular weight By setting the weight average molecular weight to 5,000 or more in terms of polystyrene by GPC (gel permeation chromatography), mechanical properties such as elongation after curing, strength at break, and elastic modulus can be improved.
- the weight average molecular weight is 100,000 or less, developability can be improved. In order to obtain mechanical properties, 20,000 or more is more preferable.
- the weight average molecular weight of at least one of the resins may be in the above range.
- R 1 to R 7 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, an aryl group having 6 to 50 carbon atoms or a carbon atom having 7 or more carbon atoms. Represents up to 50 arylalkyl groups, and Z - represents a carboxylate or borate anion.
- the aryl group having 6 to 50 carbon atoms may be monocyclic or condensed polycyclic, and specific examples include a phenyl group, a naphthyl group, an anthracenyl group, and a phenanthrenyl group.
- the organic groups represented by R 1 to R 7 when they are other than a hydrogen atom, they may be substituted.
- substituent of the alkyl group having 1 to 50 carbon atoms include an amino group, a nitro group, an epoxy group, an alkoxycarbonyl group, a vinyl group, a (meth) acryl group, an ethynyl group, a coumarinylcarbonyl group, an anthraquinonyl group, a xanthonyl group and And thioxanthonyl groups.
- the epoxy group include a glycidyl group and a 2,3-cyclohexyl epoxyethyl group.
- Z ⁇ represents a carboxylate or borate anion.
- the carboxylate to give Z ⁇ include formic acid, acetic acid, propionic acid, butanoic acid, valeric acid, pivalic acid, caproic acid, aliphatic carboxylic acid compounds such as enanthic acid, caprylic acid, pelargonic acid, capric acid, and benzoic acid.
- Carboxylates derived from aromatic carboxylic acid compounds such as 4-benzoylbenzoic acid, salicylic acid, cinnamic acid and 4-biphenylcarboxylic acid are mentioned.
- carboxylate represented by the general formula (2) and the general formula (3) are exemplified, and are preferable from the viewpoint of storage stability of the photosensitive resin composition of the present invention.
- R 8 to R 16 each independently represent a hydrogen atom, a halogen atom, a nitro group or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, It represents an aryl group, an arylalkyl group having 7 to 50 carbon atoms or an alkoxy group having 1 to 50 carbon atoms.
- alkyl group having 1 to 50 carbon atoms represented by R 8 to R 16 in the general formula (2) and R 17 to R 25 in the general formula (3) a linear, branched or cyclic alkyl group may be used. Specific examples thereof include those exemplified for the alkyl group having 1 to 50 carbon atoms represented by R 1 to R 7 in the general formula (1) described above. The same applies to the substituent when substituted. Examples of the aryl group having 6 to 50 carbon atoms and the arylalkyl group having 7 to 15 carbon atoms include those exemplified in the description of R 1 to R 7 in the general formula (1). The same applies to.
- the alkoxy group having 1 to 50 carbon atoms includes, for example, methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, isobutoxy group, sec-butoxy group, tert-butoxy group, cyclobutoxy group, n -Pentyloxy, isopentyloxy, sec-pentyloxy, tert-pentyloxy, neopentyloxy, 2-methylbutoxy, 1,2-dimethylpropoxy, 1-ethylpropoxy, cyclopentyloxy , N-hexyloxy group, isohexyloxy group, sec-hexyloxy group, tert-hexyloxy group, neohexyloxy group, 2-methylpentyloxy group, 1,2-dimethylbutoxy group, 2,3-dimethylbutoxy Group, 1-ethylbutoxy group, cyclohexyloxy group, etc. And the like. Examples of
- R 26 to R 29 each represent a hydrogen atom, a halogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, an alkoxy group having 1 to 50 carbon atoms, 50 alkenyl group, C 2-50 alkynyl group, C 6-50 aryl group, C 7-50 arylalkyl group, C 7-50 arylalkynyl group, furanyl group, thienyl group or pyrrolyl Represents a group.
- Examples of the arylalkynyl group having 7 to 50 carbon atoms include a phenylethynyl group, a 3-phenylpropynyl group, a 4-phenylbutynyl group, a 5-phenylpentynyl group, and a 6-phenylhexynyl group.
- the pyrrolyl group may be N-substituted, for example, N-methylpyrrolyl group, N-ethylpyrrolyl group, Nn-propylpyrrolyl group, N-isopropylpyrrolyl group, Nn-butylpyrrolyl group, N-isobutylpyrrolyl group , N-sec-butylpyrrolyl, N-tert-butylpyrrolyl, N-cyclobutylpyrrolyl, Nn-pentylpyrrolyl, N-isopentylpyrrolyl, N-sec-pentylpyrrolyl, N -Tert-pentylpyrrolyl group, N-neopentylpyrrolyl group, N-cyclopentylpyrrolyl group, Nn-hexylpyrrolyl group, N-isohexylpyrrolyl group, N-sec-hexylpyrrolyl group, N -
- R 30 is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, an alkoxy group having 1 to 50 carbon atoms, an alkenyl group having 2 to 50 carbon atoms
- R 31 to R 33 represent an alkynyl group having 50, an aryl group having 6 to 50 carbon atoms, an arylalkyl group having 7 to 50 carbon atoms, an arylalkynyl group having 7 to 15 carbon atoms, a furanyl group, a thienyl group or a pyrrolyl group; Represents an aryl group having 6 to 50 carbon atoms.
- Specific examples of the component (B) include any combination of the above specific examples of the biguanide cation and the specific examples of the carboxylate anion or the borate anion.
- Other specific examples include 1,5,7-triazabicyclo [4.4.0] dec-5-ene acetate and 1,5,7-triazabicyclo [4.4.0] decaphosphate.
- Examples of the quinonediazide compound include a polyhydroxy compound in which sulfonic acid of quinonediazide is ester-bonded, a polyamino compound in which sulfonic acid of quinonediazide is sulfonamide-bonded, and a polyhydroxypolyamino compound in which sulfonic acid of quinonediazide is ester-bonded and / or sulfonamide. And the like. All the functional groups of the polyhydroxy compound, polyamino compound and polyhydroxypolyamino compound may not be substituted with quinonediazide, but it is preferable that 40 mol% or more of the entire functional groups are substituted with quinonediazide on average.
- Polyhydroxy compounds include Bis-Z, BisP-EZ, TekP-4HBPA, TrisP-HAP, TrisP-PA, TrisP-SA, TrisOCR-PA, BisOCHP-Z, BisP-MZ, BisP-PZ, BisP-IPZ, BisOCP -IPZ, BisP-CP, BisRS-2P, BisRS-3P, BisP-OCHP, Methylenetris-FR-CR, BisRS-26X, DML-MBPC, DML-MBOC, DML-OCHP, DML-PCHP, DML-PC DML-PTBP, DML-34X, DML-EP, DML-POP, Dimethylol-BisOC-P, DML-PFP, DML-PSBP, DML-MTrisPC, TriML-P, TriML-35XL, TML-BP, TML-H , TML-pp-BPF, TML-BPA, TMOM-BP, HML-TPPHBA, HML-TPHAP (all
- the onium salt can function as a photocuring agent for an epoxy resin.
- an onium salt for the epoxy resin a negative pattern can be obtained.
- the onium salt include an aromatic iodonium complex salt and an aromatic sulfonium complex salt.
