WO2010098183A1 - 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 - Google Patents
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 Download PDFInfo
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- WO2010098183A1 WO2010098183A1 PCT/JP2010/051494 JP2010051494W WO2010098183A1 WO 2010098183 A1 WO2010098183 A1 WO 2010098183A1 JP 2010051494 W JP2010051494 W JP 2010051494W WO 2010098183 A1 WO2010098183 A1 WO 2010098183A1
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- 0 CC(*)OC(c(cccc1)c1C(*(C)**(C)OC(C(*)=C)=O)=O)=O Chemical compound CC(*)OC(c(cccc1)c1C(*(C)**(C)OC(C(*)=C)=O)=O)=O 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—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
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
-
- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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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
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
-
- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
Definitions
- the present invention relates to a photosensitive resin composition, a photosensitive element using the same, a resist pattern forming method, and a printed wiring board manufacturing method.
- photosensitive resin compositions and photosensitive elements are widely used as resist materials used for etching and plating.
- the printed wiring board is manufactured as follows, for example. First, the photosensitive resin composition layer of the photosensitive element is laminated (laminated) on the circuit forming substrate. Next, the predetermined part of the photosensitive resin composition layer is irradiated with an actinic ray to expose and cure the predetermined part. Thereafter, the support film is peeled and removed, and then a portion other than the predetermined portion (unexposed / uncured portion) is removed (developed) from the substrate, thereby forming a cured product of the photosensitive resin composition on the substrate. A resist pattern is formed. An etching process or a plating process is performed on the obtained resist pattern to form a circuit on the substrate, and finally the resist is peeled and removed to produce a printed wiring board.
- the etching process is a method of removing the resist after etching away the conductor layer of the circuit forming substrate not covered with the resist pattern.
- the plating process is a process of plating copper and solder on the conductor layer of the circuit-forming substrate that is not covered with a resist pattern, and then removing the resist and soft etching the metal surface covered with this resist. It is a method to do.
- the exposure method conventionally, a method of exposing via a photomask using a mercury lamp as a light source has been used.
- a direct drawing exposure method called DLP (Digital Light Processing) or LDI (Laser Direct Imaging) for directly drawing pattern digital data on a photosensitive resin composition layer (for example, non-patent literature). 1).
- DLP Digital Light Processing
- LDI Laser Direct Imaging
- This direct drawing exposure method has better alignment accuracy than an exposure method through a photomask, and a high-definition pattern can be obtained. Therefore, the direct drawing exposure method is being introduced to manufacture a high-density package substrate.
- the direct drawing exposure method described above uses a monochromatic light such as a laser as a light source and irradiates a light beam while scanning the substrate, so that it takes a lot of exposure time compared to an exposure method using a conventional photomask. There is a tendency to cost. Therefore, it is necessary to further improve the sensitivity of the photosensitive resin composition as compared with the conventional case.
- the width between circuits is narrow, it is also important that the resist shape is excellent. If the cross-sectional shape of the resist is trapezoidal or inverted trapezoidal, or if the resist is skirted, it may cause a short circuit or disconnection in the circuit formed by the subsequent etching process or plating process. Is preferably rectangular and without skirting.
- the photosensitive resin composition is required to have excellent peel characteristics after curing.
- shortening the resist stripping time improves the production efficiency of the stripping process, and reducing the resist stripping piece size prevents reattachment of the stripping piece on the circuit board, resulting in a production yield. Will improve.
- Patent Document 1 discloses a photosensitive resin composition using a specific binder polymer, a sensitizing dye, or the like as a photosensitive resin composition having good sensitivity that can be applied to a direct drawing exposure method. Yes.
- Patent Document 2 discloses a photosensitive resin composition in which a polyfunctional acrylate compound is introduced to increase the number of crosslinking points in order to improve adhesion to a substrate (developer resistance).
- Patent Document 3 discloses a photosensitive resin composition using a polymerization inhibitor such as catechol or hydroquinone in order to improve the contrast (imaging property) between an exposed portion and an unexposed portion.
- a polymerization inhibitor such as catechol or hydroquinone
- the photosensitive resin composition is required to improve each characteristic such as sensitivity, resolution, adhesion, resist shape, and peeling property after curing in a well-balanced manner.
- Patent Document 1 Although the photosensitive resin composition of Patent Document 1 is good in terms of sensitivity and peeling properties, it is not necessarily sufficient in terms of resolution and adhesion.
- the photosensitive resin composition of Patent Document 2 has good adhesion, but is not sufficient in terms of peeling characteristics, and the cured product tends to be difficult to peel off from the substrate.
- Patent Document 3 Although the photosensitive resin composition of Patent Document 3 is good in terms of resolution, adhesion, and imaging properties, it is not sufficient in terms of sensitivity, and requires a lot of exposure time when using a direct drawing exposure method.
- none of the conventional photosensitive resin compositions sufficiently satisfy each characteristic required for the photosensitive resin composition after the formation of the resist pattern in a well-balanced manner.
- the present invention provides a photosensitive resin composition having good sensitivity, resolution, adhesion, resist shape and release properties after curing, a photosensitive element using the same, a method for forming a resist pattern, and It aims at providing the manufacturing method of a printed wiring board.
- the present invention provides a photosensitive resin composition containing (A) a binder polymer, (B) a photopolymerizable compound, (C) a photopolymerization initiator, and (D) a sensitizing dye.
- the binder polymer has a structural unit based on (meth) acrylic acid and a structural unit based on (meth) acrylic acid benzyl ester or (meth) acrylic acid benzyl ester derivative, and (B) photopolymerization.
- the photosensitive compound includes a compound having one ethylenically unsaturated bond
- the sensitizing dye includes a compound represented by the following general formula (1).
- R 1 and R 2 each independently represents a substituted or unsubstituted phenyl group, thienyl group or furyl group
- R 3 represents an alkyl group having 1 to 10 carbon atoms, or 1 to 10 carbon atoms.
- a and b each independently represent an integer of 0 to 2
- m represents an integer of 0 to 5
- a plurality of R 3 may be the same or different.
- the photosensitive resin composition of the present invention has the above-described configuration, the sensitivity, resolution, adhesion, resist shape, and release characteristics after curing are all good.
- the present inventors can improve resolution and peelability after curing by using a (A) binder polymer having a specific structural unit, and include a compound having one ethylenically unsaturated bond (B).
- A binder polymer having a specific structural unit
- B ethylenically unsaturated bond
- the resolution, adhesion, resist shape and release properties after curing can be improved in a balanced manner, and by using a (D) sensitizing dye containing the compound represented by the above general formula, It is presumed that the photosensitive resin composition satisfying all of the above characteristics could be obtained by combining the sensitivity.
- the photopolymerizable compound may contain a compound represented by the following general formula (2) or the following general formula (3).
- R 4 represents a hydrogen atom or a methyl group
- R 5 represents a hydrogen atom, a methyl group or a halogenated methyl group
- R 6 represents an alkyl group having 1 to 6 carbon atoms
- 6 represents an alkoxy group, a hydroxyl group or a halogen atom
- n represents an integer of 0 to 4
- p represents an integer of 1 to 4
- a plurality of R 6 may be the same or different. May be.
- R 7 represents a hydrogen atom or a methyl group
- R 8 represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a hydroxyl group or a halogen atom
- r represents 1 to 12 represents an integer
- k represents an integer of 0 to 5
- a plurality of R 8 may be the same or different.
- the resolution, adhesion, resist shape, and release characteristics after curing of the photosensitive resin composition are improved in a more balanced manner.
- the (B) photopolymerizable compound may further contain a bisphenol A di (meth) acrylate compound. Thereby, alkali developability, resolution, and peeling characteristics after curing are further improved.
- the photopolymerizable compound can further contain a trimethylolpropane tri (meth) acrylate compound having a (poly) oxyethylene chain or a (poly) oxypropylene chain.
- a trimethylolpropane tri (meth) acrylate compound having a (poly) oxyethylene chain or a (poly) oxypropylene chain.
- the photopolymerizable compound can further contain a polyalkylene glycol di (meth) acrylate having a (poly) oxyethylene chain and a (poly) oxypropylene chain.
- a polyalkylene glycol di (meth) acrylate having a (poly) oxyethylene chain and a (poly) oxypropylene chain.
- the alkali developability and the release property after curing can be further improved.
- (A) binder polymer can further have the structural unit based on styrene or a styrene derivative, and, thereby, the resolution and adhesiveness of the photosensitive resin composition further improve.
- the acid value of (A) the binder polymer is preferably 100 to 250 mgKOH / g. Thereby, the alkali developability of the photosensitive resin composition is further improved.
- the weight average molecular weight of the (A) binder polymer is preferably 10,000 to 100,000. Thereby, the alkali developability and adhesiveness of the photosensitive resin composition can be improved in a more balanced manner.
- the photosensitive resin composition of the present invention may further contain (E) an amine compound.
- the present invention also provides a photosensitive element comprising a support film and a photosensitive resin composition layer made of the photosensitive resin composition formed on the support film.
- a photosensitive element of the present invention By using the photosensitive element of the present invention, a resist pattern having good resolution, adhesion, resist shape, and release characteristics after curing can be efficiently formed with high sensitivity.
