WO2021010360A1 - 感光性樹脂組成物、感光性ドライフィルム、積層体及びパターン形成方法 - Google Patents
感光性樹脂組成物、感光性ドライフィルム、積層体及びパターン形成方法 Download PDFInfo
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- WO2021010360A1 WO2021010360A1 PCT/JP2020/027174 JP2020027174W WO2021010360A1 WO 2021010360 A1 WO2021010360 A1 WO 2021010360A1 JP 2020027174 W JP2020027174 W JP 2020027174W WO 2021010360 A1 WO2021010360 A1 WO 2021010360A1
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- 0 CC(C)(C)N(C(N(CC1OC1)C(N1C(C)(C)C)=O)=*)C1=O Chemical compound CC(C)(C)N(C(N(CC1OC1)C(N1C(C)(C)C)=O)=*)C1=O 0.000 description 1
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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
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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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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/44—Block-or graft-polymers containing polysiloxane sequences containing only polysiloxane sequences
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/50—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/50—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages
- C08G77/52—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages containing aromatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/372—Sulfides, e.g. R-(S)x-R'
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/14—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/14—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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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
- G03F7/038—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
- G03F7/20—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
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
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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
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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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
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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
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
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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, a photosensitive dry film, a laminate, and a pattern forming method.
- the present invention has been made in view of the above circumstances, and is used for a thick film, a fine pattern can be easily formed, crack resistance, a substrate, an electronic component, a semiconductor element, etc., particularly a circuit board.
- a photosensitive resin that has excellent various film properties such as adhesion to a substrate and can form a cured product layer (cured film) with excellent reliability as a film for protecting electrical and electronic components and a film for bonding substrates. It is an object of the present invention to provide a composition, a photosensitive dry film, a laminate using these, and a pattern forming method.
- the present invention provides the following photosensitive resin composition, photosensitive dry film, laminate and pattern forming method.
- a photosensitive resin composition containing (A) a silicone skeleton-containing polymer and (B) a photoacid generator.
- B2 A photosensitive resin composition in which the silicone skeleton-containing polymer contains repeating units represented by the following formulas (a1) to (a4) and (b1) to (b4). [In the formula, R 1 to R 4 are independently monovalent hydrocarbon groups having 1 to 8 carbon atoms. m is an integer from 1 to 600.
- the photosensitive resin composition of the present invention By using the photosensitive resin composition of the present invention, a film can be easily formed.
- the obtained film has excellent resolution, excellent performance in microfabrication, and good reliability (adhesion, crack resistance), resolution and flexibility.
- m is an integer of 1 to 600, but an integer of 1 to 400 is preferable, and an integer of 1 to 200 is more preferable.
- the alkyl group may be linear, branched or cyclic, and specific examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, structural isomers thereof and the like.
- the alkoxy group may be linear, branched or cyclic, and specific examples thereof include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, structural isomers thereof and the like.
- R 31 and R 32 are independently hydrogen atoms or methyl groups, respectively.
- t 1 and t 2 are independently integers from 0 to 7.
- the weight average molecular weight (Mw) of the silicone skeleton-containing polymer of the component (A) is preferably 3,000 to 500,000, and more preferably 5,000 to 200,000.
- Mw is a polystyrene-equivalent measured value by gel permeation chromatography (GPC) using tetrahydrofuran as an elution solvent.
- the silicone skeleton-containing polymer of the component (A) preferably contains the repeating units a3 and b3.
- Each repeating unit described above may be bonded at random or as a block polymer. Further, the siloxane unit in each repeating unit may be randomly bonded or may contain a plurality of blocks of the same type of siloxane unit. Further, in the silicone resin, the silicone (siloxane unit) content is preferably 30 to 80% by mass.
- the silicone skeleton-containing polymer is also referred to as a compound represented by the following formula (1) (hereinafter, also referred to as compound (1)) and a compound represented by the following formula (2) (hereinafter, also referred to as compound (2). ), A compound represented by the following formula (3) (hereinafter, also referred to as compound (3)), a compound represented by the following formula (4) (hereinafter, also referred to as compound (4)), and a following formula (hereinafter, also referred to as compound (4)).
- Platinum group metals such as platinum black and palladium.
