WO2020261523A1 - 転写型感光性フィルム、樹脂硬化膜の形成方法及び樹脂硬化膜付基板の製造方法 - Google Patents
転写型感光性フィルム、樹脂硬化膜の形成方法及び樹脂硬化膜付基板の製造方法 Download PDFInfo
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- WO2020261523A1 WO2020261523A1 PCT/JP2019/025750 JP2019025750W WO2020261523A1 WO 2020261523 A1 WO2020261523 A1 WO 2020261523A1 JP 2019025750 W JP2019025750 W JP 2019025750W WO 2020261523 A1 WO2020261523 A1 WO 2020261523A1
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- 238000004132 cross linking Methods 0.000 description 1
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- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- 238000007607 die coating method Methods 0.000 description 1
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 230000000447 dimerizing effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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- 238000004090 dissolution Methods 0.000 description 1
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- 235000019256 formaldehyde Nutrition 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
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- 238000007756 gravure coating Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
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- 229920002401 polyacrylamide Polymers 0.000 description 1
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- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229940048084 pyrophosphate Drugs 0.000 description 1
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
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- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 1
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 150000003536 tetrazoles Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- 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
-
- 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
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
Definitions
- the present invention relates to a transfer type photosensitive film, a method for forming a resin cured film, and a method for manufacturing a substrate with a resin cured film.
- a capacitance type touch sensor board As a sensor board used for an image display device such as a touch panel, a capacitance type touch sensor board is known.
- a transparent electrode such as ITO and wiring such as copper or copper / nickel alloy are provided on the touch sensor substrate, and a protective film may be provided to protect these electrodes and wiring. In this case, it is necessary to form the protective film with a material having excellent light transmission so as not to affect the image quality.
- Patent Document 1 discloses a comb-shaped electrode pattern for collecting fine particles in a liquid sample such as a microorganism by a dielectrophoresis method.
- a dielectric film for electrical insulation from the liquid sample may be provided on this electrode pattern.
- a transfer type photosensitive film having a photosensitive resin layer containing a binder polymer, a photopolymerizable compound and a photopolymerization initiator is known.
- a resin cured film having a predetermined pattern shape can be easily formed by laminating a photosensitive resin layer on a substrate and performing exposure and development.
- a protective film or a dielectric film is provided on the above-mentioned touch sensor substrate or biosensor substrate, it is required to make the film thinner from the viewpoint of improving sensitivity.
- the thickness of the photosensitive resin layer is reduced, there is a problem that voids (air bubbles) are likely to be generated during laminating.
- a sensor such as a touch panel or a microorganism measuring device is provided with a delicate pattern, and voids are likely to remain in the recesses thereof.
- the present invention provides a transfer-type photosensitive film capable of satisfactorily forming a thin resin-cured film while sufficiently suppressing the generation of voids even on a substrate having a step, a method for forming a resin-cured film, and resin curing. It is an object of the present invention to provide a method for manufacturing a substrate with a film.
- the present inventors have made a thin film by providing an intermediate layer containing a water-soluble polymer and having a predetermined thickness between the support film and the photosensitive resin layer. It has been found that even when the photosensitive resin layer is laminated on a base material having a step, the generation of voids can be sufficiently suppressed without significantly impairing the developability and the resolvability. Furthermore, the present inventors can reduce the number of large particles present in the intermediate layer by adjusting the dissolution conditions of the water-soluble polymer when forming the intermediate layer containing the water-soluble polymer, thereby increasing the number of large particles. We also found that the problems caused by particles can be solved. Then, based on these findings, the present invention has been completed.
- the present invention has a structure in which a support film, an intermediate layer containing a water-soluble polymer, and a photosensitive resin layer are laminated in this order, the thickness of the photosensitive resin layer is 2 ⁇ m or less, and the intermediate layer.
- a transfer-type photosensitive film having a thickness of 5 to 20 ⁇ m and having a particle size of more than 0.5 times the thickness of the intermediate layer and having a particle size of 50 particles / m 2 or less. provide.
- the transfer type photosensitive film of the present invention by having an intermediate layer containing a water-soluble polymer and having a predetermined thickness between the support film and the photosensitive resin layer, the transfer type can be obtained at the time of lamination.
- the ability of the photosensitive resin layer to follow the step is improved, and after laminating, the intermediate layer can be removed by development to leave only the thin resin cured film.
- the influence on the photosensitive resin layer for example, the dent of the photosensitive layer and the photosensitive resin of the particle portion).
- the content of particles existing in the intermediate layer and having a particle size of 5 ⁇ m or more is preferably 60 particles / m 2 or less.
- the intermediate layer may contain 45% by mass or more of polyvinyl alcohol from the viewpoint of improving the followability at the time of laminating.
- the thickness of the intermediate layer is preferably 5 to 15 ⁇ m.
- the transfer-type photosensitive film of the present invention may be used to form a protective film on a biosensor substrate.
- the transfer-type photosensitive film of the present invention may be used to form a protective film on the dielectrophoretic electrode of the biosensor substrate having the dielectrophoretic electrode.
- the present invention also includes a step of laminating the transfer-type photosensitive film according to the present invention on a base material having a step on one main surface so that a photosensitive resin layer covers the step, and a step on the base material.
- a photosensitive resin layer covers the step
- a step on the base material By irradiating a predetermined portion of the photosensitive resin layer with light and bringing the developing solution into contact with the photosensitive resin layer and the intermediate layer from the intermediate layer side in a state where the support film is removed, the photosensitive resin layer is predetermined.
- a method for forming a resin-cured film which comprises a step of removing a portion other than a portion and an intermediate layer and forming a resin-cured film covering a step.
- a thin resin cured film can be formed on a base material having a step while sufficiently suppressing the generation of voids.
- the transfer type photosensitive film is provided with a protective film on the side opposite to the intermediate layer of the photosensitive resin layer, it is possible to prevent the photosensitive resin layer from peeling off together with the protective film when the protective film is peeled off, and to protect the film.
- the film is wound without a film, it is possible to prevent the photosensitive resin layer from peeling off to the adjacent support film side when the transfer type photosensitive film is pulled out.
- the step may be a step caused by a transparent electrode and / or wiring provided on the main surface of the base material.
- the step may be a step caused by a dielectrophoretic electrode provided on the main surface of the base material.
- the present invention also provides a transfer-type photosensitive film according to the present invention on a substrate having a transparent electrode and / or wiring on one main surface, so that a photosensitive resin layer covers the transparent electrode and / or wiring.
- First production of a substrate with a resin-cured film which comprises a step of removing a portion other than a predetermined portion of the photosensitive resin layer and an intermediate layer and forming a resin-cured film covering a transparent electrode and / or wiring by contacting the resin.
- a protective film for transparent electrodes and / or wiring it is possible to obtain a substrate having a resin cured film which is a thin film but has sufficiently few voids.
- This substrate can be suitably used as a touch sensor.
- the present invention also includes a step of laminating the transfer-type photosensitive film according to the present invention on a substrate having a dielectricing electrode on one main surface so that a photosensitive resin layer covers the dielectricing electrode, and a substrate.
- a step of laminating the transfer-type photosensitive film according to the present invention on a substrate having a dielectricing electrode on one main surface so that a photosensitive resin layer covers the dielectricing electrode, and a substrate.
- the dielectric film of the dielectrophoresis electrode it is possible to obtain a substrate having a resin cured film which is a thin film but has sufficiently few voids.
- This substrate can be suitably used as a biosensor.
- a transfer type photosensitive film capable of forming a thin resin cured film while sufficiently suppressing the generation of voids even on a substrate having a step, a method for forming a resin cured film, and resin curing.
- a method for manufacturing a substrate with a film can be provided.
- (meth) acrylic acid means acrylic acid or methacrylic acid
- (meth) acrylate means acrylate or the corresponding methacrylate.
- a or B may include either A or B, or both.
