WO2015046261A1 - タッチパネル、感放射線性樹脂組成物および硬化膜 - Google Patents
タッチパネル、感放射線性樹脂組成物および硬化膜 Download PDFInfo
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- WO2015046261A1 WO2015046261A1 PCT/JP2014/075310 JP2014075310W WO2015046261A1 WO 2015046261 A1 WO2015046261 A1 WO 2015046261A1 JP 2014075310 W JP2014075310 W JP 2014075310W WO 2015046261 A1 WO2015046261 A1 WO 2015046261A1
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- resin composition
- touch panel
- sensitive resin
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
-
- 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
- G03F7/0047—Photosensitive materials characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing
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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
- G03F7/022—Quinonediazides
- G03F7/023—Macromolecular quinonediazides; Macromolecular additives, e.g. binders
- G03F7/0233—Macromolecular quinonediazides; Macromolecular additives, e.g. binders characterised by the polymeric binders or the macromolecular additives other than the macromolecular quinonediazides
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/037—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyamides or polyimides
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/075—Silicon-containing compounds
- G03F7/0751—Silicon-containing compounds used as adhesion-promoting additives or as means to improve adhesion
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/075—Silicon-containing compounds
- G03F7/0757—Macromolecular compounds containing Si-O, Si-C or Si-N bonds
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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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
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/36—Amides or imides
- C08F222/40—Imides, e.g. cyclic imides
- C08F222/402—Alkyl substituted imides
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Definitions
- the present invention relates to a touch panel, a radiation sensitive resin composition, and a cured film.
- the touch panel touches (presses) the surface with an operator's finger or pen, and outputs data related to the touch operation to various processing devices, thereby enabling operation of the electronic device.
- the touch panel is an input device that replaces a keyboard, and enables easy input of information in an interactive manner in the electronic device described above.
- touch panels such as a resistive film method, a capacitance method, an infrared method, an ultrasonic method, and an electromagnetic inductive coupling method, depending on the operation principle.
- a plurality of first detection electrodes extending in a predetermined direction and a second detection electrode extending in a direction crossing the plurality of first detection electrodes, such as a capacitance method, are combined to form a transparent substrate such as glass.
- a structure to be placed on top are formed.
- These detection electrodes are routed to the end of the transparent substrate by wirings electrically connected to each. At the other end of the wiring connected to the detection electrode, for example, a terminal for connecting the touch panel is formed.
- each of the first detection electrode and the second detection electrode has a rhombus-shaped electrode pad having a large area and a connecting portion having a narrow shape narrower than the electrode pad, which connects between the electrode pads. It consists of.
- the first detection electrode and the second detection electrode intersect with each other at each connection portion, and a light transmissive interlayer insulating film is disposed at the intersection. Therefore, the touch panel of Patent Document 1 is configured such that the first detection electrode and the second detection electrode overlap each other through the interlayer insulating film at each connection portion, thereby ensuring insulation. .
- the first detection electrode and the second detection electrode are routed to the end of the transparent substrate by wirings electrically connected to each.
- a terminal for connecting a touch panel is formed at the other end of the wiring connected to the detection electrode.
- the touch panel having such a structure is configured to include a detection electrode and a wiring electrically connected to the detection electrode and routed to the end of the substrate on an insulating substrate.
- the wiring connected to each detection electrode is not directly used for detection of a touch operation with an operator's finger or the like. That is, in the touch panel, the formation area of the wiring connected to each detection electrode is an area not used for the touch operation and its detection.
- the wiring formation region is preferably small and narrow.
- the touch panel can be provided with a large operation area in which a touch operation is performed by touching an operator's finger or the like.
- each wiring electrically connected to the detection electrode in order to narrow the wiring formation area, it is preferable to form each wiring electrically connected to the detection electrode thinly. For this purpose, it is required to form the wiring using a low-resistance material.
- the wiring connected to the detection electrode can be, for example, a metal wiring using a metal such as copper, and a reduction in resistance can be realized.
- the touch panel uses a glass substrate or the like as the substrate, for example, the metal wiring made of copper has low adhesion to the substrate.
- the touch panel is required to have sufficient strength to withstand deformation because the operator may actually use the finger by touching the operation area while pressing the operation area.
- the touch panel is required not to cause defects such as peeling of components such as wiring from the substrate.
- the touch panel is required to have high reliability so that it can be used for a long period of time while suppressing defects such as disconnection and peeling of the detection electrodes and wiring.
- Patent Document 2 a copper alloy in which an appropriate additive element is added to copper (Cu), this additive element forms an oxide film to form a film, which suppresses Cu oxidation, and the film has an adjacent insulating layer. Is formed at the interface of each other to suppress interdiffusion.
- This provides a copper wiring that is highly conductive and has excellent adhesion to the substrate.
- the adhesion between the oxide film and the protective film of the organic film that covers the copper wiring is low, and moisture from the outside penetrates and corrodes the copper wiring. There was a problem to make.
- the present invention has been made in view of the above problems. That is, the object of the present invention is to provide a metal wiring having good adhesion between a metal wiring film formed of a metal oxide film and a cured film that is an organic film covering the metal wiring, and having high reliability. It is in providing the touch panel which has.
- an object of the present invention is to provide a radiation sensitive resin composition used to form a cured film that covers the metal wiring of the touch panel and has good adhesion to the metal wiring.
- Another object of the present invention is to provide a cured film that covers the metal wiring of the touch panel and has good adhesion to the metal wiring.
- a first aspect of the present invention is a touch panel having a metal wiring and a cured film covering at least a part of the metal wiring,
- the metal wiring is a metal wiring containing copper and a second metal element other than copper,
- the cured film is formed using a radiation-sensitive resin composition containing (A) a photosensitive agent, and (B) at least one of an alkoxysilyl group-containing compound and a hydrolysis condensate of the compound. It is related with the touch panel.
- the metal wiring includes a first layer containing copper and an oxide of a second metal element other than copper and configured to cover at least a part of the first layer.
- a metal wiring having two layers is preferable.
- the second metal element is lithium, germanium, strontium, tin, barium, praseodymium, neodymium, phosphorus, manganese, magnesium, calcium, nickel, zinc, silicon, aluminum, beryllium, gallium. , Indium, iron, titanium, vanadium, cobalt, zirconium, and hafnium.
- the second metal element is manganese.
- the cured film is preferably formed using a radiation-sensitive resin composition further containing (C) an alkali-soluble resin.
- component of the radiation sensitive resin composition which forms the said cured film contains at least 1 sort (s) chosen from the group which consists of the acrylic resin which has a carboxyl group, polyamide, and polysiloxane. It is preferable.
- the cured film is preferably formed using a radiation sensitive resin composition further containing (D) an antioxidant.
- the cured film is further (F) at least one selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, indium, tin, antimony, strontium, barium, cerium and hafnium. It is preferably formed using a radiation-sensitive resin composition containing inorganic oxide particles that are oxides containing these elements.
- the component (A) of the radiation-sensitive resin composition forming the cured film preferably contains at least one of a photoacid generator and a photopolymerization initiator.
- component of the radiation sensitive resin composition which forms the said cured film contains the compound which has at least 1 sort (s) of an amino group, a block amino group, an isocyanate group, and a blocked isocyanate group. It is preferable.
- a second aspect of the present invention is a radiation-sensitive resin composition
- a radiation-sensitive resin composition comprising (A) a photosensitizing agent, and (B) an alkoxysilyl group-containing compound and a hydrolysis condensate of the compound.
- a metal wiring having a first layer containing copper and a second layer including an oxide of a second metal element other than copper and configured to cover at least a part of the first layer, and at least a part of the metal wiring It is related with the radiation sensitive resin composition characterized by being used for formation of this cured film of the touch panel which has a cured film which covers.