- a carrier such as alumina, silica, carbon; rhodium-olefin complex; chlorotris (triphenylphosphine) rhodium (so-called Wilkinson catalyst); platinum chloride, platinum chloride acid or platinum chloride and vinyl group-containing siloxane (particularly) , Vinyl group-containing cyclic siloxane) and the like can be used.
- the polymerization temperature is preferably 40 to 150 ° C., more preferably 60 to 120 ° C., from the viewpoint that the catalyst is not deactivated and the polymerization can be completed in a short time.
- the polymerization time depends on the type and amount of the obtained resin, but is preferably about 0.5 to 100 hours, more preferably 0.5 to 30 hours in order to prevent the intervention of moisture in the polymerization system. After completion of the reaction, when a solvent is used, it is distilled off to obtain a silicone skeleton-containing polymer of the component (A).
- Each raw material compound has a hydrosilyl of the compound represented by the formula (1) and the compound represented by the formula (2) with respect to the total of the alkenyl groups contained in at least one selected from the compounds (3) to (6).
- the total of the groups is preferably 0.67 to 1.67, more preferably 0.83 to 1.25 in terms of molar ratio.
- the photoacid generator of the component (B) is not particularly limited as long as it decomposes by light irradiation and generates an acid, but one that generates an acid by irradiating light having a wavelength of 190 to 500 nm is preferable. Since the composition of the present invention has excellent compatibility with acid generators, a wide range of acid generators can be used.
- R 101 to R 105 examples include an alkyl group which may have a substituent such as a methyl group, an ethyl group, a propyl group, a butyl group, a cyclohexyl group, a norbornyl group, an adamantyl group and a 2-oxocyclohexyl group; a phenyl group.
- Examples of the glycime derivative include compounds represented by the following formula (B2-2).
- Butylsulfonyl) diazomethane bis (isobutylsulfonyl) diazomethane, bis (sec-butylsulfonyl) diazomethane, bis (n-propylsulfonyl) diazomethane, bis (isopropylsulfonyl) diazomethane, bis (tert-butylsulfonyl) diazomethane, bis (n- Pentylsulfonyl) diazomethane, bis (isopentylsulfonyl) diazomethane, bis (sec-pentylsulfonyl) diazomethane, bis (tert-pentylsulfonyl) diazomethane, 1-cyclohexylsulfonyl-1- (tert-butylsulfonyl) diazomethane, 1- Examples thereof include cyclohexylsulfonyl-1-
- the content of the (B1) onium salt-type photoacid generator is preferably higher than that of the (B2) non-onium salt-type photoacid generator, and specifically, the (B2) non-onium salt-type photoacid generator.
- the (B2) non-onium salt-type photoacid generator With respect to 100 parts by mass, 125 to 500 parts by mass is preferable, and 150 to 300 parts by mass is more preferable.
- urea condensate modified with formaldehyde or formaldehyde-alcohol examples include methoxymethylated urea condensate, ethoxymethylated urea condensate, propoxymethylated urea condensate and the like.
- quencher one represented by the following formula (E1) can also be used.
- the content of the surfactant is preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the component (A).
- Step (i) is a step of forming a photosensitive resin film on the substrate using the photosensitive resin composition.
- the substrate include a silicon wafer, a silicon wafer for a through electrode, a silicon wafer thinned by back polishing, a plastic or ceramic substrate, and Ni, Au, etc. on the entire surface of the substrate or a part of the substrate by an ion sputtering method or a plating method.
- Examples include a substrate having a metal.
- Substrates having either or both of grooves and holes having an opening width of 10 to 100 ⁇ m and a depth of 10 to 120 ⁇ m may be used. The opening width and depth of the grooves or holes on the substrate can be measured using a scanning electron microscope.
- Exposure may be done via a photomask.
- the photomask may be, for example, one in which a desired pattern is hollowed out.
- the material of the photomask is not particularly limited, but a photomask that shields light of the wavelength is preferable, and for example, a photomask provided with chromium or the like as a light-shielding film is preferably used.
- the film (iv) in which the pattern is formed is post-cured at 100 to 250 ° C., preferably 150 to 220 ° C. using an oven or a hot plate.
- the post-curing temperature is 100 to 250 ° C.
- the post-curing time is preferably 10 minutes to 10 hours, more preferably 10 minutes to 3 hours.