- the term “layer” includes not only the structure of the shape formed on the entire surface but also the structure of the shape formed in a part when observed as a plan view.
- the term “process” is used not only as an independent process but also as a term as long as the desired action of the process is achieved even when it cannot be clearly distinguished from other processes. included.
- the numerical range indicated by using "-” indicates a range including the numerical values before and after "-" as the minimum value and the maximum value, respectively.
- each component in the composition is the sum of the plurality of substances present in the composition unless otherwise specified, when a plurality of substances corresponding to each component are present in the composition. Means quantity. Further, the exemplary materials may be used alone or in combination of two or more unless otherwise specified.
- the upper limit value or the lower limit value of the numerical range of one step may be replaced with the upper limit value or the lower limit value of the numerical range of another step.
- the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.
- FIG. 1 is a schematic cross-sectional view of the transfer type photosensitive film according to the present embodiment.
- the transfer-type photosensitive film 10 of the present embodiment has a structure in which the support film 1, the intermediate layer 2, the photosensitive resin layer 3, and the protective film 4 are laminated in this order.
- the transfer-type photosensitive film of the present embodiment may be one in which the protective film 4 is omitted and wound. In this case, the photosensitive resin layer is protected by adjoining the support film of the inner transfer-type photosensitive film to the photosensitive resin layer of the outer transfer-type photosensitive film.
- a polymer film can be used as the support film 1.
- Examples of the material of the polymer film include polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyether sulfone, cycloolefin polymer and the like.
- the thickness of the support film 1 is preferably 5 to 100 ⁇ m, preferably 10 to 70 ⁇ m, from the viewpoint of ensuring the covering property and suppressing a decrease in resolution when irradiating light (active light) through the support film 1. It is more preferably 15 to 40 ⁇ m, and particularly preferably 15 to 35 ⁇ m.
- the intermediate layer 2 can contain a water-soluble polymer.
- the water-soluble polymer include polyvinyl alcohol, polyvinyl ether-maleic anhydride water-soluble salts, carboxyalkyl starch water-soluble salts, polyacrylamide, polyamide, polyacrylic acid water-soluble salts, gelatin, polypropylene glycol, polyvinylpyrrolidone and the like. ..
- the intermediate layer preferably contains polyvinyl alcohol in an amount of 45% by mass or more, more preferably 50% by mass or more, further preferably 60% by mass or more, 65. It is even more preferably contained in an amount of mass% or more.
- the content of polyvinyl alcohol in the intermediate layer is preferably 70% by mass or less, and more preferably 68% by mass or less.
- the content of polyvinyl alcohol in the intermediate layer may be 45 to 80 parts by mass or 50 to 70 parts by mass with respect to 100 parts by mass of the total amount of the water-soluble polymer.
- the saponification degree of polyvinyl alcohol is preferably 80 mol% or more, more preferably 83 mol% or more, still more preferably 85 mol% or more. From the viewpoint of developability, the saponification degree of polyvinyl alcohol is preferably 95 mol% or less, more preferably 93 mol% or less, still more preferably 90 mol% or less.
- the intermediate layer preferably contains polyvinylpyrrolidone from the viewpoint of ensuring adhesion with the photosensitive resin layer.
- the content of polyvinylpyrrolidone in the intermediate layer is preferably 20 to 50 parts by mass, preferably 30 to 40 parts by mass, based on 100 parts by mass of the total amount of the water-soluble polymer, from the viewpoint of ensuring adhesion to the photosensitive resin layer. More preferable. Further, from the viewpoint of further reducing the number of particles in the intermediate layer while ensuring the adhesion to the photosensitive resin layer, the content of polyvinylpyrrolidone in the intermediate layer is 25 with respect to 100 parts by mass of the total amount of the water-soluble polymer. It is preferably up to 40 parts by mass, more preferably 30 to 35 parts by mass.
- the intermediate layer preferably contains polyvinyl alcohol and polyvinylpyrrolidone.
- the mass ratio (PVA / PVP) of polyvinyl alcohol to polyvinylpyrrolidone is preferably 80/20 to 50/50, more preferably 70/30 to 60/40.
- the intermediate layer may contain additives such as a leveling agent, a mold release agent, and an adhesion imparting agent.
- the thickness of the intermediate layer is preferably 5 to 20 ⁇ m from the viewpoint of achieving both developability and void suppressing effect at a high level, and 5 to 15 ⁇ m from the viewpoint of developability and resolution. preferable.
- the content of particles existing in the intermediate layer and having a particle size exceeding 0.5 times the thickness of the intermediate layer is preferably 50 particles / m 2 or less. , 30 pieces / m 2 or less, and even more preferably 0 pieces / m 2 .
- the foreign matter part of the intermediate layer is marked by visual inspection, and the foreign matter is particles or other things (for example, dents, filamentous foreign matter) by microscopic observation of the marking part. , Bubbles, etc.) and can be counted by measuring the size of the particles when viewed from above.
- the outer edge of the particle can be confirmed as light and dark in color by microscopic observation.
- the transfer-type photosensitive film of the present embodiment preferably has a particle content of 60 particles / m 2 or less, which is present in the intermediate layer and has a particle size of 5 ⁇ m or more. It is more preferably 50 pieces / m 2 or less, further preferably 40 pieces / m 2 or less, further preferably 30 pieces / m 2 or less, and 20 pieces / m 2 or less. Especially preferable.
- the particles are considered to be an undissolved substance of a water-soluble polymer, for example, when preparing a coating liquid for forming an intermediate layer, the water solubility is high.
- Controlling the conditions under which the molecule is dissolved in the solvent can be mentioned. Specifically, it is preferable to dissolve in a closed system (for example, pressurize to 0.1 MPa or more) rather than an open system.
- the temperature at the time of melting is preferably 60 ° C. or higher, and more preferably 90 ° C. or higher.
- the upper limit of the temperature is preferably 150 ° C. or lower, more preferably 120 ° C. or lower, from the viewpoint of suppressing decomposition of the water-soluble polymer.
- the photosensitive resin layer 3 includes a binder polymer (hereinafter, also referred to as (A) component), a photopolymerizable compound (hereinafter, also referred to as (B) component), and a photopolymerization initiator (hereinafter, also referred to as (C) component). ), And can be formed from a photosensitive resin composition containing.
- A binder polymer
- B photopolymerizable compound
- C photopolymerization initiator
- the component (A) is preferably a copolymer containing a structural unit derived from (a1) (meth) acrylic acid and a structural unit derived from (a2) (meth) acrylic acid alkyl ester.
- the alkyl of the alkyl ester referred to here also includes an alkyl group having a substituent and a cycloalkyl group.
- the content ratio of the structural unit derived from (a1) (meth) acrylic acid in the component (A) is based on the total mass of the monomers constituting the component (A) from the viewpoint of excellent rust prevention.
- the blending amount of the above is preferably 30% by mass or less, more preferably 25% by mass or less, and further preferably 20% by mass or less.
- Examples of the (a2) (meth) acrylic acid alkyl ester include (meth) acrylic acid methyl ester, (meth) acrylic acid ethyl ester, (meth) acrylic acid butyl ester, (meth) acrylic acid 2-ethylhexyl ester, and ( Included are cyclohexyl (meth) acrylate, cyclopentanyl (meth) acrylate, dicyclopentanyl (meth) acrylate and hydroxylethyl (meth) acrylate.
- the content ratio of the structural unit derived from the (a2) (meth) acrylic acid alkyl ester in the component (A) is the blending amount of the (meth) acrylic acid alkyl ester based on the total mass of the monomers constituting the component (A). , 90% by mass or less, more preferably 89% by mass or less, and further preferably 88% by mass or less. Further, the blending amount of the (meth) acrylic acid alkyl ester based on the total mass of the monomers constituting the component (A) is preferably 20% by mass or more.
- the component (A) preferably has a group containing an alicyclic structure in the side chain.
- a group can be introduced by a monomer containing a group having an alicyclic structure in the side chain.
