WO2007010614A1 - 感光性樹脂組成物及び積層体 - Google Patents
感光性樹脂組成物及び積層体 Download PDFInfo
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- WO2007010614A1 WO2007010614A1 PCT/JP2005/013455 JP2005013455W WO2007010614A1 WO 2007010614 A1 WO2007010614 A1 WO 2007010614A1 JP 2005013455 W JP2005013455 W JP 2005013455W WO 2007010614 A1 WO2007010614 A1 WO 2007010614A1
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- photosensitive resin
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- resin composition
- phenyl
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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
-
- 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
- C08F290/061—Polyesters; Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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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
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
Definitions
- the present invention relates to a photosensitive resin composition that can be developed with an alkaline aqueous solution, a photosensitive resin laminate in which the photosensitive resin composition is laminated on a support, and a substrate using the photosensitive resin laminate. And a method of forming a resist pattern on the substrate
- lead frame printed wiring board manufacturing, flexible printed wiring board manufacturing, lead frame for IC chip mounting (hereinafter referred to as lead frame), metal foil manufacturing such as metal mask manufacturing, BGA (ball grid array) And semiconductor packages such as CSP (chip size package), TAB (Tape Automated Bonding), and C ⁇ F (Chip ⁇ n Film: a semiconductor IC mounted on a film-like fine wiring board).
- the present invention relates to a photosensitive resin composition that gives
- a printed wiring board is manufactured by a photolithography method.
- the photolithographic method is a method in which a photosensitive resin composition is applied onto a substrate, pattern exposure is performed to polymerize and cure an exposed portion of the photosensitive resin composition, and an unexposed portion is removed with a developer.
- This is a method of forming a conductor pattern on a substrate by forming a resist pattern on the substrate, forming a conductor pattern by etching or clinging, and then removing the resist pattern from the substrate.
- the photoresist solution is applied to the substrate and dried, or the support is composed of a photosensitive resin composition.
- dry film resist a photosensitive resin laminate
- photosensitive resin layer a layer
- protective layer a protective layer
- the dry film resist has a protective layer such as a polyethylene film
- a protective layer such as a polyethylene film
- the photosensitive resin layer and the support are laminated on a substrate such as a copper-clad laminate using a laminator so that the substrate, the photosensitive resin layer, and the support are in this order.
- the exposed portion is polymerized and cured by exposing the photosensitive resin layer with ultraviolet rays such as i rays (365 nm) emitted from an ultrahigh pressure mercury lamp through a photomask having a wiring pattern.
- the support made of polyethylene terephthalate or the like is peeled off.
- an unexposed portion of the photosensitive resin layer is dissolved or dispersed and removed by a developing solution such as an aqueous solution having weak alkalinity to form a resist pattern on the substrate.
- a developing solution such as an aqueous solution having weak alkalinity
- a known etching process or pattern plating process is performed using the formed resist pattern as a protective mask.
- the resist pattern is peeled from the substrate to produce a substrate having a conductor pattern, that is, a printed wiring board.
- thixanthone and its derivatives which are other photopolymerization initiators, are prepared with appropriate sensitizers.
- sensitizers By selecting, it is possible to make a combination that shows high sensitivity to an exposure light source having a wavelength of around 380 nm. However, even if this combination is used, sufficient resolution cannot be obtained in the formed resist pattern, and the sensitivity is also lowered for an exposure light source having a wavelength of 400 nm or more.
- Patent Document 1 JP-A-4-223470
- 3-ary loop pyrazoline or 1-aryl 1-aralkyne loop pyrazoline is described, and examples of producing dry film resists are also described.
- the inventor of the present invention is a compound specifically described in Patent Document 1, 1,5_diphenyl-2-rutile 3-styryl monopyrazoline, and 1 _phenolino 3_ (4-methyl
- Patent Document 1 1,5_diphenyl-2-rutile 3-styryl monopyrazoline
- 1 _phenolino 3_ 4-methyl
- the compound remained as an undissolved substance in the photosensitive resin layer, and the dry film It could not be used as a resister. Details will be shown in a comparative example described later.
- Patent Document 2 Japanese Patent No. 2931693 also discloses a bisazoline compound in which a specific substituent is introduced into 1,5-diphenyl-3-styrylpyrazoline.
- a light shielding agent comprising a product is disclosed, and an example in which the pyrazoline compound is added to a photoresist solution and applied to a substrate is also described.
- the light shielding agent referred to in Patent Document 2 is an additive used to prevent a decrease in resolution due to exposure of even a portion that should be an unexposed portion due to reflected light from the substrate during exposure.
- the virazoline compound is used as a sensitizer for a photopolymerization initiator of a dry film resist.
- Patent Document 1 Japanese Patent Laid-Open No. 223470
- Patent Document 2 Japanese Patent No. 2931693
- the present invention is an aqueous solution having good strength, good compatibility when producing a dry film, excellent sensitivity, resolution, and adhesion to an exposure light source having a wavelength of 350 to 410 nm, and good storage stability.
- a photosensitive resin composition that can be developed by the method, a photosensitive resin laminate using the photosensitive resin composition, a method of forming a resist pattern on a substrate using the photosensitive resin laminate, and the resist pattern It aims at providing the use of.