- the present invention further includes a laminating step of laminating a photosensitive resin composition layer comprising the above photosensitive resin composition on a substrate, and exposing the predetermined portion by irradiating a predetermined portion of the photosensitive resin composition layer with actinic rays. And an exposure step for curing, and a development step for forming a resist pattern made of a cured product of the photosensitive resin composition on the substrate by removing portions other than the predetermined portion of the photosensitive resin composition layer from the substrate. And a method for forming a resist pattern. As a result, a resist pattern having excellent resolution, adhesion, resist shape, and release characteristics after curing can be efficiently formed with high sensitivity.
- the wavelength of the actinic ray is preferably 390 to 420 nm.
- the present invention also provides a method for manufacturing a printed wiring board, including a step of etching or plating a substrate on which a resist pattern has been formed by the method for forming a resist pattern.
- a printed wiring board having high-density wiring such as a high-density package substrate and silicon chip rewiring can be manufactured with high accuracy and efficiency.
- a photosensitive resin composition having good sensitivity, resolution, adhesion, resist shape and release properties after curing, a photosensitive element using the same, a method for forming a resist pattern, and A method for manufacturing a printed wiring board can be provided.
- FIG. 5 is a schematic cross-sectional view for explaining “bottoming” in a resist pattern. It is a schematic cross section for explaining “development residue” in a resist pattern.
- (meth) acrylic acid means acrylic acid or methacrylic acid
- (meth) acrylate means acrylate or methacrylate
- (meth) acryloyl group means acryloyl group or methacryloyl.
- the (poly) oxyethylene chain means an oxyethylene group or a polyoxyethylene chain
- the (poly) oxypropylene chain means an oxypropylene group or a polyoxypropylene chain.
- the photosensitive resin composition of the present embodiment comprises (A) a binder polymer (hereinafter also referred to as “component (A)”), (B) a photopolymerizable compound (hereinafter also referred to as “component (B)”), ( C) A photopolymerization initiator (hereinafter also referred to as “(C) component”) and (D) a sensitizing dye (hereinafter also referred to as “(D) component”).
- component (A) a binder polymer
- component (B) a photopolymerizable compound
- component (C) component A photopolymerization initiator
- (D) component a sensitizing dye
- the binder polymer as the component (A) has a structural unit based on (meth) acrylic acid and a structural unit based on a (meth) acrylic acid benzyl ester or a (meth) acrylic acid benzyl ester derivative.
- a binder polymer can be produced, for example, by radical polymerization of (meth) acrylic acid and (meth) acrylic acid benzyl ester or (meth) acrylic acid benzyl ester derivative. If necessary, other polymerizable monomers may be copolymerized.
- Examples of (meth) acrylic acid benzyl ester derivatives include those having a substituent at the benzyl position and / or the phenyl group of (meth) acrylic acid benzyl ester.
- the content of the structural unit based on (meth) acrylic acid benzyl ester or (meth) acrylic acid benzyl ester derivative in component (A) is the total mass of component (A) from the viewpoint of resolution and peelability after curing. Is preferably 5 to 65% by mass, more preferably 10 to 55% by mass, and still more preferably 20 to 45% by mass. If this content is less than 5% by mass, sufficient resolution tends to be difficult to obtain, and if this content exceeds 65% by mass, the peel piece tends to be large and the peel time tends to be long. .
- Examples of other polymerizable monomers other than (meth) acrylic acid, (meth) acrylic acid benzyl ester or (meth) acrylic acid benzyl ester derivative include ⁇ -position such as styrene, vinyltoluene, ⁇ -methylstyrene or the like.
- Acrylic acid derivatives such as maleic acid, maleic anhydride, monomethyl maleate, monoethyl maleate, monoisopropyl maleate; fumaric acid, cinnamic acid, ⁇ -cyanocinnamic acid, itaconic acid, crotonic acid, Examples include organic acid derivatives such as propiolic acid and acrylonitrile. These can be used alone or in any combination of two or more.
- the binder polymer preferably contains a structural unit based on an alkyl (meth) acrylate from the viewpoint of improving alkali developability and release properties.
- the content is 1 to 50 on the basis of the total mass of the component (A). It is preferable that it is mass%.
- the content is preferably 1% by mass or more, more preferably 2% by mass or more, and still more preferably 3% by mass or more in terms of further improving peelability.
- the content is preferably 50% by mass or less, more preferably 30% by mass or less, and still more preferably 20% by mass or less from the viewpoint of further improving the resolution and adhesion after alkali development.
- Examples of the (meth) acrylic acid alkyl ester include compounds represented by the following general formula (4).
- R 9 represents a hydrogen atom or a methyl group
- R 10 represents an alkyl group having 1 to 12 carbon atoms.
- Examples of the alkyl group having 1 to 12 carbon atoms represented by R 10 in the formula (4) include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, A decyl group, an undecyl group, a dodecyl group, and these structural isomers are mentioned. From the viewpoint of further improving the peeling characteristics, the alkyl group is preferably one having 4 or less carbon atoms.
- Examples of the compound represented by the general formula (4) include (meth) acrylic acid methyl ester, (meth) acrylic acid ethyl ester, (meth) acrylic acid propyl ester, (meth) acrylic acid butyl ester, (meta ) Acrylic acid pentyl ester, (meth) acrylic acid hexyl ester, (meth) acrylic acid heptyl ester, (meth) acrylic acid octyl ester, (meth) acrylic acid 2-ethylhexyl ester, (meth) acrylic acid nonyl ester, (meth) ) Acrylic acid decyl ester, (meth) acrylic acid undecyl ester, (meth) acrylic acid dodecyl ester. These can be used alone or in any combination of two or more.
- the binder polymer may further contain a structural unit based on styrene or a derivative thereof from the viewpoint of improving the resolution, adhesion, and peeling properties in a well-balanced manner.
- the content thereof is 5 to 65 masses based on the total mass of the component (A) from the viewpoint of resolution, adhesion, and peeling properties. % Is preferred.
- the content is preferably 5% by mass or more, more preferably 10% by mass or more, further preferably 15% by mass or more, and particularly preferably 20% by mass or more. 30 mass% or more is very preferable.
- the content is preferably 65% by mass or less, more preferably 60% by mass or less, still more preferably 55% by mass or less, and particularly preferably 50% by mass or less in terms of further improving peelability.
- the acid value of the binder polymer is preferably 100 to 250 mgKOH / g.
- the acid value of the binder polymer is preferably 100 mgKOH / g or more, more preferably 120 mgKOH / g or more, still more preferably 140 gKOH / g or more, and particularly preferably 150 mgKOH / g or more.
- the acid value of the binder polymer is preferably 250 mgKOH / g or less, more preferably 230 mgKOH / g or less, still more preferably 220 mgKOH / g or less, particularly 210 mgKOH / g or less in terms of excellent developer resistance (adhesion). preferable.
- the weight average molecular weight (Mw) of the binder polymer is preferably 10,000 to 100,000 when measured by gel permeation chromatography (GPC) (converted with a calibration curve using standard polystyrene).
- Mw of the binder polymer is preferably 10,000 or more, more preferably 20,000 or more, and further preferably 25,000 or more, from the viewpoint of improving the developer resistance (adhesion) of the cured product of the photosensitive resin composition.
- the Mw of the binder polymer is preferably 100,000 or less, more preferably 80000 or less, and even more preferably 70000 or less from the viewpoint of excellent alkali developability.
- the degree of dispersion (Mw / Mn) of the binder polymer is preferably 1.0 to 3.0, and more preferably 1.0 to 2.0. In the point which is excellent in adhesiveness and resolution, 3.0 or less is preferable and 2.0 or less is more preferable.
- the binder polymer may have, in the molecule, a characteristic group having photosensitivity to light having a wavelength in the range of 350 to 440 nm, if necessary.
- binder polymer As the binder polymer, one type of binder polymer can be used alone, or two or more types of binder polymers can be used in any combination.
- a binder polymer in the case of using two or more types in combination, for example, two or more types of binder polymers comprising different copolymer components (including different monomer units as copolymer components), two or more types of different weight average molecular weights
- the binder polymer include two or more binder polymers having different degrees of dispersion.
- a polymer having a multimode molecular weight distribution described in JP-A No. 11-327137 can also be used.
- the content of the component (A) is preferably 30 to 70 parts by mass with respect to 100 parts by mass as the total of the components (A) and (B).
- 30 mass parts or more are preferable, 35 mass parts or more are more preferable, and 40 mass parts or more are still more preferable.
- 70 mass parts or less are preferable at the point which is excellent in a sensitivity and resolution, 65 mass parts or less are more preferable, and 60 mass parts or less are still more preferable.
- the photopolymerization compound as the component (B) includes a compound having one ethylenically unsaturated bond in the molecule.
- the content thereof may include 1 to 30 parts by mass with respect to 100 parts by mass of the total mass of the component (B).
- 3 to 25 parts by mass are contained, more preferably 5 to 20 parts by mass.
- Examples of the photopolymerizable compound having one ethylenically unsaturated bond in the molecule include compounds represented by the following general formula (2), the following general formula (3), and the aforementioned (meth) acrylic acid alkyl esters. Although it is mentioned, it is preferable that the compound represented by the following general formula (2) or the following general formula (3) is included from the viewpoint of obtaining the effect of the present invention better.
- R 4 represents a hydrogen atom or a methyl group.
- R 5 represents a hydrogen atom, a methyl group or a halogenated methyl group, preferably a methyl group or a halogenated methyl group, and more preferably a halogenated methyl group.
- the halogenated methyl group include a methyl group substituted with a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an astatine atom or the like.