- a monomer for example, cyclohexyl (meth) acrylate, cyclopentanyl (meth) acrylate, and dicyclopentanyl (meth) acrylate exemplified as the component (a2) can be used.
- the blending amount of the monomer containing a group having an alicyclic structure in the side chain is preferably 5 to 70% by mass, preferably 20 to 60% by mass, based on the total mass of the monomers constituting the component (A). More preferably, it is more preferably 30 to 50% by mass.
- the copolymer may further contain a structural unit derived from another monomer capable of copolymerizing with the component (a1) and / or the component (a2).
- Examples of other monomers that can be copolymerized with the above component (a1) and / or the component (a2) include (meth) acrylic acid tetrahydrofurfuryl ester, (meth) acrylic acid dimethylaminoethyl ester, and (meth) acrylic acid.
- Acid diethylaminoethyl ester (meth) acrylic acid glycidyl ester, (meth) acrylic acid benzyl ester, 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3-tetrafluoropropyl (meth) acrylate , (Meta) acrylamide, (meth) acrylonitrile, diacetone (meth) acrylamide, styrene, and vinyl toluene.
- A When synthesizing the binder polymer, one type of the above-mentioned monomer may be used alone, or two or more types may be used in combination.
- the weight average molecular weight of the binder polymer (A) is preferably 10,000 to 200,000, more preferably 15,000 to 150,000, and 30,000 to 150,000 from the viewpoint of resolution. It is more preferably 30,000 to 100,000, particularly preferably 40,000 to 100,000.
- the measurement conditions for the weight average molecular weight are the same as those in the examples of the present specification.
- the acid value of the binder polymer (A) is preferably 75 to 200 mgKOH / g, more preferably 75 to 150 mgKOH / g, and 75 to 120 mgKOH / g in terms of excellent patterning property. Is even more preferable.
- the acid value of the binder polymer as the component (A) can be measured in the same manner as in the examples of the present specification.
- the glass transition temperature (Tg) of the binder polymer as the component (A) is preferably 60 to 200 ° C., more preferably 80 to 200 ° C., and 100 to 200 ° C. from the viewpoint of ensuring reliability. Is more preferable.
- the glass transition temperature of the binder polymer which is the component (A) can be measured in the same manner as in the examples of the present specification.
- a photopolymerizable compound having an ethylenically unsaturated group can be used as the photopolymerizable compound as the component (B).
- Examples of the photopolymerizable compound having an ethylenically unsaturated group include a monofunctional vinyl monomer, a bifunctional vinyl monomer, and a polyfunctional vinyl monomer having at least three polymerizable ethylenically unsaturated groups.
- Examples of the monofunctional vinyl monomer include (meth) acrylic acid, (meth) acrylic acid alkyl ester exemplified in the description of the component (A) above, and a monomer copolymerizable with them.
- bifunctional vinyl monomer examples include polyethylene glycol di (meth) acrylate, trimethyl propandi (meth) acrylate, polypropylene glycol di (meth) acrylate, and bisphenol A polyoxyethylene polyoxypropylene di (meth) acrylate (2).
- the photosensitive resin composition of the present embodiment preferably contains a compound having a tricyclodecane skeleton or a tricyclodecene skeleton.
- a compound having a tricyclodecane skeleton or a tricyclodecene skeleton examples include a di (meth) acrylate compound represented by the following general formula (B-1).
- R 6 and R 7 each independently represent a hydrogen atom or a methyl group
- X represents a divalent group having a tricyclodecane skeleton or a tricyclodecane skeleton
- R 8 and R 9 each independently represent an alkylene group having 1 to 4 carbon atoms
- n and m each independently represent an integer of 0 to 2
- p and q each independently represent an integer of 0 or more.
- P + q 0 to 10.
- R 8 and R 9 are preferably an ethylene group or a propylene group, and more preferably an ethylene group.
- the propylene group may be either an n-propylene group or an isopropylene group.
- the divalent group having a tricyclodecane skeleton or a tricyclodecene skeleton contained in X has a bulky structure, so that the cured film is low. Moisture permeability can be improved.
- the "tricyclodecane skeleton" and the “tricyclodecene skeleton" in the present specification refer to the following structures (each having an arbitrary joint).
- Examples of the compound having a tricyclodecane skeleton or a tricyclodecene skeleton include tricyclodecanedimethanol di (meth) acrylate from the viewpoint of low moisture permeability of the obtained cured film pattern and improvement of adhesion to a conductor containing ITO.
- Compounds having a tricyclodecane skeleton are preferred. These are available as DCP and A-DCP (both manufactured by Shin Nakamura Chemical Industry Co., Ltd.).
- the proportion of the compound having a tricyclodecane skeleton or a tricyclodecene skeleton in the component (B) is 100 parts by mass of the total amount of the photopolymerizable compounds contained in the photosensitive resin composition from the viewpoint of improving reliability. It is preferably 25 parts by mass or more, more preferably 50 parts by mass or more, further preferably 70 parts by mass or more, and even more preferably 80 parts by mass or more. From the viewpoint of improving reliability, it is preferable that the component (B) contains a compound having a tricyclodecane skeleton or a tricyclodecene skeleton in an amount of 25 to 100% by mass based on the total amount of the component (B).
- Examples of the polyfunctional vinyl monomer having at least three polymerizable ethylenically unsaturated groups include trimethylolpropane tri (meth) acrylate, tetramethylolmethanetri (meth) acrylate, and tetramethylolmethanetetra (meth) acrylate.
- Polyhydric alcohols such as pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dimethylolpropane tetraacrylate and ⁇ , ⁇ -unsaturated carboxylic acids (eg, acrylic acid) , Metaacrylic acid, etc.); Trimethylolpropane Triglycidyl ether A compound obtained by addition reaction of a glycidyl group-containing compound such as tri (meth) acrylate with ⁇ , ⁇ -unsaturated carboxylic acid. Examples thereof include compounds obtained by adding diglycerin such as diglycerin (meth) acrylate and ⁇ , ⁇ -unsaturated carboxylic acid.
- diglycerin such as diglycerin (meth) acrylate and ⁇ , ⁇ -unsaturated carboxylic acid.
- the photosensitive resin composition of the present embodiment preferably contains a polyfunctional vinyl monomer having at least three polymerizable ethylenically unsaturated groups from the viewpoint of ensuring reliability by improving the crosslink density. Further, from the viewpoint of ensuring reliability by improving the cross-linking density, it has a (meth) acrylate compound having a skeleton derived from pentaerythritol, a (meth) acrylate compound having a skeleton derived from dipentaerythritol, and a skeleton derived from trimethylolpropane ( It is preferable to contain at least one selected from the meta) acrylate compound, and at least one selected from the (meth) acrylate compound having a skeleton derived from dipentaerythritol and the (meth) acrylate compound having a skeleton derived from trimethylolpropane. More preferably, it contains seeds.
- the (meth) acrylate having a skeleton derived from dipentaerythritol means an esterified product of dipentaerythritol and (meth) acrylic acid, and the esterified product is a compound modified with an alkyleneoxy group. Is also included.
- the above esterified product preferably has 6 ester bonds in one molecule, but a compound having 1 to 5 ester bonds may be mixed.
- the (meth) acrylate compound having a skeleton derived from trimethylolpropane means an esterified product of trimethylolpropane and (meth) acrylic acid, and the esterified product is a compound modified with an alkyleneoxy group. Is also included.
- the above esterified product preferably has 3 ester bonds in one molecule, but a compound having 1 to 2 ester bonds may be mixed.
- a compound obtained by dimerizing the trimethylolpropane di (meth) acrylate compound may be used as the (meth) acrylate compound having a skeleton derived from trimethylolpropane.
- the above compounds can be used alone or in combination of two or more.
- the proportion of the monomer having at least three polymerizable ethylenically unsaturated groups in the component (B) is the total of the photopolymerizable compounds contained in the photosensitive resin composition from the viewpoint of ensuring reliability by improving the crosslink density.