- A, B and C each independently comprise an aryl group, a heterocyclic group, a linear or branched alkyl group having 3 or more carbon atoms, and NR (R is a hydrogen atom or an alkyl group).
- B and C are each independently a linear or branched alkyl group having 3 or more carbon atoms, or NR (R is a hydrogen atom or an alkyl group), A is an aryl group, A heterocyclic group,
- a 0 or 1
- the pyrazoline compound (d) is substituted with 1 phenyl 3- (4 tert butyl styryl) 5-(4 tert-butyl monophenyl) mono virazoline, or 1- (4- (benzoxazole 2
- Photosensitive resin composition according to (1) characterized in that it is composed of (l) phenyl) -3- (4-tert-butylstyryl) 5- (4-tert-butynole-phenyl) mono-virazoline, or a mixture of both. .
- the addition-polymerizable monomer (b) contains a compound represented by the following general formula ( ⁇ ), a compound represented by the following general formula ( ⁇ ⁇ ⁇ ), or a mixture thereof.
- the photosensitive resin composition according to any one of (1) to (3).
- R and R are H or CH, and these may be the same or different.
- D and E are alkylene groups having 2 to 4 carbon atoms, and when they are the same or different, _ (D-0) _ and-(EO)-
- the repeating unit may be a block structure or a random structure.
- m l, m 2, nl, and n2 is 0 or a positive integer, their sum is 2 to 30. )
- R and R are H or CH, and these may be the same or different.
- F and G are alkylene groups having 2 to 4 carbon atoms, and when they are the same or different from each other,-(FO)-and-(GO)-are repeated.
- the unit may be a block structure or a random structure. pl, p2, ql, and q2 are 0 or a positive integer, and their sum is 2-30. )
- a photosensitive resin laminate obtained by laminating the photosensitive resin composition according to any one of (1) to (4) on a support.
- a resist pattern forming method comprising a lamination step, an exposure step, and a development step of forming a photosensitive resin layer on the substrate using the photosensitive resin laminate according to (5).
- a method for producing a printed wiring board comprising a step of etching or attaching a substrate on which a resist pattern is formed by the method according to (6) or (7).
- a lead frame manufacturing method including a step of etching a substrate on which a resist pattern is formed by the method according to (6) or (7).
- a method for manufacturing a semiconductor package comprising a step of etching or attaching a substrate on which a resist pattern is formed by the method according to (6) or (7).
- a method for producing a substrate having a concavo-convex pattern comprising a step of processing a substrate on which a resist pattern is formed by the method according to (6) or (7) by sand blasting.
- the photosensitive resin composition of the present invention has good compatibility when preparing a dry film resist, and has high sensitivity to an exposure light source having a wavelength of 350 to 410 nm.
- the photosensitive resin laminate of the present invention is excellent in sensitivity during exposure, resolution of the resist pattern after development, and adhesion, and has good storage stability.
- the resist pattern forming method of the present invention provides a resist pattern excellent in sensitivity, resolution, and adhesion, and is suitable for manufacturing a printed wiring board, a lead frame, a semiconductor package, and a flat display. Can be used.
- the photosensitive resin composition of the present invention comprises a thermoplastic copolymer having ( a ) «, j3-unsaturated carboxyl group-containing monomer as a copolymerization component and having an acid equivalent of 100 to 600 and a weight average molecular weight of 5000 to 500,000.
- polymer 20 to 90 wt%
- Agent 0.01 to 30% by mass
- pyrazoline compound represented by the following general formula (I) 0.001 to 10% by mass, as an essential component.
- A, B and C are each independently an aryl group, a heterocyclic group, a linear or branched alkyl group having 3 or more carbon atoms, NR (R is a hydrogen atom or an alkyl group) From the group of
- Each of a, b and c is an integer between 0 and 2, and the value of force a + b + c is 1 or greater.
- thermoplastic copolymer includes a / 3-unsaturated carboxyl group-containing monomer as a copolymerization component, and has an acid equivalent of 100 to 600, The one having a weight average molecular weight of 5,000 to 500,000 is used.
- the carboxyl group in the thermoplastic copolymer is necessary for the photosensitive resin composition to have developability and releasability with respect to a developer and a release solution made of an alkaline aqueous solution.
- the acid equivalent is preferably 100 to 600 force S, more preferably 300 to 450. In solvent or composition It is 100 or more from the viewpoint of ensuring compatibility with other components, particularly (b) addition polymerizable monomer described later, and 600 or less from the viewpoint of maintaining developability and peelability.
- the acid equivalent refers to the mass (gram) of the thermoplastic copolymer having one equivalent of a carboxynole group therein. The acid equivalent is measured by potentiometric titration using a Hiranuma Reporting Titrator (COM-555) and 0.1 mol mol of NaOH aqueous solution.
- the weight average molecular weight is 5000 force, etc. From the viewpoint of maintaining a uniform thickness of the dry film resist and obtaining resistance to the developer, it is 5000 or more from the viewpoint of maintaining developability. More preferably, the weight average molecular weight is 20000 forces to 100000.