- R 6 represents an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a hydroxyl group or a halogen atom, and the alkyl group having 1 to 6 carbon atoms or the alkoxy group having 1 to 6 carbon atoms is linear Or branched.
- P represents an integer of 1 to 4 and is preferably an integer of 1 to 3.
- n represents an integer of 0 to 4. When n is 2 to 4, a plurality of R 6 may be the same or different.
- Examples of the compound represented by the general formula (2) include ⁇ -chloro- ⁇ -hydroxypropyl- ⁇ ′-(meth) acryloyloxyethyl-o-phthalate, ⁇ -hydroxyethyl- ⁇ ′-(meth).
- Examples include acryloyloxyethyl-o-phthalate and ⁇ -hydroxypropyl- ⁇ ′-(meth) acryloyloxyethyl-o-phthalate, among which ⁇ -chloro- ⁇ -hydroxypropyl- ⁇ ′-(meth) acryloyloxy Ethyl-o-phthalate is preferred.
- ⁇ -Chloro- ⁇ -hydroxypropyl- ⁇ '-methacryloyloxyethyl-o-phthalate is commercially available as FA-MECH (trade name, manufactured by Hitachi Chemical Co., Ltd.). These may be used alone or in combination of two or more.
- R 7 represents a hydrogen atom or a methyl group.
- R 8 represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a hydroxyl group or a halogen atom, preferably an alkyl group having 1 to 12 carbon atoms, and an alkyl group having 6 to 12 carbon atoms More preferably, it is a group.
- r represents an integer of 1 to 12, preferably an integer of 3 to 10, and more preferably an integer of 4 to 8.
- k represents an integer of 0 to 5, and when k is 2 to 5, a plurality of R 8 may be the same or different.
- Examples of the compound represented by the general formula (3) include nonylphenoxytriethyleneoxyacrylate, nonylphenoxytetraethyleneoxyacrylate, nonylphenoxypentaethyleneoxyacrylate, nonylphenoxyhexaethyleneoxyacrylate, nonylphenoxyheptaethyleneoxyacrylate.
- the component (B) preferably further contains a photopolymerizable compound having two or more ethylenically unsaturated bonds in the molecule from the viewpoint of improving sensitivity, resolution, and adhesion.
- the photopolymerizable compound having two or more ethylenically unsaturated bonds in the molecule can be obtained, for example, by reacting a bisphenol A di (meth) acrylate compound or a polyhydric alcohol with an ⁇ , ⁇ -unsaturated carboxylic acid.
- Examples thereof include compounds, urethane monomers such as (meth) acrylate compounds having a urethane bond in the molecule, and compounds obtained by reacting a glycidyl group-containing compound with an ⁇ , ⁇ -unsaturated carboxylic acid. These can be used alone or in combination of two or more.
- the photopolymerizable compound preferably contains a bisphenol A-based di (meth) acrylate compound from the viewpoint of improving resolution and peeling properties after curing.
- bisphenol A-based di (meth) acrylate compounds examples include 2,2-bis (4-((meth) acryloxypolyethoxy) phenyl) propane and 2,2-bis (4-((meth) acryloxypoly).
- Propoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxypolybutoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxypolyethoxypolypropoxy) phenyl) propane Can be mentioned.
- 2,2-bis (4-((meth) acryloxypolyethoxy) phenyl) propane is preferable from the viewpoint of further improving the resolution and peeling properties.
- 2,2-bis (4-((meth) acryloxypolyethoxy) phenyl) propane examples include 2,2-bis (4-((meth) acryloxydiethoxy) phenyl) propane, 2,2- Bis (4-((meth) acryloxytriethoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxytetraethoxy) phenyl) propane, 2,2-bis (4-((meth)) Acryloxypentaethoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxyhexaethoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxyheptaethoxy) phenyl) propane 2,2-bis (4-((meth) acryloxyoctaethoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxynonato) C) phenyl) propane, 2,2-bis (4-((meth) acryloxydeca
- 2,2-bis (4- (methacryloxypentaethoxy) phenyl) propane is BPE-500 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.) or FA-321M (manufactured by Hitachi Chemical Co., Ltd., (Commercial name) is commercially available.
- BPE-1300 trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.
- 2,2-bis (4-((meth) acryloxypolypropoxy) phenyl) propane examples include 2,2-bis (4-((meth) acryloxydipropoxy) phenyl) propane, 2,2- Bis (4-((meth) acryloxytripropoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxytetrapropoxy) phenyl) propane, 2,2-bis (4-((meth)) Acryloxypentapropoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxyhexapropoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxyheptapropoxy) phenyl) propane 2,2-bis (4-((meth) acryloxyoctapropoxy) phenyl) propane, 2,2-bis (4-((meth) actyl) Roxinonapropoxy) phenyl) propane, 2,2-bis (4-((meth) acryloxydecapropoxy) phen
- Examples of 2,2-bis (4-((meth) acryloxypolyethoxypolypropoxy) phenyl) propane include 2,2-bis (4-((meth) acryloxydiethoxyoctapropoxy) phenyl) propane, Examples include 2,2-bis (4-((meth) acryloxytetraethoxytetrapropoxy) phenyl) propane and 2,2-bis (4-((meth) acryloxyhexaethoxyhexapropoxy) phenyl) propane.
- the content is preferably 20 to 80% by mass, and preferably 30 to 70% by mass based on the total mass of the component (B). Is more preferred.
- Examples of the compound obtained by reacting a polyhydric alcohol with an ⁇ , ⁇ -unsaturated carboxylic acid include, for example, polyethylene glycol di (meth) acrylate having 2 to 14 ethylene groups, and 2 to 14 propylene groups.
- EO-modified means a compound (polyoxyethylenated compound) having a block structure of a (poly) oxyethylene chain
- PO-modified means (poly) oxypropylene. This means a compound having a chain block structure (compound converted to polyoxypropylene), and “EO / PO modified” has a block structure of (poly) oxyethylene chain and (poly) oxypropylene chain. It means that the compound is a compound (polyoxyethylenated and polyoxypropylenated compound).
- tetramethylolmethane triacrylate is A-TMM-3 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.), and EO-modified trimethylolpropane trimethacrylate is TMPT21E, TMPT30E (manufactured by Hitachi Chemical Co., Ltd., (Commercial name) is commercially available.
- (B) component is a (poly) oxyethylene chain or (poly) oxypropylene chain in a molecule
- numerator from a viewpoint which improves alkali developability, resolution, adhesiveness, and the peeling property after hardening in a more balanced manner.
- a trimethylolpropane tri (meth) acrylate compound having a (poly) oxyethylene chain in the molecule is preferable.
- the content thereof is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, based on the total mass of the (B) photopolymerizable compound. preferable.
- the component (B) is a polyalkylene having a (poly) oxyethylene chain and a (poly) oxypropylene chain in the molecule from the viewpoint of improving the flexibility of the cured product (cured film) of the photosensitive resin composition.
- Glycol di (meth) acrylate can be included.
- the content thereof is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, based on the total mass of the (B) photopolymerizable compound. preferable.
- polyalkylene glycol di (meth) acrylate As polyalkylene glycol di (meth) acrylate, (poly) oxyethylene chain and (poly) oxypropylene chain ((poly) oxy-n-propylene) chain or (poly) as (poly) oxyalkylene chain in the molecule Those having an oxyisopropylene chain) are preferred.
- polyalkylene glycol di (meth) acrylate further includes (poly) oxy-n-butylene chain, (poly) oxyisobutylene chain, (poly) oxy-n-pentylene chain, (poly) oxyhexylene chain, These structural isomers and the like may have a (poly) oxyalkylene chain having about 4 to 6 carbon atoms.
- the (poly) oxyethylene chain and the (poly) oxypropylene chain may be continuously present in blocks or randomly.
- the secondary carbon of the propylene group may be bonded to an oxygen atom, or the primary carbon may be bonded to an oxygen atom.
- polyalkylene glycol di (meth) acrylate a compound represented by the following general formula (5), (6) or (7) is particularly preferable. These can be used alone or in combination of two or more.
- R each independently represents a hydrogen atom or a methyl group
- EO represents an oxyethylene group
- PO represents an oxypropylene group
- m 1 , m 2 , m 3 and m 4 represent the number of repeating structural units composed of oxyethylene groups
- n 1 , n 2 , n 3 and n 4 represent the number of repeating structural units composed of oxypropylene groups.
- the total number of repeating oxyethylene groups m 1 + m 2 , m 3 and m 4 each independently represents an integer of 1 to 30, and the total number of repeating oxypropylene groups n 1 , n 2 + n 3 and n 4 (average value) independently represents an integer of 1 to 30.
- the total number of repeating oxyethylene groups m 1 + m 2 , m 3 and m 4 is an integer of 1 to 30, An integer of 10 is preferable, an integer of 4 to 9 is more preferable, and an integer of 5 to 8 is still more preferable.
- the total number of repeating oxyethylene groups is preferably 30 or less, more preferably 10 or less, still more preferably 9 or less, and particularly preferably 8 or less.
- the total number of repeating oxypropylene groups n 1 , n 2 + n 3 and n 4 is an integer of 1 to 30, preferably an integer of 5 to 20, more preferably an integer of 8 to 16, more preferably 10 to 14. An integer is more preferred. In terms of excellent resolution and sludge reduction, the total number of repeating oxypropylene groups is preferably 30 or less, more preferably 20 or less, still more preferably 16 or less, and particularly preferably 14 or less.