- (C) an alkali-soluble resin is further contained.
- the (C) component contains at least 1 sort (s) chosen from the group which consists of the acrylic resin which has a carboxyl group, polyamide, and polysiloxane. preferable.
- the oxide of the second metal element contained in the second layer of the metal wiring is lithium, germanium, strontium, tin, barium, praseodymium, neodymium, phosphorus, manganese, magnesium, It is preferably an oxide of at least one element selected from the group consisting of calcium, nickel, zinc, silicon, aluminum, beryllium, gallium, indium, iron, titanium, vanadium, cobalt, zirconium and hafnium.
- (E) a polyfunctional (meth) acrylate is further contained.
- it further comprises (F) at least one element selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, indium, tin, antimony, strontium, barium, cerium and hafnium. It is preferable to include inorganic oxide particles that are oxides.
- the component (A) preferably contains at least one of a photoacid generator and a photopolymerization initiator.
- the component (B) preferably contains a compound having at least one of an amino group, a blocked amino group, an isocyanate group and a blocked isocyanate group.
- a third aspect of the present invention is formed from a radiation-sensitive resin composition
- a radiation-sensitive resin composition comprising (A) a photosensitizing agent, and (B) an alkoxysilyl group-containing compound and a hydrolysis condensate of the compound.
- the metal of a touch panel including a metal wiring having a first layer containing copper and a second layer containing an oxide of a second metal element other than copper and configured to cover at least a part of the first layer
- the present invention relates to a cured film that is used to cover at least a part of a wiring.
- the adhesion between the metal wiring film formed of the metal oxide film and the cured film, which is an organic film covering the metal wiring, is good, A touch panel having high reliability can be obtained.
- a radiation-sensitive resin composition used for forming a cured film that covers the metal wiring of the touch panel and has good adhesion to the metal wiring is obtained.
- a cured film that covers the metal wiring of the touch panel and has good adhesion to the metal wiring is obtained.
- FIG. 2 is a sectional view taken along line B-B ′ of FIG. 1. It is sectional drawing which shows typically an example of the structure of the wiring which the touchscreen of 1st Embodiment of this invention has. It is a top view which shows the wiring formed on the transparent substrate, the 1st detection electrode, and the 2nd detection electrode in order to form a touch panel. It is a top view which shows the wiring, 1st sensing electrode, 2nd sensing electrode, interlayer insulation layer, and bridge wiring which were formed on the transparent substrate in order to form a touch panel.
- radiation irradiated upon exposure includes visible light, ultraviolet light, far ultraviolet light, X-rays, charged particle beams, and the like.
- the touch panel of embodiment of this invention is a touch panel which has a metal wiring and the cured film which covers at least one part of the metal wiring. That is, the touch panel of the present embodiment has detection electrodes for detecting a touch operation such as an operator's finger on the substrate. And the touch panel of this embodiment has the wiring electrically connected to a detection electrode, The wiring is the metal wiring formed using the metal material.
- the wiring connected to the detection electrode includes a wiring for routing the detection electrode to the end portion of the touch panel substrate, and includes a wiring for connecting portions of the separated detection electrodes. .
- the touch panel of this embodiment has a cured film that covers at least a part of the metal wiring.
- the touch panel of this embodiment can be a capacitive touch panel.
- FIG. 1 is a plan view showing an example of a touch panel according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line B-B ′ of FIG.
- the touch panel 21 of the present embodiment includes a first detection electrode 23 extending in the X direction and a second detection electrode extending in the Y direction orthogonal to the X direction on the surface of the transparent substrate 22. 24.
- the transparent substrate 22 can be a glass substrate.
- the transparent substrate 22 can also be a resin substrate.
- a polyethylene terephthalate film, a polybutylene terephthalate film, a polyethylene film, a polypropylene film, a polyethersulfone film, a polycarbonate film, a polyacryl film, a polyvinyl chloride film, A polyimide film, a ring-opened polymer film of cyclic olefin, a film made of a hydrogenated product thereof, and the like can be used.
- the thickness of the transparent substrate 22 can be 0.1 mm to 3 mm in the case of a glass substrate. In the case of a resin substrate, the thickness can be 10 ⁇ m to 3000 ⁇ m.
- a plurality of first detection electrodes 23 and second detection electrodes 24 are arranged.
- the first detection electrodes 23 and the second detection electrodes 24 are arranged in a matrix in the operation area of the touch panel 21.
- the first detection electrode 23 is used to detect the coordinate in the Y direction of the touch position by the operator.
- the second detection electrode 24 is used to detect the coordinate in the X direction of the touch position by the operator.
- the first detection electrode 23 and the second detection electrode 24 are provided in the same layer on the same surface of the transparent substrate 22.
- the number of the first detection electrodes 23 and the second detection electrodes 24 is not limited to the example shown in FIG. 1, but is preferably determined according to the size of the operation area and the required touch position detection accuracy. . That is, the touch panel 21 can be configured by using a larger number or a smaller number of the first detection electrodes 23 and the second detection electrodes 24.
- each of the first detection electrode 23 and the second detection electrode 24 includes a plurality of rhomboid electrode pads 30.
- the first detection electrode 23 and the second detection electrode 24 are arranged such that the electrode pad 30 of the first detection electrode 23 is separated from the electrode pad 30 of the second detection electrode 24 adjacent thereto. At this time, the gap between the electrode pads 30 is very small enough to ensure insulation.
- the electrode pads 30 constituting the first detection electrode 23 and the second detection electrode 24 are arranged over the entire operation area of the touch panel 21.
- the electrode pad 30 may have a rhombus shape, but is not limited to such a shape, and may be a polygonal shape such as a hexagon, for example.
- Each of the first detection electrode 23 and the second detection electrode 24 is preferably a transparent electrode.
- the transparent electrode is an electrode having high transparency to visible light.
- an electrode made of a transparent conductive material such as an electrode made of ITO or an electrode made of indium oxide and zinc oxide can be used.
- the thickness thereof is preferably 10 nm to 100 nm so as to ensure sufficient conductivity.
- the first detection electrode 23 and the second detection electrode 24 can be formed using a known method.
- a film made of a transparent conductive material such as ITO is formed using a sputtering method or the like, and photolithography is performed. This can be done by patterning using a method or the like.
- the first detection electrode 23 and the second detection electrode 24 are formed on the same surface of the transparent substrate 22 and form the same layer. Therefore, the first detection electrode 23 and the second detection electrode 24 intersect at a plurality of locations in the operation region, and form an intersection 28.
- the first detection electrode 23 and the second detection electrode 24 are divided so as not to contact the other. That is, the first detection electrode 23 is connected at the intersection 28, but the second detection electrode 24 extending in the left-right direction in FIG. 2 is divided and formed.
- a bridge wiring 32 is provided to electrically connect the disconnected portion of the second detection electrode 24.
- An interlayer insulating film 29 made of an insulating material is provided between the bridge wiring 32 and the first detection electrode 23.
- the interlayer insulating film 29 provided on the first detection electrode 23 at the intersection 28 is formed of a material having excellent light transmittance.
- the interlayer insulating film 29 can be formed by coating using a printing method such as polysiloxane, acrylic resin, and acrylic monomer, patterning as necessary, and then heat-curing it.
- the interlayer insulating film 29 is an inorganic insulating layer made of silicon oxide (SiO 2 ).
- the interlayer insulating film 29 is an organic insulating layer made of resin.
- the SiO 2 film is formed only on the first detection electrodes 23 at the intersections 28 by a sputtering method using a mask to form the interlayer insulating film 29. You can also
- a bridge wiring 32 is provided in the upper layer of the interlayer insulating film 29, a bridge wiring 32 is provided.