- the weight average molecular weight in this case is a weight average molecular weight measured by gel permeation chromatography (GPC) using a polystyrene calibration curve. The weight average molecular weight can be measured under the following conditions using gel permeation chromatography manufactured by JASCO Corporation. Differential refractometer: RI— 1530
- thermoplastic copolymer is a force that is a copolymer comprising at least one of the first monomers described later, at least one of the first monomers and the second monomer described later. It is preferable that the copolymer is composed of at least one kind.
- the first monomer is a monomer containing a ⁇ -unsaturated carboxyl group in the molecule.
- (meth) acrylic acid, fumaric acid, cinnamic acid, crotonic acid, itaconic acid, maleic anhydride, and maleic acid half ester can be mentioned.
- (meth) acrylic acid is particularly preferable.
- the second monomer is a non-acidic monomer having at least one polymerizable unsaturated group in the molecule.
- Esters of butyl alcohol such as acrylate, benzyl (meth) acrylate, butyl acetate, (meth) acrylonitrile, styrene, and polymerizable styrene derivatives.
- acrylate, benzyl (meth) acrylate, butyl acetate, (meth) acrylonitrile, styrene, and polymerizable styrene derivatives are particularly preferable.
- the amount of the thermoplastic polymer contained in the photosensitive resin composition of the present invention is in the range of 20 to 90% by mass, and preferably in the range of 25 to 70% by mass. This amount is 20% by mass or more from the viewpoint of maintaining alkali developability, and is 90% by mass or less from the viewpoint that the resist pattern formed by exposure sufficiently exhibits the performance as a resist.
- the ( b ) addition polymerizable monomer used in the photosensitive resin composition of the present invention preferably contains a compound represented by the following general formula ( ⁇ ⁇ ) from the viewpoint of resolution and adhesion.
- R and R are H or CH, and these may be the same or different.
- D and E are alkylene groups having 2 to 4 carbon atoms, and are the same or different, and-(D-0)-and-(EO)-
- the repeating unit may be a block structure or a random structure.
- m l, m 2, nl, and n2 is 0 or a positive integer, their sum is 2 to 30.
- Examples of the compound represented by the general formula ( ⁇ ) include 2, 2_bis ⁇ (4-ataryloxypolyethoxy) phenyl ⁇ propane or 2,2bis ⁇ (4 methacryloxypolyethoxy) phenol. Le ⁇ propane.
- the polyethoxy group possessed by the compound includes monoethoxy group, diethoxy group, triethoxy group, tetraethoxy group, pentaethoxy group, hexaethoxy group, heptaethoxy group, otaethoxy group, nonaethoxy group, decaethoxy group, undeoxy ethoxy group, dodeca
- a compound that is any group selected from the group consisting of an ethoxy group, a tridecaethoxy group, a tetradecaethoxy group, and a pentadecaethoxy group is preferable.
- 2,2-bis ⁇ (4-aryloxypolyalkyleneoxy) phenyl ⁇ propane or 2,2-bis ⁇ (4-methacryloxypolyalkyleneoxy) phenyl ⁇ propane can be mentioned.
- the polyalkyleneoxy group of the compound include a mixture of an ethoxy group and a propyloxy group, an adduct having a block structure of an otataethoxy group and a dipropyloxy group or an adduct having a random structure, and a tetraethoxy group.
- An adduct having a block structure or a random structure having a tetrapropyloxy group is preferred.
- 2,2-bis ⁇ (4 methacryloxypentaethoxy) phenyl ⁇ propane is most preferred.
- the photosensitive resin composition of the present invention from the viewpoint of resolution, it is desirable to contain a compound represented by the following general formula (III) as (b) an addition polymerizable monomer.
- R and R are H or CH, and these may be the same or different.
- F and G are alkylene groups having 2 to 4 carbon atoms, and when they are the same or different, _ (F-0) _ and _ (G_0) _
- the repeating unit may be a block structure or a random structure. pl, p2, ql, and q2 are 0 or a positive integer, and their sum is 2-30. )
- Examples of the compound represented by the above general formula (III) include 2,2-bis ⁇ (4-ataryloxypolyethoxy) cyclohexyl ⁇ propane or 2,2-bis ⁇ (4-methacryloxypolyethoxy). ) Cyclohexyl ⁇ propane.
- the polyethoxy group possessed by the compound includes monoethoxy group, ethoxy group, triethoxy group, tetraethoxy group, pentaethoxy group, hexaethoxy group, heptaethoxy group, otataethoxy group, nonaethoxy group, decaethoxy group, undecaethoxy group, dodecaethoxy group.
- a compound that is any group selected from the group consisting of a group, a tridecaethoxy group, a tetradecaethoxy group, and a pentadecaethoxy group is preferred.
- Examples of the polyalkyleneoxy group possessed by the compound include a mixture of an ethoxy group and a propoxyloxy group, an adduct of a block structure or an adduct of a random structure of an otataethoxy group and a dibupyroxy group, and a tetraethoxy group. And tetrapropyl An adduct of a block structure or a random structure of an oxy group is preferred. Among these, 2,2-bis ⁇ (4-methacryloxypentaethoxy) cyclohexyl ⁇ propane is most preferable.