- the photosensitive dry film of the present invention includes a support film and a photosensitive resin film obtained from the photosensitive resin composition on the support film.
- the film thickness of the photosensitive resin film is preferably 5 to 200 ⁇ m, more preferably 10 to 100 ⁇ m.
- the photosensitive dry film of the present invention can be produced by applying the photosensitive resin composition on a substrate and drying it to form a photosensitive resin film.
- a film coater for producing an adhesive product can generally be used as a device for producing a photosensitive dry film.
- the film coater include a comma coater, a comma reverse coater, a multi coater, a die coater, a lip coater, a lip reverse coater, a direct gravure coater, an offset gravure coater, a three-bottom reverse coater, a four-bottom reverse coater, and the like. Be done.
- the thickness of the support film and the protective film is preferably 10 to 100 ⁇ m, more preferably 25 to 50 ⁇ m, from the viewpoint of stability in the production of the photosensitive dry film, curl on the winding core, and prevention of so-called curl.
- the pattern forming method using a photosensitive dry film is (I') A step of forming a photosensitive resin film on a substrate using the photosensitive dry film of the present invention. It includes (ii) a step of exposing the photosensitive resin film and (iii) a step of developing the exposed photosensitive resin film with a developing solution to form a pattern.
- Preheating may be performed as necessary in order to efficiently carry out the photocuring reaction of the photosensitive resin film and to improve the adhesion between the photosensitive resin film and the substrate.
- Pre-baking can be performed, for example, at 40 to 140 ° C. for about 1 minute to 1 hour.
- the photosensitive resin film attached to the substrate is the same as in the case of the pattern forming method using the photosensitive resin composition, (ii) the step of exposing the photosensitive resin film, and (iii) the exposed photosensitive resin.
- a pattern can be formed by a step of developing the film with a developing solution and, if necessary, (iv) a post-curing treatment.
- the supporting film of the photosensitive dry film is peeled off before prebaking or before PEB, or removed by another method depending on the process.
- the photosensitive resin composition and the photosensitive dry film of the present invention can also be used as a substrate adhesive for adhering two substrates.
- a substrate adhesive for adhering the substrate a substrate having a film formed by using the photosensitive resin composition of the present invention or a photosensitive dry film under suitable heat and pressure conditions is attached to a second substrate via the film.
- the film serves as an adhesive layer.
- One or both of the film-formed substrate and the second substrate may be chipped by dicing or the like.
- the heating temperature is 50 to 200 ° C. and the heating time is 1 to 60 minutes.
- a wafer bonder device can be used as the bonding device to bond wafers under reduced pressure while applying a load, or a flip-chip bonder device can be used to bond chips-wafers or chips-chips.
- Silicon wafers of the photosensitive resin compositions of Examples 1 to 8 and Comparative Examples 1 to 4 were subjected to a spin coater so as to have a thickness of 10 ⁇ m. Coated on. To remove the solvent, it was heated on a hot plate at 100 ° C. for 3 minutes and dried. The entire surface of the composition coated on the wafer is irradiated with light (wavelength 365 nm) using a high-pressure mercury lamp as a light source using a mask aligner MA8 manufactured by Susu Microtech Co., Ltd. without using a mask, and PEB is performed at 140 ° C. for 5 minutes. , PGMEA for 5 minutes.
- the film remaining after this operation was heated in an oven at 190 ° C. for 1 hour to obtain a resin film.
- the obtained wafer is cut using a dicing saw equipped with a dicing blade (DAD685 manufactured by DISCO Co., Ltd., spindle speed: 40,000 rpm, cutting speed: 20 mm / sec), and a 10 mm ⁇ 10 mm square test piece is cut. Obtained.
- the obtained test pieces (10 pieces each) were subjected to a heat cycle test (holding at -25 ° C for 10 minutes and holding at 125 ° C for 10 minutes for 1,000 cycles), and from the wafer of the resin film after the heat cycle test.
- the peeled state and the presence or absence of cracks were confirmed by an optical microscope. Those that did not cause peeling / cracking at all were good, those that had even one peeling were peeled off, and those that had even one crack were defined as cracks.
- the results are shown in Table 2.
