WO2021029419A1 - 感光性樹脂組成物、パターン硬化膜の製造方法、硬化膜、層間絶縁膜、カバーコート層、表面保護膜及び電子部品 - Google Patents
感光性樹脂組成物、パターン硬化膜の製造方法、硬化膜、層間絶縁膜、カバーコート層、表面保護膜及び電子部品 Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/306—Polyimides or polyesterimides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/065—Polyamides; Polyesteramides; Polyimides
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
- C08G73/1053—Polyimides containing oxygen in the form of ether bonds in the main chain with oxygen only in the tetracarboxylic moiety
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
- C08G73/1071—Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
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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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/12—Unsaturated polyimide precursors
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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
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C09D179/085—Unsaturated polyimide precursors
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic 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
- G03F7/027—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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/037—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being 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
- G03F7/038—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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0388—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the side chains of the photopolymer
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- 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
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- 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
- the present invention relates to a photosensitive resin composition, a method for producing a pattern cured film, a cured film, an interlayer insulating film, a cover coat layer, a surface protective film, and an electronic component.
- Polyimide and the like having excellent heat resistance, electrical properties, mechanical properties, etc. are used for the surface protective film and the interlayer insulating film of the semiconductor element.
- photosensitive resin compositions in which photosensitive properties are imparted to these resins themselves have been used, and by using this, the manufacturing process of a pattern cured film can be simplified and complicated manufacturing processes can be shortened (for example, Patent Documents). 1).
- NMP N-methylpyrrolidone
- GBL low-toxicity ⁇ -butyrolactone
- An object of the present invention is to provide a photosensitive resin composition having low toxicity and having a small change in the residual film ratio when stored for a long period of time, that is, having excellent storage stability. It also includes a method for producing a pattern cured film using the photosensitive resin composition, a cured film of the photosensitive resin composition, an interlayer insulating film produced using the cured film, and the like, and the interlayer insulating film and the like. It is to provide electronic components.
- R 11 is a group containing a substituted or unsubstituted benzoyl group, a substituted or unsubstituted fluorenyl group, or a substituted or unsubstituted carbazolyl group.
- R 12 is a group containing an alkyl group having 1 to 12 carbon atoms, a group containing a cycloalkyl group having 4 to 10 carbon atoms, a group containing a phenyl group, or a group containing a tolyl group.
- R 13 is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 20 carbon atoms. ) 2.
- the component (A) is a polyimide precursor having a structural unit represented by the following formula (1).
- X 1 is a tetravalent aromatic group.
- Y 1 is a divalent aromatic group.
- R 1 and R 2 are independently hydrogen atoms, and the following formula (2) It is a group represented by or an aliphatic hydrocarbon group having 1 to 4 carbon atoms, and at least one of R 1 and R 2 is a group represented by the following formula (2).-COOR 1 group and -CONH- The groups are in ortho positions with each other, and the -COOR 2 groups and -CO- groups are in ortho positions with each other.)
- R 3 to R 5 are independently hydrogen atoms or aliphatic hydrocarbon groups having 1 to 3 carbon atoms.
- M is an integer of 1 to 10.
- An interlayer insulating film, a cover coat layer or a surface protective film prepared by using the cured film according to 14.12 or 13.
- An electronic component comprising the interlayer insulating film, cover coat layer or surface protective film according to 15.14.
- the present invention is not limited to the following embodiments.
- a or B may include either A or B, and may include both.
- the term “process” is included in this term not only as an independent process but also as long as the desired action of the process is achieved even if it cannot be clearly distinguished from other processes. ..
- the numerical range indicated by using "-” indicates a range including the numerical values before and after "-" as the minimum value and the maximum value, respectively.
- the content of each component in the composition is the total amount of the plurality of substances present in the composition unless otherwise specified, when a plurality of substances corresponding to each component are present in the composition. means.
- the exemplary materials may be used alone or in combination of two or more unless otherwise specified.
- the term “(meth) acrylic group” means “acrylic group” and “methacrylic group”
- “(meth) acrylate” means “methacrylate” or "acrylate”.
- the photosensitive resin composition of the present invention is (A) a polyimide precursor having a polymerizable unsaturated bond (hereinafter, also referred to as “component (A)”), and a compound represented by the formula (B) (11). Includes a photopolymerization initiator (hereinafter, also referred to as “component (B)”), (C) thermal radical generator (hereinafter, also referred to as “component (C)”), and (D) ⁇ -butyrolactone. It contains a solvent (hereinafter, also referred to as “component (D)”).
- the photosensitive resin composition of the present invention is preferably a negative photosensitive resin composition.
- R 11 is a group containing a substituted or unsubstituted benzoyl group, a substituted or unsubstituted fluorenyl group, or a substituted or unsubstituted carbazolyl group.
- R 12 is a group containing an alkyl group having 1 to 12 carbon atoms, a group containing a cycloalkyl group having 4 to 10 carbon atoms, a group containing a phenyl group, or a group containing a tolyl group.
- R 13 is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 20 carbon atoms.
- the photosensitive resin composition of the present invention is excellent in storage stability despite the use of GBL as a solvent.
- the reason why such an effect is exerted is not always clear, but it is presumed as follows. That is, in the compound represented by the formula (11) in the component (B), the site represented by R 13 corresponds to the radical generation site, but photopolymerization is performed by adopting a structure that can cause steric hindrance at the site. Since the solvation of the initiator is suppressed, it is considered that the radical generation during light irradiation is not inhibited or the inhibition is reduced, and as a result, the storage stability is improved. Storage stability can be evaluated by the change in the residual film ratio described in Examples. That is, it can be evaluated that the smaller the change in the residual film ratio, the better the storage stability.
- each component will be described.
- Component (A) Polyimide precursor having a polymerizable unsaturated bond
- the component (A) is not particularly limited as long as it is a polyimide precursor having a polymerizable unsaturated bond, but has high transmittance when i-ray is used as a light source during patterning, and when cured at a low temperature of 200 ° C. or lower.
- a polyimide precursor showing high cured film properties is preferable.
- Examples of the polymerizable unsaturated bond include a double bond between carbon atoms.
- the component (A) is preferably a polyimide precursor having a structural unit represented by the following formula (1).
- X 1 is a tetravalent aromatic group.
- Y 1 is a divalent aromatic group.
- R 1 and R 2 are independently hydrogen atoms, and the following formula (2) It is a group represented by, or an aliphatic hydrocarbon group having 1 to 4 carbon atoms, and at least one of R 1 and R 2 is a group represented by the following formula (2).-COOR 1 group and -CONH.
- R 3 to R 5 are independently hydrogen atoms or aliphatic hydrocarbon groups having 1 to 3 carbon atoms.
- M is an integer of 1 to 10 (preferably an integer of 2 to 10). , More preferably an integer of 2 to 5, still more preferably 2 or 3)).
- the X 1 tetravalent aromatic group of the formula (1) may be a tetravalent aromatic hydrocarbon group (for example, 6 to 20 carbon atoms), or a tetravalent aromatic heterocyclic group (atom). The number may be, for example, 5 to 20). X 1 is preferably a tetravalent aromatic hydrocarbon group.
- Examples of the tetravalent aromatic hydrocarbon group of X 1 include, but are not limited to, the groups shown below.
- Z 1 and Z 2 are divalent groups or single bonds that are not conjugate to the benzene ring to which they are attached independently.
- Z 3 is an ether bond (-O-) or a sulfide bond (-O-). S-).
- the divalent groups of Z 1 and Z 2 are preferably —O—, —S—, methylene group, bis (trifluoromethyl) methylene group, or difluoromethylene group, more preferably —O—.
- Z 3 is preferably —O—.
- the divalent aromatic group of Y 1 in the formula (1) may be a divalent aromatic hydrocarbon group (for example, 6 to 20 carbon atoms), or a divalent aromatic heterocyclic group (atom). The number may be, for example, 5 to 20). Y 1 is preferably a divalent aromatic hydrocarbon group.