- the bridge wiring 32 fulfills the function of electrically connecting the second detection electrodes 24 that are interrupted at the intersection 28.
- the bridge wiring 32 is preferably formed of a material having excellent light transmittance such as ITO.
- the bridge wiring 32 can be configured by using a metal material having excellent resistance characteristics to be a metal wiring. By making the bridge wiring 32 a metal wiring having excellent resistance characteristics, the line width can be reduced and the operator of the touch panel 21 can be made inconspicuous.
- the second detection electrode 24 can be electrically connected in the Y direction by providing the bridge wiring 32.
- the first detection electrode 23 and the second detection electrode 24 have a shape in which a plurality of rhomboid electrode pads 30 are arranged vertically or horizontally as described above.
- the connection portion located at the intersection 28 has a shape narrower than the rhomboid electrode pad 30 of the first detection electrode 23.
- the bridge wiring 32 is also narrower than the rhombic electrode pad 30 and is formed in a strip shape.
- Terminals are provided at the ends of the first detection electrode 23 and the second detection electrode 24 of the touch panel 21, and wirings 31 are drawn from the terminals, respectively.
- FIG. 3 is a cross-sectional view schematically showing the wiring structure of the touch panel according to the first embodiment of the present invention.
- the wiring 31 is a metal wiring.
- the wiring 31 is preferably a metal wiring containing copper and a second metal element other than copper.
- the second metal element is lithium, germanium, strontium, tin, barium, praseodymium, neodymium, phosphorus, manganese, magnesium, calcium, nickel, zinc, silicon, aluminum, beryllium, gallium, indium, iron, titanium, It is preferably at least one selected from the group consisting of vanadium, cobalt, zirconium and hafnium, and more preferably manganese.
- the wiring 31 includes a first layer 41 containing copper and a second metal other than copper so as to cover at least a part of the surface of the first layer 41. It is preferable to have the configured second layer 42.
- the first layer 41 of the wiring 31 is preferably made of copper or a copper alloy. More preferably, the second layer 42 of the wiring 31 includes an oxide of the second metal element other than copper and covers at least a part of the first layer 41. More preferably, at least a part of the surface of the first layer 41 is covered with an oxide containing a metal as a main component.
- the second layer 42 covers the entire surface of the first layer 41.
- the structure of the wiring 31 is schematically shown, and the cross-sectional structure is not limited to a rectangular shape.
- the cross-sectional shape of the first layer 41 of the wiring 31 can be a square shape, a trapezoidal shape, a parallelogram shape, or the like, and the second layer 42 can cover the surface of the first layer.
- copper or a copper alloy can be used as a preferable material for forming the first layer 41 in the wiring 31.
- the copper alloy lithium, germanium, strontium, tin, barium, praseodymium, neodymium, phosphorus, manganese, magnesium, calcium, nickel, zinc, silicon, aluminum, beryllium, gallium, indium, iron, titanium, vanadium,
- a copper alloy containing at least one element selected from the group consisting of cobalt, zirconium and hafnium can be given. That is, a preferable material for forming the first layer 41 of the wiring 31 can be copper or an alloy of copper and the second metal element described above.
- a copper alloy containing an element having a diffusion coefficient larger than the self-diffusion coefficient of copper can be exemplified.
- the copper alloy include a copper alloy containing at least one element selected from the group consisting of lithium, germanium, strontium, tin, barium, praseodymium, neodymium, manganese, zinc, manganese, gallium, and indium.
- the addition amount of the additional element in the copper alloy is preferably in the range of 0.1 atom% to 25 atom% with respect to copper. By making the addition amount in the above range, diffusion of the additive element in the copper alloy by heating becomes easy.
- a copper alloy containing manganese that is, a copper-manganese alloy can be given.
- the second layer 42 covering the first layer 41 described above includes an oxide of a metal element, that is, a metal oxide.
- the metal oxide in the second layer 42 preferably contains at least an oxide of a metal other than copper, and more preferably contains an oxide containing the above-described second metal element other than copper. .
- the metal oxide contained in the second layer 42 include lithium, germanium, strontium, tin, barium, praseodymium, neodymium, phosphorus, manganese, magnesium, calcium, nickel, zinc, silicon, and aluminum.
- the wiring 31 having the structure shown in FIG. 3 can be formed by performing a heat treatment after forming a wiring pattern using the copper alloy mentioned as a preferable constituent material of the first layer 41 described above.
- the metal oxide composing the copper alloy is formed on the surface layer of the wiring pattern by heating the wiring pattern made of the copper alloy described above in the presence of oxygen, for example, in the atmosphere. It is done. As a result, a wiring 31 having a first layer 41 made of a copper alloy and containing copper and a second layer 42 containing an oxide of a metal element other than copper and configured to cover the first layer 41 is formed. It is thought that it is done.
- the copper alloy forming the wiring pattern includes lithium, germanium, strontium, tin, barium, praseodymium, neodymium, manganese, zinc, manganese, gallium having a diffusion coefficient larger than the self-diffusion coefficient of copper.
- a copper alloy containing at least one element selected from the group consisting of indium as an additive element is considered preferable.
- the heat treatment can cause the additive element having a diffusion coefficient larger than the self-diffusion coefficient of copper to reach the copper surface quickly and preferentially form an oxide film layer of the additive element on the surface of the copper alloy. It is considered possible.
- the second layer 42 of the wiring 31 of the touch panel 21 is made of an element other than copper, that is, lithium, germanium, strontium, tin, barium, praseodymium, neodymium, manganese, zinc having a diffusion coefficient larger than the self-diffusion coefficient of copper. It is considered that the main component contains a metal oxide of at least one element selected from the group consisting of manganese, gallium and indium.
- the copper-manganese alloy containing manganese which is particularly preferable as described above, is used to form the wiring 31, a wiring pattern made of a copper-manganese alloy is formed on the substrate constituting the touch panel. Thereafter, by performing a heat treatment, the first layer 41 made of copper or a copper-manganese alloy and the second layer 42 containing a metal oxide and configured to cover at least a part of the first layer 41 are provided. It is considered that the wiring 31 is formed. In that case, it is interpreted that the metal oxide included in the first layer 41 can contain an oxide of manganese.
- the above-described copper alloy forming method for forming the wiring 31 is not particularly limited.
- a copper alloy can be formed using a plating method such as an electric field plating method or a dissolution plating method, or a physical vapor deposition method such as a vacuum evaporation method or a sputtering method. And it is thought that an oxide film layer is formed by heat-treating the copper alloy thus formed. Therefore, it is considered that a wiring pattern made of the above-described copper alloy can be obtained by using a known patterning method in combination with the above-described copper alloy forming method, and the wiring 31 can be formed by heat-treating it. It is done.
- the heat treatment temperature of the above-described copper alloy for forming the wiring 31 is preferably in the range of 150 ° C. to 450 ° C., for example, and the heat treatment time is in the range of 2 minutes to 5 hours, for example. It is preferable to do. It is understood that when the heat treatment temperature is less than 150 ° C., it takes time to form an oxide film and the productivity is lowered. On the other hand, when the temperature exceeds 450 ° C., it is understood that there is a concern that other constituent members constituting the touch panel may be adversely affected such as deterioration. Also, if the heat treatment time is less than 2 minutes, the metal oxide film thickness is thin. On the other hand, if the heat treatment time is longer than 5 hours, it takes too much time to form the oxide film, which may reduce the productivity of the touch panel.
- the heat treatment time is in the range of 150 ° C. to 450 ° C., for example, and the heat treatment time is in the range of 2 minutes to 5 hours, for example. It
- the wiring 31 formed as described above includes a first layer 41 containing copper, and a second layer 42 formed to cover the first layer 41 containing the metal oxide formed by the heating described above. It is thought that it has.