- Trifluorophosphate (manufactured by San Apro Co., Ltd., trade name: CPI-210S), 4- ⁇ 4- (2-chlorobenzoyl) phenylthio ⁇ phenylbis (4-fluorophenyl) sulfonium hexafluoroantimonate (manufactured by Asahi Denka Kogyo Co., Ltd.) (Trade name: SP-172), a mixture of aromatic sulfonium hexafluoroantimonate containing 4- (phenylthio) phenyldiphenylsulfonium hexafluoroantimonate (manufactured by Dow Chemical Company) (Trade name: UVI-6976) and triphenylsulfonium tris (trifluoromethanesulfonyl) methanide (manufactured by BASF Japan, trade name: CGI TPS C1), tris [4- (4-acetylpheny
- the photo-radical polymerization initiator (c-2) is not particularly limited as long as it is a compound capable of generating a radical upon exposure to light. And benzoate compounds are preferred because of their excellent sensitivity, stability and ease of synthesis. Among them, alkylphenone compounds and oxime ester compounds are preferable from the viewpoint of sensitivity, and oxime ester compounds are particularly preferable. When the processed film has a thickness of 5 ⁇ m or more, a phosphine oxide compound is preferable from the viewpoint of resolution. (C-2) By containing the photo-radical polymerization initiator, a negative pattern can be obtained.
- aminobenzophenone compound examples include 4,4-bis (dimethylamino) benzophenone and 4,4-bis (diethylamino) benzophenone.
- Benzyl is mentioned as a diketone compound.
- ketoester compound examples include methyl benzoylformate and ethyl benzoylformate.
- photo-radical polymerization initiator (c-2) include benzophenone, 4-benzoyl-4′-methyldiphenylketone, dibenzylketone, fluorenone, 4-phenylbenzophenone, 4,4-dichlorobenzophenone, Hydroxybenzophenone, 4-benzoyl-4'-methyl-diphenylsulfide, alkylated benzophenone, 3,3 ', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone, 4-benzoyl-N, N-dimethyl- N- [2- (1-oxo-2-propenyloxy) ethyl] benzenemethanaminium bromide, (4-benzoylbenzyl) trimethylammonium chloride, 2-hydroxy-3- (4-benzoylphenoxy) -N, N, N-trimethyl-1-propenami Um chloride monohydrate, thioxanthone, 2-chlorothioxan
- Examples of the (D) component include diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, and trimethylolpropane di (meth) acrylate.
- pentaerythritol tetraacrylate dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, tripentaerythritol heptaacrylate or tripentaerythritol octaacrylate is preferable, and the adhesion at the time of development due to improved hydrophobicity is preferred.
- Examples of the compound of the other component (D) include an epoxy (meth) acrylate obtained by reacting a polyfunctional epoxy compound with (meth) acrylic acid. Epoxy (meth) acrylate adds hydrophilicity and can be used for the purpose of improving alkali developability.
- Examples of the polyfunctional epoxy compound include the following compounds. These polyfunctional epoxy compounds are preferable because of their excellent heat resistance and chemical resistance.
- the content of the component (D) is preferably from 5 to 100 parts by mass, more preferably from 10 to 50 parts by mass, per 100 parts by mass of the resin (A). When the content is in such a range, the effect of improving the exposure sensitivity and the chemical resistance of the cured film is easily obtained.
- the photosensitive resin composition of the present invention may contain an antioxidant.
- an antioxidant By containing an antioxidant, it is possible to suppress a decrease in mechanical properties such as yellowing and elongation of the cured film in a heat treatment in a later step.
- oxidation of the metal material can be suppressed by a rust-preventing action on the metal material, which is preferable.
- hindered phenolic antioxidants include the following, but are not limited to the following structures.
- Hindered phenolic antioxidants also have the effect of improving resolution in order to suppress radical diffusion. Furthermore, when it can be developed with an aqueous alkali solution, it acts as a dissolution accelerator and also has a residue suppressing effect.
- hindered amine antioxidants include, for example, bis (1,2,2,6,6-pentamethyl-4-piperidyl) [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl Butylmalonate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, methyl-1,2,2,6,6-pentamethyl-4-piperidyl sebacate, 1,2,2 , 6,6-pentamethyl-4-piperidyl methacrylate, 2,2,6,6-tetramethyl-4-piperidyl methacrylate, bis (2,2,6,6-tetramethyl-1- (octyloxy) decanoate) Reaction product of -4-piperidinyl) ester, 1,1-dimethylethyl hydroperoxide and octane, tetrakis (1,2,2,6,6-pentamethyl- -Pyridyl) butane-1,2,3,4
- the heterocyclic compound containing a nitrogen atom includes 1H-imidazole, 1H-benzimidazole, 1H-pyrazole, indazole, 9H-carbazole, 1-pyrazoline, 2-pyrazoline, 3-pyrazoline, pyrazolidine, and 1H-triazole.
- the content of the solvent is preferably 100 parts by mass or more for dissolving the composition with respect to 100 parts by mass of the resin (A), and 1,500 parts by mass for forming a coating film having a film thickness of 1 ⁇ m or more. It is preferable that the content is not more than 1 part by weight.
- the photosensitive resin composition of the present invention may contain surfactants, esters such as ethyl lactate and propylene glycol monomethyl ether acetate, alcohols such as ethanol, cyclohexanone, methyl It may contain ketones such as isobutyl ketone and ethers such as tetrahydrofuran and dioxane.
- surfactants esters such as ethyl lactate and propylene glycol monomethyl ether acetate
- alcohols such as ethanol, cyclohexanone, methyl
- ketones such as isobutyl ketone and ethers such as tetrahydrofuran and dioxane.
- the photosensitive resin composition of the present invention may contain a silane coupling agent as a silicon component as long as storage stability is not impaired.
- a silane coupling agent include trimethoxyaminopropylsilane, trimethoxycyclohexylepoxyethylsilane, trimethoxyvinylsilane, trimethoxythiolpropylsilane, trimethoxyglycidyloxypropylsilane, tris (trimethoxysilylpropyl) isocyanurate, and triethoxyamino.
- the shape of the photosensitive resin composition of the present invention is not limited as long as it contains the resin (A), the photopolymerization initiator (B), and the component (C). It may be.
- the support is not particularly limited, but various commercially available films such as a polyethylene terephthalate (PET) film, a polyphenylene sulfide film, and a polyimide film can be used.
- the bonding surface between the support and the photosensitive resin composition may be subjected to a surface treatment such as silicone, a silane coupling agent, an aluminum chelating agent, or polyurea in order to improve the adhesion and the releasability.
- the thickness of the support is not particularly limited, but is preferably in the range of 10 to 100 ⁇ m from the viewpoint of workability.
- a protective film may be provided on the film surface. Thereby, the surface of the photosensitive resin composition can be protected from contaminants such as dust and dust in the atmosphere.
- the method of applying the photosensitive resin composition to the support includes spin coating using a spinner, spray coating, roll coating, screen printing, blade coater, die coater, calendar coater, meniscus coater, bar coater, roll coater, comma roll.
- Examples of the method include a coater, a gravure coater, a screen coater, and a slit die coater.
- the coating thickness varies depending on the coating method, the solid content concentration of the composition, the viscosity, and the like. preferable.
- ⁇ ⁇ ⁇ ⁇ Oven, hot plate, infrared ray, etc. can be used for drying.
- the drying temperature and the drying time may be within a range where the solvent can be volatilized, and it is preferable to appropriately set a range where the photosensitive resin composition is in an uncured or semi-cured state.
- the temperature may be increased stepwise by combining these temperatures.
- the heat treatment may be performed at 80 ° C. and 90 ° C. for 2 minutes each.
- the photosensitive resin composition of the present invention is applied to a substrate, or the photosensitive sheet is laminated on the substrate.