- Examples of the divalent aromatic hydrocarbon group of Y 1 include, but are not limited to, a group represented by the following formula (3).
- R 41 to R 48 are monovalent organic groups each independently having a hydrogen atom, a monovalent aliphatic hydrocarbon group or a halogen atom.
- R 41 to R 48 preferably 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms
- a methyl group is preferable.
- the monovalent organic group having a halogen atom (preferably a fluorine atom) of R 41 to R 48 is a monovalent aliphatic hydrocarbon group having a halogen atom (preferably 1 to 10 carbon atoms, more preferably 1 carbon atom). ⁇ 6) is preferable, and a trifluoromethyl group is preferable.
- R 42 and R 43 may be monovalent aliphatic hydrocarbon groups (for example, methyl groups), and R 41 and R 44 to R 48 may be hydrogen atoms.
- Y 1 a divalent group obtained by removing two hydrogen atoms from diphenyl ether or a divalent group obtained by removing two hydrogen atoms from benzene can also be used.
- Examples of the aliphatic hydrocarbon group having 1 to 4 carbon atoms (preferably 1 or 2) of R 1 and R 2 of the formula (1) include a methyl group, an ethyl group, an n-propyl group, a 2-propyl group and an n-. Examples include a butyl group.
- R 1 and R 2 are a group represented by formula (2), and preferably both R 1 and R 2 are groups represented by formula (2).
- Examples of the aliphatic hydrocarbon group having 1 to 3 carbon atoms (preferably 1 or 2) of R 3 to R 5 of the formula (2) include a methyl group, an ethyl group, an n-propyl group and a 2-propyl group. Be done. Methyl groups are preferred.
- the polyimide precursor having the structural unit represented by the formula (1) is, for example, a tetracarboxylic acid dianhydride represented by the following formula (4) and a diamino compound represented by the following formula (5).
- a polyamic acid is produced by reacting in an organic solvent such as N-methylpyrrolidone, a compound represented by the following formula (6) is added, and the reaction is carried out in an organic solvent to introduce an ester group entirely or partially. It can be manufactured by doing so.
- X 1 is a group corresponding to X 1 of the formula (1).
- Equation in (5), Y 1 is as defined in formula (1).
- Equation (6), R 3 ⁇ R 5 and m are as defined in formula (2).
- a polyimide precursor having a structural unit represented by the formula (1) can be prepared, for example, by reacting a tetracarboxylic dianhydride represented by the formula (4) with a compound represented by the formula (6) to form an ester. It can also be produced and then reacted with a diamino compound represented by the formula (5).
- the tetracarboxylic dianhydride represented by the formula (4) and the diamino compound represented by the formula (5) may be used alone or in combination of two or more.
- the content of the structural unit represented by the formula (1) is preferably 50% mol or more, more preferably 80 mol% or more, and 90 mol% or more with respect to all the structural units of the component (A). More preferred.
- the upper limit is not particularly limited and may be 100 mol%.
- the component (A) may have a structural unit other than the structural unit represented by the formula (1).
- Examples of the structural unit other than the structural unit represented by the formula (1) include the structural unit represented by the following formula (7).
- X 2 is a tetravalent aromatic group.
- Y 2 is a divalent aromatic group.
- R 51 and R 52 are independently hydrogen atoms or 1 to 4 carbon atoms, respectively. -COOR 51 groups and -CONH- groups are in ortho positions with each other, and -COOR 52 groups and -CO- groups are in ortho positions with each other.
- Examples of the X 2 tetravalent aromatic group of the formula (7) include the same groups as the X 1 tetravalent aromatic group of the formula (1).
- Examples of the divalent aromatic group of Y 2 include the same groups as the divalent aromatic group Y 1 of the formula (1).
- Examples of the aliphatic hydrocarbon group having 1 to 4 carbon atoms of R 51 and R 52 include the same group as the aliphatic hydrocarbon group having 1 to 4 carbon atoms of R 1 and R 2 of the formula (1).
- the content of the structural unit other than the structural unit represented by the formula (1) is preferably less than 50 mol% with respect to the total structural unit of the component (A).
- the structural unit other than the structural unit represented by the formula (1) one type may be used alone, or two or more types may be combined.
- the ratio of the carboxy group esterified with the group represented by the formula (2) to the total carboxy group and the total carboxy ester in the polyimide precursor is 50 mol% or more.
- 60 to 100 mol% is more preferable, and 70 to 90 mol% is more preferable.
- the molecular weight of the component (A) is not particularly limited, but the number average molecular weight is preferably 10,000 to 200,000.
- the number average molecular weight is determined by measuring by gel permeation chromatography and converting using a standard polystyrene calibration curve.
- R 11 is a substituted or unsubstituted benzoyl group, a substituted or unsubstituted fluorenyl group, or a group containing a substituted or unsubstituted carbazolyl group (for example, a carbazolylcarbonyl group, a carbazolyl (for example, carbazolyl). It is an alkyl group having 1 to 6 carbon atoms, preferably 1 to 4) alkyl group (preferably a carbazolyl methyl group or a carbazolyl ethyl group).
- R 12 is a group containing an alkyl group having 1 to 12 carbon atoms, a group containing a cycloalkyl group having 4 to 10 carbon atoms, a group containing a phenyl group, or a group containing a tolyl group.
- R 13 is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 20 carbon atoms.
- R 11 is preferably a substituted or unsubstituted benzoyl group.
- the phenylthio group Etyloloxy group, alkyl group having 1 to 20 carbon atoms (for example, methyl group, ethyl group, n-propyl group), halogenated (preferably fluorinated) may have 1 to 20 carbon atoms (preferably 1).
- R 12 is preferably an alkyl group having 1 to 12 carbon atoms or a group containing a cycloalkyl group having 4 to 10 carbon atoms, and more preferably an alkyl group having 1 to 8 carbon atoms or a cycloalkylmethyl group ( The cycloalkyl moiety has 4 to 10 carbon atoms).
- R 13 is a substituted or unsubstituted aromatic hydrocarbon group having 6 to 20 carbon atoms, preferably a substituted or unsubstituted aromatic hydrocarbon group having 6 to 15 carbon atoms, and more preferably a substituted or unsubstituted aromatic hydrocarbon group. It is an unsubstituted phenyl group. Examples of the substituent include an alkyl group having 1 to 12 carbon atoms.
- the compound represented by the formula (11) is preferably a compound represented by the following formula (12).
- R 12 and R 13 are the same as the above formula (11).
- R 14 is a monovalent organic group.
- A is an integer of 0 to 5.
- Examples of the organic group of R 14 include -OH, -COOH, -O (CH 2 ) OH, -O (CH 2 ) 2 OH, -COO (CH 2 ) OH, or -COO (CH 2 ) 2 OH. It is preferably -O (CH 2 ) OH, -O (CH 2 ) 2 OH, -COO (CH 2 ) OH, or -COO (CH 2 ) 2 OH, and -O (CH 2 ) 2 More preferably, it is OH or -COO (CH 2 ) 2 OH. a is preferably 0.
- one kind of the compound represented by the formula (11) may be used alone, or two or more kinds may be used in combination.
- a compound represented by the formula (11) and a photopolymerization initiator other than the compound represented by the formula (11) may be used in combination.
- Other photopolymerization initiator for example, R 13 in the compound represented by formula (11) or (12), an aromatic non-hydrocarbon groups of the substituted or unsubstituted C 6-20 Examples include compounds. Examples of the "group that is not a substituted or unsubstituted aromatic hydrocarbon group having 6 to 20 carbon atoms" include, but are not limited to, an alkyl group having 1 to 12 carbon atoms.
- examples of other photopolymerization initiators include compounds represented by the following formula (15).
- R 61 is an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or a cycloalkyl group having 4 to 10 carbon atoms
- R 62 is an alkyl group having 1 to 12 carbon atoms.