- the amount of 100 parts by mass it is preferably 10 parts by mass or more, more preferably 30 parts by mass or more, and further preferably 50 parts by mass or more.
- the contents of the component (A) and the component (B) in the photosensitive resin composition of the present embodiment are 35 to 35 parts by mass of the total amount of the component (A) and the component (B), respectively. It is preferably 85 parts by mass, the component (B) is preferably 15 to 65 parts by mass, the component (A) is more preferably 40 to 80 parts by mass, and the component (B) is 20 to 60 parts by mass, more preferably (A). ) Component is 50 to 70 parts by mass, (B) component is 30 to 50 parts by mass, (A) component is 55 to 65 parts by mass, and (B) component is 35 to 45 parts by mass. Is particularly preferable.
- the contents of the components (A) and (B) are (A) with respect to 100 parts by mass of the total amount of the components (A) and (B).
- the component is preferably 35 parts by mass or more, more preferably 40 parts by mass or more, further preferably 50 parts by mass or more, particularly preferably 55 parts by mass or more, and the component (B). However, it is preferably 15 parts by mass or more, more preferably 20 parts by mass or more, further preferably 30 parts by mass or more, and particularly preferably 35 parts by mass or more.
- the component (C) is not particularly limited as long as it can cure the photosensitive resin layer by irradiation with light (active light). From the viewpoint of transparency, an acylphosphine oxide-based photopolymerization initiator and an oxime ester-based photopolymerization initiator are preferable.
- acylphosphine oxide-based photopolymerization initiator 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2,4,6- Examples thereof include trimethylbenzoyl-phosphinate.
- the acylphosphine oxide-based photopolymerization initiator is available as IRGACURE TPO, IRGACURE 819, or IRGACURE TPO-L (above, manufactured by BASF Japan Ltd., product name).
- Examples of the oxime ester-based photopolymerization initiator include a compound represented by the following general formula (1), a compound represented by the following general formula (2), and a compound represented by the following general formula (3).
- R 11 and R 12 independently represent an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 4 to 10 carbon atoms, a phenyl group or a tolyl group, and have 1 to 8 carbon atoms. It is preferably an alkyl group, a cycloalkyl group having 4 to 6 carbon atoms, a phenyl group or a tolyl group, and is an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 4 to 6 carbon atoms, a phenyl group or a tolyl group.
- R 13 represents -H, -OH, -COOH, -O (CH 2 ) OH, -O (CH 2 ) 2 OH, -COO (CH 2 ) OH or -COO (CH 2 ) 2 OH.
- H, -O (CH 2 ) OH, -O (CH 2 ) 2 OH, -COO (CH 2 ) OH, or -COO (CH 2 ) 2 OH is preferable, and -H, -O (CH 2). ) 2 OH or -COO (CH 2 ) 2 OH is more preferable.
- the two R 14s independently represent an alkyl group having 1 to 6 carbon atoms, and are preferably a propyl group.
- R 15 represents NO 2 or ArCO (where Ar represents an aryl group), and Ar is preferably a tolyl group.
- R 16 and R 17 each independently represent an alkyl group, a phenyl group, or a tolyl group having 1 to 12 carbon atoms, and are preferably a methyl group, a phenyl group, or a tolyl group.
- R 18 represents an alkyl group having 1 to 6 carbon atoms, and is preferably an ethyl group.
- R 19 is an organic group having an acetal bond, and is preferably a substituent corresponding to R 19 contained in a commercially available compound described later.
- R 20 and R 21 each independently represent an alkyl group, a phenyl group or a tolyl group having 1 to 12 carbon atoms, and are preferably a methyl group, a phenyl group or a tolyl group, and more preferably a methyl group. ..
- R 22 represents a hydrogen atom or an alkyl group.
- ADEKA OPTMER N-1919 manufactured by ADEKA Corporation, product name
- IRGACURE OXE 02 manufactured by BASF Japan Ltd., product name
- the content of the component (C) is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the total amount of the components (A) and (B) in terms of excellent light sensitivity and resolution. It is more preferably to 8 parts by mass, further preferably 1 to 6 parts by mass, and particularly preferably 1 to 4 parts by mass.
- a polymerization inhibitor hereinafter, may be referred to as (D) component
- E. Leveling agent
- F Anticorrosive agent
- G Adhesion aid
- (G) component Adhesion aid
- the photosensitive resin layer preferably has a total light transmittance of 85% or more, more preferably 90% or more, and further preferably 95% or more in the visible light region having a wavelength of 400 to 700 nm.
- the total light transmittance in the visible light region can be measured by the method described in the examples of the present specification.
- the cured resin film after curing has the above-mentioned total light transmittance.
- b * in the CIELAB color system is preferably ⁇ 0.2 to 1.0, more preferably 0.0 to 0.7, and 0.1 to 0. It is more preferably 0.4.
- b * in the CIELAB color system can be measured by the method described in the examples of the present specification.
- the cured resin film after curing has the above b * .
- the thickness of the photosensitive resin layer can be 2.5 ⁇ m or less after drying, and is more preferably 0.5 ⁇ m or more and 2.0 ⁇ m or less from the viewpoint of ensuring reliability and improving sensing sensitivity. It is more preferably 0.6 ⁇ m or more and 1.4 ⁇ m or less, and particularly preferably 0.8 ⁇ m or more and 1.2 ⁇ m or less.
- the haze value of the photosensitive resin layer after curing is 0.01 from the viewpoint of improving the sensing sensitivity (for example, bacterial identification, quantification, etc.) on a substrate or the like provided with a dielectrophoresis electrode used for a biosensor or the like. It is preferably ⁇ 1.0%, more preferably 0.01 to 0.50%, further preferably 0.01 to 0.30%, and 0.01 to 0.25%. It is particularly preferable to have.
- the photosensitive resin layer and the intermediate layer are transferred to a polycarbonate (PC) substrate having a thickness of 1.0 mm, exposed under predetermined conditions, and then the intermediate layer is removed. It is obtained from the value obtained by measuring the laminated body of the PC substrate / cured film thus obtained from the cured film side.
- PC polycarbonate
- a polymer film can be used as the protective film 4 (cover film).
- the polymer film include a film made of polyethylene, polypropylene, polyethylene terephthalate, polycarbonate, a polyethylene-vinyl acetate copolymer, and a laminated film of a polyethylene-vinyl acetate copolymer and polyethylene.
- the thickness of the protective film 4 is preferably about 5 to 100 ⁇ m, but from the viewpoint of rolling and storing the protective film 4, it is preferably 70 ⁇ m or less, more preferably 60 ⁇ m or less, and further preferably 50 ⁇ m or less. It is preferably 40 ⁇ m or less, and particularly preferably 40 ⁇ m or less.
- the transfer type photosensitive film 10 can be rolled and stored or used.
- the coating liquid for forming an intermediate layer is applied onto the support film 1 and dried, and then the coating liquid for forming a photosensitive resin layer is applied and dried on the intermediate layer 2. It can be formed by sticking the protective film 40 on the formed photosensitive resin layer 3.
- an intermediate layer is formed by preparing a coating liquid for forming an intermediate layer and a coating liquid for forming a photosensitive resin layer, applying the coating liquid on the support film 1 and the protective film 4, respectively, and drying the coating liquid.
- a transfer-type photosensitive film can also be formed by laminating the supported film and the protective film on which the photosensitive resin layer is formed so that the intermediate layer and the photosensitive resin layer face each other.
- the coating liquid for forming the intermediate layer and the coating liquid for forming the photosensitive resin layer can be prepared by uniformly dissolving or dispersing the components contained in the intermediate layer and the components contained in the photosensitive resin layer described above in a solvent, respectively.