- the amount is 5 to 40% by mass in the photosensitive resin composition. Is more preferably 10 to 30% by mass. This amount is 5% by mass or more from the viewpoint of realizing high resolution and high adhesion, and the viewpoint power is also 40% by mass or less if the cold flow and the delay in the peeling of the cured resist are suppressed. .
- the amount of the (b) addition polymerizable monomer contained in the photosensitive resin composition of the present invention is in the range of 5 to 75 mass%, more preferably 15 to 70 mass%. This amount is 5% by mass or more from the viewpoint of suppressing poor curing and a delay in development time, and is 75% by mass or less from the viewpoint of suppressing the corona red flow and the peeling delay of the cured resist.
- the photosensitive resin composition of the present invention contains (c) a photopolymerization initiator and contains hexarylbisimidazole (hereinafter also referred to as triarylimidazolyl dimer) as an essential component.
- the amount of the (c) photopolymerization initiator contained in the photosensitive resin composition of the present invention is in the range of 0.01 to 30% by mass, and more preferably in the range of 0.05 to 10% by mass. . From the viewpoint of obtaining sufficient sensitivity, 0.01% by mass or more is preferable. Also, if sufficient light is transmitted to the bottom surface of the resist to obtain good high resolution and adhesion, from the viewpoint of achieving high sensitivity. Less than mass% is preferred.
- Examples of the above-mentioned triarylimidazolyl dimer include 2— (o black mouth phenyl) 4, 5 — diphenyl imidazolyl dimer (hereinafter referred to as 2, 2 ′ bis (2 black mouth phenyl).
- the amount of the hexa ⁇ reel bisimidazole contained in the photosensitive resin composition of the present invention 0.01 to 30 the mass 0/0, preferably ⁇ or, 0. 05 ⁇ : 10 mass 0 / 0 , and most preferably ⁇ , 0 ⁇ 1 to 5% by mass. This amount is required to be 0.01% by mass or more from the viewpoint of obtaining sufficient sensitivity, and is 30% by mass or less from the viewpoint of maintaining high resolution.
- a photopolymerization initiator other than hexaarylbisimidazole may be used in combination with the photosensitive resin composition of the present invention.
- photopolymerization initiators include 2-ethyl anthraquinone, otaethyl anthraquinone, 1,2_benzanthraquinone, 2,3_benzanthraquinone, 2_phenylanthraquinone, 2,3-diphenyl Luanthraquinone, 1_black anthraquinone, 1,4_naphthoquinone, 9,10-phenanthraquinone, 2-methanolone 1,4_naphthoquinone, 2,3_dimethylanthraquinone, and 3_black mouth 2_ Quinones such as methyl anthraquinone, benzophenone, Michler's ketone [4,4'-bis (dimethylamino) benzophen
- Examples of the combination of the above thixanthones and alkylaminobenzoic acid include, for example, a combination of ethylthioxanthone and dimethylaminobenzoate, a combination of 2_chlorothioxanthone and dimethylaminobenzoate, and isopropylthioxanthone and Combination with dimethylaminobenzoate ethyl.
- Preferred examples of the photopolymerization initiator added to the photosensitive resin composition of the present invention in addition to hexaryl bisimidazole include thixanthones such as jetylthioxanthone and chlorothioxanthone, dimethylaminobenzoic acid, and the like.
- thixanthones such as jetylthioxanthone and chlorothioxanthone, dimethylaminobenzoic acid, and the like.
- dialkylaminobenzoates such as ethyl, benzophenone, Michler's ketone, 4,4 ′ bis (jetylamino) benzophenone, 9 phenylacridine, N phenylglycine, and combinations thereof. Of these, Michler's ketone or 4,4'-bis (jetylamino) benzophenone is particularly preferred.
- a pyrazoline compound represented by the following general formula (I) is an essential component.
- A, B and C each independently comprise an aryl group, a heterocyclic group, a linear or branched alkyl group having 3 or more carbon atoms, and NR (R is a hydrogen atom or an alkyl group).
- Examples of the pyrazoline compound represented by the above general formula (I) include 1 (4 tert butyl-phenyl) 3 -styryl 1 -phenyl 1 pyrazoline, 1 -phenol 1-(4- tert -butyl- Stylyl) 1-5- (4-tert-butyl monophenyl) 1-pyrazoline, 1, 5-bis 1- (4-tert-butyl-phenyl) -3- (4 tert-butyl styryl) pyrazoline, 1- (4-tert- Octyl monophenyl) 3-styryl 1 5-phenyl monopyrazoline, 1-phenyl 1 3- (4-tert butyl monostyryl) -5- (4-ethoxy monophenyl) 1 pyrazoline, 1_phenyl 1 3_ (4_ tert —Octyl tostyryl) 1 5_ (4— tert-octyl styryl) 1 pyrazoline, 1,5 bis (4
- pyrazoline compounds represented by the above general formula (I) among them, pyrazoline compounds having a tert-butyl group in both B or C and B and C are more preferred. Particularly preferred is phenyl-3- (4-tert-butylstyryl) 5- (4 tert-butylphenyl) -pyrazoline.