- the wiring 31 is understood that the first layer 41 is made of a metal material containing copper, and is interpreted as having excellent resistance characteristics. Further, it is understood that the wiring 31 can exhibit excellent adhesion to the transparent substrate 22 constituting the touch panel 21 by having the second layer 42 formed including a metal oxide.
- the wiring 31 when the wiring 31 is made of a copper-manganese alloy, the wiring 31 includes the oxide of manganese in the second layer 42 and exhibits excellent adhesion with the transparent substrate 22 made of the above-described constituent materials. It is thought that you can.
- the touch panel 21 can narrow the formation region of the wiring 31 and can realize high reliability by suppressing defects such as peeling of the wiring 31 from the transparent substrate 22.
- the touch panel 21 is provided with the bridge wiring 32 that electrically connects the second detection electrodes 24 that are interrupted at the intersection 28.
- the bridge wiring 32 can be formed of a material having excellent light transmittance such as ITO.
- the bridge wiring 32 can be a metal wiring similar to the wiring 31. In that case, the bridge wiring 32 can be formed in the same manner as the wiring 31 by using the above-described copper alloy, similarly to the wiring 31. For example, the bridge wiring 32 can be formed at the same time as the wiring 31 is formed.
- the wiring 31 is connected to an external control circuit (not shown) that detects the position of a voltage application or touch operation to the first detection electrode 23 and the second detection electrode 24 using a connection terminal (not shown) at the end thereof. Electrically connected.
- a light transmissive cured film 25 is disposed on the surface of the transparent substrate 22 on which the first detection electrode 23 and the second detection electrode 24 are disposed so as to cover the wiring 31. ing. Similarly, the cured film 25 is disposed so as to cover the first detection electrode 23 and the second detection electrode 24. Therefore, when the bridge wiring 32 is a metal wiring similar to the wiring 31, the cured film 25 can cover the bridge wiring 32 that is a metal wiring together with the wiring 31.
- the cured film 25 is formed by patterning so as to cover and protect the wiring 31 in the wiring formation region of the touch panel 21 and to cover and protect the first detection electrode 23 and the second detection electrode 24 in the operation region.
- the insulating film 25 is formed by patterning so that connection terminals (not shown) at the ends of the wirings 31 drawn from the first detection electrode 23 and the second detection electrode 24 are exposed.
- the cured film 25 functions as a protective film that covers the wiring 31, the first detection electrode 23, and the second detection electrode 24. Therefore, high reliability can be realized by suppressing the peeling of the wiring 31 from the transparent substrate 22. In addition, it is possible to achieve high reliability by suppressing deterioration of the first detection electrode 23 and the second detection electrode 24.
- the radiation-sensitive resin composition of the embodiment of the present invention can be used for the formation of the cured film 25, the radiation-sensitive resin composition of the embodiment of the present invention can be used. Then, predetermined patterning can be performed and disposed on at least a part of the wiring 31 and on the first detection electrode 23 and the second detection electrode 24.
- the radiation sensitive resin composition of the embodiment of the present invention for forming the cured film 25 will be described in detail later.
- the radiation-sensitive resin composition of the embodiment of the present invention is applied onto at least a part of the wiring 31 that is a metal wiring, cured, and becomes a cured film for covering and protecting it. At this time, the radiation-sensitive resin composition of the embodiment of the present invention does not cause defects such as corrosion of the wiring 31 that is a metal wiring, and forms the cured film 25 as a protective film of the wiring 31. Can do.
- the touch panel 21 is made of a transparent resin using, for example, an adhesive layer (not shown) made of an acrylic transparent adhesive on the formation surface of the wiring 31 of the transparent substrate 22 and the first detection electrode 23 and the second detection electrode 24.
- a cover film (not shown) can be provided.
- the touch panel 21 having the above configuration measures capacitance in an operation region in which the first detection electrodes 23 and the second detection electrodes 24 are arranged in a matrix, and when there is a touch operation such as an operator's finger.
- the contact position of a finger or the like can be detected from the change in capacitance that occurs.
- the touch panel 21 is connected via a wiring 31 that is electrically connected to the first detection electrode 23 and the second detection electrode 24, and is placed on a display such as a liquid crystal display element or an organic EL element. It can be suitably used as an input device for the display.
- the cured film of the present embodiment that protects wiring and the like is an important component.
- FIG. ⁇ Radiation sensitive resin composition> As described above, the cured film of the touch panel according to the first embodiment of the present invention is arranged so as to cover the detection electrode and the wiring on the touch panel substrate on which the wiring made of metal is arranged, and to cover the detection electrode. Is done.
- the radiation sensitive resin composition of 2nd Embodiment of this invention is a radiation sensitive resin composition suitable for formation of the cured film of this touch panel.
- the cured film formed from the radiation-sensitive resin composition of the second embodiment of the present invention is less likely to be reduced by manganese or the like, and therefore can maintain adhesion with metal wiring at a high level.
- the radiation-sensitive resin composition according to the second embodiment of the present invention comprises (A) a photosensitizer (sometimes simply referred to as component (A)), (B) an alkoxysilyl group-containing compound, and the compound. At least one of the hydrolyzed condensates (sometimes simply referred to as the component (B) or the compound (B)). And it is preferable to contain (C) alkali-soluble resin (it may only be called (C) component) other than (A) component and (B) component.
- a photosensitizer sometimes simply referred to as component (A)
- B an alkoxysilyl group-containing compound
- At least one of the hydrolyzed condensates sometimes simply referred to as the component (B) or the compound (B)
- C alkali-soluble resin
- the radiation-sensitive resin composition of the second embodiment of the present invention can contain any component in addition to the components (A) to (C) as long as the effects of the present invention are not impaired.
- the radiation-sensitive resin composition of the present embodiment comprises (D) an antioxidant (sometimes simply referred to as (D) component), (E) a polyfunctional monomer (simply referred to as (E) component). And (F) inorganic oxide particles (sometimes simply referred to as the component (F)).
- an antioxidant sometimes simply referred to as (D) component
- E a polyfunctional monomer
- F inorganic oxide particles
- the component (A), the photosensitive agent (A), is a photosensitive material that generates reactive active species upon exposure.
- A) As a photosensitive agent it is preferable that at least one of a photo-acid generator and a photoinitiator is included, for example.
- a preferable photoacid generator as a photosensitizer is a compound that generates an acid upon irradiation with radiation.
- the radiation for example, visible light, ultraviolet light, far ultraviolet light, electron beam (charged particle beam), X-ray or the like can be used.
- the radiation sensitive resin composition of this embodiment contains a photoacid generator as the component (A)
- the radiation sensitive resin composition of this embodiment can exhibit positive radiation sensitive characteristics.
- the photoacid generator preferable as the photosensitizer is not particularly limited as long as it is a compound that generates an acid (for example, carboxylic acid, sulfonic acid, etc.) by irradiation with radiation.
- the content of the photoacid generator in the radiation-sensitive resin composition of the present embodiment may be the form of a photoacid generator that is a compound as described later, or (C) an alkali-soluble resin or other as described later. It may be in the form of a photoacid generating group incorporated as part of the resin, or both of these forms.
- oxime sulfonate compound As said oxime sulfonate compound, the compound containing the oxime sulfonate group represented by following formula (1) is preferable.
- R 21 is an alkyl group, a cycloalkyl group or an aryl group, and part or all of the hydrogen atoms of these groups may be substituted with a substituent.
- the alkyl group for R 21 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms.