- R 65 is an alkyl group having 1 to 6 carbon atoms
- R 66 is an alkyl group having 1 to 12 carbon atoms.
- I is an integer from 0 to 5.
- the component (B) and the other photopolymerization initiator other than the compound represented by the formula (11) are substantially only the compound represented by the formula (11) or substantially represented by the formula (11). Only the compound and the compound represented by the formula (15) may be used, only the compound represented by the formula (11), or the compound represented by the formula (11) and the compound represented by the formula (15). May be only. Further, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more of the photopolymerization initiator other than the component (B) and the compound represented by the formula (11).
- the content of the component (B) (or the total content of the component (B) and the content of the photopolymerization initiator other than the compound represented by the formula (11)) is 100 parts by mass of the component (A). On the other hand, it is preferably 0.1 to 20 parts by mass, more preferably 0.1 to 10 parts by mass, and further preferably 0.1 to 5 parts by mass.
- the content of the component (B) is 0.1 part by mass or more, 0.5 part by mass or more, 0.7 part by mass or more, 1.0 part by mass or more with respect to 100 parts by mass of the component (A). It may be 1.2 parts by mass or more or 1.5 parts by mass or more. With such a content, storage stability can be further improved.
- composition of the present invention contains (C) a thermal radical generator.
- Organic peroxide is preferable as the component (C).
- the organic peroxide include dialkyl peroxide, ketone peroxide, peroxyketal, hydroperoxide, diacyl peroxide, peroxydicarbonate, peroxyester and the like, and dialkyl peroxide is preferable.
- Dialkyl peroxide is a compound represented by the following general formula.
- ROO-OR' In the formula, R and R'are independently substituted or unsubstituted alkyl groups. Examples of the substituent include an aryl group having 6 to 10 carbon atoms. The alkyl group has, for example, 1 to 20 or 1 to 10 carbon atoms.
- dialkyl peroxide examples include dicumyl peroxide (bis (1-phenyl-1-methylethyl) peroxide), di-t-butyl peroxide, and di (2-t-butylperoxyisopropyl) benzene, 2. , 5-Dimethyl-2,5-di (t-butylperoxy) hexane, t-butylcumylperoxide, di-t-hexylperoxide, 2,5-dimethyl-2,5-di (t-butylperoxy) Oxy) Hexane-3 and the like can be mentioned.
- the organic peroxide is preferably a compound having a 1-hour half-life temperature of 50 ° C. or higher and 200 ° C. or lower, and a compound having a 1-hour half-life temperature of 50 ° C. or higher and 175 ° C. or lower is more preferable from the viewpoint of promoting the polymerization reaction at a lower temperature. preferable.
- the 1-hour half-life temperature is measured as follows.
- a 0.1 mol / L solution is prepared by dissolving the organic peroxide in benzene and sealed in a nitrogen-substituted glass tube. This is immersed in a constant temperature bath set at a predetermined temperature for thermal decomposition, the relationship of time (t) lna / (ax) is plotted, k is obtained from the slope of the obtained straight line, and the half-life (half-life) is obtained from the following formula. t 1/2 ) is calculated.
- the content of the component (C) is preferably 0.1 to 20 parts by mass, more preferably 0.2 to 20 parts by mass, and further preferably 0.3 to 10 parts by mass with respect to 100 parts by mass of the component (A). preferable.
- the photosensitive resin composition of the present invention contains ⁇ -butyrolactone as a solvent.
- the photosensitive resin composition of the present invention may contain a solvent other than ⁇ -butyrolactone.
- Examples of other solvents include the following compounds.
- Examples of esters include ethyl acetate, -n-butyl acetate, isobutyl acetate, amyl formate, isoamyl acetate, isobutyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl lactate, ethyl lactate, ⁇ -caprolactone ⁇ .
- alkyl oxyacetate eg, methyl oxyacetate, ethyl oxyacetate, butyl oxyacetate (eg, methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, etc.)
- 3-oxy Alkyl propionates eg, methyl 3-oxypropionate, ethyl 3-oxypropionate, etc.
- 2-oxypropionate alkyl esters eg, methyl 2-oxypropionate, ethyl 2-oxypropionate, propyl 2-oxypropionate, etc.
- Methyl, ethyl 2-oxobutate, etc . as ethers, for example, diethylene glycol dimethyl ether, tetrahydrofuran, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono Butyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, etc .; as ketones, for example, methyl ethyl ketone, cyclohexanone, cyclopentanone, 2-heptanone, 3-heptanone, N-Methyl-2- Pyrrolidone and the like; as aromatic hydrocarbons such as toluen
- the solvent (component (D)) used in the photosensitive resin composition of the present invention may be substantially only ⁇ -butyrolactone or may be only ⁇ -butyrolactone. Further, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more of the solvent (component (D)) used in the photosensitive resin composition of the present invention. 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or 100% by mass may be ⁇ -butyrolactone.
- the content of the solvent (component (D)) in the photosensitive resin composition is not particularly limited, but is generally 50 to 1000 parts by mass with respect to 100 parts by mass of the component (A).
- the photosensitive resin composition of the present invention contains a thermal base generator, a polymerizable monomer, a coupling agent, a surfactant or a leveling agent, a rust preventive, a polymerization inhibitor, a sensitizer and the like. You may.
- polymerizable monomer examples include diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, trimethylolpropandi (meth) acrylate, and trimethylolpropantri (meth) acrylate, 1.
- the content of the polymerizable monomer is preferably 1 to 100 parts by mass and more preferably 1 to 75 parts by mass with respect to 100 parts by mass of the component (A). It is more preferably about 50 parts by mass.
- the coupling agent usually reacts with the component (A) to crosslink in the heat treatment after development, or the coupling agent itself polymerizes in the step of heat treatment. Thereby, the adhesiveness between the obtained cured film and the substrate can be further improved.
- a silane coupling agent is preferable as the coupling agent.
- ureidomethyltrimethoxysilane ureidomethyltriethoxysilane, 2-ureidoethyltrimethoxysilane, 2-ureidoethyltriethoxysilane, 3-ureidopropyltrimethoxysilane, 3-ureidopropyltriethoxysilane, 4-ureidobutyl Examples thereof include trimethoxysilane and 4-ureidobutyltriethoxysilane, and 3-ureidopropyltriethoxysilane is preferable.
- a silane coupling agent having a hydroxy group or a glycidyl group may be used, for example, methylphenylsilanediol, ethylphenylsilanediol, n-propylphenylsilanediol, isopropylphenylsilanediol, n-butylphenylsilanediol, etc.
- R 73 is a monovalent organic group having a hydroxy group or a glycidyl group
- R 74 and R 75 are independently alkyl groups having 1 to 5 carbon atoms.
- O is 1 It is an integer of ⁇ 10, and p is an integer of 1 to 3.
- Examples of the compound represented by the formula (42) include hydroxymethyltrimethoxysilane, hydroxymethyltriethoxysilane, 2-hydroxyethyltrimethoxysilane, 2-hydroxyethyltriethoxysilane, 3-hydroxypropyltrimethoxysilane, and 3-.
- a silane coupling agent having an amino group may be used, for example, bis (2-hydroxymethyl) -3-aminopropyltriethoxysilane, bis (2-hydroxymethyl) -3-aminopropyltrimethoxysilane. , Bis (2-glycidoxymethyl) -3-aminopropyltriethoxysilane, bis (2-hydroxymethyl) -3-aminopropyltrimethoxysilane and the like.
- a silane coupling agent having an amide bond may be used, and examples thereof include compounds represented by the following formula (43).
- R 76 is a hydroxy group or a glycidyl group
- q and r are independently integers of 1 to 3
- R 77 is a methyl group, an ethyl group or a propyl group.
- the content of the silane coupling agent is preferably 0.1 to 20 parts by mass, more preferably 1 to 10 parts by mass, and 0.3 by mass with respect to 100 parts by mass of the component (A). To 10 parts by mass is more preferable.