- a substrate a metal copper plating substrate, a silicon wafer, and a material such as ceramics and gallium arsenide are used, but the material is not limited to these.
- the coating method include spin coating using a spinner, spray coating, and roll coating. The coating thickness varies depending on the coating method, the solid content concentration of the composition, the viscosity and the like, but is usually applied so that the thickness after drying is 0.1 to 150 ⁇ m.
- the photosensitive resin composition is applied, or the substrate on which the photosensitive sheet of the present invention is laminated is dried to obtain a photosensitive resin film. Drying is preferably performed using an oven, a hot plate, infrared rays or the like at a temperature of 50 ° C. to 150 ° C. for 1 minute to several hours. In the case of a photosensitive sheet, the drying step does not always have to be performed.
- the photosensitive resin film is exposed to actinic radiation through a mask having a desired pattern to expose the photosensitive resin film.
- Actinic rays used for exposure include ultraviolet rays, visible rays, electron beams, and X-rays.
- the exposed photosensitive resin film may be subjected to a post-exposure bake (PEB) step as necessary.
- the PEB step is preferably performed at 50 ° C. to 150 ° C. for 1 minute to several hours using an oven, a hot plate, infrared rays or the like.
- the poor solvent examples include toluene, xylene, methanol, ethanol, isopropyl alcohol, ethyl lactate, propylene glycol methyl ether acetate, and water.
- a good solvent and a poor solvent are used as a mixture, it is preferable to adjust the ratio of the poor solvent to the good solvent depending on the solubility of the polymer in the photosensitive resin composition.
- each solvent may be used in combination of two or more kinds, for example, several kinds.
- the developer used for development is one that dissolves and removes a polymer soluble in an aqueous alkali solution, and is typically an aqueous alkaline solution in which an alkali compound is dissolved.
- the alkaline compound include tetramethylammonium hydroxide, diethanolamine, diethylaminoethanol, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, triethylamine, diethylamine, methylamine, dimethylamine, dimethylaminoethyl acetate, dimethylaminoethanol, and dimethylamine.
- Examples include aminoethyl methacrylate, cyclohexylamine, ethylenediamine, and hexamethylenediamine.
- a polar solvent such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, ⁇ -butyrolactone, dimethylacrylamide, methanol, ethanol, Alcohols such as isopropanol, ethyl lactate, esters such as propylene glycol monomethyl ether acetate, ketones such as cyclopentanone, cyclohexanone, isobutyl ketone, and methyl isobutyl ketone may be used alone or in combination.
- an organic solvent ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, and the like can be used in addition to the above-mentioned developer.
- an alcohol such as ethanol and isopropyl alcohol, an ester such as ethyl lactate and propylene glycol monomethyl ether acetate, and the like may be added to the water for rinsing.
- the cured film formed from the photosensitive resin composition or the photosensitive sheet of the present invention can be used for electronic components such as semiconductor devices and multilayer wiring boards. Specifically, it is suitable for use as a passivation film of a semiconductor, a surface protection film of a semiconductor device, an interlayer insulating film, an interlayer insulating film in a multilayer wiring for high-density mounting of 2 to 10 layers, and an insulating layer of an organic electroluminescent device. Although it is used, it is not limited to this and can take various structures.
- the surface of the substrate on which the cured film is to be formed can be appropriately selected depending on the application and process. Examples thereof include silicon, ceramics, metals, and epoxy resins. Even when the substrate surface is a substrate composed of two or more of these materials, Good.
- FIG. 1 is an enlarged sectional view of a pad portion of a semiconductor device having a bump according to the present invention.
- a passivation film 3 is formed on an input / output aluminum (hereinafter abbreviated as Al) pad 2 on a silicon wafer 1, and a via hole is formed in the passivation film 3.
- An insulating film 4 is formed thereon as a pattern of a cured film obtained by curing the photosensitive resin composition of the present invention, and a metal (Cr, Ti, etc.) film 5 is formed so as to be connected to the Al pad 2.
- Metal wiring (Al, Cu, etc.) 6 is formed by electrolytic plating or the like.
- the metal film 5 etches the periphery of the solder bump 10 to insulate between the pads.
- a barrier metal 8 and a solder bump 10 are formed on the insulated pad.
- the cured film obtained by curing the photosensitive resin composition of the insulating film 7 can be processed into a thick film at the scribe line 9.
- the cured film of the present invention is excellent in elongation at break and strength at break when a polyimide resin is used, so that the stress from the sealing resin can be reduced even at the time of mounting. And a highly reliable semiconductor device can be provided.
- FIG. 2A an input / output Al pad 2 and a passivation film 3 are formed on a silicon wafer 1, and an insulating film 4 is formed as a pattern of a cured film obtained by curing the photosensitive resin composition of the present invention. .
- a metal (Cr, Ti, etc.) film 5 is formed so as to be connected to the Al pad 2, and as shown in FIG. 2c, the metal wiring 6 is formed by plating. Form a film.
- a barrier metal 8 and a solder bump 10 are formed. Then, the wafer is diced along the last scribe line 9 and cut into chips. If the insulating film 7 has no pattern formed on the scribe line 9 or if a residue remains, cracks and the like occur during dicing, which affects the reliability evaluation of the chip. For this reason, it is very preferable to provide pattern processing excellent in thick film processing as in the present invention in order to obtain high reliability of a semiconductor device.
- varnish a photosensitive resin composition before curing
- varnish a photosensitive resin composition before curing
- a polytetrafluoroethylene filter manufactured by Sumitomo Electric Industries, Ltd.
- PLA parallel light mask aligner
- a sensitivity was used.
- Gray scale mask for measurement having a 2 to 50 ⁇ m 1: 1 line & space pattern. 1%, 5%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 25%, 30%, 35%, 40%, 50% and 60%).
- the varnish was a negative type, it was baked after exposure at 120 ° C. for 1 minute, and developed using a coating and developing apparatus MARK-7.
- TMAH tetramethylammonium hydroxide
- the film thickness was measured after development, and the minimum exposure amount at which the residual film ratio of the exposed portion exceeded 90% was defined as the sensitivity.
- the exposure was measured with an I-line illuminometer.
- the film thickness was measured at a refractive index of 1.629 using Lamda Ace STM-602 manufactured by Dainippon Screen Mfg. Co., Ltd. The same applies to the film thickness described below.
- the prepared pre-baked film is made of PLA-501F, an ultra-high pressure mercury lamp is used as a light source (mixed line of g-line, h-line and i-line), and a gray scale mask (2 to 50 ⁇ m, 1: 1 line) for sensitivity measurement & 1%, 5%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 25%, 30%, 35%, 40%, 50% And an area having a transmittance of 60%).
- AD-2000 automatic developing device manufactured by Takizawa Sangyo Co., Ltd.
- a shower was performed for 100 seconds using a 0.045% by mass aqueous solution of potassium hydroxide or 2.38% by mass of TMAH.
- the film thickness was measured after development, and the minimum exposure amount at which the residual film ratio of the exposed portion exceeded 90% was defined as the sensitivity. The exposure was measured with an I-line illuminometer. The film thickness was measured at a refractive index of 1.550 using Lambda Ace STM-602 manufactured by Dainippon Screen Mfg. Co., Ltd. The same applies to the film thickness described below.
- the cured film was immersed in a resist stripping solution, N300 at 50 ° C. for 3 minutes, and pattern peeling and change in film thickness (indicating swelling or elution amount) were observed.
- the evaluation of the results was performed in the same manner as in (3) -1 ⁇ Chemical Resistance Evaluation A ⁇ .