- the alkyl group of R 21 includes an alkoxy group having 1 to 10 carbon atoms or an alicyclic group (including a bridged alicyclic group such as a 7,7-dimethyl-2-oxonorbornyl group, preferably a bicycloalkyl group). Group) and the like.
- the aryl group for R 21 is preferably an aryl group having 6 to 11 carbon atoms, and more preferably a phenyl group or a naphthyl group.
- the aryl group of R 21 may be substituted with an alkyl group having 1 to 5 carbon atoms, an alkoxy group, or a halogen atom.
- a more preferable compound may be an oxime sulfonate compound represented by the following formula (2).
- R ⁇ 21 > is synonymous with description of R ⁇ 21 > in said formula (1).
- X is an alkyl group, an alkoxy group, or a halogen atom.
- m1 is an integer of 0 to 3. When m1 is 2 or 3, the plurality of X may be the same or different.
- the alkyl group as X is preferably a linear or branched alkyl group having 1 to 4 carbon atoms.
- the alkoxy group as X is preferably a linear or branched alkoxy group having 1 to 4 carbon atoms.
- the halogen atom as X is preferably a chlorine atom or a fluorine atom.
- m is preferably 0 or 1.
- a compound in which m1 is 1, X is a methyl group, and the substitution position of X is ortho is preferable.
- oxime sulfonate compound described above include, for example, compounds (3-i), (3-ii), and (3-iii) represented by the following formulas (3-i) to (3-v), respectively. ), Compound (3-iv), compound (3-v) and the like.
- Onium salt examples of the onium salt include diphenyliodonium salt, triphenylsulfonium salt, sulfonium salt, benzothiazonium salt, tetrahydrothiophenium salt, and sulfonimide compound.
- sulfonimide compound examples include N- (trifluoromethylsulfonyloxy) succinimide, N- (camphorsulfonyloxy) succinimide, N- (4-methylphenylsulfonyloxy) succinimide, N- (2-trifluoromethyl).
- photoacid generators As other photoacid generators, the photoacid generators described in JP2011-215503A can be used.
- the radiation sensitivity From the viewpoint of solubility, an oxime sulfonate compound is preferable, and a compound containing an oxime sulfonate group represented by the above formula (1) is more preferable.
- the oxime sulfonate compound represented by the said Formula (2) can be mentioned as a still more preferable thing.
- the (A) photoacid generator is also preferably an onium salt, more preferably a tetrahydrothiophenium salt and a benzylsulfonium salt, and 4,7-di-n-butoxy-1-naphthyltetrahydrothiophenium trifluoromethane. Sulfonate and benzyl-4-hydroxyphenylmethylsulfonium hexafluorophosphate are particularly preferred.
- the photoacid generator is any one of an oxime sulfonate compound, an onium salt, a sulfonimide compound, a halogen-containing compound, a diazomethane compound, a sulfone compound, a sulfonic acid ester compound, and a carboxylic acid ester compound. You may use individually, and may mix and use 2 or more types.
- the photoacid generator is one of an oxime sulfonate compound, an onium salt, a sulfonimide compound, a halogen-containing compound, a diazomethane compound, a sulfone compound, a sulfonic acid ester compound, and a carboxylic acid ester compound
- the content of the (A) photoacid generator in the radiation sensitive resin composition is preferably 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the component (B), and 1 part by mass to 5 parts by mass. Is more preferable.
- the radiation sensitive resin composition of this embodiment contains the alkali-soluble resin of (C) component explained in full detail later
- content of said (A) photo-acid generators such as an oxime sulfonate compound
- content of said (A) photo-acid generators is ( C) 0.1 to 10 parts by weight is preferable with respect to 100 parts by weight of component, and 1 to 5 parts by weight is more preferable.
- the content of the photoacid generator (A) is in the above-described range, the radiation sensitivity of the radiation-sensitive resin composition of the present embodiment can be optimized, exhibiting good patternability, This is suitable for forming the cured film of the embodiment.
- quinonediazide compound In addition to the oxime sulfonate compounds described above, quinonediazide compounds can be cited as preferred photoacid generators as (A) photosensitizers of the radiation sensitive resin composition of the present embodiment. This quinonediazide compound can be particularly preferably used as a photoacid generator.
- the quinonediazide compound is a quinonediazide compound that generates a carboxylic acid upon irradiation with radiation.
- a condensate of a phenolic compound or an alcoholic compound hereinafter referred to as “mother nucleus”
- 1,2-naphthoquinonediazidesulfonic acid halide can be used.
- mother nucleus examples include trihydroxybenzophenone, tetrahydroxybenzophenone, pentahydroxybenzophenone, hexahydroxybenzophenone, (polyhydroxyphenyl) alkane, and other mother nuclei.
- 1,2-naphthoquinone diazide sulfonic acid halide 1,2-naphthoquinone diazide sulfonic acid chloride is preferable.
- 1,2-naphthoquinonediazidesulfonic acid chloride include 1,2-naphthoquinonediazide-4-sulfonic acid chloride, 1,2-naphthoquinonediazide-5-sulfonic acid chloride, and the like. Of these, 1,2-naphthoquinonediazide-5-sulfonic acid chloride is more preferred.
- 1,2-naphthoquinonediazide sulfonic acid halide preferably 30 mol% to the number of OH groups in the phenolic compound or alcoholic compound. 1,2-naphthoquinonediazide sulfonic acid halide corresponding to 85 mol%, more preferably 50 mol% to 70 mol% can be used.
- the condensation reaction can be carried out by a known method.
- quinonediazide compounds include 4,4 ′-[1- [4- [1- [4-hydroxyphenyl] -1-methylethyl] phenyl] ethylidene] bisphenol (1.0 mol) and 1,2-naphtho.
- a condensate of quinonediazide-5-sulfonic acid chloride (2.0 mol) is preferably used.
- quinonediazide compounds can be used alone or in combination of two or more.
- oxime sulfonate compound onium salt, sulfonimide compound, halogen-containing compound, diazomethane compound, sulfone compound, sulfonic acid ester compound and carboxylic acid ester compound described above.
- the content of the quinonediazide compound in the radiation sensitive resin composition of the present embodiment is preferably 5 parts by mass to 100 parts by mass, more preferably 10 parts by mass to 50 parts by mass with respect to 100 parts by mass of the component (B). It is. And when the radiation sensitive resin composition of this embodiment contains the alkali-soluble resin of (C) component explained in full detail later, content of a quinonediazide compound is preferable with respect to 100 mass parts of (C) component. Is 5 to 100 parts by mass, more preferably 10 to 50 parts by mass.
- the difference in solubility between the irradiated portion and the unirradiated portion with respect to the alkaline aqueous solution serving as the developer can be increased, and the patterning performance can be improved.
- the solvent resistance of the cured film obtained using this radiation sensitive resin composition can also be made favorable.
- a photopolymerization initiator (A) that is preferable as a photosensitizer (also referred to as (A) photopolymerization initiator) is a component that generates an active species that is capable of initiating polymerization of a compound having polymerizability in response to radiation.
- photoinitiator photoradical polymerization initiator can be mentioned, for example.
- photopolymerization initiator examples include O-acyloxime compounds, acetophenone compounds, biimidazole compounds, and the like. These compounds may be used alone or in combination of two or more.
- O-acyl oxime compounds as specific examples of photopolymerization initiators include 1,2-octanedione 1- [4- (phenylthio) -2- (O-benzoyloxime)], ethanone-1- [ 9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl] -1- (O-acetyloxime), ethanone-1- [9-ethyl-6- (2-methyl-4-tetrahydrofura) Nylmethoxybenzoyl) -9. H.
- Examples of the acetophenone compound which is a specific example of the photopolymerization initiator (A) described above, include ⁇ -aminoketone compounds and ⁇ -hydroxyketone compounds.