- surfactant or leveling agent examples include polyoxyethylene uralyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octylphenol ether, and the like, and commercial products include the trade name "Megafax”. F171 ",” F173 ",” R-08 “(above, manufactured by DIC Co., Ltd.), product name” Florard FC430 “,” FC431 “(above, manufactured by 3M Japan Co., Ltd.), trade name” Organosiloxane Polymer KP341 ", Examples thereof include “KBM303", “KBM403", and “KBM803” (all manufactured by Shin-Etsu Chemical Industry Co., Ltd.).
- the content of the surfactant or the leveling agent is preferably 0.01 to 10 parts by mass, more preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the component (A). It is preferable, and more preferably 0.05 to 3 parts by mass.
- a rust preventive By containing a rust preventive, it is possible to suppress corrosion and prevent discoloration of copper and copper alloys.
- the rust preventive include a triazole derivative and a tetrazole derivative.
- the content of the rust inhibitor is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, and 0.5 to 0.5 to 100 parts by mass with respect to 100 parts by mass of the component (A). 3 parts by mass is more preferable.
- polymerization inhibitor By containing a polymerization inhibitor, good storage stability can be ensured.
- the polymerization inhibitor include a radical polymerization inhibitor, a radical polymerization inhibitor and the like.
- the polymerization inhibitor include p-methoxyphenol, diphenyl-p-benzoquinone, benzoquinone, hydroquinone, pyrogallol, phenothiazine, resorcinol, orthodinitrobenzene, paradinitrobenzene, metadinitrobenzene, phenanthraquinone, and N-phenyl-2-.
- Examples thereof include naphthylamine, cuperon, 2,5-tolucinone, tannic acid, parabenzylaminophenol, and nitrosoamines.
- the content of the polymerization inhibitor is 0 with respect to 100 parts by mass of the component (A) from the viewpoint of storage stability of the photosensitive resin composition and heat resistance of the obtained cured film. It is preferably 0.01 to 30 parts by mass, more preferably 0.01 to 10 parts by mass, and even more preferably 0.05 to 5 parts by mass.
- sensitizer examples include 7-N, N-diethylaminocoumarin, 7-diethylamino-3-tenonylcoumarin, 3,3'-carbonylbis (7-N, N-diethylamino) coumarin, 3,3'-.
- the content is more preferably 0.1 to 3.0 parts by mass, and 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the (a) polyimide precursor. It is more preferable to do so.
- the photosensitive resin composition of the present invention essentially comprises the components (A) to (D), as well as a thermobase generator, a cross-linking agent (polymerizable monomer), a coupling agent, a surfactant or a leveling agent, and a protective agent. It is composed of one or more components selected from the group consisting of rust agents, polymerization inhibitors, and sensitizers, and may contain other unavoidable impurities as long as the effects of the present invention are not impaired. For example, 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, 99.5% by mass or more, 99.9% by mass or more of the photosensitive resin composition of the present invention.
- the cured film of the present invention can be obtained by curing the above-mentioned photosensitive resin composition.
- the cured film of the present invention may be used as a pattern cured film or may be used as a cured film without a pattern.
- the film thickness of the cured film of the present invention is preferably 5 to 20 ⁇ m.
- the above-mentioned photosensitive resin composition is applied onto a substrate and dried to form a photosensitive resin film, and the photosensitive resin film is pattern-exposed to form a resin film.
- the process includes a step of obtaining the pattern resin film, a step of developing the resin film after the pattern exposure with an organic solvent to obtain the pattern resin film, and a step of heat-treating the pattern resin film. Thereby, a pattern cured film can be obtained.
- the method for producing a cured film without a pattern includes, for example, a step of forming the above-mentioned photosensitive resin film and a step of heat treatment. Further, an exposure step may be provided.
- the substrate examples include a glass substrate, a semiconductor substrate such as a Si substrate (silicon wafer), a metal oxide insulator substrate such as a TiO 2 substrate and a SiO 2 substrate, a silicon nitride substrate, a copper substrate, and a copper alloy substrate.
- a semiconductor substrate such as a Si substrate (silicon wafer)
- a metal oxide insulator substrate such as a TiO 2 substrate and a SiO 2 substrate
- silicon nitride substrate silicon nitride substrate
- copper substrate examples include a copper alloy substrate.
- Drying can be performed using a hot plate, an oven, or the like.
- the drying temperature is preferably 90 to 150 ° C, more preferably 90 to 120 ° C.
- the drying time is preferably 30 seconds to 5 minutes. Drying may be performed twice or more. As a result, a photosensitive resin film obtained by forming the above-mentioned photosensitive resin composition into a film can be obtained.
- the film thickness of the photosensitive resin film is preferably 5 to 100 ⁇ m, more preferably 8 to 50 ⁇ m, and even more preferably 10 to 30 ⁇ m.
- the pattern exposure exposes a predetermined pattern through, for example, a photomask.
- the active light to irradiate include ultraviolet rays such as i-rays, visible light, and radiation, but i-rays are preferable.
- a parallel exposure machine, a projection exposure machine, a stepper, a scanner exposure machine and the like can be used as the exposure apparatus.
- a patterned resin film By developing, a patterned resin film (patterned resin film) can be obtained.
- a negative photosensitive resin composition when used, the unexposed portion is removed with a developing solution.
- the organic solvent used as the developing solution the good solvent of the photosensitive resin film can be used alone, or the good solvent and the poor solvent can be appropriately mixed and used.
- Good solvents include N-methylpyrrolidone, N-acetyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone, ⁇ -acetyl-gamma-butyrolactone, cyclopentanone, cyclohexanone.
- the poor solvent include toluene, xylene, methanol, ethanol, isopropanol, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether and water.
- a surfactant may be added to the developer.
- the amount to be added is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the developing solution.
- the developing time can be, for example, twice the time required to immerse and dissolve the photosensitive resin film.
- the developing time varies depending on the component (A) used, but is preferably 10 seconds to 15 minutes, more preferably 10 seconds to 5 minutes, and even more preferably 20 seconds to 5 minutes from the viewpoint of productivity.
- a rinse solution As the rinsing solution, distilled water, methanol, ethanol, isopropanol, toluene, xylene, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether and the like may be used alone or in an appropriate mixture, or may be used in a stepwise combination. Good.
- a pattern cured film can be obtained by heat-treating the pattern resin film.
- the polyimide precursor of the component (A) may undergo a dehydration ring closure reaction by a heat treatment step to become a corresponding polyimide.
- the temperature of the heat treatment is preferably 250 ° C. or lower, more preferably 120 to 250 ° C., and even more preferably 200 ° C. or lower or 150 to 200 ° C. Within the above range, damage to the substrate and the device can be suppressed to a small extent, the device can be produced with a high yield, and energy saving of the process can be realized.
- the heat treatment time is preferably 5 hours or less, more preferably 30 minutes to 3 hours. Within the above range, the cross-linking reaction or the dehydration ring closure reaction can be sufficiently proceeded.
- the atmosphere of the heat treatment may be the atmosphere or an inert atmosphere such as nitrogen, but a nitrogen atmosphere is preferable from the viewpoint of preventing oxidation of the patterned resin film.
- Examples of the equipment used for the heat treatment include a quartz tube furnace, a hot plate, a rapid thermal annealing, a vertical diffusion furnace, an infrared curing furnace, an electron beam curing furnace, a microwave curing furnace, and the like.
- the cured film of the present invention can be used as a passivation film, a buffer coat film, an interlayer insulating film, a cover coat layer, a surface protective film, or the like.
- a passivation film a buffer coat film
- an interlayer insulating film a cover coat layer
- a surface protective film or the like.
- FIG. 1 is a manufacturing process diagram of a semiconductor device having a multi-layer wiring structure, which is an electronic component according to an embodiment of the present invention.
- a semiconductor substrate 1 such as a Si substrate having a circuit element is covered with a protective film 2 such as a silicon oxide film except for a predetermined portion of the circuit element, and a first conductor layer 3 is formed on the exposed circuit element. It is formed. After that, the interlayer insulating film 4 is formed on the semiconductor substrate 1.