- Copper substrate adhesion evaluation (5) Copper substrate adhesion evaluation A The adhesion to metal copper was evaluated by the following method.
- the substrate was taken out, the substrate was divided into two parts, and the cured film was cut into 10 rows and 10 columns at 2 mm intervals using a single blade on the cured film.
- the adhesive property between the metal material and the cured resin film was evaluated based on how many of the 100 squares were peeled off by peeling with "Cellotape" (registered trademark).
- the other sample substrate was subjected to a PCT treatment for 400 hours under a saturation condition of 121 ° C.
- peeling test was performed in any of the substrates. In any of the substrates, the peeling test was performed such that the number of peeled samples was 0, 5, 1 or more but less than 10, 4, 10 or more but less than 30, 3, 30 or more and less than 50, and 2 or more.
- Copper substrate adhesion evaluation B A cured film having a thickness of 2.0 ⁇ m was formed on the copper substrate in the same manner as in the method described in (3) -2. The obtained substrate was divided into two, and the cured film was cut into 10 rows and 10 columns at 2 mm intervals using a single blade in each cured substrate. Using one of the sample substrates, the adhesive property between the metal material and the cured resin film was evaluated based on how many of the 100 squares were peeled off by peeling with "Cellotape" (registered trademark). The other sample substrate was subjected to a PCT treatment at 85 ° C.
- polyimide precursor resin (P-2) powder The molecular weight of the polyimide precursor (P-1) was measured by gel permeation chromatography (in terms of standard polystyrene). As a result, the weight average molecular weight (Mw) was 25,000, and the PDI was 2.3.
- the polyimide precursor (P-2) is soluble in an aqueous alkali solution, and a photosensitive resin composition using this is developed with a 2.38% by mass aqueous TMAH solution.
- Example 1 Under a yellow lamp, 10.00 g of a polyimide precursor (P-1), 1,2-octanedione, 1- [4- (phenylthio) -2- (O-benzoyloxime)] (“Irgacure OXE-01 ( (Trade name) "BASF) 0.50 g, BI 0.30 g, NK ester 4G (trade name) (manufactured by Shin-Nakamura Chemical Co., Ltd., chemical name: tetraethylene glycol dimethacrylate) 2.00 g, N-phenyl 0.2 g of diethanolamine and 0.30 g of 3-trimethoxysilylphthalamic acid were dissolved in 15.15 g of N-methylpyrrolidone (NMP) and 3.81 g of ethyl lactate (EL), and “Polyflow”, an acrylic surfactant, was used.
- NMP N-methylpyrrolidone
- EL ethyl lactate
- Example 2 The same operation was performed as in Example 1 except that BI was changed to B-II.
- Example 3 The same operation as in Example 1 was carried out except that BI was changed to B-III.
- Example 4 The procedure was performed in the same manner as in Example 1 except that BI was changed to B-IV.
- Example 5 The same operation as in Example 1 was performed except that BI was changed to BV.
- Example 6 The operation was performed in the same manner as in Example 1 except that BI was changed to B-VI.
- Example 7 The same operation was performed as in Example 1 except that BI was changed to B-VII.
- Example 8 The same operation as in Example 1 was performed except that BI was changed to B-VIII.
- Example 9 The same operation as in Example 1 was performed, except that BI was changed to B-IX.
- Example 10 The same operation was performed as in Example 3, except that P-1 was changed to P-3.
- Example 11 The same operation was performed as in Example 3, except that P-1 was changed to P-4.
- the properties of the obtained varnish were evaluated by the above-mentioned evaluation methods according to the pattern processability (sensitivity A, developability A), chemical resistance A, elongation at break, strength at break, coefficient of linear thermal expansion, copper substrate adhesion evaluation A, imide The conversion and storage stability were measured.
- Example 17 was carried out in the same manner as in Example 17, except that Irgacure 379 was changed to bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (“Irgacure 819 (trade name)”, manufactured by BASF).
- Irgacure 379 was treated with 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] phenyl ⁇ -2-methyl-propan-1-one ("Irgacure 127 (trade name)"). (Manufactured by BASF) was carried out in the same manner as in Example 17.
- Example 17 was carried out in the same manner as in Example 17, except that Irgacure 379 was changed to ethyl p-dimethylaminobenzoate.
- Example 17 was carried out in the same manner as in Example 17, except that Irgacure 379 was replaced with 4-phenylbenzophenone.
- a solid polyfunctional aromatic epoxy resin (YDCN-700-10 (trade name), manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), which is a cresol novolac type polyfunctional epoxy resin, is used.
- the procedure was performed in the same manner as in Example 1 except that 2 g of pentaerythritol hexaacrylate (DPHA (trade name), manufactured by Nippon Kayaku) was added. However, only the imidation ratio was not measured.
- Example 23 Under a yellow light, 10.00 g of a polyimide precursor (P-2), 2.0 g of TP5-280M (manufactured by Toyo Gosei; 5-naphthoquinonediazidesulfonic acid ester compound of TrisP-PA (manufactured by Honshu Chemical)), B- 0.2 g of IMP was dissolved in 14.5 g of NMP, and 0.10 g of a 1 wt% NMP solution of Polyflow 77 was added and stirred to obtain a varnish. The characteristics of the obtained varnish were measured by the above evaluation method. [Example 24] Example 23 was carried out in the same manner as in Example 23 except that BI was changed to B-II.
- Example 23 was carried out in the same manner as in Example 23 except that BI was changed to B-III.
- Example 23 was carried out in the same manner as in Example 23 except that BI was changed to B-IV.
- Example 23 was carried out in the same manner as in Example 23 except that BI was changed to BV.
- Example 28 Example 23 was carried out in the same manner as in Example 23 except that BI was changed to B-VI.
- Example 29 was carried out in the same manner as in Example 23 except that BI was changed to B-VII.
- Example 30 Example 23 was carried out in the same manner as in Example 23 except that BI was changed to B-VIII.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to B-IV.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to BV.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to B-VI.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to B-VII.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to B-VIII.
- Example 45 Example 37 was carried out in the same manner as in Example 37 except that BI was changed to B-IX.
- Example 46 Under yellow light, 0.240 g of TP5-280M (manufactured by Toyo Gosei; 5-Naphthoquinonediazidesulfonic acid ester compound of TrisP-PA (manufactured by Honshu Chemical)), 0.160 g of BI, and 3-methacryloxypropyltrimethoxysilane (KBM-503 (trade name), manufactured by Shin-Etsu Chemical Co., Ltd.) in 0.120 g and a mixed solvent of 7.565 g of PGME and 3.200 g of PGMEA were dissolved in a silicone-based surfactant (trade name “BYK” (registered trademark)).
- a silicone-based surfactant trade name “BYK” (registered trademark)
- Example 46 was carried out in the same manner as in Example 46 except that BI was changed to B-II.
- Example 1 Example 1 was carried out in the same manner as in Example 1 except that BI was changed to BX.
- Example 2 The operation was performed in the same manner as in Example 3 except that OXE-01 was not added.
- Example 3 The same operation was performed as in Example 1 except that BI was not added.
- Example 4 Example 23 was carried out in the same manner as in Example 23 except that BI was changed to BX.
- Example 5 The same operation as in Example 25 was performed except that TP5-280M was not added.
- Comparative Example 6 The same operation was performed as in Example 23 except that BI was not added.
- Comparative Example 7 The same operation as in Example 22 was carried out except that B-III was not added.
- Example 37 was carried out in the same manner as in Example 37 except that BI was changed to BX.
- Example 9 The same operation as in Example 39 was carried out except that IC-819 and OXE-02 were not added.
- Example 10 The same operation as in Example 37 was performed except that BI was not added.