- photopolymerization initiators As these (A) photopolymerization initiators, the photopolymerization initiators described in JP2013-164471A, JP2012-212114A, and JP2010-85929A can be used.
- the photopolymerization initiators exemplified as the photosensitizer can be used alone or in admixture of two or more.
- the content of the photopolymerization initiator exemplified as (A) photosensitizer is preferably 1 part by mass to 40 parts by mass, more preferably 5 parts by mass to 30 parts by mass with respect to 100 parts by mass of component (B). It is. And when the radiation sensitive resin composition of this embodiment contains (C) component alkali-soluble resin explained in full detail later, 1 mass part-40 mass parts are with respect to 100 mass parts of (C) component. Preferably, 5 parts by mass to 30 parts by mass is more preferable. (A) By setting the content of the photopolymerization initiator to 1 to 40 parts by mass, the radiation-sensitive resin composition of this embodiment has high solvent resistance and high hardness even at a low exposure amount. In addition, a cured film having high adhesion can be formed.
- the component (B) contained in the radiation-sensitive resin composition of the present embodiment is at least one of (B) an alkoxysilyl group-containing compound and a hydrolysis condensate of the alkoxysilyl group-containing compound ((B) compound). is there.
- the compound (B) of the radiation sensitive resin composition of the present embodiment contains an alkoxysilyl group in the molecule.
- the alkoxysilyl group can improve adhesion to a metal oxide by hydrolysis and condensation reaction.
- (B) component contained in the radiation sensitive resin composition of this embodiment is between the cured film formed using a radiation sensitive resin composition, and the metal wiring of the touch panel mentioned above, for example. It is thought that adhesion can be improved.
- the radiation sensitive resin composition of this embodiment can provide the cured film excellent in adhesiveness. And especially the cured film which shows the outstanding adhesiveness with respect to the wiring of the touchscreen which is the metal wiring mentioned above can be provided.
- a compound containing a reactive functional group such as a carboxy group, a methacryloyl group, a vinyl group, an amino group, an isocyanate group, or an oxiranyl group and an alkoxysilyl group is preferable.
- the alkoxysilyl group is preferably a trimethoxysilyl group, dimethoxymethylsilyl group, methoxydimethylsilyl group, triethoxysilylsilyl group, diethoxyethylsilyl group, ethoxydiethyl group or the like.
- examples of the compound having a reactive functional group include trimethoxysilylbenzoic acid, ⁇ -methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, vinyltrimethoxysilane, and ⁇ -isocyanatopropyl.
- examples include triethoxysilane, ⁇ -aminopropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and the like.
- a blocked amino group or a blocked isocyanate group in which an amino group or an isocyanate group is protected with a specific protecting group, the protecting group is removed by heating, and the amino group or the isocyanate group is regenerated can be suitably used.
- the compound having a blocked amino group or a blocked isocyanate group and an alkoxysilyl group include 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine and ⁇ -aminopropyltrimethoxysilane.
- Examples include compounds in which the amino group is protected with a trimethylsilyl group, and compounds in which the isocyanate group of ⁇ -isocyanatopropyltriethoxysilane is protected with any of monoethanolamine, diethanolamine, pyrazole, and methyl ethyl ketone oxime.
- hydrolysis-condensation compound of the above-described compound containing an alkoxysilyl group examples include, for example, 1/4 mole of water with respect to 3-methacryloxypropyltrimethoxysilane and 3-methacryloxypropyltrimethoxysilane;
- a compound prepared by charging 05 wt% phosphoric acid into a flask and hydrolyzing and condensing at 60 ° C. can be mentioned.
- the compound which has at least 1 sort (s) of an amino group, a block amino group, an isocyanate group, and a blocked isocyanate group for the (B) component of the radiation sensitive resin composition of this embodiment is preferable.
- the content of the component (B) in the radiation-sensitive resin composition of the present embodiment is preferably 0.1% by mass to 50% by mass in the total mass of the radiation-sensitive resin composition, and will be described later (C).
- the component contains an alkali-soluble resin, it is preferably 1 part by mass to 50 parts by mass, and more preferably 10 parts by mass to 30 parts by mass with respect to 100 parts by mass of the component (C).
- the radiation sensitive resin composition of this embodiment contains (B) component in this range, in the cured film of this embodiment formed using it, the adhesion between the touch panel and the metal wiring is improved. Can be made.
- the alkali-soluble resin (C) component ((C) alkali-soluble resin) that can be contained in the radiation-sensitive resin composition of the present embodiment is a resin that is soluble in an alkaline solvent and has alkali developability. is there.
- alkali-soluble resin considers patterning property in order to form the cured film of a touch panel, if it is resin (polymer) which has alkali developability, there will be no limitation in particular.
- the (C) alkali-soluble resin preferably contains at least one selected from the group consisting of an acrylic resin having a carboxyl group, polyamide and polysiloxane.
- the component (B) is 1 part by mass to 100 parts by mass of the (C) alkali-soluble resin.
- the amount is preferably 50 parts by mass, and more preferably in the range of 10 to 30 parts by mass.
- (A) component when it is any one of an oxime sulfonate compound, onium salt, a sulfonimide compound, a halogen-containing compound, a diazomethane compound, a sulfone compound, a sulfonic acid ester compound, and a carboxylic acid ester compound , (C) 0.1 part by mass to 10 parts by mass is preferable with respect to 100 parts by mass of component, and 1 part by mass to 5 parts by mass is more preferable.
- the component (A) is a quinonediazide compound
- the content thereof is preferably 5 parts by mass to 100 parts by mass and more preferably 10 parts by mass to 50 parts by mass with respect to 100 parts by mass of the component (C).
- the component (A) is a photopolymerization initiator
- the content thereof is preferably 1 part by weight to 40 parts by weight, and more preferably 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the component (C). preferable.
- the acrylic resin having a carboxyl group which is preferable as the alkali-soluble resin, preferably contains a structural unit having a carboxyl group and a structural unit having a polymerizable group. In that case, it is not particularly limited as long as it includes a structural unit having a carboxyl group and a structural unit having a polymerizable group and has alkali developability (alkali solubility).
- the structural unit having a polymerizable group is preferably at least one structural unit selected from the group consisting of a structural unit having an epoxy group and a structural unit having a (meth) acryloyloxy group.
- a structural unit having an epoxy group preferably at least one structural unit selected from the group consisting of a structural unit having an epoxy group and a structural unit having a (meth) acryloyloxy group.
- the acrylic resin having a carboxyl group contains the specific structural unit, a film having excellent surface curability and deep part curability can be formed, and the cured film of the embodiment of the present invention can be formed.
- the structural unit having a (meth) acryloyloxy group is, for example, a method of reacting an epoxy group in a copolymer with (meth) acrylic acid, a (meth) acrylic acid ester having an epoxy group in a carboxyl group in the copolymer
- a method of reacting (meth) acrylic acid ester having an isocyanate group with a hydroxyl group in a copolymer a method of reacting (meth) acrylic acid hydroxy ester at an acid anhydride site in the copolymer, etc. Can be formed.
- a method of reacting a carboxyl group in the copolymer with a (meth) acrylic ester having an epoxy group is preferable.
- the acrylic resin containing a structural unit having a carboxyl group and a structural unit having an epoxy group as a polymerizable group is at least one selected from the group consisting of (C1) an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride (hereinafter, It can be synthesized by copolymerizing “(C1) compound”) and (C2) an epoxy group-containing unsaturated compound (hereinafter also referred to as “(C2) compound”).
- the acrylic resin having a carboxyl group is a structural unit formed from at least one selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic anhydride, and a structural unit formed from an epoxy group-containing unsaturated compound. It becomes a copolymer containing.