- a photosensitive resin layer 5 such as a rubber chloride type or a phenol novolac type is formed on the interlayer insulating film 4, and the window 6A is provided so that the interlayer insulating film 4 of a predetermined portion is exposed by a known photographic engraving technique. Be done.
- the interlayer insulating film 4 in which the window 6A is exposed is selectively etched to provide the window 6B.
- the photosensitive resin layer 5 is removed using an etching solution that corrodes the photosensitive resin layer 5 without corroding the first conductor layer 3 exposed from the window 6B.
- the second conductor layer 7 is formed and electrically connected to the first conductor layer 3.
- the above steps can be repeated to form each layer.
- the window 6C is opened by pattern exposure to form the surface protective film 8.
- the surface protective film 8 protects the second conductor layer 7 from external stress, ⁇ rays, and the like, and the obtained semiconductor device is excellent in reliability.
- the interlayer insulating film can also be formed by using the photosensitive resin composition of the present invention.
- Synthesis Example 1 (Synthesis of Polymer A1) 7.07 g of 3,3', 4,4'-diphenyl ether tetracarboxylic dianhydride (ODPA), 0.831 g of 2-hydroxyethyl methacrylate (HEMA) and a catalytic amount of 1,4-diazabicyclo [2.2. 2. 2. ] Octane was dissolved in 30 g of N-methyl-2-pyrrolidone (NMP), stirred at 45 ° C. for 1 hour, and then cooled to 25 ° C.
- NMP N-methyl-2-pyrrolidone
- DMAP 2,2'-dimethylbiphenyl-4,4'-diamine
- esterification rate of A1 (reaction rate of the carboxy group of ODPA with HEMA) was calculated by performing NMR measurement under the following conditions. The esterification rate was 80 mol% with respect to all carboxy groups and all carboxy esters (the remaining 20 mol% was carboxy groups).
- the (B') component means a component different from the (B) component referred to in the present invention.
- C1: "Park Mill D” manufactured by NOF CORPORATION, dicumyl peroxide, compound represented by the following formula, 1-hour half-life temperature 135.7 ° C
- Examples 1 to 5 Comparative Examples 1 to 3 [Preparation of photosensitive resin composition]
- a photosensitive resin composition was prepared with the components and blending amounts shown in Table 1.
- the blending amount in Table 1 is the mass part of each component with respect to 100 parts by mass of the component (A).
- a photosensitive resin film was prepared in the same manner as above, and an i-line stepper "FPA-3000iW" (manufactured by Canon Inc.) was used on the obtained photosensitive resin film to apply an i-line of 100 to 600 mJ / cm 2 to 50 mJ. It was irradiated to the exposure in a predetermined pattern at / cm 2 increments dose.
- the exposed resin film was paddle-developed with cyclopentanone using "Act8" for the above development time, and then rinse-washed with propylene glycol monomethyl ether acetate (PGMEA) to obtain a patterned resin film.
- PMEA propylene glycol monomethyl ether acetate
- the above operation was also carried out for each of the photosensitive resin composition after storage at room temperature for 1 week and the photosensitive resin composition after storage at room temperature for 2 weeks to obtain a patterned resin film.
- a pattern resin film (also referred to as “pattern resin film (stored for 0 weeks)" prepared using the photosensitive resin composition immediately after preparation (stored for 0 weeks) and a photosensitive resin composition after storage for 2 weeks at room temperature are used.
- the thickness of the obtained pattern resin film was divided by the thickness of the photosensitive resin film before exposure.
- the residual film ratio (%) was calculated by using the percentage.
- the change in the residual film ratio (the residual film ratio (%) of the pattern resin film (stored for 0 weeks))-(the residual film ratio (%) of the pattern resin film (stored for 2 weeks)) was determined.
- the smaller the change in the residual film ratio the better the storage stability.