- Example 46 was carried out in the same manner as in Example 46, except that BI was changed to BX.
- Example 12 The same operation as in Example 48 was performed except that TP5-280M was not added.
- Comparative Example 13 The same operation as in Example 46 was performed except that BI was not added. The results of the examples and comparative examples are shown in the following table.
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Abstract
Description
ここで、酸成分はテトラカルボン酸又はテトラカルボン酸二無水物若しくはテトラカルボン酸ジエステルジクロリドなどが挙げられる。ジアミン成分はジアミン又はジイソシアネート化合物若しくはトリメチルシリル化ジアミンなどが挙げられる。
ジケトン化合物としては、ベンジルが挙げられる。
ケトエステル化合物としては、ベンゾイルギ酸メチル、ベンゾイルギ酸エチルが挙げられる。
(A)樹脂の重量平均分子量(Mw)は、GPC(ゲルパーミエーションクロマトグラフィー)装置Waters2690-996(日本ウォーターズ(株)製)を用いて確認した。展開溶媒をN-メチル-2-ピロリドン(以降NMPと呼ぶ)として測定し、ポリスチレン換算で重量平均分子量(Mw)及び分散度(PDI=Mw/Mn)を計算した。
(2)-1 感度A
各実施例および比較例により得られた,ポリイミド系樹脂およびエポキシ樹脂を用いたワニスをシリコンウエハにスピンコーター(ミカサ(株)製1H-360S)を用いてスピンコートした後、ホットプレート(大日本スクリーン製造(株)製SCW-636)を用いて120℃で3分間プリベークし、膜厚11μmのプリベーク膜を作製した。得られたプリベーク膜に、パラレルライトマスクアライナー(以下PLAという)(キヤノン(株)製PLA-501F)を用いて超高圧水銀灯を光源(g線、h線、i線の混合線)として、感度測定用のグレースケールマスク(2~50μmの、1:1のライン&スペースのパターンを有する。それぞれ、1%、5%、10%、12%、14%、16%、18%、20%、22%、25%、30%、35%、40%、50%および60%の透過率となるエリアを有する。)を介してコンタクトで露光した。その後、ワニスがネガ型の場合は120℃で1分間露光後ベークをし、塗布現像装置MARK-7を用いて現像を行った。ポリマーがアルカリ水溶液に溶解しない場合は現像液としてシクロペンタノンを用いて2分間シャワー現像し、ついでプロピレングリコールモノメチルエーテルアセテートで30秒間リンスした。ポリマーがアルカリ水溶液に溶解する場合は、現像液として2.38質量%水酸化テトラメチルアンモニウム(以下、「TMAH」と略す)水溶液(商品名「ELM-D」、三菱ガス化学(株)製)で90秒間パドル現像し、次いで水で30秒間リンスした。
なお、膜厚は大日本スクリーン製造(株)製ラムダエースSTM-602を用いて屈折率1.629で測定した。以下に記載する膜厚も同様である。
スピンコーターを用いて、各実施例および比較例により得られたポリシロキサンを用いたワニスを、10cm角の無アルカリガラス基板上に、スピンコートし、ホットプレートを用いて、温度90℃で2分間プリベークし、膜厚2μmのプリベーク膜を作製した。
なお、膜厚は大日本スクリーン製造(株)製ラムダエースSTM-602を用いて屈折率1.550で測定した。以下に記載する膜厚も同様である。
(2)-1で定義した感度Aでの露光量における現像後の最小パターン寸法を測定した。
(2)-2で定義した感度Bでの露光量における現像後の最小パターン寸法を測定した。
(3)-1 耐薬品性評価A
各実施例および比較例により得られた,ポリイミド系樹脂およびエポキシ樹脂を用いたワニスを、シリコンウエハ上に120℃で3分間プリベークを行った後の膜厚が10μmとなるように塗布現像装置MARK-7を用いてスピンコート法で塗布し、プリベークした後、ネガ型の場合はPLA-501Fを用いて全面に300mJ/cm2を露光し、ポジ型の場合はそのまま、イナートオーブンCLH-21CD-Sを用いて、窒素気流下において酸素濃度20ppm以下で毎分3.5℃の昇温速度で180℃まで昇温し、それぞれの温度で1時間加熱処理を行なった。温度が50℃以下になったところでシリコンウエハを取り出し、その硬化膜を有機薬液(ジメチルスルホキシド:25質量%TMAH水溶液=92:2)に40℃で10分間浸漬させ、パターンの剥がれや膜厚の変化(膨潤または溶出量を示す)を観察した。その結果が、パターンの剥がれ無く、膜厚変化が5%以下のものを4、パターンの剥がれ無く、膜厚変化5%を超えて10%以下を3、パターンの剥がれ無く、膜厚変化が10%を超えて30%以下を2、パターンが剥がれ膜が残らない場合や膜厚変化が30%を超えるものを1として、評価した。
パターンの剥がれが無く、膜厚変化が小さいものほど良好な耐薬品性を示す。
各実施例および比較例により得られたポリシロキサンを用いたワニスを、スピンコーターを用いて、表面にITOをスパッタリングしたガラス基板(以下、「ITO基板」という)上にスピンコートし、ホットプレート(商品名SCW-636、大日本スクリーン製造(株)製)を用いて100℃で2分間プリベークし、膜厚2.0μmの膜を作製した。
各実施例および比較例により得られた,ポリイミドおよびエポキシ樹脂を用いたワニスを6インチのシリコンウエハ上に、120℃で3分間のプリベーク後の膜厚が11μmとなるように塗布現像装置ACT-8を用いてスピンコート法で塗布およびプリベークした後、ネガ型の場合はPLAを用いて全面に300mJ/cm2を露光し、ポジ型の場合はそのままイナートオーブンCLH-21CD-S(光洋サーモシステム(株)製)を用いて、酸素濃度20ppm以下で3.5℃/分で180℃まで昇温し、それぞれの温度で1時間加熱処理を行なった。温度が50℃以下になったところでシリコンウエハを取り出し、45質量%のフッ化水素酸に5分間浸漬することで、ウエハより樹脂組成物の硬化膜を剥がした。この膜を幅1.5cm、長さ9cmの短冊状に切断し、テンシロンRTM-100((株)オリエンテック製)を用いて、室温23.0℃、湿度45.0%RH下で引張速度50mm/分で引っ張り(チャック間隔=2cm)、破断点伸度(%)および破断点強度(MPa)の測定を行なった。測定は1検体につき10枚の短冊について行ない、結果から数値の高い上位5点の平均値を求めた(有効数字=2桁)。この評価は、ポリイミド、およびエポキシ樹脂の機械特性評価として実施した。
(5)-1 銅基板密着性評価A
次の方法にて金属銅との密着性評価を行なった。