- R hydrogen atom
- m 4 1 (average value)
- n 4 9 (average value) vinyl compound (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name) “NK ester HEMA-9P”) and the like. These can be used alone or in combination of two or more.
- Examples of the (meth) acrylate compound having a urethane bond in the molecule include a (meth) acryl monomer having an OH group at the ⁇ -position and a diisocyanate compound (isophorone diisocyanate, 2,6-toluene diisocyanate, 2,4-toluene diisocyanate, 1,6-hexamethylene diisocyanate, etc.), tris ((meth) acryloxytetraethylene glycol isocyanate) hexamethylene isocyanurate, EO-modified urethane di (meth) acrylate, EO, PO-modified urethane di (meth) acrylate Can be mentioned.
- a diisocyanate compound isophorone diisocyanate, 2,6-toluene diisocyanate, 2,4-toluene diisocyanate, 1,6-hexamethylene diisocyanate, etc.
- tris ((meth)
- Examples of the EO-modified urethane di (meth) acrylate include UA-11 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.).
- Examples of EO and PO-modified urethane di (meth) acrylate include UA-13 (trade name, manufactured by Shin-Nakamura Chemical Co., Ltd.). These are used alone or in combination of two or more.
- the content of the component (B) (photopolymerizable compound) is preferably 30 to 70 parts by mass with respect to 100 parts by mass as the total of the components (A) and (B). In terms of improving sensitivity and resolution, the content of the component (B) is preferably 30 parts by mass or more, more preferably 35 parts by mass or more, and still more preferably 40 parts by mass or more.
- the content of the component (B) is preferably 70 parts by mass or less, more preferably 65 parts by mass or less, and still more preferably 60 parts by mass or less in terms of imparting film properties and excellent resist shape after curing.
- the photopolymerization initiator is not particularly limited as long as it has a light wavelength of an exposure machine to be used and (C) a wavelength that is necessary for the functional expression of the photopolymerization initiator. It can be used without.
- (C) As a photopolymerization initiator, for example, benzophenone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1,2-methyl-1- [4- (methylthio) phenyl]- Aromatic ketones such as 2-morpholino-propanone-1; quinones such as alkylanthraquinones; benzoin ether compounds such as benzoin alkyl ether; benzoin compounds such as benzoin and alkylbenzoin; benzyl derivatives such as benzyldimethyl ketal; 2,4,5-triarylimidazole dimers such as -chlorophenyl) -4,5-diphenylimidazole dimer, 2- (o-fluorophenyl) -4,5-diphenylimidazole dimer; 9-phenyl Acridine, 1,7- (9,9′-acridinyl) heptane, etc. Examples include klys
- the content of the component (C) is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass as the total of the components (A) and (B).
- the content of the component (C) is preferably 0.1 parts by mass or more, more preferably 1 part by mass or more, still more preferably 2 parts by mass or more, and 3 parts by mass in terms of excellent sensitivity, resolution, or adhesion. The above is particularly preferable.
- the content of the component (C) is preferably 10 parts by mass or less, more preferably 7 parts by mass or less, still more preferably 6 parts by mass or less, and particularly preferably 5 parts by mass or less in that the resist shape after curing is excellent. preferable.
- sensitizing dye as component (D) contains a compound represented by the following general formula (1).
- R 1 and R 2 each independently represent a substituted or unsubstituted phenyl group, a thienyl group or a furyl group, and from the viewpoint of further improving the resolution, a substituted or unsubstituted phenyl group Preferably there is.
- the substituent include an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkyl ester group having 1 to 10 carbon atoms, and an alkyl group having 1 to 10 carbon atoms or 1 to 10 carbon atoms. It is preferably an alkoxy group having 10 carbon atoms, more preferably an alkyl group having 3 to 8 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.
- a and b each independently represent an integer of 0 to 2.
- R 3 represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkyl ester group having 1 to 10 carbon atoms. Among these, an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms is preferable, and an alkyl group having 3 to 8 carbon atoms or an alkoxy group having 1 to 5 carbon atoms is more preferable.
- m represents an integer of 0 to 5. When m is 2 to 5, a plurality of R 3 may be the same as or different from each other.
- the substituents R 1 to R 3 are preferably an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 10 carbon atoms from the viewpoint of further improving sensitivity and solubility in a solvent.
- the alkyl group having 1 to 10 carbon atoms or the alkoxy group having 1 to 10 carbon atoms may be linear or branched.
- Examples of the alkyl group having 1 to 10 carbon atoms include, but are not limited to, a methyl group, an ethyl group, an isopropyl group, an n-butyl group, a tert-butyl group, an isopentyl group, and a tert-octyl group.
- the sum of a and b in the general formula (1) is preferably 1 to 6, more preferably 1 to 4, and still more preferably 1 to 3.
- Examples of the compound represented by the general formula (1) include 1- (4-methoxyphenyl) -3-styryl-5-phenyl-pyrazoline, 1-phenyl-3- (4-methoxystyryl) -5- (4-methoxyphenyl) -pyrazoline, 1,5-bis- (4-methoxyphenyl) -3- (4-methoxystyryl) -pyrazoline, 1- (4-isopropylphenyl) -3-styryl-5-phenyl- Pyrazoline, 1-phenyl-3- (4-isopropylstyryl) -5- (4-isopropylphenyl) -pyrazoline, 1,5-bis- (4-isopropylphenyl) -3- (4-isopropylstyryl) -pyrazoline, 1- (4-Methoxyphenyl) -3- (4-tert-butyl-styryl) -5- (4-tert-butyl-phenyl) -pyr
- 1-phenyl-3- (4-methoxystyryl) -5- (4-methoxyphenyl) -pyrazoline is particularly preferable from the viewpoint of improving the ease of synthesis and sensitivity. Further, 1-phenyl-3- (4-isopropylstyryl) -5- (4-isopropylphenyl) -pyrazoline is particularly preferable from the viewpoint of improving the ease of synthesis and solubility in a solvent.
- the content of the compound represented by the general formula (1) is 10 to 100% by mass based on the total mass of the component (D) in terms of excellent sensitivity and resolution. It is preferably 30 to 100% by mass, more preferably 50 to 100% by mass.
- the photosensitive resin composition of the present invention can be mixed with a sensitizing dye other than the compound represented by the general formula (1) to the extent that the effects of the present invention are not impaired.
- a sensitizing dye other than the compound represented by the general formula (1) to the extent that the effects of the present invention are not impaired.
- the content of the component (D) is preferably 0.01 to 10 parts by mass with respect to 100 parts by mass of the total amount of the components (A) and (B).
- the content of the component (D) is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, and further preferably 0.1 parts by mass or more.
- the content of the component (D) is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and still more preferably 3 parts by mass or less.
- the photosensitive resin composition of this embodiment can contain an amine compound as the component (E) from the viewpoint of further improving the sensitivity.
- (E) amine compounds include bis [4- (dimethylamino) phenyl] methane, bis [4- (diethylamino) phenyl] methane, and leucocrystal violet. These can be used alone or in combination of two or more.
- the content of the component (E) is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, and further preferably 0.1 parts by mass or more.
- the content of component (D) is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and 2 parts by mass or less. Is more preferable.
- the photosensitive resin composition of the present embodiment includes a photopolymerizable compound (such as an oxetane compound) having at least one cationically polymerizable cyclic ether group in the molecule, a cationic polymerization initiator, malachite green, and the like.
- a photopolymerizable compound such as an oxetane compound
- a cationic polymerization initiator such as malachite green, and the like.
- Photochromic agents such as dyes, tribromophenyl sulfone and leuco crystal violet, thermochromic inhibitors, plasticizers such as p-toluenesulfonamide, pigments, fillers, antifoaming agents, flame retardants, stabilizers, adhesion promoters , A leveling agent, a peeling accelerator, an antioxidant, a fragrance, an imaging agent, and a thermal crosslinking agent. These can be used alone or in combination of two or more. These contents are preferably about 0.01 to 20 parts by mass with respect to 100 parts by mass of the total amount of the component (A) and the component (B).
- the photosensitive resin composition of the present embodiment can be used as a solution (coating solution) having a solid content of about 30 to 60% by mass dissolved in an organic solvent.
- organic solvent include methanol, ethanol, acetone, methyl ethyl ketone, methyl cellosolve, ethyl cellosolve, toluene, N, N-dimethylformamide, propylene glycol monomethyl ether, or a mixed solvent thereof.
- the photosensitive resin composition layer composed of the photosensitive resin composition of the present embodiment can be formed by applying the coating liquid on the surface of a metal plate or the like and drying it.
- the metal plate include iron alloys such as copper, copper alloys, nickel, chromium, iron, and stainless steel, preferably copper, copper alloys, and iron alloys.
- the thickness of the photosensitive resin composition layer varies depending on its use, but is preferably about 1 to 100 ⁇ m after drying. You may coat
- the protective film include polymer films such as polyethylene and polypropylene.
- the photosensitive element 1 of the present invention includes a support film 2 and a photosensitive resin composition layer 3 formed on the support film 2, and if necessary, the photosensitive resin composition layer 3.
- a protective film 4 is further provided thereon.
- the photosensitive resin composition layer 3 made of the photosensitive resin composition can be formed on the support film 2 by applying the solution of the photosensitive resin composition onto the support film 2 and drying it.
- the photosensitive element 1 of this embodiment provided with the support film 2 and the photosensitive resin composition layer 3 formed on this support film 2 is obtained.