- the acrylic resin having a carboxyl group is, for example, copolymerizing a compound (C1) that provides a carboxyl group-containing structural unit and a compound (C2) that provides an epoxy group-containing structural unit in the presence of a polymerization initiator in a solvent. Can be manufactured. Further, (C3) a hydroxyl group-containing unsaturated compound that gives a hydroxyl group-containing structural unit (hereinafter also referred to as “(C3) compound”) may be further added to form a copolymer.
- ((C1) compound) examples include unsaturated monocarboxylic acids, unsaturated dicarboxylic acids, anhydrides of unsaturated dicarboxylic acids, and mono [(meth) acryloyloxyalkyl] esters of polyvalent carboxylic acids.
- Examples of the unsaturated monocarboxylic acid include acrylic acid, methacrylic acid, and crotonic acid.
- Examples of the unsaturated dicarboxylic acid include maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid and the like.
- anhydrides of unsaturated dicarboxylic acids include the anhydrides of the compounds exemplified as the dicarboxylic acid.
- (C1) compounds acrylic acid, methacrylic acid, and maleic anhydride are preferable, and acrylic acid, methacrylic acid, and maleic anhydride are more preferable from the viewpoint of copolymerization reactivity, solubility in an alkaline aqueous solution, and availability.
- These (C1) compounds may be used alone or in admixture of two or more.
- the use ratio of the (C1) compound is preferably 5% by mass to 40% by mass based on the total of the (C1) compound and the (C2) compound (optional (C3) compound and (C4) compound as necessary). 10% by mass to 25% by mass is more preferable.
- (C1) By using the compound in a proportion of 5% by mass to 30% by mass, it is possible to optimize the solubility of the acrylic resin having a carboxyl group in an alkaline aqueous solution and to form a film having excellent radiation sensitivity. .
- the compound is an epoxy group-containing unsaturated compound.
- the epoxy group include an oxiranyl group (1,2-epoxy structure) or an oxetanyl group (1,3-epoxy structure).
- Examples of the unsaturated compound having an oxiranyl group include glycidyl acrylate, glycidyl methacrylate, 2-methylglycidyl methacrylate, 3,4-epoxybutyl acrylate, 3,4-epoxybutyl methacrylate, and 6,7 acrylic acid.
- Epoxy heptyl methacrylic acid 6,7-epoxy heptyl, ⁇ -ethylacrylic acid-6,7-epoxy heptyl, o-vinyl benzyl glycidyl ether, m-vinyl benzyl glycidyl ether, p-vinyl benzyl glycidyl ether, methacrylic acid 3 , 4-epoxycyclohexylmethyl and the like.
- glycidyl methacrylate, 2-methylglycidyl methacrylate, -6,7-epoxyheptyl methacrylate, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, 3, methacrylate 4-Epoxycyclohexyl, 3,4-epoxycyclohexyl acrylate, and the like are preferable from the viewpoint of improving copolymerization reactivity and solvent resistance of an insulating film and the like.
- an unsaturated compound having an oxetanyl group for example, 3- (acryloyloxymethyl) oxetane, 3- (acryloyloxymethyl) -2-methyloxetane, 3- (acryloyloxymethyl) -3-ethyloxetane, 3- (acryloyloxymethyl) -2-phenyloxetane, 3- (2-acryloyloxyethyl) oxetane, 3- (2-acryloyloxyethyl) -2-ethyloxetane, 3- (2-acryloyloxyethyl) -3-ethyloxetane, 3- (2-acryloyloxyethyl) -2 -Acrylic esters such as phenyloxetane; 3- (methacryloyloxymethyl) oxetane, 3- (methacryloyloxymethyl) -2-methyloxetane, 3- (methacryloyloxymethyl)
- (C2) compounds glycidyl methacrylate, 3,4-epoxycyclohexyl methacrylate, and 3- (methacryloyloxymethyl) -3-ethyloxetane are preferable. These (C2) compounds may be used alone or in combination of two or more.
- the use ratio of the compound (C2) is preferably 5% by mass to 60% by mass based on the sum of the compound (C1) and the compound (C2) (optional (C3) compound and (C4) compound as necessary). 10 mass% to 50 mass% is more preferable.
- (C3) compound examples include (meth) acrylic acid ester having a hydroxyl group, (meth) acrylic acid ester having a phenolic hydroxyl group, and hydroxystyrene.
- examples of the acrylic acid ester having a hydroxyl group include 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 5-hydroxypentyl acrylate, and 6-hydroxyhexyl acrylate.
- the proportion of the compound (A3) used is preferably 1% by mass to 30% by mass based on the sum of the compound (C1), the compound (C2) and the compound (C3) (optional (C4) compound if necessary). 5% by mass to 25% by mass is more preferable.
- the (C4) compound is not particularly limited as long as it is an unsaturated compound other than the above (C1) compound, (C2) compound, and (C3) compound.
- Examples of the (C4) compound include methacrylic acid chain alkyl ester, methacrylic acid cyclic alkyl ester, acrylic acid chain alkyl ester, acrylic acid cyclic alkyl ester, methacrylic acid aryl ester, acrylic acid aryl ester, and unsaturated dicarboxylic acid diester. , Maleimide compounds, unsaturated aromatic compounds, conjugated dienes, unsaturated compounds having a tetrahydrofuran skeleton, and other unsaturated compounds.
- (C4) compounds may be used alone or in admixture of two or more.
- the use ratio of the (C4) compound is preferably 10% by mass to 80% by mass based on the total of the (C1) compound, the (C2) compound, and the (C4) compound (and any (C3) compound).
- Examples of the (C) alkali-soluble resin include polymers having as a main component a structure represented by the following general formula (M-1).
- the polymer having the structure represented by the general formula (M-1) as a main component can be a polymer having an imide ring, an oxazole ring or other cyclic structures by heating or an appropriate catalyst.
- Polyamide acid or polyamic acid ester of polyimide precursor, or polyhydroxyamide of polybenzoxazole precursor is preferable. Due to the annular structure, the heat resistance and solvent resistance are dramatically improved.
- the main component means that n structural units of the structure represented by the general formula (M-1) have 50 mol% or more of all the structural units of the polymer. It is preferable to contain 70 mol% or more, and it is more preferable to contain 90 mol% or more.
- R 1 represents a divalent to octavalent organic group having 2 or more carbon atoms and represents an acid structural component.
- acids in which R 1 is divalent include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, diphenyl ether dicarboxylic acid, naphthalenedicarboxylic acid, and bis (carboxyphenyl) propane, and aliphatic dicarboxylic acids such as cyclohexanedicarboxylic acid and adipic acid.
- Etc examples of the acid in which R 1 is trivalent include tricarboxylic acids such as trimellitic acid and trimesic acid.
- acids in which R 1 is tetravalent include pyromellitic acid, benzophenonetetracarboxylic acid, biphenyltetracarboxylic acid, diphenylethertetracarboxylic acid, diphenylsulfonetetracarboxylic acid, and other aromatic tetracarboxylic acids, butanetetracarboxylic acid, and cyclopentane.
- acids in which R 1 is tetravalent include pyromellitic acid, benzophenonetetracarboxylic acid, biphenyltetracarboxylic acid, diphenylethertetracarboxylic acid, diphenylsulfonetetracarboxylic acid, and other aromatic tetracarboxylic acids, butanetetracarboxylic acid, and cyclopentane.