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Abstract
Description
1.(A)シリコーン骨格含有ポリマー及び(B)光酸発生剤を含む感光性樹脂組成物であって、
(B)光酸発生剤が、(B1)オニウム塩である光酸発生剤及び(B2)オニウム塩以外の光酸発生剤を含む感光性樹脂組成物。
2.(A)シリコーン骨格含有ポリマーが、下記式(a1)~(a4)及び(b1)~(b4)で表される繰り返し単位を含むものである1の感光性樹脂組成物。
a1~a4及びb1~b4は、0≦a1<1、0≦a2<1、0≦a3<1、0≦a4<1、0≦b1<1、0≦b2<1、0≦b3<1、0≦b4<1、0<a1+a2+a3+a4<1、0<b1+b2+b3+b4<1及びa1+a2+a3+a4+b1+b2+b3+b4=1を満たす数である。
X1は、下記式(X1)で表される2価の基である。X2は、下記式(X2)で表される2価の基である。X3は、下記式(X3)で表される2価の基である。X4は、下記式(X4)で表される2価の基である。
3.更に、(C)架橋剤を含む1又は2の感光性樹脂組成物。
4.更に、(D)溶剤を含む1~3のいずれかの感光性樹脂組成物。
5.更に、(E)クエンチャーを含む1~4のいずれかの感光性樹脂組成物。
6.1~5のいずれかの感光性樹脂組成物から得られる感光性樹脂皮膜。
7.支持フィルムと、該支持フィルム上に6の感光性樹脂皮膜とを備える感光性ドライフィルム。
8.基板と、該基板上に6の感光性樹脂皮膜とを備える積層体。
9.(i)1~5のいずれかの感光性樹脂組成物を用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むパターン形成方法。
10.(i')7の感光性ドライフィルムを用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むパターン形成方法。
11.更に、(iv)パターンが形成された感光性樹脂皮膜を、100~250℃の温度で後硬化する工程を含む9又は10のパターン形成方法。
(A)成分のシリコーン骨格含有ポリマーとしては、特には限定されないが、下記式(a1)~(a4)及び(b1)~(b4)で表される繰り返し単位(以下、それぞれ繰り返し単位a1~a4及びb1~b4ともいう。)を含むものが好ましい。
前記シリコーン骨格含有ポリマーは、下記式(1)で表される化合物(以下、化合物(1)ともいう。)と、下記式(2)で表される化合物(以下、化合物(2)ともいう。)と、下記式(3)で表される化合物(以下、化合物(3)ともいう。)、下記式(4)で表される化合物(以下、化合物(4)ともいう。)、下記式(5)で表される化合物(以下、化合物(5)ともいう。)及び下記式(6)で表される化合物(以下、化合物(6)ともいう。)から選ばれる少なくとも1種とを、金属触媒存在下、付加重合させることにより製造することができる。
(B)成分の光酸発生剤は、光照射によって分解し、酸を発生するものであれば特に限定されないが、波長190~500nmの光を照射することによって酸を発生するものが好ましい。本発明の組成物は酸発生剤の相溶性に優れるため、幅広い酸発生剤を使用することができる。
本発明の感光性樹脂組成物は、更に(C)架橋剤を含むことが好ましい。前記架橋剤は、前述した(A)成分のフェノール性ヒドロキシ基、あるいはR13、R14、R23又はR24で表されるアルコキシ基と縮合反応を起こし、パターンの形成を容易になし得るための成分であると共に、硬化物の強度を更に上げるものである。
本発明の感光性樹脂組成物は、更に、(D)溶剤を含んでもよい。前記溶剤としては、(A)~(C)成分や、後述する各種添加剤が溶解可能な溶剤であれば特に限定されないが、これら成分の溶解性に優れていることから有機溶剤が好ましい。
本発明の感光性樹脂組成物は、更に(E)クエンチャーを含んでもよい。クエンチャーとしては、光酸発生剤より発生した酸が感光性樹脂皮膜内を拡散する際の拡散速度を抑制することができる化合物が適している。前記クエンチャーを配合することにより、解像度が向上し、露光後の感度変化を抑制し、基板依存性又は環境依存性を小さくし、露光余裕度やパターン形状を向上させることができる。