- the support film a polymer film having heat resistance and solvent resistance such as polyester such as polyethylene terephthalate, polypropylene, and polyethylene can be used.
- the thickness of the support film (polymer film) is preferably from 1 to 100 ⁇ m, more preferably from 5 to 50 ⁇ m, and more preferably from 5 to 30 ⁇ m in view of the influence on the strength and resolution. Further preferred. When the thickness is less than 1 ⁇ m, the support film tends to be easily broken when the support film is peeled off. In order not to affect the resolution, it is preferably 100 ⁇ m or less, more preferably 50 ⁇ m or less, and further preferably 30 ⁇ m or less.
- the photosensitive element 1 may be provided with the protective film 4 which coat
- the protective film preferably has a lower adhesive force to the photosensitive resin composition layer than that of the support film to the photosensitive resin composition layer, and is preferably a low fish eye film.
- fish eye means that foreign materials, undissolved materials, oxidatively deteriorated materials, etc. of the material are contained in the film when the material is melted by heat, kneaded, extruded, biaxially stretched, casting method, etc. It means what was taken in. That is, “low fish eye” means that the above-mentioned foreign matter or the like in the film is small.
- a polymer film having heat resistance and solvent resistance such as polyester such as polyethylene terephthalate, polypropylene, polyethylene, polyester, or the like can be used.
- polyester such as polyethylene terephthalate, polypropylene, polyethylene, polyester, or the like
- examples of commercially available products include polypropylene films such as Alfan MA-410 and E-200C manufactured by Oji Paper Co., Ltd., Shin-Etsu Film Co., Ltd., and polyethylene terephthalate films such as PS series such as PS-25 manufactured by Teijin Limited.
- the protective film may be the same as the support film.
- the thickness of the protective film is preferably 1 to 100 ⁇ m, more preferably 5 to 50 ⁇ m, still more preferably 5 to 30 ⁇ m, and particularly preferably 15 to 30 ⁇ m.
- the thickness is less than 1 ⁇ m, the protective film tends to be broken when the photosensitive resin composition layer and the protective film are laminated (laminated) on the substrate, and when the thickness exceeds 100 ⁇ m, the cost is sufficient. There is a tendency to disappear.
- photosensitive resin composition solution onto the support film can be performed by a known method such as a roll coater, comma coater, gravure coater, air knife coater, die coater, bar coater or the like.
- the above solution is preferably dried at 70 to 150 ° C. for about 5 to 30 minutes. After drying, the amount of the remaining organic solvent in the photosensitive resin composition layer is preferably 2 parts by mass or less from the viewpoint of preventing diffusion of the organic solvent in the subsequent step.
- the thickness of the photosensitive resin composition layer in the photosensitive element varies depending on the use, but is preferably 1 to 100 ⁇ m, more preferably 1 to 50 ⁇ m, and more preferably 5 to 40 ⁇ m after drying. Further preferred. When this thickness is less than 1 ⁇ m, it tends to be difficult to apply industrially, and when it exceeds 100 ⁇ m, it tends to be difficult to obtain sufficient adhesion and resolution.
- the transmittance of the photosensitive resin composition layer with respect to ultraviolet rays is preferably 5 to 75% with respect to ultraviolet rays having a wavelength of 405 nm. In terms of excellent adhesion, this transmittance is preferably 5% or more, more preferably 10% or more, and further preferably 15% or more. In terms of excellent resolution, 75% or less is preferable, 65% or less is more preferable, and 55% or less is even more preferable.
- the transmittance can be measured with a UV spectrometer.
- UV spectrometer examples include a 228A type W beam spectrophotometer manufactured by Hitachi, Ltd.
- the photosensitive element may further include an intermediate layer such as a cushion layer, an adhesive layer, a light absorption layer, and a gas barrier layer.
- an intermediate layer such as a cushion layer, an adhesive layer, a light absorption layer, and a gas barrier layer.
- the obtained photosensitive element can be stored in the form of a sheet or a roll wound around a core.
- the core include plastics such as polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, and ABS resin (acrylonitrile-butadiene-styrene copolymer).
- plastics such as polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, and ABS resin (acrylonitrile-butadiene-styrene copolymer).
- end face separator it is preferable to install an end face separator on the end face of the roll-shaped photosensitive element roll thus obtained, and it is preferable to install a moisture-proof end face separator from the standpoint of edge fusion resistance.
- As a packaging method it is preferable to wrap and package in a black sheet with low moisture permeability.
- a resist pattern can be formed using the photosensitive resin composition of the present invention.
- the resist pattern forming method according to the present embodiment includes (i) a lamination step of laminating a photosensitive resin composition layer composed of the photosensitive resin composition on a substrate, and (ii) a predetermined photosensitive resin composition layer. An exposure step of irradiating a portion with actinic rays to expose and cure the predetermined portion; and (iii) removing a portion other than the predetermined portion of the photosensitive resin composition layer from the substrate, Development step of forming a resist pattern made of a cured product of the conductive resin composition.
- the photosensitive resin composition layer which consists of a photosensitive resin composition is laminated
- a substrate circuit forming substrate
- Lamination of the photosensitive resin composition layer on the substrate is performed, for example, by removing the protective film of the photosensitive element and then press-bonding the photosensitive resin composition layer of the photosensitive element to the substrate while heating. Is called.
- the laminated body which consists of a board
- This lamination operation is preferably performed under reduced pressure from the viewpoint of adhesion and followability.
- Heating of the photosensitive resin composition layer and / or the substrate at the time of pressure bonding is preferably performed at a temperature of 70 to 130 ° C., and at a pressure of about 0.1 to 1.0 MPa (about 1 to 10 kgf / cm 2 ).
- pressure bonding is preferable, these conditions are not particularly limited. If the photosensitive resin composition layer is heated to 70 to 130 ° C., it is not necessary to preheat the substrate in advance, but the substrate can be preheated in order to further improve the laminate property.
- the predetermined portion of the photosensitive resin composition layer on the substrate is irradiated with actinic rays to expose and cure the predetermined portion.
- the support film present on the photosensitive resin composition layer is transmissive to actinic rays, it can be irradiated with actinic rays through the support film, but the support film is light-shielding.
- the photosensitive resin composition layer is irradiated with actinic rays.
- Examples of the exposure method include a method of irradiating an image with active light through a negative or positive mask pattern called an artwork (mask exposure method).
- a method of irradiating actinic rays in an image form by a direct drawing exposure method such as an LDI (Laser Direct Imaging) exposure method or a DLP (Digital Light Processing) exposure method may be employed.
- LDI Laser Direct Imaging
- DLP Digital Light Processing
- a known light source can be used, for example, a carbon arc lamp, a mercury vapor arc lamp, a high-pressure mercury lamp, a xenon lamp, a gas laser such as an argon laser, a solid laser such as a YAG laser, a semiconductor laser, etc. Those that effectively emit ultraviolet light, visible light, and the like are used.
- the wavelength of the actinic ray is preferably in the range of 350 to 420 nm, more preferably in the range of 390 to 420 nm, from the viewpoint of more reliably obtaining the effects of the present invention.
- a resist pattern made of a cured product of the photosensitive resin composition is formed on the substrate by removing portions other than the predetermined portion of the photosensitive resin composition layer from the substrate.
- the support film is present on the photosensitive resin composition layer, the support film is removed, and then the portion (unexposed portion) other than the predetermined portion (exposed portion) is removed (developed).
- Development methods include wet development and dry development, but wet development is widely used.
- development is performed by a known development method using a developer corresponding to the photosensitive resin composition.
- development methods include dip method, battle method, spray method, brushing, slapping, scrapping, rocking immersion, etc., and high-pressure spray method is most suitable from the viewpoint of improving resolution. Yes. Development can also be performed by combining these two or more methods.
- Examples of the developer include an alkaline aqueous solution, an aqueous developer, and an organic solvent developer.
- An alkaline aqueous solution is safe and stable when used as a developer, and has good operability.
- Examples of the base of the alkaline aqueous solution include alkali hydroxides such as lithium, sodium, or potassium hydroxide; alkali carbonates such as lithium, sodium, potassium, or ammonium carbonate or bicarbonate; potassium phosphate, sodium phosphate, and the like.
- Alkali metal phosphates; alkali metal pyrophosphates such as sodium pyrophosphate and potassium pyrophosphate are used.
- Examples of the alkaline aqueous solution include a dilute solution of 0.1 to 5% by mass sodium carbonate, a dilute solution of 0.1 to 5% by mass potassium carbonate, a dilute solution of 0.1 to 5% by mass sodium hydroxide, and 0.1 to 5%.
- a dilute solution of mass% sodium tetraborate is preferred.
- the pH of the alkaline aqueous solution is preferably in the range of 9 to 11, and the temperature is adjusted according to the alkali developability of the photosensitive resin composition layer.
- a surfactant, an antifoaming agent, a small amount of an organic solvent for promoting development, and the like may be mixed.
- the aqueous developer is, for example, a developer composed of water or an alkaline aqueous solution and one or more organic solvents.
- the base of the alkaline aqueous solution in addition to the substances described above, for example, borax, sodium metasilicate, tetramethylammonium hydroxide, ethanolamine, ethylenediamine, diethylenetriamine, 2-amino-2-hydroxymethyl-1 1,3-propanediol, 1,3-diaminopropanol-2, morpholine.
- the pH of the aqueous developer is preferably as low as possible within a range where development is sufficiently performed, preferably pH 8 to 12, and more preferably pH 9 to 10.