- the solvent is not particularly limited, and known ones can be used. For example, acetone, methyl ethyl ketone, methyl isobutyl ketone, toluene, methanol, ethanol, propanol, butanol, methylene glycol, ethylene glycol, propylene glycol, ethylene glycol monomethyl ether, etc.
- Examples thereof include ethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, propylene glycol monomethyl ether, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, chloroform, and methylene chloride.
- Water can also be used to prepare the coating liquid for forming the intermediate layer.
- One of these solvents may be used alone, or may be used as a mixed solvent composed of two or more kinds of solvents.
- alcohols such as water, methanol, ethanol and isopropanol are preferable, and water and isopropanol are more preferable as the solvent used in the coating liquid for forming the intermediate layer.
- Examples of the coating method include a doctor blade coating method, a Meyer bar coating method, a roll coating method, a screen coating method, a spinner coating method, an inkjet coating method, a spray coating method, a dip coating method, a gravure coating method, a curtain coating method, and the like.
- the die coating method can be mentioned.
- the drying conditions are not particularly limited, but the drying temperature is preferably 60 to 130 ° C., and the drying time is preferably 0.5 to 30 minutes.
- the temperature of the heat roll is 20 to 80 ° C.
- the pressure is 0.2 to 0.8 MPa
- the pressure is 0.2 to 0.8 MPa.
- the roll speed can be set to 0.2 to 4.0 m / min.
- ⁇ Method of forming a cured resin film> 2 and 3 are schematic cross-sectional views for explaining a method of forming a resin cured film according to the present embodiment.
- the transfer type photosensitive film 10 of the present embodiment described above is formed on a base material 20 (base material with steps 24) having a step 22 on one main surface as a protective film.
- Step S1 (see (a) and (b) of FIG. 2) in which the photosensitive resin layer 3 is laminated so as to cover the step 22 while peeling or after peeling 4 and the photosensitive resin on the base material.
- step S2 see FIG.
- the photosensitive resin layer 3 and the intermediate layer 2 are developed from the intermediate layer 2 side in a state where the support film is removed.
- the step S3 (see FIG. 3B) of forming the resin cured film 5 covering the step 22 by removing the portion other than the predetermined portion of the photosensitive resin layer 3 and the intermediate layer 2 by bringing the liquids into contact with each other. Be prepared. In this way, the base material 40 with a resin cured film is obtained.
- Examples of the base material 20 include polyethylene terephthalate and polycarbonate.
- the step 22 includes a transparent electrode such as ITO, wiring such as copper, copper / nickel alloy, gold, platinum, ruthenium, palladium, rhodium, silver, aluminum, nickel, chromium, zinc, tin, or a dielectric containing metal materials thereof. Examples thereof include those caused by a running electrode, an optical sensor, and the like. These may be provided in two or more types, or may be provided in two or more types.
- a transparent electrode such as ITO
- wiring such as copper, copper / nickel alloy, gold, platinum, ruthenium, palladium, rhodium, silver, aluminum, nickel, chromium, zinc, tin, or a dielectric containing metal materials thereof. Examples thereof include those caused by a running electrode, an optical sensor, and the like. These may be provided in two or more types, or may be provided in two or more types.
- Examples of the stepped base material 24 include a substrate provided with a dielectrophoresis electrode used for a biosensor or the like, an optical sensor substrate, a touch sensor substrate for a touch panel, and the like.
- Examples of the laminating means in step S1 of the present embodiment include crimping rolls.
- the crimping roll may be provided with a heating means so that it can be heat crimped.
- the heating temperature at the time of heat-bonding is such that the constituent components of the photosensitive resin layer are not easily cured or thermally decomposed from the viewpoint of obtaining adhesion between the photosensitive resin layer and the base material and followability to the step.
- the temperature is preferably 10 to 180 ° C, more preferably 20 to 160 ° C, and even more preferably 30 to 150 ° C.
- the crimping pressure at the time of heat crimping is preferably 50 to 1 ⁇ 10 5 N / m in terms of linear pressure from the viewpoint of ensuring adhesion, and is 2.5 ⁇ 10 2 to 5 ⁇ 10 4 N / m. 5 ⁇ 10 2 to 4 ⁇ 10 4 N / m is more preferable.
- the transfer-type photosensitive film is heated as described above, it is not necessary to preheat the substrate, but the substrate is preheated from the viewpoint of further improving the adhesion between the photosensitive resin layer and the substrate. It is preferable to do so.
- the preheating temperature at this time is preferably 30 to 180 ° C.
- step S2 of the present embodiment a predetermined portion of the photosensitive resin layer is irradiated with light (active light) L in a pattern via a photomask 30 (see (a) of FIG. 3).
- the active light When irradiating the active light, if the support film on the intermediate layer is transparent, the active light is irradiated as it is (for example, when a transparent polymer film is used as the support film, the polymer film remains). If it is opaque, it can be removed and then irradiated with active light.
- a known active light source can be used, and examples thereof include a carbon arc lamp, an ultra-high pressure mercury lamp, a high pressure mercury lamp, a xenon lamp, and those that effectively radiate ultraviolet rays are preferable. Can be used for.
- the irradiation amount of the active light L is usually 1 ⁇ 10 2 to 1 ⁇ 10 4 J / m 2 , and heating may be accompanied at the time of irradiation.
- the amount of the activated light irradiation is within the above range, it becomes easy to achieve both sufficient photocuring and suppressing discoloration of the photosensitive resin layer.
- step S3 of the present embodiment the photosensitive resin layer and the intermediate layer after irradiation with the active light are developed with a developing solution, and the portion of the photosensitive resin layer not irradiated with the active light (that is, the photosensitive resin layer). (Other than the predetermined portion) and the intermediate layer are removed to form a resin cured film 5 that covers the step (see (b) of FIG. 3).
- the resin cured film 5 to be formed can have a predetermined pattern.
- the support film After irradiation with the active light beam, if the support film is laminated on the intermediate layer, it is removed, and then the portion not irradiated with the active light beam is removed with a developing solution.
- a known developing solution such as an alkaline aqueous solution, an aqueous developer, or an organic solvent is used to develop by a known method such as spraying, showering, rocking dipping, brushing, and scrubbing to remove unnecessary parts.
- a known method such as spraying, showering, rocking dipping, brushing, and scrubbing to remove unnecessary parts.
- alkali hydroxide hydrooxide of lithium, sodium or potassium, etc.
- alkali carbonate carbonate or bicarbonate of lithium, sodium or potassium, etc.
- alkali metal phosphate potassium phosphate, etc.
- Sodium phosphate, etc. alkali metal pyrophosphate
- tetramethylammonium hydroxide triethanolamine, etc.
- tetramethylammonium hydroxide and the like are preferable. Be done.
- An aqueous solution of sodium carbonate is also preferably used.
- a dilute solution of sodium carbonate 0.5 to 5% by mass aqueous solution
- 20 to 50 ° C. is preferably used.
- the developing temperature and time can be adjusted according to the developability of the photosensitive resin layer and the intermediate layer of the present embodiment.
- a surfactant a defoaming agent, a small amount of organic solvent for accelerating development, etc. can be mixed in the alkaline aqueous solution.
- the base of the alkaline aqueous solution remaining in the photosensitive resin layer after development and photocuring is subjected to a known method such as spraying, rocking dipping, brushing, scrubbing or the like using an organic acid, an inorganic acid or an aqueous acid solution thereof. It can be acid-treated (neutralized).
- the resin cured film pattern may be further cured by irradiation with active light rays (for example, 5 ⁇ 10 3 to 2 ⁇ 10 4 J / m 2 ). Further, if necessary, heat treatment (80 to 250 ° C.) may be performed instead of the irradiation of the activated light rays after development or in combination with the irradiation of the active rays.
- active light rays for example, 5 ⁇ 10 3 to 2 ⁇ 10 4 J / m 2
- heat treatment 80 to 250 ° C.