銅基板上に、前記(3)-2記載の方法と同様にして膜厚2.0μmの硬化膜を形成した。得られた基板を2分割し、それぞれの基板についてキュア後の膜に片刃を使用して2mm間隔で10行10列の碁盤目状の切り込みをいれた。このうち一方のサンプル基板を用い、“セロテープ”(登録商標)による引き剥がしによって100マスのうち何マス剥がれたかで金属材料/樹脂硬化膜間の接着特性の評価を行なった。また、もう一方のサンプル基板については、プレッシャークッカー試験(PCT)装置(タバイエスペエック(株)製HAST CHAMBER EHS-211MD)を用いて85℃、85%の条件で25時間PCT処理を行なった後、上記の引き剥がしテストを行なった。密着性の判定は、前記(5)-1 銅基板密着性評価Aと同様に行った。
硬化膜のイミド化率(%)は、以下の方法で容易に求めることができる。(4)と同じ手順で加熱処理まで行いシリコンウエハ上に硬化膜を作製した。次に作製した硬化膜の赤外吸収スペクトルを測定し(シリコンウエハをベースラインとする)、ポリイミドに起因するイミド構造の吸収ピーク(1780cm-1付近、1377cm-1付近)の存在を確認し、1377cm-1付近のピーク強度(X)を求める。次に、その硬化膜を350℃で1時間熱処理し、赤外吸収スペクトルを測定し、1377cm-1付近のピーク強度(Y)を求める。これらのピーク強度比が熱処理前ポリマー中のイミド基の含量、すなわちイミド化率に相当する(イミド化率=X/Y×100(%))。
調製後のワニスの粘度および23℃下で2週間放置した後の粘度を測定し、放置前後の粘度の変化率を計算した。
ITO基板上に、前記(3)-2記載の方法と同様にして得られた膜厚2.0μmの硬化膜を形成した。得られた硬化膜について、JIS「K5600-5-4(制定年月日=1999/04/20)」に準拠して鉛筆硬度を測定した。この評価は、ポリシロキサンの機械特性評価として実施した。
(4)と同様の手順で硬化膜の自立膜を作製し、この膜を3.0cm×0.5cmになるように片刃で切り出し、示差走査熱量計(セイコーインスツル製、TMA/SS6100)を用いて窒素気流下80mL/min条件下において、10℃/minの速度で25℃から400℃まで昇温し、測定した。50℃から150℃における線膨張係数をCTE(10-6/K)として算出した。
4,4’-オキシジフタル酸二無水物(ODPA)31.02g(0.10mol)を500ml容量のセパラブルフラスコに入れ、2-ヒドロキシエチルメタクリレート(HEMA)を26.03g(0.20mol)とγ―ブチロラクトン76mlを入れて室温下で、撹拌しながらピリジン16.22g(0.21mol)を加えて反応混合物を得た。反応による発熱の終了後に室温まで放冷し、16時間放置した。
乾燥窒素気流下、ODPA62.04g(0.2モル)をNMP1000gに溶解させた。ここに下記構造のジアミン(HA)96.72g(0.16モル)と1,3-ビス(3-アミノプロピル)テトラメチルジシロキサン(SiDA)4.97g(0.02モル)をNMP100gとともに加えて、20℃で1時間反応させ、次いで50℃で2時間反応させた。次に末端封止剤として3-アミノフェノール(MAP)4.37g(0.04モル)をNMP30gとともに加え、50℃で2時間反応させた。その後、N,N-ジメチルホルムアミドジメチルアセタール47.66g(0.4モル)をNMP50gで希釈した溶液を10分かけて滴下した。滴下後、50℃で3時間撹拌した。撹拌終了後、溶液を室温まで冷却した後、溶液を水1Lに投入して沈殿を得た。この沈殿を濾過で集めて、水で3回洗浄した後、80℃の真空乾燥機で20時間乾燥し、ポリイミド前駆体樹脂(P-2)の粉末を得た。ポリイミド前駆体(P-1)の分子量をゲルパーミエーションクロマトグラフィー(標準ポリスチレン換算)で測定したところ、重量平均分子量(Mw)は25000、PDIは2.3であった。ポリイミド前駆体(P-2)はアルカリ水溶液に可溶であり、これを用いた感光性樹脂組成物は2.38質量%TMAH水溶液で現像される。
ODPAに替えてビフェニルテトラカルボン酸無水物(BPDA)29.42gを用いた以外は、合成例1と同様に実施し、ポリイミド前駆体(P-3)を得た。ポリイミド前駆体(P-3)のMwは34000、PDIは2.5であった。ポリイミド前駆体(P-3)はシクロペンタノンで現像される。
DAE18.62gに替えて、DAE18.03g(0.090mol)および1,3,5-トリス(4-アミノフェノキシ)ベンゼン(TAPOB)0.80g(0.002mol)を用いた以外は、合成例1と同様に実施し、ポリイミド前駆体(P-4)を得た。ポリイミド前駆体(P-4)のMwは27000、PDIは2.9であった。ポリイミド前駆体(P-4)はシクロペンタノンで現像される。
500mlの三口フラスコに、p-スチリルトリメトキシシラン(St)を43.74g(0.195mol)、γ-アクリロイルプロピルトリメトキシシラン(Acry)を14.06g(0.06mol)、3-トリメトキシシリルプロピルコハク酸無水物(Suc)を11.80g(0.045mol)、TBCを0.173g、PGMEを74.58g仕込み、室温で撹拌しながら、水17.01gにリン酸0.348g(仕込みモノマーに対して0.50質量%)を溶かしたリン酸水溶液を30分間かけて添加した。その後、三口フラスコを70℃のオイルバスに浸けて90分間撹拌した後、オイルバスを30分間かけて115℃まで昇温した。昇温開始1時間後に三口フラスコの内温(溶液温度)が100℃に到達し、そこから2時間加熱撹拌し(内温は100~110℃)、ポリシロキサン溶液を得た。なお、昇温および加熱撹拌中、窒素を0.05リットル/分流した。反応中に、副生成物であるメタノールおよび水が合計36.90g留出した。得られたポリシロキサン溶液に、固形分濃度が40質量%となるようにPGMEを追加し、ポリシロキサン(P-5)溶液を得た。
500mlの三口フラスコに、p-スチリルトリメトキシシラン(St)を44.86g(0.200mol)、フェニルトリメトキシシラン(Ph)を39.66g(0.200mol)、メチルトリメトキシシラン(Me)6.81g(0.050mol)、3-トリメトキシシリルプロピルコハク酸無水物(Suc)を13.12g(0.050mol)、TBCを0.522g、PGMEを74.58g仕込み、室温で撹拌しながら、水27.90gにリン酸0.448g(仕込みモノマーに対して0.50質量%)を溶かしたリン酸水溶液を30分間かけて添加した。その後、三口フラスコを70℃のオイルバスに浸けて90分間撹拌した後、オイルバスを30分間かけて115℃まで昇温した。昇温開始1時間後に三口フラスコの内温(溶液温度)が100℃に到達し、そこから2時間加熱撹拌し(内温は100~110℃)、ポリシロキサン溶液を得た。なお、昇温および加熱撹拌中、窒素を0.05リットル/分流した。反応中に、副生成物であるメタノールおよび水が合計58.90g留出した。得られたポリシロキサン溶液に、固形分濃度が40質量%となるようにPGMEを追加し、ポリシロキサン(P-6)溶液を得た。
黄色灯下にて、ポリイミド前駆体(P-1)10.00g、1,2-オクタンジオン,1-[4-(フェニルチオ)-2-(O-ベンゾイルオキシム)](「イルガキュアOXE-01(商品名)」BASF製)0.50g、B-I0.30g、NKエステル 4G(商品名)(新中村化学工業(株)製、化学名:テトラエチレングリコールジメタクリレート)2.00g、N-フェニルジエタノールアミン0.2g、3-トリメトキシシリルフタルアミド酸0.30gを、N-メチルピロリドン(NMP)15.15gおよび乳酸エチル(EL)3.81gに溶解させ、アクリル系界面活性剤である「ポリフロー77(商品名)」(共栄社化学(株)製)の1質量%EL溶液0.10gを加え、撹拌してワニスを得た。得られたワニスの特性を上記評価方法により、パターン加工性(感度A、現像性A)、耐薬品性A、破断点伸度、破断点強度、熱線膨張係数、銅基板密着性評価A、イミド化率測定および保存安定性を測定した。