- Organic solvents used in the aqueous developer include acetone, ethyl acetate, alkoxyethanol having an alkoxy group having 1 to 4 carbon atoms, ethyl alcohol, isopropyl alcohol, butyl alcohol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono Butyl ether is mentioned. These are used alone or in combination of two or more.
- the concentration of the organic solvent in the aqueous developer is preferably 2 to 90% by mass, and the temperature can be adjusted according to the alkali developability.
- a small amount of a surfactant, an antifoaming agent or the like can be mixed in the aqueous developer.
- organic solvent developer examples include organic solvents such as 1,1,1-trichloroethane, N-methylpyrrolidone, N, N-dimethylformamide, cyclohexanone, methyl isobutyl ketone, and ⁇ -butyrolactone. It is preferable to add water to these organic solvents in an amount of 1 to 20% by mass in order to prevent ignition.
- organic solvents such as 1,1,1-trichloroethane, N-methylpyrrolidone, N, N-dimethylformamide, cyclohexanone, methyl isobutyl ketone, and ⁇ -butyrolactone. It is preferable to add water to these organic solvents in an amount of 1 to 20% by mass in order to prevent ignition.
- the resist pattern can be further cured by heating at about 60 to 250 ° C. or exposure at about 0.2 to 10 J / cm 2 as necessary.
- a printed wiring board can be manufactured by etching or plating a substrate on which a resist pattern is formed by the above method. Etching or plating of the substrate is performed on the conductor layer of the substrate using the formed resist pattern as a mask.
- Etching solutions used for etching include cupric chloride solution, ferric chloride solution, alkaline etching solution, and hydrogen peroxide etching solution. It is preferable to use an iron solution.
- Plating methods for plating include copper plating such as copper sulfate plating and copper pyrophosphate plating, solder plating such as high-throw solder plating, watt bath (nickel sulfate-nickel chloride) plating, nickel plating such as nickel sulfamate, Gold plating such as hard gold plating and soft gold plating can be used.
- the resist pattern can be peeled off with a stronger alkaline aqueous solution than the alkaline aqueous solution used for development, for example.
- a strong alkaline aqueous solution for example, a 1 to 10% by mass sodium hydroxide aqueous solution and a 1 to 10% by mass potassium hydroxide aqueous solution are used.
- the resist pattern peeling method examples include an immersion method and a spray method, which may be used alone or in combination.
- the printed wiring board on which the resist pattern is formed may be a multilayer printed wiring board, may have a small-diameter through hole, and has a high-density wiring such as a high-density package substrate and silicon chip rewiring. It may be a printed wiring board.
- Binder polymer A polymerizable monomer (monomer) of 150 g of methacrylic acid, 125 g of benzyl methacrylate, 25 g of methyl methacrylate and 200 g of styrene (mass ratio 30/25/5/40), and 9.0 g of azobisisobutyronitrile. The solution obtained by mixing was designated as “Solution a”.
- Solution b A solution obtained by dissolving 1.2 g of azobisisobutyronitrile in 100 g of a mixed solution (mass ratio 3: 2) of 60 g of methyl cellosolve and 40 g of toluene was designated as “Solution b”.
- the solution a was added dropwise to the mixed solution in the flask over 4 hours, and then kept at 80 ° C. for 2 hours with stirring.
- the solution b was added dropwise to the solution in the flask over 10 minutes, and then the solution in the flask was kept at 80 ° C. for 3 hours while stirring. Further, the temperature of the solution in the flask was raised to 90 ° C. over 30 minutes, kept at 90 ° C. for 2 hours, and then cooled to obtain a binder polymer (A-1) solution.
- the nonvolatile content (solid content) of the binder polymer (A-1) was 47.8% by mass, the weight average molecular weight was 30000, and the acid value was 196 mgKOH / g.
- the weight average molecular weight was measured by gel permeation chromatography (GPC) and derived by conversion using a standard polystyrene calibration curve. The GPC conditions are shown below.
- the binder polymer (A-2) was obtained in the same manner as that for obtaining the solution of the binder polymer (A-1) except that the materials shown in Table 1 were used in the mass ratio shown in the same table. ) And (A-3) were obtained.
- (D) Sensitizing dye (D-1): 1-phenyl-3- (4-tert-butylstyryl) -5- (4-tert-butylphenyl) pyrazoline (D-2): 1-phenyl-3- (4-Methoxystyryl) -5- (4-methoxyphenyl) pyrazoline (D-3): 1-phenyl-3- (4-isopropylstyryl) -5- (4-isopropylphenyl) pyrazoline (D-4): 1,3-diphenyl-5- (4-isopropylphenyl) pyrazoline (D-5): 1-phenyl-3- (4-methoxyphenyl) -5- (4-tert-butylphenyl) pyrazoline (D-6) : 1-phenyl-3- (2-thienyl) -5- (4-tert-butylphenyl) pyrazoline (D-7): 1-phenyl-3- (2-thienyl)
- Photosensitive element The photosensitive resin composition solutions of the above Examples and Comparative Examples were uniformly applied onto a polyethylene terephthalate film (trade name “HTF-01” manufactured by Teijin Limited) with a thickness of 16 ⁇ m, respectively, and 70 ° C. and 110 ° C.
- a protective film (manufactured by Tamapoly Co., Ltd., trade name “NF-15”) is laminated on the photosensitive resin composition layer, and a polyethylene terephthalate film (support film), the photosensitive resin composition layer, and the protective film are formed.
- the copper surface of a copper-clad laminate made by Hitachi Chemical Co., Ltd., trade name “MCL-E-67” made of glass epoxy material and copper foil (thickness 35 ⁇ m) formed on both sides thereof is # 600. Polishing was performed using a polishing machine (manufactured by Sankei Co., Ltd.) having an appropriate brush, washed with water, and then dried with an air flow. After heating this copper clad laminate (hereinafter referred to as “substrate”) to 80 ° C., the photosensitive elements according to Examples 1 to 14 and Comparative Examples 1 to 3 were placed on the copper surface of the substrate. Laminated. Lamination was performed under the conditions of a temperature of 120 ° C.
- substrate was obtained.
- a direct-drawing exposure machine (trade name “DE-1AH”, manufactured by Hitachi Via Mechanics Co., Ltd.) with a blue-violet laser diode having a wavelength of 405 nm as a light source, a photo with an energy amount (exposure amount) of 70 mJ / cm 2
- the photosensitive resin composition layer was exposed through a tool and a polyethylene terephthalate film.
- the illuminance was measured using an ultraviolet illuminometer (trade name “UIT-150” manufactured by USHIO INC.) Using a 405 nm probe.
- the polyethylene terephthalate film was peeled from the laminated substrate, the photosensitive resin composition layer was exposed, and a 1% by mass aqueous sodium carbonate solution was sprayed at 30 ° C. for 24 seconds to remove unexposed portions.
- the cured film which consists of hardened
- the sensitivity of the photosensitive resin composition was evaluated by measuring the number of remaining steps of the step tablet obtained as a cured film. The sensitivity is indicated by the number of steps of the step tablet, and the higher the number of steps, the better the sensitivity. The results are shown in Tables 5 and 6.
- the resist shape is trapezoidal or inverted trapezoidal, or when there is a tailing of the resist, there is a tendency that a short circuit or disconnection is likely to occur in a circuit formed by the subsequent etching process or plating process. Therefore, it is desirable that the resist shape is rectangular (rectangular), the resist does not skirt, and there is no development residue. Therefore, “rectangular” was used when the resist shape was good, “bottoming” was observed when tailing was observed in the resist pattern, and “development residue” was observed when development residue was observed.
- FIG. 2 is a schematic cross-sectional view for explaining “bottoming” in the resist pattern.
- bottoming means that the resist pattern 14 after development formed on the surface of the copper foil 13 of the substrate 12 is not a rectangle but a space when the cross-sectional shape of the resist pattern is observed. A shape in which a skirt is drawn on a portion (an unexposed portion).
- FIG. 3 is a schematic cross-sectional view for explaining “development residue” in the resist pattern.
- the “development residue” means that when the cross-sectional shape of the resist pattern is observed, the developed resist pattern 14 is not rectangular and the tailing is remarkable, and the development residue 15 is left in the space portion and the space between the lines is filled. It means a state.
- the photosensitive resin compositions of Examples 1 to 14 all had good sensitivity, resolution, adhesion, resist shape, and release characteristics after curing.
- the comparative example 1 which does not use (meth) acrylic acid benzyl ester for a binder polymer the comparative examples 2 and 3 which do not use the photopolymerizable compound which has one ethylenically unsaturated bond in a molecule
- numerator as a photopolymerizable compound.
- the resolution, adhesion, resist shape, and peeled piece size were inferior.
- the photosensitive resin composition of the present invention is applied as a material for forming a resist pattern for producing a printed wiring board.
- the photosensitive resin composition has good sensitivity, resolution, adhesion, resist shape and release characteristics after curing, the wiring is thinned and densified such as a high-density package substrate. It can also be suitably used for forming a resist pattern for producing a printed wiring board having the above.