- the storage stability was evaluated as ⁇ .
- the storage stability was ⁇ , and when the change in the residual film ratio was 10% or more, the storage stability was x. The results are shown in Table 1.
- the residual film ratio (%) was measured by changing the exposure amount (mJ / cm 2 ). , The exposure amount dependence of the residual film ratio was considered. It was found that the photosensitive resin compositions obtained in Examples 1 to 5 showed extremely small change in the residual film ratio even when the exposure amount was changed, and exhibited high storage stability in a wide range of exposure amounts.
- the photosensitive resin composition of the present invention can be used for an interlayer insulating film, a cover coat layer or a surface protective film, and the interlayer insulating film, a cover coat layer or a surface protective film of the present invention can be used for an electronic component or the like. Can be done.
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Abstract
Description
本発明によれば、以下の感光性樹脂組成物等が提供される。
1.(A)重合性の不飽和結合を有するポリイミド前駆体と、
(B)下記式(11)で表される化合物を含む光重合開始剤と、
(C)熱ラジカル発生剤と、
(D)γ-ブチロラクトンを含む溶剤と
を含む感光性樹脂組成物。
R12は、炭素数1~12のアルキル基、炭素数4~10のシクロアルキル基を含む基、フェニル基を含む基又はトリル基を含む基である。
R13は、置換若しくは無置換の炭素数6~20の芳香族炭化水素基である。)
2.前記式(11)で表される化合物が、下記式(12)で表される化合物である、前記1に記載の感光性樹脂組成物。
3.aが0である、前記2に記載の感光性樹脂組成物。
4.R13が、置換若しくは無置換のフェニル基である、前記1~3のいずれかに記載の感光性樹脂組成物。
5.R12が、炭素数1~12のアルキル基、又は炭素数4~10のシクロアルキル基を含む基である、前記1~4のいずれかに記載の感光性樹脂組成物。
6.前記(C)成分が、分解点が110℃以上200℃以下の化合物を含む、前記1~5のいずれかに記載の感光性樹脂組成物。
7.前記(C)成分が、ビス(1-フェニル-1-メチルエチル)ペルオキシドを含む、前記1~6のいずれかに記載の感光性樹脂組成物。
8.前記(A)成分が、下記式(1)で表される構造単位を有するポリイミド前駆体である、前記1~7のいずれかに記載の感光性樹脂組成物。
9.さらに、官能基を2以上有する多官能の重合性モノマーを含む、1~8のいずれかに記載の感光性樹脂組成物。
10.1~9のいずれかに記載の感光性樹脂組成物を基板上に塗布、乾燥して感光性樹脂膜を形成する工程と、
前記感光性樹脂膜をパターン露光して、樹脂膜を得る工程と、
前記パターン露光後の樹脂膜を、有機溶剤を用いて現像し、パターン樹脂膜を得る工程と、
前記パターン樹脂膜を加熱処理する工程と、
を含むパターン硬化膜の製造方法。
11.前記加熱処理の温度が200℃以下である10に記載のパターン硬化膜の製造方法。
12.1~9のいずれかに記載の感光性樹脂組成物を硬化した硬化膜。
13.パターン硬化膜である12に記載の硬化膜。
14.12又は13に記載の硬化膜を用いて作製された層間絶縁膜、カバーコート層又は表面保護膜。
15.14に記載の層間絶縁膜、カバーコート層又は表面保護膜を含む電子部品。
本発明の感光性樹脂組成物は、(A)重合性の不飽和結合を有するポリイミド前駆体(以下、「(A)成分」ともいう。)、(B)式(11)で表される化合物を含む光重合開始剤(以下、「(B)成分」ともいう。)、(C)熱ラジカル発生剤(以下、「(C)成分」ともいう。)、及び(D)γ-ブチロラクトンを含む溶剤(以下、「(D)成分」ともいう。)を含む。本発明の感光性樹脂組成物は、好ましくはネガ型感光性樹脂組成物である。
R12は、炭素数1~12のアルキル基、炭素数4~10のシクロアルキル基を含む基、フェニル基を含む基又はトリル基を含む基である。
R13は、置換若しくは無置換の炭素数6~20の芳香族炭化水素基である。)
以下、各成分について説明する。
(A)成分は、重合性の不飽和結合を有するポリイミド前駆体であれば特に制限はされないが、パターニング時の光源にi線を用いた場合の透過率が高く、200℃以下の低温硬化時にも高い硬化膜特性を示すポリイミド前駆体が好ましい。
重合性の不飽和結合としては、炭素原子間の二重結合等が挙げられる。
Z3は、-O-が好ましい。
式(1)で表される構造単位以外の構造単位は、1種単独で用いてもよく、2種以上を組み合わせてもよい。
数平均分子量は、ゲルパーミエーションクロマトグラフィー法によって測定し、標準ポリスチレン検量線を用いて換算することによって求める。
光重合開始剤は、式(11)で表される化合物を含む。
R12は、炭素数1~12のアルキル基、炭素数4~10のシクロアルキル基を含む基、フェニル基を含む基又はトリル基を含む基である。
R13は、置換若しくは無置換の炭素数6~20の芳香族炭化水素基である。)
R11の置換若しくは無置換のベンゾイル基、置換若しくは無置換のフルオレニル基、又は置換若しくは無置換のカルバゾリル基を含む基の置換基(以下、任意の置換基ともいう。)としては、フェニルチオ基、エチロールオキシ基、炭素数1~20のアルキル基(例えば、メチル基、エチル基、n-プロピル基)、ハロゲン化(好ましくはフッ素化)されていてもよい炭素数1~20(好ましくは1~10、より好ましくは1~8)のアルコキシ基、2,2-ジメチル-1,3-ジオキソラン-4-イル)メトキシ基、ベンゾイル基、2-(ベンゾイルオキシイミノ(C6H5-C(=O)-N=))オクタノン-1-イル基、2-(ベンゾイルオキシイミノ(C6H5-C(=O)-N=))-3-シクロヘキシルプロパノン-1-イル基等が挙げられる。
任意の置換基は、さらに上述の任意の置換基を有してもよい。
aは、好ましくは0である。
他の光重合開始剤としては、例えば、式(11)又は(12)で表される化合物におけるR13が、置換若しくは無置換の炭素数6~20の芳香族炭化水素基ではない基である化合物が挙げられる。「置換若しくは無置換の炭素数6~20の芳香族炭化水素基ではない基」としては、例えば、炭素数1~12のアルキル基等が挙げられるが、これに限定されない。
また、他の光重合開始剤としては、下記式(15)で表される化合物等が挙げられる。
また、(B)成分及び式(11)で表される化合物以外の他の光重合開始剤の10質量%以上、20質量%以上、30質量%以上、40質量%以上、50質量%以上、60質量%以上、70質量%以上、80質量%以上、90質量%以上、95質量%以上、98質量%以上、99質量%以上又は100質量%が式(11)で表される化合物、又は式(11)で表される化合物及び式(15)で表される化合物であってもよい。
本発明の感光性樹脂組成物は、(C)熱ラジカル発生剤を含有する。
有機過酸化物としては、ジアルキルパーオキシド、ケトンパーオキシド、パーオキシケタール、ハイドロパーオキシド、ジアシルパーオキシド、パーオキシジカーボネート、パーオキシエステル等が挙げられ、ジアルキルパーオキシドが好ましい。
R-O-O-R’
式中、R及びR’は、それぞれ独立に、置換もしくは無置換のアルキル基である。置換基としては炭素数6~10のアリール基等が挙げられる。アルキル基の炭素数は、例えば1~20又は1~10である。
有機過酸化物をベンゼンに溶解させて0.1mol/Lの溶液を調製し、窒素置換を行ったガラス管中に密封する。これを所定温度にセットした恒温槽に浸して熱分解、時間(t)ln a/(a-x)の関係をプロットし、得られた直線の傾きからkを求め、下記式から半減期(t1/2)を求める。
dx/dt=k(a-x)
ln a/(a-x)=kt
x=a/2
kt1/2=ln2
x:分解有機過酸化物量
k:分解速度定数
t:時間
a:有機過酸化物初期濃度
kは下記式で表されるので、数点の温度についてkを測定し、lnk~1/Tの関係をプロットして得られた直線の傾きから活性化エネルギーΔEを求め、y切片から頻度因子Aを求める。