- pyrazoline compounds having a benzoxazole group are preferred for an exposure light source having a wavelength of 400 nm or more which is preferably used in maskless exposure.
- (P) 3- (4 tert butyl butyl styryl) -5- (4- tert butyl butyl phen) 1 virazoline is preferred.
- the total amount of the compound represented by the general formula (I) as long as it is contained in the photosensitive resin composition of the present invention is 0.001 to 10% by mass, A more preferable range is 0.05 to 5% by mass, and a most preferable range is 0.05 to 2% by mass.
- This amount is 0.001% by mass or more from the viewpoint of improving sensitivity and resolution, and is compatible with an addition polymerizable monomer having a thermoplastic polymer and a terminal ethylenically unsaturated group. From the viewpoint of improving the dispersibility and exerting the effect as a dry film photoresist, it is 10% by mass or less.
- pyrazoline compounds in addition to the pyrazoline compound represented by the general formula (I), other pyrazoline compounds may be used in combination.
- examples of such compounds are, for example, 1-phenylene 3_ (4_tert_butyl monostyryl) _ 5 _ (4-carboxy monophenyl) monopyrazoline, 1-phenylene 2- 3- (4-tert —Butyl Istyl 1) 5- (4-Mercapto-phenyl) 1 virazoline, 1-Phenol 1 3- (4-tert-butyl styryl)-5-(4-Hydroxy 1-Phenyl) 1 virazoline, 1-Phenol 1- (4-tert-butylstyryl) -5- (4-ethylthiophenyl) pyrazoline, and 1-phenyl-3_ (4_tert_butylmonostyryl) -5- (4-ethoxycarbonylroofenyl) 1 virazoline can
- the pyrazoline compound is used as a sensitizer by being used in combination with the photopolymerization initiator containing (c) hexarylbisimidazole described above. Demonstrate.
- coloring substances such as dyes and pigments can be employed in addition to the components described above.
- coloring substances include phthalocyanine green, crystal violet, methyl orange, Nile Blue 2B, Victoria Bull 1, Malachite Green, Basic Blue 20, and Diamond Green.
- a color former may be added to the photosensitive resin composition of the present invention so that a visible image can be given by exposure.
- a coloring dye include a leuco dye or a combination of a fluorane dye and a halogen compound.
- the halogen compounds include amyl bromide, isoamyl bromide, isoptyrene bromide, bromoethylene, diphenylmethylol bromide, benzal bromide, methylene bromide, tribromomethyl phenyl sulfone, carbon tetrabromide, toluene.
- the amount of the coloring substance and the color former is preferably 0.01 to 10% by mass in the photosensitive resin composition. It is preferably 0.01% by mass or more from the viewpoint of recognizing sufficient colorability (color development), 10% by mass or less from the viewpoint of maintaining the contrast between the exposed part and the unexposed part and maintaining storage stability.
- a radical polymerization inhibitor such as benzotriazoles, and carboxy are added to the photosensitive resin composition. It is preferable to include at least one compound selected from the group consisting of benzotriazoles.
- radical polymerization inhibitors examples include p-methoxyphenol, hydride quinone, pyrogallol, naphthylamine, tert-butylcatechol, cuprous chloride, 2,6-di_se6_butyl__cresol, 2,2,1-methylenebis (4-methyl-6_tert-butenophenol), 2,2'-methylenebis (4-ethyl-6_tert_butylphenol), ditrosophenylhydroxyamine aluminum salt, and diphenylnitrosoa Min etc. are mentioned.
- Examples of the benzotriazoles include 1, 2, 3_benzotriazole, 1_chloro 1, 1, 2, 3_benzotriazole, and bis (N-2-ethylhexyl) aminomethylene. 1,2,3-benzotriazole, bis (N-2-ethylhexyl) aminomethylene-1,2,2,3-tolyltriazole, and bis (N-2-hydroxyethyl) aminomethylene-1,2, 3_Benzotriazole.
- carboxybenzotriazoles examples include 4 carboxy-1,2,3-benzotriazole, 5 carboxy-1,2,3 benzotriazole, N— (N, N di-2-ethylhexyl) aminomethylene. Examples thereof include carboxybenzotriazole, N— (N, N di-2-hydroxyethyl) aminomethylenecarboxybenzotriazole, and N— (N, N di-2-ethylhexyl) aminoethylenecarboxybenzotriazole.
- the total addition amount of the radical polymerization inhibitor, benzotriazoles, and carboxybenzotriazoles is preferably 0.01 to 3% by mass, more preferably 0.05 to:! This amount is preferably 0.01% by mass or more from the viewpoint of imparting storage stability to the photosensitive resin composition, and more preferably 3% by mass or less from the viewpoint of maintaining sensitivity.
- the photosensitive resin composition of the present invention may contain an additive such as a plasticizer, if necessary.
- additives include polyethylene glycol, polypropylene glycol, polyoxypropylene polyoxyethylene ether, polyoxyethylene monomethyl ether, polyoxypropylene monomethyl ether, polyoxyethylene polyol.