- the above-described method for forming a cured resin film of the present embodiment can be used as a method for manufacturing a sensor substrate with a cured resin film. That is, as the stepped base material 24, a substrate having a transparent electrode and / or wiring on one main surface (for example, a touch sensor substrate) or a substrate having a dielectrophoresis electrode (for example, a biosensor substrate) is prepared. By going through the same steps as described above, a sensor substrate with a resin cured film provided with a transparent electrode and / or wiring, or a resin cured film covering the dielectrophoresis electrode can be obtained.
- the sensor substrate with a resin cured film provided with a dielectrophoresis electrode can also function as a dielectric film, and can be applied to an apparatus (for example, a microorganism measuring apparatus) that may come into contact with a liquid sample. ..
- the stepped base material is an optical sensor substrate having an optical sensor on one main surface
- a resin cured film having a sufficiently small effect on the optical characteristics of the sensor is used as a protective film to prevent damage or deterioration of the sensor.
- Such a sensor substrate with a resin cured film can be applied to a device (for example, a food inspection device) that may be contaminated by moisture or the like.
- Binder polymer solution A1 Binder polymer solution A1 (1) shown in Table 1 was placed in a flask equipped with a stirrer, a reflux condenser, an inert gas inlet and a thermometer, and the temperature was raised to 80 ° C. in a nitrogen gas atmosphere. While maintaining the reaction temperature at 80 ° C. ⁇ 2 ° C., (2) shown in Table 1 was uniformly added dropwise over 4 hours. After the dropping of (2), stirring was continued at 80 ° C. ⁇ 2 ° C. for 6 hours to obtain a solution (solid content 50% by mass) (A1) of a binder polymer having a weight average molecular weight of 45,000. The acid value of the binder polymer was 114.2 mgKOH / g. The glass transition temperature (Tg) was 60 ° C.
- the weight average molecular weight, acid value and glass transition temperature of the binder polymer were determined by the following measurement methods.
- the acid value was measured by the neutralization titration method based on JIS K0070 as shown below. First, the solution of the binder polymer was heated at 130 ° C. for 1 hour to remove the volatile matter to obtain a solid content. Then, 1.0 g of this solid polymer was precisely weighed, and then 30 g of acetone was added to this polymer, and this was uniformly dissolved to obtain a resin solution. Next, an appropriate amount of phenolphthalein, which is an indicator, was added to the resin solution, and titration was performed using a 0.1 mol / L potassium hydroxide aqueous solution. Then, the acid value was calculated by the following formula.
- Acid value 0.1 x V x f 1 x 56.1 / (Wp x I / 100)
- V indicates the titration amount (mL) of the 0.1 mol / L potassium hydroxide aqueous solution used for titration
- f 1 indicates the factor (concentration conversion coefficient) of the 0.1 mol / L potassium hydroxide aqueous solution.
- Wp indicates the measured mass (g) of the resin solution
- I indicates the ratio of the non-volatile content (mass%) in the measured resin solution.
- Tg glass transition temperature
- the film was exposed.
- the exposed film was heated on a hot plate at 65 ° C. for 2 minutes, then at 95 ° C. for 8 minutes, and heat-treated at 180 ° C. for 60 minutes in a hot air convection dryer.
- the formed cured film was peeled off from the polyethylene terephthalate film, and the coefficient of thermal expansion of the cured film when the temperature was raised at a temperature rising rate of 5 ° C./min was measured using TMA / SS6000 manufactured by Seiko Instruments. The inflection point obtained from the curve was determined as the glass transition temperature Tg.
- Coating liquid R1 for forming a photosensitive resin layer containing a photosensitive resin composition for forming a photosensitive resin layer by mixing each component shown in Table 3 in an amount (unit: parts by mass) shown in the same table.
- the blending amounts other than the solvent in Table 3 are the blending amounts in terms of solid content.
- A-TMPT Trimethylolpropane triacrylate (manufactured by Shin Nakamura Chemical Industry Co., Ltd., product name "A-TMPT")
- A-DCP Tricyclodecanedimethanol diacrylate (manufactured by Shin Nakamura Chemical Industry Co., Ltd., product name "A-DCP")
- BPE-100 Ethoxylated bisphenol A dimethacrylate (manufactured by Shin Nakamura Chemical Industry Co., Ltd., product name "BPE-100")
- Solvent MEK Methyl ethyl ketone (manufactured by Tonen Chemical Corporation)
- the coating liquid R1 for forming the photosensitive resin layer was uniformly applied onto the intermediate layer formed above using a bar coater, dried on a hot plate at 80 ° C. for 5 minutes, and the thickness after drying is shown in Table 4.
- a photosensitive resin layer was formed so as to have the indicated layer thickness.
- a polypropylene film as a protective film is laminated on the formed photosensitive resin layer, and a support film, an intermediate layer, a photosensitive resin layer, and a protective film are laminated in this order. I got a film.
- the developability of the intermediate layer, the resolution of the photosensitive resin layer, and the reliability were evaluated by the following methods.
- a photosensitive resin layer was laminated on a glass substrate (length 6 cm ⁇ width 6 cm, thickness 1 mm) while peeling off the protective film of the transfer type photosensitive film.
- Lamination was performed using a laminator "MRK-650Y” (manufactured by MCK Co., Ltd., product name) under the conditions of a heat roll temperature of 110 ° C., a pressure of 0.40 MPa, and a roll speed of 0.6 m / min. In this way, a laminated body 1 in which a glass substrate, a photosensitive resin layer, an intermediate layer, and a support film were laminated in this order was obtained.
- the exposed laminate 2 was developed with a 1% by mass aqueous sodium carbonate solution.
- the developing was carried out using a developing machine under the conditions of a spray pressure of 0.2 MPa, a temperature of 30 ° C., and a developing time of 30 seconds to obtain a laminate 3.
- a photosensitive resin layer was laminated on a PET film (manufactured by Toyobo Co., Ltd., trade name A4300) while peeling off the protective film of the transfer type photosensitive film.
- Lamination was performed using a laminator "MRK-650Y” (manufactured by MCK Co., Ltd., product name) under the conditions of a heat roll temperature of 110 ° C., a pressure of 0.40 MPa, and a roll speed of 0.6 m / min. In this way, a laminate 1A in which the PET film, the photosensitive resin layer, the intermediate layer, and the support film were laminated in this order was obtained.
- the laminated body 1A was irradiated with ultraviolet rays from the support film side using a parallel light exposure machine "EXM1201" (manufactured by ORC Manufacturing Co., Ltd., product name) to obtain the laminated body 2A.
- EXM1201 manufactured by ORC Manufacturing Co., Ltd., product name
- a PET photomask having a wiring pattern with a line width / space width of 30/30 to 200/200 (unit: ⁇ m) is brought into close contact with the support film, and ultraviolet rays are irradiated through the photomask. did.
- the exposure amount was the amount required to obtain 9/4 1 step with a 41-step step tablet manufactured by Hitachi Chemical Co., Ltd.
- the exposed laminate 2A was developed with a 1% by mass aqueous sodium carbonate solution.
- the development was carried out using a developing machine under the conditions of a spray pressure of 0.2 MPa, a temperature of 30 ° C., and a development time of 30 seconds to obtain a pattern substrate 3A.
- the obtained pattern substrate 3A was observed with an optical microscope, and among the patterns remaining as lines and spaces, there were no defects such as chips in the lines, and the space between the lines was bridged by the residue of the photosensitive resin.
- the numerical value of the minimum line width / space width that never existed was examined and set as the resolution ( ⁇ m). From the numerical value of this resolution, the resolution was evaluated according to the following criteria. [Criteria] A: Resolution ⁇ 50 ⁇ m B: 50 ⁇ m ⁇ resolution ⁇ 200 ⁇ m C: Resolution> 200 ⁇ m
- the reliability was evaluated by the following method.
- a polyethylene terephthalate film with sputtered copper having a thickness of 0.1 ⁇ m (hereinafter referred to as “copper PET”) was prepared in a size of 15 cm ⁇ 15 cm.