k=Aexp[-ΔE/RT]
lnk=lnA-ΔE/RT
A:頻度因子(1/h)
ΔE:活性化エネルギー(J/mol)
R:気体定数(8.314J/mol・K)
T:絶対温度(K)
lnkの代わりにlnt1/2~1/Tの関係をプロットして得られた直線から任意の温度における有機過酸化物の半減期が得られ、任意の半減期(1時間)を得る分解温度が得られる。
本発明の感光性樹脂組成物は、溶剤としてγ-ブチロラクトンを含む。本発明の感光性樹脂組成物は、γ-ブチロラクトン以外の他の溶剤を含んでもよい。
エステル類として、例えば、酢酸エチル、酢酸-n-ブチル、酢酸イソブチル、ギ酸アミル、酢酸イソアミル、酢酸イソブチル、プロピオン酸ブチル、酪酸イソプロピル、酪酸エチル、酪酸ブチル、乳酸メチル、乳酸エチル、ε-カプロラクトンδ-バレロラクトン、オキシ酢酸アルキル(例えば、オキシ酢酸メチル、オキシ酢酸エチル、オキシ酢酸ブチル(例えば、メトキシ酢酸メチル、メトキシ酢酸エチル、メトキシ酢酸ブチル、エトキシ酢酸メチル、エトキシ酢酸エチル等))、3-オキシプロピオン酸アルキルエステル類(例えば、3-オキシプロピオン酸メチル、3-オキシプロピオン酸エチル等(例えば、3-メトキシプロピオン酸メチル、3-メトキシプロピオン酸エチル、3-エトキシプロピオン酸メチル、3-エトキシプロピオン酸エチル等))、2-オキシプロピオン酸アルキルエステル類(例えば、2-オキシプロピオン酸メチル、2-オキシプロピオン酸エチル、2-オキシプロピオン酸プロピル等(例えば、2-メトキシプロピオン酸メチル、2-メトキシプロピオン酸エチル、2-メトキシプロピオン酸プロピル、2-エトキシプロピオン酸メチル、2-エトキシプロピオン酸エチル))、2-オキシ-2-メチルプロピオン酸メチル及び2-オキシ-2-メチルプロピオン酸エチル(例えば、2-メトキシ-2-メチルプロピオン酸メチル、2-エトキシ-2-メチルプロピオン酸エチル等)、ピルビン酸メチル、ピルビン酸エチル、ピルビン酸プロピル、アセト酢酸メチル、アセト酢酸エチル、2-オキソブタン酸メチル、2-オキソブタン酸エチルなど;エーテル類として、例えば、ジエチレングリコールジメチルエーテル、テトラヒドロフラン、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、メチルセロソルブアセテート、エチルセロソルブアセテート、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、プロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテルアセテート、プロピレングリコールモノプロピルエーテルアセテート等;ケトン類として、例えば、メチルエチルケトン、シクロヘキサノン、シクロペンタノン、2-ヘプタノン、3-ヘプタノン、N-メチル-2-ピロリドン等;芳香族炭化水素類として、例えば、トルエン、キシレン、アニソール、リモネン等;スルホキシド類として、例えばジメチルスルホキシド等;3-ブトキシ-N,N-ジメチルプロパンアミド、3-メトキシ-N,N-ジメチルプロパンアミド、N,N-ジメチルアセトアミド等の有機溶剤が挙げられる。
また、本発明の感光性樹脂組成物で用いる溶剤((D)成分)の10質量%以上、20質量%以上、30質量%以上、40質量%以上、50質量%以上、60質量%以上、70質量%以上、80質量%以上、90質量%以上、95質量%以上、98質量%以上、99質量%以上又は100質量%がγ-ブチロラクトンであってもよい。
感光性樹脂組成物における溶剤((D)成分)の含有量は特に限定されないが、一般的に、(A)成分100質量部に対して50~1000質量部である。
本発明の感光性樹脂組成物は、上記成分以外に、熱塩基発生剤、重合性モノマー、カップリング剤、界面活性剤又はレベリング剤、防錆剤、重合禁止剤、増感剤等を含有してもよい。
重合性モノマーとしては、ジエチレングリコールジ(メタ)アクリレート、トリエチレングリコールジ(メタ)アクリレート、テトラエチレングリコールジ(メタ)アクリレート、トリメチロールプロパンジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、1,4-ブタンジオールジ(メタ)アクリレート、1,6-ヘキサンジオールジ(メタ)アクリレート、ペンタエリスリトールトリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、エトキシ化ペンタエリスリトールテトラ(メタ)アクリレート、スチレン、ジビニルベンゼン、4-ビニルトルエン、4-ビニルピリジン、N-ビニルピロリドン、2-ヒドロキシエチル(メタ)アクリレート、1,3-(メタ)アクリロイルオキシ-2-ヒドロキシプロパン、メチレンビスアクリルアミド、N,N-ジメチルアクリルアミド、N-メチロールアクリルアミド等が挙げられる。
この中でも特に、硬化後の機械特性及び耐薬品性の観点から、官能基(例えば、(メタ)アクリル基)を2以上有する多官能の重合性モノマーであることが好ましい。
カップリング剤は、通常、現像後の加熱処理において、(A)成分と反応して架橋するか、又は加熱処理する工程においてカップリング剤自身が重合する。これにより、得られる硬化膜と基板との接着性をより向上させることができる。
R76-(CH2)q-CO-NH-(CH2)r-Si(OR77)3 (43)
(式(43)中、R76はヒドロキシ基又はグリシジル基であり、q及びrは、それぞれ独立に、1~3の整数であり、R77はメチル基、エチル基又はプロピル基である。)
界面活性剤又はレベリング剤を含むことで、塗布性(例えばストリエーション(膜厚のムラ)の抑制)及び現像性を向上させることができる。
防錆剤を含むことで、銅及び銅合金の腐食の抑制や変色の防止ができる。防錆剤としては、例えば、トリアゾール誘導体及びテトラゾール誘導体等が挙げられる。
防錆剤を用いる場合、防錆剤の含有量は、(A)成分100質量部に対して0.01~10質量部が好ましく、0.1~5質量部がより好ましく、0.5~3質量部がさらに好ましい。
重合禁止剤を含有することで、良好な保存安定性を確保することができる。
重合禁止剤としては、ラジカル重合禁止剤、ラジカル重合抑制剤等が挙げられる。
重合禁止剤としては、例えば、p-メトキシフェノール、ジフェニル-p-ベンゾキノン、ベンゾキノン、ハイドロキノン、ピロガロール、フェノチアジン、レゾルシノール、オルトジニトロベンゼン、パラジニトロベンゼン、メタジニトロベンゼン、フェナントラキノン、N-フェニル-2-ナフチルアミン、クペロン、2,5-トルキノン、タンニン酸、パラベンジルアミノフェノール、ニトロソアミン類等が挙げられる。
増感剤としては、例えば、7-N,N-ジエチルアミノクマリン、7-ジエチルアミノ-3-テノニルクマリン、3,3’-カルボニルビス(7-N,N-ジエチルアミノ)クマリン、3,3’-カルボニルビス(7-N,N-ジメトキシ)クマリン、3-チエニルカルボニル-7-N,N-ジエチルアミノクマリン、3-ベンゾイルクマリン、3-ベンゾイル-7-N,N-メトキシクマリン、3-(4’-メトキシベンゾイル)クマリン、3,3’-カルボニルビス-5,7-(ジメトキシ)クマリン、ベンザルアセトフェノン、4’-N,N-ジメチルアミノベンザルアセトフェノン、4’-アセトアミノベンザル-4-メトキシアセトフェノン、ジメチルアミノベンゾフェノン、ジエチルアミノベンゾフェノン、4,4’-ビス(N-エチル,N-メチル)ベンゾフェノン、4,4’-ビス-(ジエチルアミノ)ベンゾフェノン等が挙げられる
本発明の感光性樹脂組成物の、例えば、80質量%以上、90質量%以上、95質量%以上、98質量%以上、99質量%以上、99.5質量%以上、99.9質量%以上又は100質量%が、
(A)~(D)成分、又は
(A)~(D)成分、並びに、熱塩基発生剤、架橋剤(重合性モノマー)、カップリング剤、界面活性剤又はレベリング剤、防錆剤、重合禁止剤、増感剤からなる群から選択される1以上の成分からなっていてもよい。
本発明の硬化膜は、上述の感光性樹脂組成物を硬化することで得ることができる。本発明の硬化膜は、パターン硬化膜として用いてもよく、パターンがない硬化膜として用いてもよい。本発明の硬化膜の膜厚は、5~20μmが好ましい。
本発明のパターン硬化膜の製造方法では、上述の感光性樹脂組成物を基板上に塗布、乾燥して感光性樹脂膜を形成する工程と、感光性樹脂膜をパターン露光して、樹脂膜を得る工程と、パターン露光後の樹脂膜を、有機溶剤を用いて現像し、パターン樹脂膜を得る工程と、パターン樹脂膜を加熱処理する工程と、を含む。これにより、パターン硬化膜を得ることができる。
乾燥温度は90~150℃が好ましく、90~120℃がより好ましい。
乾燥時間は、30秒間~5分間が好ましい。
乾燥は、2回以上行ってもよい。
これにより、上述の感光性樹脂組成物を膜状に形成した感光性樹脂膜を得ることができる。
照射する活性光線は、i線等の紫外線、可視光線、放射線などが挙げられるが、i線であることが好ましい。
露光装置としては、平行露光機、投影露光機、ステッパ、スキャナ露光機等を用いることができる。
現像液として用いる有機溶剤は、感光性樹脂膜の良溶媒を単独で、又は良溶媒と貧溶媒を適宜混合して用いることができる。