- Glycolol esters such as xylpropylene monomethyl ether, polyoxyethylene monoethyl ether, polyoxypropylene monoethyl ether, polyoxyethylene polyoxypropylene monoethyl ether, phthalates such as jetyl phthalate, o _toluene
- examples thereof include sulfonic acid amide, p-toluenesulfonic acid amide, tributynolic citrate, triethyl taenoate, triethyl acetyl citrate, tri_n_propyl acetyl quinate and tri-n_butyl acetyl citrate.
- the amount of an additive such as a plasticizer is preferably 5 to 50% by mass, more preferably 5 to 50% by mass in the photosensitive resin composition. 5% by mass or more is preferable from the viewpoint of suppressing delay in development time or imparting flexibility to the cured film, and 50% by mass or less is preferable from the viewpoint of suppressing cold flow if curing is insufficient.
- the photosensitive resin composition of the present invention can be used as a photosensitive resin composition preparation liquid to which a solvent is added.
- Suitable solvents include ketones typified by methyl ethyl ketone (MEK), and alcohols such as methanol, ethanol, and isopropyl alcohol. It is preferable to add a solvent to the photosensitive resin composition so that the viscosity of the photosensitive resin composition preparation liquid is 500 to 4000 mPa'sec at 25 ° C.
- the photosensitive resin laminate of the present invention comprises a photosensitive resin layer and a support that supports the layer. If necessary, the photosensitive resin laminate may have a protective layer on the surface opposite to the support of the photosensitive resin layer. Les.
- the support used here is preferably a transparent one that transmits light emitted from the exposure light source.
- a support include polyethylene terephthalate film, polyvinyl alcohol film, poly (vinyl chloride) film, poly (vinyl chloride) copolymer film, poly (vinylidene chloride) film, poly (vinylidene chloride) copolymer film, poly (methyl methacrylate) copolymer film, Examples thereof include polystyrene film, polyacrylonitrile film, styrene copolymer film, polyamide phenol, and cellulose derivative film. These films can be stretched if necessary.
- the haze is preferably 5 or less. The thinner the film, the more advantageous in terms of image formation and economy. However, those having a strength of 10 to 30 ⁇ are preferably used in order to maintain the strength.
- an important characteristic of the protective layer used in the photosensitive resin laminate is that the protective layer is sufficiently smaller than the support in terms of adhesion to the photosensitive resin layer and can be easily peeled off.
- a polyethylene film and a polypropylene film can be preferably used as the protective layer.
- a film having excellent peelability disclosed in JP-A-59-202457 can be used.
- the thickness of the protective layer is preferably 10 to 100 zm, more preferably 10 to 50 111.
- the thickness of the photosensitive resin layer in the photosensitive resin laminate of the present invention is preferably 5 to 100 zm, more preferably 7 to 60 zm. As the thickness is thinner, the resolution is improved, and as the thickness is thicker, the film strength is improved.
- a conventionally known method can be adopted as a method for preparing the photosensitive resin laminate of the present invention by sequentially laminating the support, the photosensitive resin layer, and if necessary, the protective layer.
- the photosensitive resin composition used for the photosensitive resin layer is made into the above-mentioned photosensitive resin composition mixed solution, first coated on a support using a bar coater or a roll coater, dried and supported.
- a photosensitive resin layer made of the photosensitive resin composition is laminated on the body.
- a photosensitive resin laminate can be prepared by laminating a protective layer on the photosensitive resin layer.
- a resist pattern using the photosensitive resin laminate of the present invention can be formed by a process including a laminating process, an exposure process, and a developing process. An example of a specific method is shown.
- a laminating process is performed using a laminator.
- the photosensitive resin laminate has a protective layer
- the protective layer is peeled off, and then the photosensitive resin layer is heated and pressure-bonded to the substrate surface with a laminator and laminated.
- the photosensitive resin layer may be laminated on only one surface of the substrate surface, or may be laminated on both surfaces as necessary.
- the heating temperature at this time is generally 40 to 160 ° C.
- substrate of the obtained resist pattern improves by performing this thermocompression bonding twice or more.
- a two-stage laminator equipped with two rolls may be used for crimping, or it may be repeatedly crimped through the roll several times. Les.
- an exposure process is performed using an exposure machine. If necessary, the support is peeled off and exposed to active light through a photomask. The exposure amount is determined from the light source illuminance and the exposure time. You may measure using a photometer.
- a maskless exposure method may be used.
- exposure is performed directly on the substrate by a drawing apparatus without using a photomask.
- a semiconductor laser having a wavelength of 350 to 410 nm, an ultrahigh pressure mercury lamp, or the like is used.
- the drawing pattern is controlled by a computer, and the exposure amount in this case is determined by the illuminance of the exposure light source and the moving speed of the substrate.
- a developing process is performed using a developing device. If there is a support on the photosensitive resin layer after exposure, this is excluded. Subsequently, an unexposed portion is removed by using a developer composed of an alkaline aqueous solution to obtain a resist image. Na CO or K CO etc. as alkaline aqueous solution
- An aqueous solution of 2 3 2 3 is preferred. These are generally Na 2 CO aqueous solutions having a concentration of 0.2 to 2% by mass selected according to the characteristics of the photosensitive resin layer.