- the transfer-type photosensitive film produced above was laminated on a main surface provided with sputtered copper of copper PET while peeling off the protective film, and the sputtered copper was coated with a photosensitive resin layer.
- Lamination was performed using a laminator "MRK-650Y” (manufactured by MCK Co., Ltd., product name) under the conditions of a heat roll temperature of 110 ° C., a pressure of 0.40 MPa, and a roll speed of 0.6 m / min. In this way, a laminate 3B in which the copper PET, the photosensitive resin layer, the intermediate layer, and the support film were laminated in this order was obtained.
- MRK-650Y manufactured by MCK Co., Ltd., product name
- the laminate 4B was developed with a 1% by mass aqueous sodium carbonate solution.
- the development was carried out using a developing machine under the conditions of a spray pressure of 0.2 MPa, a temperature of 30 ° C., and a development time of 30 seconds.
- ultraviolet rays were irradiated from the photosensitive resin layer side with an exposure amount of 1000 mJ / cm 2 (i-line (wavelength 365 nm)) to obtain a reliability evaluation substrate.
- the prepared reliability evaluation substrate was stored in a high temperature and high humidity bath for 48 hours.
- the conditions inside the tank were a temperature of 60 ° C. and a humidity of 90%.
- the surface of the substrate after storage was observed, and the reliability was evaluated according to the following criteria.
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Abstract
Description
図1は、本実施形態に係る転写型感光性フィルムの模式断面図である。本実施形態の転写型感光性フィルム10は、支持フィルム1と、中間層2と、感光性樹脂層3と、保護フィルム4とがこの順に積層された構造を有する。本実施形態の転写型感光性フィルムは、保護フィルム4が省略されて巻回されているものであってもよい。この場合、外側の転写型感光性フィルムの感光性樹脂層に内側の転写型感光性フィルムの支持フィルムが隣接することで、感光性樹脂層が保護される。
支持フィルム1としては、重合体フィルムを用いることができる。重合体フィルムの材質としては、ポリエチレンテレフタレート、ポリカーボネート、ポリエチレン、ポリプロピレン、ポリエーテルサルフォン、シクロオレフィンポリマー等が挙げられる。
中間層2は、水溶性高分子を含むことができる。水溶性高分子としては、ポリビニルアルコール、ポリビニルエーテル-無水マレイン酸水溶性塩類、カルボキシアルキル澱粉水溶性塩類、ポリアクリルアミド、ポリアミド、ポリアクリル酸水溶性塩類、ゼラチン、ポリプロピレングリコール、ポリビニルピロリドン等が挙げられる。
感光性樹脂層3は、バインダーポリマー(以下、(A)成分ともいう)と、光重合性化合物(以下、(B)成分ともいう)と、光重合開始剤(以下、(C)成分ともいう)と、を含有する感光性樹脂組成物から形成することができる。
図2及び図3は、本実施形態に係る樹脂硬化膜の形成方法を説明するための模式断面図である。本実施形態の樹脂硬化膜の形成方法は、一主面上に段差22を有する基材20(段差付基材24)上に、上述した本実施形態の転写型感光性フィルム10を、保護フィルム4を剥離しながら又は剥離してから感光性樹脂層3が段差22を被覆するようにラミネートする工程S1(図2の(a)及び(b)を参照)と、基材上の感光性樹脂層3の所定部分に光Lを照射する工程S2(図3の(a)を参照)と、感光性樹脂層3及び中間層2に、支持フィルムが除去された状態の中間層2側から現像液を接触させることにより、感光性樹脂層3の所定部分以外及び中間層2を除去し、段差22を被覆する樹脂硬化膜5を形成する工程S3(図3の(b)を参照)とを備える。こうして、樹脂硬化膜付基材40が得られる。
(バインダーポリマー溶液A1)
撹拌機、還流冷却器、不活性ガス導入口及び温度計を備えたフラスコに、表1に示す(1)を仕込み、窒素ガス雰囲気下で80℃に昇温した。反応温度を80℃±2℃に保ちながら、表1に示す(2)を4時間かけて均一に滴下した。(2)の滴下後、80℃±2℃で6時間撹拌を続け、重量平均分子量が45000のバインダーポリマーの溶液(固形分50質量%)(A1)を得た。バインダーポリマーの酸価は、114.2mgKOH/gであった。また、ガラス転移温度(Tg)は60℃であった。
重量平均分子量(Mw)は、ゲルパーミエーションクロマトグラフィー法(GPC)によって測定し、標準ポリスチレンの検量線を用いて換算することにより導出した。GPCの測定条件を以下に示す。
<GPC測定条件>
ポンプ:日立 L-6000型(株式会社日立製作所製、製品名)
カラム:Gelpack GL-R420、Gelpack GL-R430、Gelpack GL-R440(以上、日立化成株式会社製、製品名)
溶離液:テトラヒドロフラン
測定温度:40℃
試料濃度:NV(不揮発分濃度)50質量%の樹脂溶液を120mg採取、5mLのTHFに溶解
注入量:200μL
流量:2.05mL/分
検出器:日立 L-3300型RI(株式会社日立製作所製、製品名)
酸価は下記に示すような、JIS K0070に基づいた中和滴定法により測定した。まず、バインダーポリマーの溶液を、130℃で1時間加熱し、揮発分を除去して、固形分を得た。そして、この固形分のポリマー1.0gを精秤した後、このポリマーにアセトンを30g添加し、これを均一に溶解し、樹脂溶液を得た。次いで、指示薬であるフェノールフタレインをその樹脂溶液に適量添加して、0.1mol/Lの水酸化カリウム水溶液を用いて滴定を行った。そして、次式により酸価を算出した。
酸価=0.1×V×f1×56.1/(Wp×I/100)
式中、Vは滴定に用いた0.1mol/Lの水酸化カリウム水溶液の滴定量(mL)を示し、f1は0.1mol/Lの水酸化カリウム水溶液のファクター(濃度換算係数)を示し、Wpは測定した樹脂溶液の質量(g)を示し、Iは測定した上記樹脂溶液中の不揮発分の割合(質量%)を示す。
バインダーポリマー溶液をポリエチレンテレフタレートフィルム(帝人デュポンフィルム株式会社製、製品名「ピューレックスA53」)上に均一に塗布し、90℃の熱風対流式乾燥機で10分間乾燥して、乾燥後の厚みが40μmであるバインダーポリマーからなる膜を形成した。次いで高圧水銀ランプを有する露光機(株式会社オーク製作所製、商品名「EXM-1201」)を用いて、照射エネルギー量が400mJ/cm2(i線(波長365nm)における測定値)となるように上記膜を露光した。露光された膜をホットプレート上にて65℃で2分間、次いで95℃で8分間加熱し、熱風対流式乾燥機にて180℃で60分間加熱処理をした。形成された硬化膜を、ポリエチレンテレフタレートフィルムから剥離し、セイコーインスツルメンツ社製TMA/SS6000を用いて、昇温速度5℃/分で温度を上昇させたときの上記硬化膜の熱膨張率を測定し、その曲線から得られる変曲点をガラス転移温度Tgとして求めた。