本発明の感光性樹脂組成物は、前述した各成分以外に、その他の添加剤を含んでもよい。その他の添加剤としては、例えば、塗布性を向上させるために慣用されている界面活性剤が挙げられる。
本発明の感光性樹脂組成物を用いるパターン形成方法は、
(i)本発明の感光性樹脂組成物を用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むものである。
本発明の感光性ドライフィルムは、支持フィルムと、該支持フィルム上に前記感光性樹脂組成物から得られる感光性樹脂皮膜とを備えるものである。
感光性ドライフィルムを用いるパターン形成方法は、
(i')本発明の感光性ドライフィルムを用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むものである。
更に、本発明の感光性樹脂組成物及び感光性ドライフィルムは、2つの基板を接着するための基板接着剤としても使用できる。基板の接着方法としては、好適な熱及び圧力の条件下で、本発明の感光性樹脂組成物又は感光性ドライフィルムを用いて皮膜を形成した基板を、該皮膜を介して第2の基板と接着させる方法が挙げられる。すなわち、前記皮膜が接着層となる。皮膜を形成した基板及び第2の基板のいずれか一方又は両方が、ダイシング加工等によりチップ化されることもある。
本発明の積層体は、基板と、該基板上に前記感光性樹脂皮膜とを備えるものである。前記基板としては、感光性樹脂組成物を用いるパターン形成方法において前述したものと同様のものが挙げられ、特に凹凸のある基板(例えば、開口幅が10~100μmかつ深さが10~120μmである溝及び孔のいずれか一方又は両方を有する基板)が好ましい。前記感光性樹脂皮膜を形成した積層体は、基板と該皮膜との密着性に優れたものとなり、また、基板が凹凸のある場合にも高い平坦性を有するものとなる。
[合成例1-1]樹脂1の合成
攪拌機、温度計、窒素置換装置及び還流冷却器を具備した3Lフラスコに、化合物(S-1)84.0g(0.2モル)、化合物(S-2)39.7g(0.15モル)及び化合物(S-3)46.5g(0.25モル)を加えた後、トルエン2,000gを加え、70℃に加熱した。その後、塩化白金酸トルエン溶液(白金濃度0.5質量%)1.0gを投入し、化合物(S-5)38.8g(0.20モル)及び化合物(S-6)(y1=38)553.4(0.20モル)を1時間かけて滴下した(ヒドロシリル基の合計/アルケニル基の合計=1/1(モル比))。滴下終了後、100℃まで加熱し、6時間熟成した後、反応溶液からトルエンを減圧留去し、樹脂1を得た。樹脂1は、1H-NMR(Bruker社製)により、繰り返し単位a1、b1、a2、b2、a3、b3、a4及びb4を含むものであることを確認した。樹脂1のMwは38,000、シリコーン含有率は67.2質量%であった。
攪拌機、温度計、窒素置換装置及び還流冷却器を具備した3Lフラスコに、化合物(S-2)53.0g(0.20モル)、化合物(S-4)172.0g(0.40モル)及び化合物(S-3)9.3g(0.05モル)を加えた後、トルエン2,000gを加え、70℃に加熱した。その後、塩化白金酸トルエン溶液(白金濃度0.5質量%)1.0gを投入し、化合物(S-5)29.1g(0.15モル)及び化合物(S-6)(y1=8)430.5g(0.7モル)を1時間かけて滴下した(ヒドロシリル基の合計/アルケニル基の合計=1/1(モル比))。滴下終了後、100℃まで加熱し、6時間熟成した後、反応溶液からトルエンを減圧留去し、樹脂2を得た。樹脂2は、1H-NMR(Bruker社製)により、繰り返し単位a1、b1、a2、b2、a3、b3、a4及びb4を含むものであることを確認した。樹脂2のMwは35,000、シリコーン含有率は53.6質量%であった。