- Na 2 CO aqueous solutions having a concentration of 0.2 to 2% by mass selected according to the characteristics of the photosensitive resin layer.
- the temperature of the developer in the development step is preferably maintained at a constant temperature in the range of 20 to 40 ° C.
- the method for producing a printed wiring board of the present invention is performed by performing the following steps after forming a resist pattern on a copper-clad laminate or a flexible substrate as a substrate by the above-described resist pattern forming method.
- a step of forming a conductor pattern on the copper surface of the substrate exposed by development using a known method such as an etching method or a staking method is performed.
- the alkaline aqueous solution for stripping (hereinafter also referred to as “stripping solution”) is not particularly limited, but an aqueous solution of NaOH or KOH having a concentration of 2 to 5% by mass is generally used. It is possible to cover a small amount of a water-soluble solvent in the stripping solution.
- the temperature of the stripping solution in the stripping step is 40 to 70. Les, preferably in the C range.
- the lead frame manufacturing method of the present invention is performed by performing the following steps after forming a resist pattern on a metal plate such as copper, copper alloy, or iron-based alloy as a substrate by the above-described resist pattern forming method.
- a step of etching the substrate exposed by development to form a conductor pattern is performed. Thereafter, a desired lead frame is obtained by performing a peeling process in which the resist pattern is peeled by the same method as the above-described printed wiring board manufacturing method.
- the semiconductor package manufacturing method of the present invention is performed by performing the following steps after forming a resist pattern on the wafer on which a circuit as an LSI has been formed as a substrate by the above-described resist pattern forming method.
- a step of forming a conductor pattern by performing columnar plating such as copper or solder on the opening exposed by development is performed. After that, by performing a peeling process for peeling the resist pattern by the same method as the above-described printed wiring board manufacturing method, and further by performing a process of removing the thin metal layer other than the columnar tack by etching, A desired semiconductor package is obtained.
- the resist pattern can be used as a protective mask member when the substrate is processed by the sandblasting method by the resist pattern forming method described above.
- the substrate examples include glass, silicon wafer, amorphous silicon, polycrystalline silicon, ceramic, sapphire, and metal material.
- a resist pattern is formed on the substrate such as glass by the same method as the resist pattern forming method described above. After that, a blast material is sprayed onto the formed resist pattern and cut to the desired depth. Through a dplast treatment process and a peeling process in which the resist pattern portion remaining on the substrate is removed from the substrate with an alkaline stripping solution or the like, the substrate can be made into a substrate having a fine uneven pattern on the substrate.
- the known blasting material used for the sandblasting process is 2-10, such as SiC, SiO 2, A1 0, CaC 0, Zr 0, glass, stainless steel, etc.
- Fine particles of about 0 ⁇ m are used.
- the above-described method for manufacturing a substrate having a concavo-convex pattern by the sandblasting method is used for manufacturing a partition for a flat panel display, processing an organic EL glass cap, drilling a silicon wafer, and pinning a ceramic. can do. Further, it can be used for the production of a strong dielectric film and an electrode of a metal material layer selected from the group consisting of noble metals, noble metal alloys, refractory metals, and refractory metal compounds.
- the photosensitive resin laminates in Examples and Comparative Examples were produced as follows.
- a photosensitive resin composition and a solvent having the composition shown in Table 1 are thoroughly stirred and mixed to prepare a photosensitive resin composition preparation solution, and a bar coater is used on the surface of a 16 ⁇ m-thick polyethylene terephthalate film as a support. It was applied evenly and dried in a 95 ° C dryer for 3 minutes to form a photosensitive resin layer. The thickness of the photosensitive resin layer was 25 ⁇ m.
- a polyethylene terephthalate film of a photosensitive resin layer was laminated, and a polyethylene film having a thickness of 23 ⁇ m was laminated as a protective layer on the surface of the resin layer to obtain a photosensitive resin laminate.
- Table 2 shows the names of the material components in the photosensitive resin composition preparations indicated by abbreviations in Table 1.
- the substrate for sensitivity and resolution evaluation is a 1.6 mm thick copper clad laminate on which 35 / m rolled copper foil is laminated, and the surface is wet pafrol polished (manufactured by 3EM Co., Ltd., Scotch Bright (registered trademark) HD) # 600, twice).
- Roll temperature 105 with hot roll laminator (Asahi Kasei Electronics Co., Ltd., AL-70) on copper-clad laminate pre-heated to 60 ° C while being peeled off while peeling polyethylene film of photosensitive resin laminate. Laminated with C. The air pressure was 0.35 MPa, and the laminating speed was 1.5 m / min.
- Exposure amount that the number of step tablet steps is 8 by the following sensitivity evaluation by direct drawing type exposure equipment (Hitachi Via Mechanitas Co., Ltd., DI exposure machine DE_ 1AH, light source: GaN blue-violet diode, main wavelength 407 ⁇ 3 nm) And exposed.
- the minimum development time was defined as the minimum time required for the photosensitive resin layer in the unexposed portion to be completely dissolved.