[実施例2]
B-IをB-IIに替えた以外は、実施例1と同様に実施した。
[実施例3]
B-IをB-IIIに替えた以外は、実施例1と同様に実施した。
[実施例4]
B-IをB-IVに替えた以外は、実施例1と同様に実施した。
[実施例5]
B-IをB-Vに替えた以外は、実施例1と同様に実施した。
[実施例6]
B-IをB-VIに替えた以外は、実施例1と同様に実施した。
B-IをB-VIIに替えた以外は、実施例1と同様に実施した。
[実施例8]
B-IをB-VIIIに替えた以外は、実施例1と同様に実施した。
[実施例9]
B-IをB-IXに替えた以外は、実施例1と同様に実施した。
[実施例10]
P-1をP-3に替えた以外は、実施例3と同様に実施した。
[実施例11]
P-1をP-4に替えた以外は、実施例3と同様に実施した。
B-IIIの添加量を0.01gとした以外は、実施例3と同様に実施した。
[実施例13]
B-IIIの添加量を0.03gとした以外は、実施例3と同様に実施した。
[実施例14]
B-IIIの添加量を0.7gとした以外は、実施例3と同様に実施した。
[実施例15]
B-IIIの添加量を1.0gとした以外は、実施例3と同様に実施した。
[実施例16]
B-IIIの添加量を2.0gとした以外は、実施例3と同様に実施した。
[実施例17]
黄色灯下にて、ポリイミド前駆体(P-1)10.00g、2-(ジメチルアミノ)-2-[(4-メチルフェニル)メチル]-1-[4-(4-モルホリニル)フェニル]-1-ブタノン(「イルガキュア379(商品名)」BASF製)0.80g、ジエチルチオキサントン0.2g、B-III0.30g、4G2.00g、N-フェニルジエタノールアミン0.2g、3-トリメトキシシリルフタルアミド酸0.30gを、NMP15.15gおよびEL3.81gに溶解させ、ポリフロー77の1質量%EL溶液0.10gを加え、撹拌してワニスを得た。得られたワニスの特性を上記評価方法により、パターン加工性(感度A、現像性A)、耐薬品性A、破断点伸度、破断点強度、熱線膨張係数、銅基板密着性評価A、イミド化率測定および保存安定性を測定した。
イルガキュア379をビス(2,4,6-トリメチルベンゾイル)-フェニルホスフィンオキサイド(「イルガキュア819(商品名)」BASF製)に替えた以外は実施例17と同様に実施した。
[実施例19]
イルガキュア379を2-ヒロドキシ-1-{4-[4-(2-ヒドロキシ-2-メチル-プロピオニル)-ベンジル]フェニル}-2-メチル-プロパン-1-オン(「イルガキュア127(商品名)」BASF製)に替えた以外は実施例17と同様に実施した。
[実施例20]
イルガキュア379をp-ジメチルアミノ安息香酸エチルに替えた以外は実施例17と同様に実施した。
[実施例21]
イルガキュア379を4-フェニルベンゾフェノンに替えた以外は、実施例17と同様に実施した。
[実施例22]
ポリイミド前駆体(P-1)の代わりに、クレゾールノボラック型多官能エポキシ樹脂である固形多官能芳香族エポキシ樹脂(YDCN-700-10(商品名)、新日鉄住金化学社製)を用い、さらにジペンタエリスリトールヘキサアクリレート(DPHA(商品名)、日本化薬製)を2g添加した以外は、実施例1と同様に実施した。ただし、イミド化率だけは測定しなかった。
黄色灯下にて、ポリイミド前駆体(P-2)10.00g、TP5-280M(東洋合成製;TrisP-PA(本州化学製)の5-ナフトキノンジアジドスルホン酸エステル化合物)2.0g、B-I0.2gを、NMP14.5gに溶解させ、ポリフロー77の1wt%NMP溶液0.10gを加え、撹拌してワニスを得た。得られたワニスの特性を上記評価方法により測定した。
[実施例24]
B-IをB-IIに替えた以外は、実施例23と同様に実施した。
[実施例25]
B-IをB-IIIに替えた以外は、実施例23と同様に実施した。
[実施例26]
B-IをB-IVに替えた以外は、実施例23と同様に実施した。
[実施例27]
B-IをB-Vに替えた以外は、実施例23と同様に実施した。
[実施例28]
B-IをB-VIに替えた以外は、実施例23と同様に実施した。
[実施例29]
B-IをB-VIIに替えた以外は、実施例23と同様に実施した。
[実施例30]
B-IをB-VIIIに替えた以外は、実施例23と同様に実施した。
[実施例31]
B-IをB-IXに替えた以外は、実施例23と同様に実施した。
[実施例32]
B-IIIの添加量を0.01gとした以外は、実施例25と同様に実施した。
[実施例33]
B-IIIの添加量を0.03gとした以外は、実施例25と同様に実施した。
[実施例34]
B-IIIの添加量を0.7gとした以外は、実施例25と同様に実施した。
[実施例35]
B-IIIの添加量を1.0gとした以外は、実施例25と同様に実施した。
[実施例36]
B-IIIの添加量を1.5gとした以外は、実施例25と同様に実施した。
黄色灯下にて、エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(O-アセチルオキシム)(“イルガキュア”(登録商標)OXE-02(商品名)、BASFジャパン(株)製)0.080gおよびビス(2,4,6-トリメチルベンゾイル)-フェニルフォスフィンオキサイド(“イルガキュア”(登録商標)-819(商品名)、BASFジャパン(株)製)0.160g、エチレンビス(オキシエチレン)ビス[3-(5-tert-ブチル-4-ヒドロキシ-m-トリル)プロピオネート](“イルガノックス”(登録商標)-245(商品名)、BASFジャパン(株)製)のPGME10質量%溶液0.200g、ペンタエリスリトールアクリレート(“ライトアクリレート”(登録商標)PE-3A(商品名)、共栄社化学(株)製)0.800g、B-I0.16g、3-メタクリロキシプロピルトリメトキシシラ(KBM-503(商品名)、信越化学(株)製)0.120gを、PGME8.615gとPGMEA3.200gの混合溶剤に溶解させ、シリコーン系界面活性剤(商品名“BYK”(登録商標)-333、ビックケミー・ジャパン(株)製)のPGME10質量%希釈溶液0.020g(濃度100ppmに相当)を加え、撹拌した。その後、(A)ポリシロキサンとして、ポリシロキサン(P-5)溶液6.645g、次いで0.45μmのフィルターでろ過を行い、ポリシロキサン含有のワニスを得た。得られたワニスについて、前述に記載した、感度B、現像性B、耐薬品性B、硬度、銅基板密着性B、保存安定性をそれぞれ評価した。
[実施例38]
B-IをB-IIに替えた以外は、実施例37と同様に実施した。
[実施例39]
B-IをB-IIIに替えた以外は、実施例37と同様に実施した。
B-IをB-IVに替えた以外は、実施例37と同様に実施した。
[実施例41]
B-IをB-Vに替えた以外は、実施例37と同様に実施した。
[実施例42]
B-IをB-VIに替えた以外は、実施例37と同様に実施した。
[実施例43]
B-IをB-VIIに替えた以外は、実施例37と同様に実施した。
[実施例44]
B-IをB-VIIIに替えた以外は、実施例37と同様に実施した。
[実施例45]
B-IをB-IXに替えた以外は、実施例37と同様に実施した。