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Abstract
Description
本実施形態の感光性樹脂組成物は、(A)バインダーポリマー(以下、「(A)成分」ともいう)、(B)光重合性化合物(以下、「(B)成分」ともいう)、(C)光重合開始剤(以下、「(C)成分」ともいう)及び(D)増感色素(以下、「(D)成分」ともいう)を含有する。
(A)成分であるバインダーポリマーは、(メタ)アクリル酸に基づく構造単位と、(メタ)アクリル酸ベンジルエステル又は(メタ)アクリル酸ベンジルエステル誘導体に基づく構造単位とを有する。このようなバインダーポリマーは、例えば、(メタ)アクリル酸と、(メタ)アクリル酸ベンジルエステル又は(メタ)アクリル酸ベンジルエステル誘導体とをラジカル重合させることにより製造することができる。なお、必要に応じその他の重合性単量体を共重合してもよい。
(B)成分である光重合成化合物は、分子内にエチレン性不飽和結合を1つ有する化合物を含む。解像性、密着性、レジスト形状及び硬化後の剥離特性をバランスよく向上させる観点から、その含有量は、(B)成分全体の全質量100質量部に対して1~30質量部含むことが好ましく、3~25質量部含むことがより好ましく、5~20質量部含むことが更に好ましい。
(C)光重合開始剤としては、使用する露光機の光波長と、(C)光重合開始剤の機能発現に必要な波長とがあうものを選択すれば、従来公知のものを特に制限はなく使用することができる。(C)光重合開始剤として、例えば、ベンゾフェノン、2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)-ブタノン-1,2-メチル-1-[4-(メチルチオ)フェニル]-2-モルフォリノ-プロパノン-1等の芳香族ケトン;アルキルアントラキノン等のキノン類;ベンゾインアルキルエーテル等のベンゾインエーテル化合物;ベンゾイン、アルキルベンゾイン等のベンゾイン化合物;ベンジルジメチルケタール等のベンジル誘導体;2-(o-クロロフェニル)-4,5-ジフェニルイミダゾール二量体、2-(o-フルオロフェニル)-4,5-ジフェニルイミダゾール二量体等の2,4,5-トリアリールイミダゾール二量体;9-フェニルアクリジン、1,7-(9,9’-アクリジニル)ヘプタン等のアクリジン誘導体が挙げられる。これらは単独で、又は2種類以上を組み合わせて使用することができる。
(D)成分である増感色素は、下記一般式(1)で表される化合物を含む。
本実施形態の感光性樹脂組成物は、感度をより向上させる観点から、(E)成分としてアミン系化合物を含有することができる。(E)アミン系化合物としては、ビス[4-(ジメチルアミノ)フェニル]メタン、ビス[4-(ジエチルアミノ)フェニル]メタン、ロイコクリスタルバイオレット等が挙げられる。これらは単独で、又は2種類以上を組み合わせて使用することができる。
本実施形態の感光性樹脂組成物は、必要に応じて、分子内に少なくとも1つのカチオン重合可能な環状エーテル基を有する光重合性化合物(オキセタン化合物等)、カチオン重合開始剤、マラカイトグリーン等の染料、トリブロモフェニルスルホン、ロイコクリスタルバイオレット等の光発色剤、熱発色防止剤、p-トルエンスルホンアミド等の可塑剤、顔料、充填剤、消泡剤、難燃剤、安定剤、密着性付与剤、レベリング剤、剥離促進剤、酸化防止剤、香料、イメージング剤、熱架橋剤を含有してもよい。これらは単独で、又は2種類以上を組み合わせて使用することができる。これらの含有量は、(A)成分及び(B)成分の総量100質量部に対して、それぞれ0.01~20質量部程度とすることが好ましい。
本実施形態の感光性樹脂組成物は、有機溶剤に溶解して、固形分30~60質量%程度の溶液(塗布液)として使用することができる。有機溶剤としては、例えば、メタノール、エタノール、アセトン、メチルエチルケトン、メチルセロソルブ、エチルセロソルブ、トルエン、N,N-ジメチルホルムアミド、プロピレングリコールモノメチルエーテル、又はこれらの混合溶剤が挙げられる。
本発明の感光性エレメント1は、図1に示すように、支持フィルム2と、支持フィルム2上に形成された感光性樹脂組成物層3とを備え、必要により、感光性樹脂組成物層3上に保護フィルム4を更に備えるものである。
本発明の感光性樹脂組成物を用いて、レジストパターンを形成することができる。本実施形態に係るレジストパターンの形成方法は、(i)上記感光性樹脂組成物からなる感光性樹脂組成物層を基板上に積層する積層工程と、(ii)感光性樹脂組成物層の所定部分に活性光線を照射してその所定部分を露光させ、硬化させる露光工程と、(iii)感光性樹脂組成物層の所定部分以外の部分を基板上から除去することにより、基板上に、感光性樹脂組成物の硬化物からなるレジストパターンを形成する現像工程と、を有する。
まず、感光性樹脂組成物からなる感光性樹脂組成物層を基板上に積層する。基板としては、絶縁層と該絶縁層上に形成された導体層とを備えた基板(回路形成用基板)を使用することができる。
次に、基板上の感光性樹脂組成物層の所定部分に活性光線を照射してその所定部分を露光させ、硬化させる。この際、感光性樹脂組成物層上に存在する支持フィルムが活性光線に対して透過性である場合には、支持フィルムを通して活性光線を照射することができるが、支持フィルムが遮光性である場合には、支持フィルムを除去した後に感光性樹脂組成物層に活性光線を照射する。
さらに、感光性樹脂組成物層の所定部分以外の部分を基板上から除去することにより、基板上に感光性樹脂組成物の硬化物からなるレジストパターンを形成する。感光性樹脂組成物層上に支持フィルムが存在している場合には、支持フィルムを除去してから、上記所定部分(露光部分)以外の部分(未露光部分)の除去(現像)を行う。現像方法には、ウェット現像とドライ現像とがあるが、ウェット現像が広く用いられている。
上記方法によりレジストパターンが形成された基板をエッチング又はめっきすることにより、プリント配線板を製造することができる。基板のエッチング又はめっきは、形成されたレジストパターンをマスクとして、基板の導体層等に対して行われる。
(A-1)
重合性単量体(モノマー)であるメタクリル酸150g、メタクリル酸ベンジル125g、メタクリル酸メチル25g及びスチレン200g(質量比30/25/5/40)と、アゾビスイソブチロニトリル9.0gとを混合して得た溶液を「溶液a」とした。
ポンプ:日立 L-6000型(株式会社日立製作所製)
カラム:以下の計3本
Gelpack GL-R420
Gelpack GL-R430
Gelpack GL-R440(以上、日立化成工業株式会社製、商品名)
溶離液:テトラヒドロフラン
測定温度:40℃
流量:2.05mL/分
検出器:日立 L-3300型RI(株式会社日立製作所製、商品名)
重合性単量体(モノマー)として、表1に示す材料を同表に示す質量比で用いた他は、バインダーポリマー(A-1)の溶液を得るのと同様にしてバインダーポリマー(A-2)及び(A-3)の溶液を得た。
以下の表2及び3に示す成分を、同表に示す配合量で混合することにより、実施例1~13及び比較例1~3の感光性樹脂組成物の溶液を調製した。なお、表2及び3に示す(A)成分の配合量は、不揮発分の質量(固形分量)である。
(B)光重合性化合物
TMPT21(日立化成工業株式会社製、商品名):EO変性トリメチロールプロパントリアクリレート(一般式(1)において、R1=R2=R3=メチル基、a+b+c=21(平均値)である化合物)
FA-321M(日立化成工業株式会社製、商品名):2,2-ビス(4-(メタクリロキシペンタエトキシ)フェニル)プロパン
FA-024M(日立化成工業株式会社製、商品名):一般式(6)において、R=メチル基、m3=6(平均値)、n2+n3=12(平均値)である化合物
M-114(東亞合成株式会社製、商品名):4-ノルマルノニルフェノキシオクタエチレングリコールアクリレート
BPE-100(新中村化学工業株式会社製、商品名):EO変性ビスフェノールA系ジメタクリレート(オキシエチレン基の繰り返し総数が2.6)
FA-MECH(日立化成工業株式会社製、商品名):(2-ヒドロキシ-3-クロロ)プロピル-2-メタクリロイルオキシエチルフタレート
B-CIM(Hampford社製、商品名):2,2’-ビス(2-クロロフェニル)-4,4’,5,5’-テトラフェニルビスイミダゾール
(D-1):1-フェニル-3-(4-tert-ブチルスチリル)-5-(4-tert-ブチルフェニル)ピラゾリン
(D-2):1-フェニル-3-(4-メトキシスチリル)-5-(4-メトキシフェニル)ピラゾリン
(D-3):1-フェニル-3-(4-イソプロピルスチリル)-5-(4-イソプロピルフェニル)ピラゾリン
(D-4):1,3-ジフェニル-5-(4-イソプロピルフェニル)ピラゾリン
(D-5):1-フェニル-3-(4-メトキシフェニル)-5-(4-tert-ブチルフェニル)ピラゾリン
(D-6):1-フェニル-3-(2-チエニル)-5-(4-tert-ブチルフェニル)ピラゾリン
(D-7):1-フェニル-3-(2-チエニル)エテニル-5-(2-チエニル)ピラゾリン
(D-8):1-フェニル-3-(2-チエニル)-5-(2-チエニル)ピラゾリン
(D-9):1-フェニル-3-(2-チエニル)-5-スチリルピラゾリン(以上、株式会社日本化学工業所製)
LCV(山田化学株式会社製、商品名):ロイコクリスタルバイオレット
MKG(大阪有機化学工業株式会社製、商品名):マラカイトグリーン