- Sensitivity and resolution evaluation board that has passed 15 minutes after lamination the transparency is also black in 21 levels.
- the exposure was carried out using a 21-step tablet made by Stofer with varying degrees. After exposure, the film was developed with a development time twice as long as the minimum development time, and was ranked according to the exposure amount where the number of step tablet stages where the resist film remained completely was 8, as follows.
- the exposure amount is 100 mj / cm 2 or less.
- the exposure amount exceeds 100 mj / cm 2 and is 150 mjZcm 2 or less.
- ⁇ exposure amount is more than 150mj / cm 2, 200mj / cm 2 or less.
- the exposure amount exceeds 200 mj / cm 2 .
- the resolution value is 20/1 111 or less.
- Resolution value exceeds 20/1 111, 30 ⁇ ⁇ or less.
- Adhesion value is 20/1 111 or less.
- Adhesion value exceeds 20 ⁇ m and 30 ⁇ m or less.
- Adhesion value exceeds 30 ⁇ m.
- the polyethylene film was peeled from the photosensitive resin laminate, and the transmittance of light having a wavelength of 600 nm was measured using a UV-vis spectrometer (manufactured by Shimadzu Corporation, UV-240). At this time, the same polyethylene terephthalate film as used for the photosensitive resin laminate is put on the reference side of the spectrometer, derived from the polyethylene terephthalate film. The transmittance of was canceled. Compare the transmittance of the photosensitive resin laminate stored at a temperature of 50 ° C and humidity of 60% for 3 days with the transmittance of the same photosensitive resin laminate stored at a temperature of 23 ° C and humidity of 50% for 3 days. According to the difference, the ranking was as follows.
- the present invention includes the manufacture of printed wiring boards, the manufacture of lead frames for mounting IC chips, the manufacture of metal foils such as the manufacture of metal masks, the manufacture of packages such as BGA or CSP, the manufacture of tape substrates such as COF and TAB, and the production of semiconductor bumps. It can be used for manufacturing, manufacturing of flat panel display partition walls such as ITO electrodes, address electrodes, and electromagnetic shields, and a method of manufacturing a substrate having a concavo-convex pattern by sandblasting.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymerisation Methods In General (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Manufacturing Of Printed Circuit Boards (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Materials For Photolithography (AREA)
Description
Claims
Priority Applications (3)
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JP2007525481A JP4642076B2 (ja) | 2005-07-22 | 2005-07-22 | 感光性樹脂組成物及び積層体 |
US11/989,124 US20090233230A1 (en) | 2005-07-22 | 2005-07-22 | Photosensitive Resin Composition and Laminates |
PCT/JP2005/013455 WO2007010614A1 (ja) | 2005-07-22 | 2005-07-22 | 感光性樹脂組成物及び積層体 |
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PCT/JP2005/013455 WO2007010614A1 (ja) | 2005-07-22 | 2005-07-22 | 感光性樹脂組成物及び積層体 |
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WO2007010614A1 true WO2007010614A1 (ja) | 2007-01-25 |
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PCT/JP2005/013455 WO2007010614A1 (ja) | 2005-07-22 | 2005-07-22 | 感光性樹脂組成物及び積層体 |
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US (1) | US20090233230A1 (ja) |
JP (1) | JP4642076B2 (ja) |
WO (1) | WO2007010614A1 (ja) |
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JP2009229660A (ja) * | 2008-03-21 | 2009-10-08 | Asahi Kasei E-Materials Corp | 感光性樹脂組成物および積層体 |
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US8101339B2 (en) | 2005-10-25 | 2012-01-24 | Hitachi Chemical Company, Ltd. | Photosensitive resin composition, photosensitive element comprising the same, method of forming resist pattern, and process for producing printed wiring board |
JP4985768B2 (ja) * | 2007-05-11 | 2012-07-25 | 日立化成工業株式会社 | 感光性樹脂組成物、感光性エレメント、レジストパターンの形成方法及びプリント配線板の製造方法 |
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WO2009116632A1 (ja) * | 2008-03-21 | 2009-09-24 | 旭化成イーマテリアルズ株式会社 | 感光性樹脂組成物、感光性樹脂積層体、レジストパターン形成方法、並びにプリント配線板、リードフレーム、半導体パッケージ及び凹凸基板の製造方法 |
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JP2010197831A (ja) * | 2009-02-26 | 2010-09-09 | Hitachi Chem Co Ltd | 感光性樹脂組成物、並びにこれを用いた感光性エレメント、レジストパターンの形成方法及びプリント配線板の製造方法 |
KR20170036983A (ko) * | 2015-09-25 | 2017-04-04 | 코오롱인더스트리 주식회사 | 드라이 필름 포토 레지스트용 감광성 수지 조성물 |
KR102275737B1 (ko) | 2015-09-25 | 2021-07-08 | 코오롱인더스트리 주식회사 | 드라이 필름 포토 레지스트용 감광성 수지 조성물 |
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US20090233230A1 (en) | 2009-09-17 |
JP4642076B2 (ja) | 2011-03-02 |
JPWO2007010614A1 (ja) | 2009-01-29 |
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