黄色灯下にて、TP5-280M(東洋合成製;TrisP-PA(本州化学製)の5-ナフトキノンジアジドスルホン酸エステル化合物)0.240g、B-I0.160g、3-メタクリロキシプロピルトリメトキシシラン(KBM-503(商品名)、信越化学(株)製)0.120gおよび、PGME7.565gとPGMEA3.200gの混合溶剤に溶解させ、シリコーン系界面活性剤(商品名“BYK”(登録商標)-333、ビックケミー・ジャパン(株)製)のPGME10質量%希釈溶液0.020g(濃度100ppmに相当)を加え、撹拌した。その後、(A)ポリシロキサンとして、ポリシロキサン(P-6)溶液8.695g、次いで0.45μmのフィルターでろ過を行い、ワニスを得た。得られたワニスについて、前述に記載した、感度B、現像性B、耐薬品性B、硬度、銅基板密着性B、保存安定性をそれぞれ評価した。
[実施例47]
B-IをB-IIに替えた以外は、実施例46と同様に実施した。
[実施例48]
B-IをB-IIIに替えた以外は、実施例46と同様に実施した。
[実施例49]
B-IをB-IVに替えた以外は、実施例46と同様に実施した。
[実施例50]
B-IをB-Vに替えた以外は、実施例46と同様に実施した。
[実施例51]
B-IをB-VIに替えた以外は、実施例46と同様に実施した。
[実施例52]
B-IをB-VIIに替えた以外は、実施例46と同様に実施した。
[実施例53]
B-IをB-VIIIに替えた以外は、実施例46と同様に実施した。
[実施例54]
B-IをB-IXに替えた以外は、実施例46と同様に実施した。
B-IをB-Xに替えた以外、実施例1と同様に実施した。
[比較例2]
OXE-01を添加しない以外は、実施例3と同様に実施した。
[比較例3]
B-Iを添加しない以外は、実施例1と同様に実施した。
[比較例4]
B-IをB-Xに替えた以外は、実施例23と同様に実施した。
[比較例5]
TP5-280Mを添加しない以外は、実施例25と同様に実施した。
[比較例6]
B-Iを添加しない以外は、実施例23と同様に実施した。
[比較例7]
B-IIIを添加しない以外は、実施例22と同様に実施した。
[比較例8]
B-IをB-Xに替えた以外、実施例37と同様に実施した。
[比較例9]
IC-819、OXE-02を添加しない以外は、実施例39と同様に実施した。
[比較例10]
B-Iを添加しない以外は、実施例37と同様に実施した。
[比較例11]
B-IをB-Xに替えた以外は、実施例46と同様に実施した。
[比較例12]
TP5-280Mを添加しない以外は、実施例48と同様に実施した。
[比較例13]
B-Iを添加しない以外は、実施例46と同様に実施した。
実施例および比較例の結果を以下の表に示す。
2 Alパッド
3 パッシベーション膜
4 絶縁膜
5 金属(Cr、Ti等)膜
6 金属配線(Al、Cu等)
7 絶縁膜
8 バリアメタル
9 スクライブライン
10 ハンダバンプ
Claims (17)
- (A)エポキシ樹脂、ポリイミド、ポリイミド前駆体、ポリベンゾオキサゾール、ポリベンゾオキサゾール前駆体およびポリシロキサンからなる群から選ばれるいずれか1種類以上の樹脂、(B)熱塩基発生剤および(C)感光剤を含有する感光性樹脂組成物であって、該(B)熱塩基発生剤がグアニジン誘導体および/またはビグアニド誘導体を含有し、該(C)感光剤が(c-1)光酸発生剤および/または(c-2)光ラジカル重合開始剤を含有する感光性樹脂組成物。
- 前記(A)樹脂が、ポリイミド前駆体を含有する、請求項1記載の感光性樹脂組成物。
- 前記(A)樹脂が、ポリシロキサンを含有する、請求項1または2記載の感光性樹脂組成物。
- 前記(B)熱塩基発生剤が、4級ホウ素アニオンを有するグアニジン誘導体および/またはビグアニド誘導体を含有する、請求項1~3のいずれかに記載の感光性樹脂組成物。
- 前記一般式(1)中のZ-が、一般式(2)~(4)のいずれかの構造を含む請求項5に記載の感光性樹脂組成物。
(一般式(2)中、R8~R16はそれぞれ独立して、水素原子、ハロゲン原子、ニトロ基またはいずれも置換若しくは無置換の、炭素数1~50のアルキル基、炭素数6~50のアリール基、炭素数7~50のアリールアルキル基若しくは炭素数1~50のアルコキシ基を示す。)
(一般式(3)中、R17~R25はそれぞれ独立して、水素原子、ハロゲン原子、ニトロ基またはいずれも置換若しくは無置換の、炭素数1~50のアルキル基、炭素数6~50のアリール基、炭素数7~50のアリールアルキル基若しくは炭素数1~50のアルコキシ基を示し、Yは酸素原子または硫黄原子を示す。)
(一般式(4)中、R26~R29は、水素原子、ハロゲン原子またはいずれも置換若しくは無置換の、炭素数1~50のアルキル基、炭素数1~50のアルコキシ基、炭素数2~50のアルケニル基、炭素数2~50のアルキニル基、炭素数6~50のアリール基、炭素数7~50のアリールアルキル基、炭素数7~50のアリールアルキニル基、フラニル基、チエニル基若しくはピロリル基を示す。) - 前記(A)樹脂が、ビフェニル構造を有するポリイミド前駆体を含有する、請求項1~7に記載の感光性樹脂組成物。
- 前記(A)樹脂が、3価以上のアミノ化合物の残基を有するポリイミド前駆体を含有する、請求項1~8に記載の感光性樹脂組成物。
- 前記(C)感光剤が、(c-1)光酸発生剤を含有する、請求項1~9のいずれかに記載の感光性樹脂組成物。
- 前記(C)感光剤が、(c-2)光ラジカル重合開始剤を含有し、該(c-2)光ラジカル重合開始剤がアルキルフェノン化合物、アミノベンゾフェノン化合物、ジケトン化合物、ケトエステル化合物、ホスフィンオキサイド化合物、オキシムエステル化合物および安息香酸エステル化合物からなる群から選ばれるいずれか一種類以上を含有する請求項1~9のいずれかに記載の感光性樹脂組成物。
- 前記(A)樹脂100質量部に対し、前記(B)熱塩基発生剤の含有量が、0.1質量部以上10質量部以下である請求項1~11のいずれかに記載の感光性樹脂組成物。
- 請求項1~12のいずれかに記載の感光性樹脂組成物から形成された感光性シート。
- 請求項1~12のいずれかに記載の感光性樹脂組成物、または請求項13記載の感光性シートを硬化した硬化膜。
- 請求項1~12のいずれかに記載の感光性樹脂組成物を基板に塗布し、または請求項13に記載の感光性シートを基板上にラミネートし、乾燥して感光性樹脂膜を形成する工程と、該感光性樹脂膜を露光する工程と、露光後の感光性樹脂膜を現像する工程と、現像後の感光性樹脂膜を加熱処理する工程とを含む、硬化膜の製造方法。
- 前記現像後の感光性樹脂膜を加熱処理する工程が、170℃以上280℃以下で加熱処理する工程を含む、請求項15に記載の硬化膜の製造方法。
- 請求項14に記載の硬化膜のレリーフパターンを有する、電子部品。
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| JPWO2020031958A1 (ja) | 2021-08-10 |
| KR102683127B1 (ko) | 2024-07-10 |
| KR20210040936A (ko) | 2021-04-14 |
| CN112368641B (zh) | 2025-05-02 |
| JP7409087B2 (ja) | 2024-01-09 |
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