攪拌機、温度計、窒素置換装置及び還流冷却器を具備した3Lフラスコに、化合物(S-1)84.0g(0.20モル)及び化合物(S-2)132.5g(0.50モル)を加えた後、トルエン2,000gを加え、70℃に加熱した。その後、塩化白金酸トルエン溶液(白金濃度0.5質量%)1.0gを投入し、化合物(S-5)58.2g(0.30モル)及び化合物(S-6)(y1=38)830.1g(0.3モル)を1時間かけて滴下した(ヒドロシリル基の合計/アルケニル基の合計=1/1(モル比))。滴下終了後、100℃まで加熱し、6時間熟成した後、反応溶液からトルエンを減圧留去し、樹脂3を得た。樹脂3は、1H-NMR(Bruker社製)により、繰り返し単位a1、b1、a3、b3、a4及びb4を含むものであることを確認した。樹脂3のMwは32,000、シリコーン含有率は75.5質量%であった。
攪拌機、温度計、窒素置換装置及び還流冷却器を具備した3Lフラスコに、化合物(S-2)132.5g(0.50モル)、化合物(S-4)107.5g(0.25モル)及び化合物(S-3)18.6g(0.10モル)を加えた後、トルエン2,000gを加え、70℃に加熱した。その後、塩化白金酸トルエン溶液(白金濃度0.5質量%)1.0gを投入し、化合物(S-5)9.7g(0.05モル)及び化合物(S-6)(y1=8)276.7g(0.45モル)を1時間かけて滴下した(ヒドロシリル基の合計/アルケニル基の合計=1/1(モル比))。滴下終了後、100℃まで加熱し、6時間熟成した後、反応溶液からトルエンを減圧留去し、樹脂4を得た。樹脂4は、1H-NMR(Bruker社製)により、繰り返し単位a2、b2、a3、b3、a4及びb4を含むものであることを確認した。樹脂4のMwは36,000、シリコーン含有率は58.4質量%であった。
[合成例2-1]アクリル樹脂1の合成
攪拌機、還流冷却器、不活性ガス導入口及び温度計を備えたフラスコに、2,2'-アゾビスイソブチロニトリル(AIBN)1g、PGMEA70g及びトルエン70gを仕込んだ。次に、アクリル酸32.6g及びメタクリル酸40gを加え、窒素雰囲気下で十分攪拌した後、80℃に昇温し、反応温度を80℃±2℃に保ちながら6時間攪拌し、アクリル樹脂1の溶液を得た。得られた溶液に、アクリル樹脂1の濃度が60質量%となるようにPGMEAを添加した。アクリル樹脂1のMwは15,000であった。
攪拌機、還流冷却器、不活性ガス導入口及び温度計を備えたフラスコに、AIBN1g、PGMEA70g及びトルエン70gを仕込んだ。次に、アクリル酸25gとアクリル酸メチル43.9gを加え、窒素雰囲気下で十分攪拌した後、80℃に昇温し、反応温度を80℃±2℃に保ちながら6時間攪拌し、アクリル樹脂2の溶液を得た。得られた溶液に、アクリル樹脂2の濃度が60質量%となるようにPGMEAを添加した。アクリル樹脂2のMwは17,000であった。
[実施例1~8、比較例1~4]
表1に記載の配合量に従って各成分を配合し、その後常温にて攪拌、混合、溶解した後、テフロン(登録商標)製1.0μmフィルターで精密濾過を行い、実施例1~8及び比較例1~4の感光性樹脂組成物を得た。
フィルムコーターとしてダイコーター、支持フィルムとしてポリエチレンテレフタレートフィルム(厚さ38μm)を用いて、実施例1~8及び比較例1~4の感光性樹脂組成物をそれぞれ前記支持フィルム上に塗布した。次いで、100℃に設定された熱風循環オーブン(長さ4m)を5分間で通過させることにより乾燥し、支持フィルム上に感光性樹脂皮膜を形成し、感光性ドライフィルムを得た。前記感光性樹脂皮膜の上から、保護フィルムとしてのポリエチレンフィルム(厚さ40μm)をラミネートロールで圧力1MPaにて貼り合わせ、保護フィルム付き感光性ドライフィルムを作製した。各感光性樹脂皮膜の膜厚は表2に記載した。なお、膜厚は光干渉式膜厚測定機((株)SCREENセミコンダクターソリューションズ製)により測定した。
(1)パターン形成性の評価
前記感光性ドライフィルムは、保護フィルムを剥離し、真空ラミネーターTEAM-100RF((株)タカトリ製)を用いて、真空チャンバー内の真空度80Paに設定し、支持フィルム上の感光性樹脂皮膜を凹凸のあるシリコン基板に密着させた。温度条件は100℃とした。常圧に戻した後、前記基板を真空ラミネーターから取り出し、支持フィルムを剥離した。次に、基板との密着性を高めるため、ホットプレートにより110℃で5分間プリベークを行った。得られた感光性樹脂皮膜に対してラインアンドスペースパターン及びコンタクトホールパターンを形成するためにマスクを介し、365nmの露光条件でコンタクトアライナ型露光装置を使用して露光した。露光後、ホットプレートにより130℃で5分間PEBを行い、冷却し、PGMEAにて300秒間スプレー現像を行い、パターンを形成した。