良溶媒としては、N-メチルピロリドン、N-アセチル-2-ピロリドン、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミド、ジメチルスルホキシド、ガンマブチロラクトン、α-アセチル-ガンマブチロラクトン、シクロペンタノン、シクロヘキサノン等が挙げられる。
貧溶媒としては、トルエン、キシレン、メタノール、エタノール、イソプロパノール、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル及び水等が挙げられる。
現像時間は、用いる(A)成分によっても異なるが、10秒間~15分間が好ましく、10秒間~5分間より好ましく、生産性の観点からは、20秒間~5分間がさらに好ましい。
リンス液としては、蒸留水、メタノール、エタノール、イソプロパノール、トルエン、キシレン、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノメチルエーテル等を単独又は適宜混合して用いてもよく、また段階的に組み合わせて用いてもよい。
(A)成分のポリイミド前駆体が、加熱処理工程によって、脱水閉環反応を起こし、対応するポリイミドとなってもよい。
上記範囲内であることにより、基板やデバイスへのダメージを小さく抑えることができ、デバイスを歩留り良く生産することが可能となり、プロセスの省エネルギー化を実現することができる。
加熱処理の雰囲気は大気中であっても、窒素等の不活性雰囲気中であってもよいが、パターン樹脂膜の酸化を防ぐことができる観点から、窒素雰囲気下が好ましい。
本発明の硬化膜は、パッシベーション膜、バッファーコート膜、層間絶縁膜、カバーコート層又は表面保護膜等として用いることができる。
上記パッシベーション膜、バッファーコート膜、層間絶縁膜、カバーコート層及び表面保護膜等からなる群から選択される1以上を用いて、信頼性の高い、半導体装置、多層配線板、各種電子デバイス等の電子部品などを製造することができる。
図1は、本発明の一実施形態に係る電子部品である多層配線構造の半導体装置の製造工程図である。
図1において、回路素子を有するSi基板等の半導体基板1は、回路素子の所定部分を除いてシリコン酸化膜等の保護膜2などで被覆され、露出した回路素子上に第1導体層3が形成される。その後、前記半導体基板1上に層間絶縁膜4が形成される。
次いで、窓6Bから露出した第1導体層3を腐食することなく、感光樹脂層5を腐食するようなエッチング溶液を用いて感光樹脂層5が除去される。
3層以上の多層配線構造を形成する場合には、上述の工程を繰り返して行い、各層を形成することができる。
なお、前記例において、層間絶縁膜を本発明の感光性樹脂組成物を用いて形成することも可能である。
3,3’,4,4’-ジフェニルエーテルテトラカルボン酸二無水物(ODPA)7.07g、メタクリル酸2-ヒドロキシエチル(HEMA)0.831g及び触媒量の1,4-ジアザビシクロ[2.2.2.]オクタンをN-メチル-2-ピロリドン(NMP)30gに溶解し、45℃で1時間撹拌した後、25℃まで冷却した。2,2’-ジメチルビフェニル-4,4’-ジアミン(DMAP)4.12gをNMPに溶解した溶液を加えた後、30℃で4時間撹拌した。その後室温下で一晩撹拌し、反応溶液を得た。
ゲルパーミエーションクロマトグラフ(GPC)法を用いて、標準ポリスチレン換算により、以下の条件で、重量平均分子量を求めた。A1の重量平均分子量は25,575であった。
測定装置:検出器 株式会社日立製作所製L4000UV
ポンプ:株式会社日立製作所製L6000
株式会社島津製作所製C-R4A Chromatopac
測定条件:カラムGelpack GL-S300MDT-5×2本
溶離液:THF/DMF=1/1(容積比)
LiBr(0.03mol/L)、H3PO4(0.06mol/L)
流速:1.0mL/分
検出器:UV270nm
測定機器:ブルカー・バイオスピン社製 AV400M
磁場強度:400MHz
基準物質:テトラメチルシラン(TMS)
溶剤:ジメチルスルホキシド(DMSO)
A1:合成例1で得られたポリマーAI
・「IRUGCURE OXE 01」(I-OXE-01、BASFジャパン株式会社製、商品名、下記式で表される化合物)
・「IRGACURE OXE 02」(I-OXE-02、BASFジャパン株式会社製、商品名、下記式で表される化合物)
D1:γ-ブチロラクトン(GBL)
・「A-DCP」(新中村化学工業株式会社製、トリシクロデカンジメタノールジアクリレート、下記式で表される化合物)
[感光性樹脂組成物の調製]
表1に示す成分及び配合量にて感光性樹脂組成物を調製した。表1の配合量は、100質量部の(A)成分に対する各成分の質量部である。
(パターン樹脂膜の製造)
得られた感光性樹脂組成物(0週間保存)を、塗布装置「Act8」(東京エレクトロン株式会社製)を用いてシリコンウエハ上にスピンコートし、100℃で2分間乾燥後、110℃で2分間乾燥して乾燥膜厚が13μmの感光性樹脂膜を形成した。得られた感光性樹脂膜をシクロペンタノンに浸漬して完全に溶解するまでの時間の2倍を現像時間として設定した。
上記と同様に感光性樹脂膜を作製し、得られた感光性樹脂膜に、i線ステッパ「FPA-3000iW」(キヤノン株式会社製)を用いて、100~600mJ/cm2のi線を50mJ/cm2刻みの照射量で所定のパターンに照射して露光を行った。露光後の樹脂膜を、「Act8」により、シクロペンタノンを用いて上記現像時間でパドル現像した後、プロピレングリコールモノメチルエーテルアセテート(PGMEA)でリンス洗浄を行い、パターン樹脂膜を得た。
以上の操作を、室温で1週間保存後の感光性樹脂組成物と、室温で2週間保存後の感光性樹脂組成物とのそれぞれについても実施し、パターン樹脂膜を得た。
調製直後(0週間保存)の感光性樹脂組成物を用いて作製したパターン樹脂膜(「パターン樹脂膜(0週間保存)」ともいう)と、室温で2週間保存後の感光性樹脂組成物を用いて作製したパターン樹脂膜(「パターン樹脂膜(2週間保存)」ともいう)とのそれぞれについて、得られたパターン樹脂膜の膜厚を露光前の感光性樹脂膜の膜厚で除し、百分率とすることで残膜率(%)を算出した。残膜率変化として、(パターン樹脂膜(0週間保存)の残膜率(%))-(パターン樹脂膜(2週間保存)の残膜率(%))を求めた。残膜率変化は小さいほど、保存安定性に優れることを示す。残膜率変化が5%未満の場合を、保存安定性が〇とした。残膜率変化が5%以上10%未満の場合を、保存安定性が△とし、残膜率変化が10%以上の場合を、保存安定性が×とした。結果を表1に示す。
実施例1~5について、パターン樹脂膜の製造で得られたパターン樹脂膜を、縦型拡散炉μ-TF(光洋サーモシステム株式会社製)を用いて、窒素雰囲気下、175℃で1時間加熱し、硬化物(硬化後膜厚7~10μm)を得た。
実施例1~5について、良好な硬化物が得られた。
この明細書に記載の文献、及び本願のパリ条約による優先権の基礎となる出願の内容を全て援用する。
Claims (15)
- aが0である、請求項2に記載の感光性樹脂組成物。
- R13が、置換若しくは無置換のフェニル基である、請求項1~3のいずれかに記載の感光性樹脂組成物。
- R12が、炭素数1~12のアルキル基、又は炭素数4~10のシクロアルキル基を含む基である、請求項1~4のいずれかに記載の感光性樹脂組成物。
- 前記(C)成分が、分解点が110℃以上200℃以下の化合物を含む、請求項1~5のいずれかに記載の感光性樹脂組成物。
- 前記(C)成分が、ビス(1-フェニル-1-メチルエチル)ペルオキシドを含む、請求項1~6のいずれかに記載の感光性樹脂組成物。
- 前記(A)成分が、下記式(1)で表される構造単位を有するポリイミド前駆体である、請求項1~7のいずれかに記載の感光性樹脂組成物。
(式(1)中、X1は4価の芳香族基である。Y1は2価の芳香族基である。R1及びR2は、それぞれ独立に、水素原子、下記式(2)で表される基又は炭素数1~4の脂肪族炭化水素基であり、R1及びR2の少なくとも一方は下記式(2)で表される基である。-COOR1基と-CONH-基とは、互いにオルト位置にあり、-COOR2基と-CO-基とは、互いにオルト位置にある。)
(式(2)中、R3~R5は、それぞれ独立に、水素原子又は炭素数1~3の脂肪族炭化水素基である。mは1~10の整数である。) - さらに、官能基を2以上有する多官能の重合性モノマーを含む、請求項1~8のいずれかに記載の感光性樹脂組成物。
- 請求項1~9のいずれかに記載の感光性樹脂組成物を基板上に塗布、乾燥して感光性樹脂膜を形成する工程と、
前記感光性樹脂膜をパターン露光して、樹脂膜を得る工程と、
前記パターン露光後の樹脂膜を、有機溶剤を用いて現像し、パターン樹脂膜を得る工程と、
前記パターン樹脂膜を加熱処理する工程と、
を含むパターン硬化膜の製造方法。 - 前記加熱処理の温度が200℃以下である請求項10に記載のパターン硬化膜の製造方法。
- 請求項1~9のいずれかに記載の感光性樹脂組成物を硬化した硬化膜。
- パターン硬化膜である請求項12に記載の硬化膜。
- 請求項12又は13に記載の硬化膜を用いて作製された層間絶縁膜、カバーコート層又は表面保護膜。
- 請求項14に記載の層間絶縁膜、カバーコート層又は表面保護膜を含む電子部品。
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