上記実施例及び比較例の感光性樹脂組成物の溶液を、それぞれ厚さ16μmのポリエチレンテレフタレートフィルム(帝人株式会社製、商品名「HTF-01」)上に均一に塗布し、70℃及び110℃の熱風対流式乾燥器で乾燥して、乾燥後の膜厚が25μmである感光性樹脂組成物層を形成した。この感光性樹脂組成物層上に保護フィルム(タマポリ株式会社製、商品名「NF-15」)を貼り合わせ、ポリエチレンテレフタレートフィルム(支持フィルム)と、感光性樹脂組成物層と、保護フィルムとが順に積層された感光性エレメントを得た。
ガラスエポキシ材と、その両面に形成された銅箔(厚さ35μm)とからなる銅張積層板(日立化成工業株式会社製、商品名「MCL-E-67」)の銅表面を、#600相当のブラシを持つ研磨機(株式会社三啓製)を用いて研磨し、水洗後、空気流で乾燥させた。この銅張積層板(以下、「基板」という。)を加熱して80℃に昇温させた後、実施例1~14及び比較例1~3に係る感光性エレメントを、基板の銅表面にラミネート(積層)した。ラミネートは、保護フィルムを除去しながら、各感光性エレメントの感光性樹脂組成物層が基板の銅表面に密着するようにして、温度120℃、ラミネート圧力4kgf/cm2の条件下で行った。このようにして、基板の銅表面上に感光性樹脂組成物層及びポリエチレンテレフタレートフィルムが積層された積層基板を得た。
得られた積層基板を放冷し、23℃になった時点で、積層基板のポリエチレンテレフタレートフィルム上に、濃度領域0.00~2.00、濃度ステップ0.05、タブレットの大きさ20mm×187mm、各ステップの大きさが3mm×12mmである41段ステップタブレットを有するフォトツールを密着させた。波長405nmの青紫色レーザダイオードを光源とする直描露光機(日立ビアメカニクス株式会社製、商品名「DE-1AH」、)を使用して、70mJ/cm2のエネルギー量(露光量)でフォトツール及びポリエチレンテレフタレートフィルムを介して感光性樹脂組成物層に対して露光を行った。なお、照度の測定は、405nm対応プローブを適用した紫外線照度計(ウシオ電機株式会社製、商品名「UIT-150」)を用いて行った。
ライン幅(L)/スペース幅(S)(以下、「L/S」と記す。)が5/5~30/30(単位:μm)である描画パターンを用いて、41段ステップタブレットの残存段数が11段となるエネルギー量で前記積層基板の感光性樹脂組成物層に対して露光(描画)を行った。露光後、前記感度の評価と同様の現像処理を行った。
上記解像性・密着性の評価において、得られたレジスト形状(レジストパターンの断面形状)を日立走査型電子顕微鏡S-500Aを用いて観察した。結果を表5及び6に示す。
各感光性エレメントを前記銅張積層板(基板)上に積層し、表4に示す条件で露光及び現像を行うことにより、基板上に硬化膜が形成された試験片(40mm×50mm)を作製した。この試験片を室温(25℃)で一昼夜放置した後、表4に示す条件で剥離を行った。撹拌開始から、硬化膜が基板から完全に剥離除去されるまでの時間を剥離時間とした。また、剥離後の剥離片のサイズを目視にて観察し、以下の基準で評価した。剥離時間が短く、剥離片サイズが小さいほど剥離特性が良好であることを意味する。なお、剥離片サイズがシート状の場合を「L」、30-40mm角の場合を「M」、30mm角より小さい場合を「S」と表記する。結果を表5及び6に示す。
Claims (14)
- (A)バインダーポリマー、(B)光重合性化合物、(C)光重合開始剤及び(D)増感色素を含有する感光性樹脂組成物であって、
前記(A)バインダーポリマーが、(メタ)アクリル酸に基づく構造単位と、(メタ)アクリル酸ベンジルエステル又は(メタ)アクリル酸ベンジルエステル誘導体に基づく構造単位とを有し、
前記(B)光重合性化合物が、エチレン性不飽和結合を1つ有する化合物を含み、
前記(D)増感色素が、下記一般式(1)で表される化合物を含む、感光性樹脂組成物。
[式(1)中、R1及びR2は、それぞれ独立に置換若しくは無置換のフェニル基、チエニル基又はフリル基を示し、R3は炭素数1~10のアルキル基、炭素数1~10のアルコキシ基又は炭素数1~10のアルキルエステル基を示し、a及びbはそれぞれ独立に0~2の整数を示し、mは0~5の整数を示し、mが2~5の場合、複数存在するR3は互いに同一でも異なっていてもよい。] - 前記(B)光重合性化合物が、下記一般式(2)又は下記一般式(3)でそれぞれ表される化合物を含む、請求項1に記載の感光性樹脂組成物。
[式(2)中、R4は水素原子又はメチル基を示し、R5は水素原子、メチル基又はハロゲン化メチル基を示し、R6は炭素数1~6のアルキル基、炭素数1~6のアルコキシ基、水酸基又はハロゲン原子を示し、pは1~4の整数を示し、nは0~4の整数を示し、nが2~4の場合、複数存在するR6は同一でも異なっていてもよい。]
[式(3)中、R7は水素原子又はメチル基を示し、R8は炭素数1~12のアルキル基、炭素数1~12のアルコキシ基、水酸基又はハロゲン原子を示し、rは1~12の整数を示し、kは0~5の整数を示し、kが2~5の場合、複数存在するR8は同一でも異なっていてもよい。] - 前記(B)光重合性化合物が、ビスフェノールA系ジ(メタ)アクリレート化合物を更に含む、請求項1又は2に記載の感光性樹脂組成物。
- 前記(B)光重合性化合物が、(ポリ)オキシエチレン鎖又は(ポリ)オキシプロピレン鎖を有するトリメチロールプロパントリ(メタ)アクリレート化合物を更に含む、請求項1~3のいずれか一項に記載の感光性樹脂組成物。
- 前記(B)光重合性化合物が、(ポリ)オキシエチレン鎖及び(ポリ)オキシプロピレン鎖を有するポリアルキレングリコールジ(メタ)アクリレートを更に含む、請求項1~4のいずれか一項に記載の感光性樹脂組成物。
- 前記(A)バインダーポリマーが、(メタ)アクリル酸アルキルエステルに基づく構造単位を更に有する、請求項1~5のいずれか一項に記載の感光性樹脂組成物。
- 前記(A)バインダーポリマーが、スチレン又はスチレン誘導体に基づく構造単位を更に有する、請求項1~6のいずれか一項に記載の感光性樹脂組成物。
- 前記(A)バインダーポリマーの酸価が、100~250mgKOH/gである、請求項1~7のいずれか一項に記載の感光性樹脂組成物。
- 前記(A)バインダーポリマーの重量平均分子量が、10000~100000である、請求項1~8のいずれか一項に記載の感光性樹脂組成物。
- (E)アミン系化合物を更に含有する、請求項1~9のいずれか一項に記載の感光性樹脂組成物。
- 支持フィルムと、該支持フィルム上に形成された請求項1~10のいずれか一項に記載の感光性樹脂組成物からなる感光性樹脂組成物層と、を備える感光性エレメント。
- 請求項1~10のいずれか一項に記載の感光性樹脂組成物からなる感光性樹脂組成物層を基板上に積層する積層工程と、
前記感光性樹脂組成物層の所定部分に活性光線を照射して前記所定部分を露光させ、硬化させる露光工程と、
前記感光性樹脂組成物層の前記所定部分以外の部分を前記基板上から除去することにより、前記基板上に、感光性樹脂組成物の硬化物からなるレジストパターンを形成する現像工程と、
を有するレジストパターンの形成方法。 - 前記活性光線の波長が390~420nmの範囲内である、請求項12に記載のレジストパターンの形成方法。
- 請求項12又は13に記載の方法によりレジストパターンが形成された基板をエッチング又はめっきする工程を含む、プリント配線板の製造方法。
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| CN2010800075741A CN102317864A (zh) | 2009-02-26 | 2010-02-03 | 感光性树脂组合物、以及使用了该组合物的感光性元件、抗蚀剂图案的形成方法和印刷线路板的制造方法 |
| KR1020117018231A KR101339530B1 (ko) | 2009-02-26 | 2010-02-03 | 감광성 수지 조성물, 및 이것을 이용한 감광성 엘리먼트, 레지스트 패턴의 형성 방법 및 프린트 배선판의 제조 방법 |
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| KR20180125965A (ko) | 2016-03-17 | 2018-11-26 | 히타치가세이가부시끼가이샤 | 감광성 수지 조성물, 감광성 엘리먼트, 레지스터 패턴 부착 기판의 제조 방법, 및 프린트 배선판의 제조 방법 |
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| WO2025215193A1 (en) * | 2024-04-10 | 2025-10-16 | Arkema France | Acidic oligomers used in deinking process |
Also Published As
| Publication number | Publication date |
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| CN103543608A (zh) | 2014-01-29 |
| CN102317864A (zh) | 2012-01-11 |
| KR101339530B1 (ko) | 2013-12-10 |
| JP5327310B2 (ja) | 2013-10-30 |
| TWI479261B (zh) | 2015-04-01 |
| JPWO2010098183A1 (ja) | 2012-08-30 |
| CN104808444A (zh) | 2015-07-29 |
| TW201042389A (en) | 2010-12-01 |
| KR20110106912A (ko) | 2011-09-29 |
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