実施例1~8及び比較例1~4の各感光性樹脂組成物を、スピンコーターを用いて厚さが10μmになるようにシリコンウエハにコートした。溶剤を除去するため、ホットプレート上で、100℃で3分間加熱し、乾燥させた。
ウエハに塗布した組成物全面に対し、マスクを介さず、ズース・マイクロテック社のマスクアライナーMA8を用い、高圧水銀灯を光源とする光(波長365nm)を照射し、140℃で5分間PEBを行い、PGMEAに5分間浸漬した。この操作後に残った皮膜を190℃のオーブンで1時間加熱し、樹脂皮膜を得た。
得られたウエハを、ダイシングブレードを備えるダイシングソー((株)DISCO製DAD685、スピンドル回転数:40,000rpm、切断速度:20mm/sec)を使用して切断し、10mm×10mm角の試験片を得た。得られた試験片(各10片づつ)をヒートサイクル試験(-25℃で10分間保持、125℃で10分間保持を1,000サイクル繰り返す)に供し、ヒートサイクル試験後の樹脂フィルムのウエハからの剥離状態、クラックの有無を光学顕微鏡により確認した。全く剥離・クラックを生じなかったものを良好、1つでも剥離を生じたものを剥離、1つでもクラックが生じたものをクラックとした。結果を表2に示す。
信頼性評価で作製した試験片の試験前質量を測定し、その後、試験片を200℃に加熱したオーブンに1,000時間放置し、試験片をオーブンから取り出し、質量を測定した。試験前後の質量変化率が0.5%未満だった場合を良好、試験前後の質量変化率が0.5%以上だった場合を不良として判定した。結果を表2に示す。
Claims (11)
- (A)シリコーン骨格含有ポリマー及び(B)光酸発生剤を含む感光性樹脂組成物であって、
(B)光酸発生剤が、(B1)オニウム塩である光酸発生剤及び(B2)オニウム塩以外の光酸発生剤を含む感光性樹脂組成物。 - (A)シリコーン骨格含有ポリマーが、下記式(a1)~(a4)及び(b1)~(b4)で表される繰り返し単位を含むものである請求項1記載の感光性樹脂組成物。
a1~a4及びb1~b4は、0≦a1<1、0≦a2<1、0≦a3<1、0≦a4<1、0≦b1<1、0≦b2<1、0≦b3<1、0≦b4<1、0<a1+a2+a3+a4<1、0<b1+b2+b3+b4<1及びa1+a2+a3+a4+b1+b2+b3+b4=1を満たす数である。
X1は、下記式(X1)で表される2価の基である。X2は、下記式(X2)で表される2価の基である。X3は、下記式(X3)で表される2価の基である。X4は、下記式(X4)で表される2価の基である。
- 更に、(C)架橋剤を含む請求項1又は2記載の感光性樹脂組成物。
- 更に、(D)溶剤を含む請求項1~3のいずれか1項記載の感光性樹脂組成物。
- 更に、(E)クエンチャーを含む請求項1~4のいずれか1項記載の感光性樹脂組成物。
- 請求項1~5のいずれか1項記載の感光性樹脂組成物から得られる感光性樹脂皮膜。
- 支持フィルムと、該支持フィルム上に請求項6記載の感光性樹脂皮膜とを備える感光性ドライフィルム。
- 基板と、該基板上に請求項6記載の感光性樹脂皮膜とを備える積層体。
- (i)請求項1~5のいずれか1項記載の感光性樹脂組成物を用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むパターン形成方法。 - (i')請求項7記載の感光性ドライフィルムを用いて基板上に感光性樹脂皮膜を形成する工程、
(ii)前記感光性樹脂皮膜を露光する工程、及び
(iii)前記露光した感光性樹脂皮膜を現像液で現像してパターンを形成する工程
を含むパターン形成方法。 - 更に、(iv)パターンが形成された感光性樹脂皮膜を、100~250℃の温度で後硬化する工程を含む請求項9又は10記載のパターン形成方法。
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