(調製例1~8)
ポリビニルアルコール(固形分13.5質量%)(大成化薬株式会社製、製品名:マルタイトHC-100G)、ポリビニルピロリドン(株式会社日本触媒製、製品名:K-30)、レベリング剤(共栄社化学株式会社製、WS-314)、イソプロピルアルコール(特級)(和光純薬工業株式会社製)、及び精製水を表2に示す割合で混合し、表2に示す条件で溶解することにより、中間層形成用塗布液1~8をそれぞれ得た。
表3に示す各成分を同表に示す量(単位:質量部)で混合することにより、感光性樹脂層を形成するための感光性樹脂組成物を含有する感光性樹脂層形成用塗布液R1を調製した。なお、表3中の溶剤以外の配合量は、いずれも固形分での配合量である。
(A)成分
A1:上記で得られたバインダーポリマー溶液A1
A-TMPT:トリメチロールプロパントリアクリレート(新中村化学工業株式会社製、製品名「A-TMPT」)
A-DCP:トリシクロデカンジメタノールジアクリレート(新中村化学工業株式会社製、製品名「A-DCP」)
BPE-100:エトキシ化ビスフェノールAジメタクリレート(新中村化学工業株式会社製、製品名「BPE-100」)
OXE-01:1,2-オクタンジオン,1-[4-(フェニルチオ)フェニル-,2-(O-ベンゾイルオキシム)](BASFジャパン株式会社製、製品名「IRGACURE OXE 01」)
Antage W-500:2,2’-メチレン-ビス(4-エチル-6-tert-ブチルフェノール)(川口化学工業株式会社製、製品名「Antage W-500」)
Additive8032:有機変性シリコーンオイル(東レダウコーニング株式会社製、製品名「Additive8032」)
チオエールB-6030:テトラゾール(固形分5質量%)(千代田ケミカル株式会社製、製品名「チオエールB-6030」)
PM-21:2-ヒドロキシエチルメタクリレートの6-ヘキサノリド付加重合物と無水リン酸との反応生成物(日本化薬株式会社社製、製品名「PM-21」)
MEK:メチルエチルケトン(東燃化学合同会社製)
(実施例1~4及び比較例1~4)
<中間層の形成>
支持フィルムとして厚さ16μmのポリエチレンテレフタレートフィルムを用意し、上記で調製した中間層形成用塗布液1~8を、支持フィルム上にバーコーターを用いて均一に塗布し、80℃の熱風対流式乾燥機で10分間乾燥し、乾燥後の厚みが表4に示される層厚となるように中間層をそれぞれ形成した。
まず、中間層の1m2の範囲を目視検査し、中間層の異物部分をマーキングした。次に、マーキング箇所の顕微鏡観察により異物が粒子であると判断したものについて上面から見たときの粒子の大きさ(粒径)を測定した。なお、上面から見た粒子が円形でない場合は、最大径を粒径とした。中間層の厚みの0.5倍を超える粒径を有する粒子の数、及び5μm以上の粒径を有する粒子の数をカウントした。
上記で形成された中間層上に、感光性樹脂層形成用塗布液R1を、バーコーターを用いて均一に塗布し、80℃のホットプレートで5分間乾燥し、乾燥後の厚みが表4に示される層厚となるように感光性樹脂層を形成した。
転写型感光性フィルムの保護フィルムを剥がしながら、ガラス基板(縦6cm×横6cm、厚み1mm)に感光性樹脂層をラミネートした。ラミネートは、ラミネータ「MRK-650Y」(株式会社MCK製、製品名)を用い、ヒートロール温度110℃、圧力0.40MPa、ロール速度0.6m/分の条件で行った。こうして、ガラス基板、感光性樹脂層、中間層及び支持フィルムの順に積層された積層体1を得た。
[判定基準]
A:中間層が無い(中間層の現像性が良好)。
B:樹脂硬化膜上の一部に中間層がある(中間層の現像残渣が発生している)。
転写型感光性フィルムの保護フィルムを剥がしながら、PETフィルム(東洋紡製、商品名A4300)に感光性樹脂層をラミネートした。ラミネートは、ラミネータ「MRK-650Y」(株式会社MCK製、製品名)を用い、ヒートロール温度110℃、圧力0.40MPa、ロール速度0.6m/分の条件で行った。こうして、PETフィルム、感光性樹脂層、中間層及び支持フィルムの順に積層された積層体1Aを得た。
[判定基準]
A:解像度≦50μm
B:50μm<解像度≦200μm
C:解像度>200μm
以下の方法で、信頼性を評価した。厚さ0.1μmのスパッタ銅付きポリエチレンテレフタレートフィルム(以下、「銅PET」という)を15cm×15cmのサイズで用意した。次いで、上記で作製した転写型感光性フィルムを、保護フィルムを剥がしながら、銅PETのスパッタ銅が設けられた主面上にラミネートし、感光性樹脂層でスパッタ銅を被覆した。ラミネートは、ラミネータ「MRK-650Y」(株式会社MCK製、製品名)を用い、ヒートロール温度110℃、圧力0.40MPa、ロール速度0.6m/分の条件で行った。こうして、銅PET、感光性樹脂層、中間層及び支持フィルムの順に積層された積層体3Bを得た。
[判定基準]
A:銅表面に変化なし
B:銅表面に変色あり
Claims (11)
- 支持フィルムと、水溶性高分子を含む中間層と、感光性樹脂層と、がこの順に積層された構造を有し、
前記感光性樹脂層の厚みが2μm以下であり、
前記中間層の厚みが5~20μmであり、
前記中間層に存在し、当該中間層の厚みの0.5倍を超える粒径を有する粒子の含有量が50個/m2以下である、転写型感光性フィルム。 - 前記中間層に存在し、5μm以上の粒径を有する粒子の含有量が60個/m2以下である、請求項1に記載の転写型感光性フィルム。
- 前記中間層がポリビニルアルコールを45質量%以上含む、請求項1又は2に記載の転写型感光性フィルム。
- 前記中間層の厚みが5~15μmである、請求項1~3のいずれか一項に記載の転写型感光性フィルム。
- バイオセンサ基板上に保護膜を形成するために用いる、請求項1~4のいずれか一項に記載の転写型感光性フィルム。
- 誘電泳動電極を有するバイオセンサ基板の前記誘電泳動電極上に保護膜を形成するために用いる、請求項1~4のいずれか一項に記載の転写型感光性フィルム。
- 一主面上に段差を有する基材上に、請求項1~4のいずれか一項に記載の転写型感光性フィルムを、前記感光性樹脂層が前記段差を被覆するようにラミネートする工程と、
前記基材上の前記感光性樹脂層の所定部分に光を照射する工程と、
前記感光性樹脂層及び前記中間層に、前記支持フィルムが除去された状態の前記中間層側から現像液を接触させることにより、前記感光性樹脂層の前記所定部分以外及び前記中間層を除去し、前記段差を被覆する樹脂硬化膜を形成する工程と、
を備える、樹脂硬化膜の形成方法。 - 前記段差が、前記基材の前記主面上に設けられた透明電極及び/又は配線に起因する段差である、請求項7に記載の樹脂硬化膜の形成方法。
- 前記段差が、前記基材の前記主面上に設けられた誘電泳動電極に起因する段差である、請求項7に記載の樹脂硬化膜の形成方法。
- 一主面上に透明電極及び/又は配線を有する基板上に、請求項1~4のいずれか一項に記載の転写型感光性フィルムを、前記感光性樹脂層が前記透明電極及び/又は前記配線を被覆するようにラミネートする工程と、
前記基板上の前記感光性樹脂層の所定部分に光を照射する工程と、
光照射された前記感光性樹脂層及び前記中間層に、前記支持フィルムが除去された状態の前記中間層側から現像液を接触させることにより、前記感光性樹脂層の前記所定部分以外及び前記中間層を除去し、前記透明電極及び/又は前記配線を被覆する樹脂硬化膜を形成する工程と、
を備える、樹脂硬化膜付基板の製造方法。 - 一主面上に誘電泳動電極を有する基板上に、請求項1~4のいずれか一項に記載の転写型感光性フィルムを、前記感光性樹脂層が前記誘電泳動電極を被覆するようにラミネートする工程と、
前記基板上の前記感光性樹脂層の所定部分に光を照射する工程と、
光照射された前記感光性樹脂層及び前記中間層に、前記支持フィルムが除去された状態の前記中間層側から現像液を接触させることにより、前記感光性樹脂層の前記所定部分以外及び前記中間層を除去し、前記誘電泳動電極を被覆する樹脂硬化膜を形成する工程と、
を備える、樹脂硬化膜付基板の製造方法。
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