- acids in which R 1 is tetravalent include pyromellitic acid, benzophenonetetracarboxylic acid
- the acid which has hydroxyl groups such as a hydroxyphthalic acid and a hydroxy trimellitic acid, can also be mentioned. Two or more of these acid components can be used, but it is preferable to contain 1 mol% to 40 mol% of a tetracarboxylic acid residue. Moreover, it is preferable that the residue of the acid which has a hydroxyl group is contained 50 mol% or more from the point of the solubility with respect to an alkali developing solution, or a photosensitive point.
- R 1 preferably has an aromatic ring from the viewpoint of heat resistance, and more preferably a trivalent or tetravalent organic group having 6 to 30 carbon atoms.
- R 2 represents a divalent to octavalent organic group having 2 or more carbon atoms and represents a structural component of diamine.
- R 2 preferably has an aromatic ring from the viewpoint of heat resistance.
- diamines include phenylenediamine, diaminodiphenyl ether, aminophenoxybenzene, diaminodiphenylmethane, diaminodiphenylsulfone, bis (trifluoromethyl) benzidine, bis (aminophenoxyphenyl) propane, bis (aminophenoxyphenyl) sulfone, Bis (amino-hydroxy-phenyl) hexafluoropropane, diaminodihydroxypyrimidine, diaminodihydroxypyridine, hydroxy-diamino-pyrimidine, diaminophenol, dihydroxybenzidine, diaminobenzoic acid, diaminoterephthalic acid, hydrogens of these aromatic rings as alkyl groups Or compounds
- R 3 and R 4 in formula (M-1) may be the same or different and each represents hydrogen or a monovalent organic group having 1 to 20 carbon atoms. From the viewpoint of solubility in an alkaline developer and the solution stability of the resulting photosensitive resin composition, it is preferable that 10 mol% to 90 mol% of R 3 and R 4 are each hydrogen. Further, it is more preferable that R 3 and R 4 each contain at least one monovalent hydrocarbon group having 1 to 16 carbon atoms, and the others are hydrogen atoms.
- l and m represent the number of carboxyl groups or ester groups, and represent an integer of 0 to 2. Preferably it is 1 or 2.
- p and q represent an integer of 0 to 4, and p + q> 0.
- n represents the number of repeating structural units of the polymer, and is in the range of 10 to 100,000. If n is less than 10, the solubility of the polymer in an alkaline developer becomes too high, and the contrast between the exposed area and the unexposed area cannot be obtained, and a desired pattern may not be formed.
- n is preferably 1000 or less, and more preferably 100 or less. Further, n is preferably 20 or more from the viewpoint of improving elongation.
- a polysiloxane preferable as the alkali-soluble resin is a polysiloxane having a radical reactive functional group.
- the polysiloxane is not particularly limited as long as it has a radical reactive functional group in the main chain or side chain of a polymer having a siloxane bond. In that case, the polysiloxane can be cured by radical polymerization, and cure shrinkage can be minimized.
- radical reactive functional group examples include unsaturated organic groups such as a vinyl group, ⁇ -methylvinyl group, acryloyl group, methacryloyl group, and styryl group. Among these, those having an acryloyl group or a methacryloyl group are preferable because the curing reaction proceeds smoothly.
- the polysiloxane that is an alkali-soluble resin is preferably a hydrolytic condensate of a hydrolyzable silane compound.
- the hydrolyzable silane compound constituting the polysiloxane includes (s1) a hydrolyzable silane compound represented by the following formula (S-1) (hereinafter also referred to as (s1) compound), and (s2) the following formula (S -2) and a hydrolyzable silane compound (hereinafter also referred to as (s2) compound).
- R 11 is an alkyl group having 1 to 6 carbon atoms.
- R 12 is an organic group containing a radical reactive functional group.
- p is an integer of 1 to 3. However, if R 11 and R 12 is plural, R 11 and R 12 are each, independently.
- R 13 is an alkyl group having 1 to 6 carbon atoms.
- R 14 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a fluorinated alkyl group having 1 to 20 carbon atoms, a phenyl group, a tolyl group, a naphthyl group, an epoxy group, an amino group, or an isocyanate group.
- n is an integer of 0-20.
- q is an integer of 0 to 3. However, if R 13 and R 14 is plural, R 13 and R 14 are each, independently.
- the “hydrolyzable silane compound” is usually hydrolyzed by heating in the temperature range of room temperature (about 25 ° C.) to about 100 ° C. in the presence of a catalyst and excess water. It refers to a compound having a group capable of forming a silanol group or a group capable of forming a siloxane condensate. In the hydrolysis reaction of the hydrolyzable silane compounds represented by the above formulas (S-1) and (S-2), some hydrolyzable groups are not hydrolyzed in the resulting polysiloxane. It may remain in the state.
- the “hydrolyzable group” refers to a group capable of forming a silanol group upon hydrolysis as described above or a group capable of forming a siloxane condensate.
- some hydrolyzable silane compounds have some or all of the hydrolyzable groups in the molecule unhydrolyzed and other hydrolysable groups. It may remain in a monomer state without condensing with the decomposable silane compound.
- the “hydrolysis condensate” means a hydrolysis condensate obtained by condensing some silanol groups of a hydrolyzed silane compound.
- the (s1) compound and the (s2) compound will be described in detail.
- R 11 is an alkyl group having 1 to 6 carbon atoms.
- R 12 is an organic group containing a radical reactive functional group.
- p is an integer of 1 to 3. However, if R 11 and R 12 is plural, R 11 and R 12 are each, independently.
- Examples of the alkyl group having 1 to 6 carbon atoms as R 11 include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, and a butyl group. Among these, a methyl group and an ethyl group are preferable from the viewpoint of easy hydrolysis. As said p, 1 or 2 is preferable from a viewpoint of progress of a hydrolysis condensation reaction, and 1 is more preferable.
- Examples of the organic group having a radical reactive functional group include a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms in which one or more hydrogen atoms are substituted with the above radical reactive functional group, And an aryl group having 6 to 12 carbon atoms and an aralkyl group having 7 to 12 carbon atoms. When a plurality of R 12 are present in the same molecule, these are independent of each other. Further, the organic group represented by R 12 may have a hetero atom. Examples of such an organic group include an ether group, an ester group, and a sulfide group.
- R 13 is an alkyl group having 1 to 6 carbon atoms.
- R 14 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a fluorinated alkyl group having 1 to 20 carbon atoms, a phenyl group, a tolyl group, a naphthyl group, an epoxy group, an amino group, or an isocyanate group.
- n is an integer of 0-20.
- q is an integer of 0 to 3. However, if R 13 and R 14 is each one, the plurality of R 13 and R 14 are each, independently.
- Examples of the alkyl group having 1 to 6 carbon atoms as R 13 include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, and a butyl group. Among these, a methyl group and an ethyl group are preferable from the viewpoint of easy hydrolysis.
- q is preferably 1 or 2 and more preferably 1 from the viewpoint of the progress of the hydrolysis condensation reaction.
- R 14 is an alkyl group having 1 to 20 carbon atoms
- examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, and a sec-butyl group. Group, tert-butyl group and n-pentyl group.
- An alkyl group having 1 to 10 carbon atoms is preferable, and an alkyl group having 1 to 3 carbon atoms is more preferable.
- a silane compound substituted with four hydrolyzable groups a silane compound substituted with one non-hydrolyzable group and three hydrolyzable groups is preferred. More preferred are silane compounds substituted with one non-hydrolyzable group and three hydrolyzable groups.
- Particularly preferred hydrolyzable silane compounds include, for example, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltri-i-propoxysilane, methyltributoxysilane, phenyltrimethoxysilane, tolyltrimethoxysilane, ethyltrisilane.
- Such hydrolyzable silane compounds may be used alone or in combination of two or more.
- the compound (s1) exceeds 5 mol%.
- the exposure sensitivity when forming a cured film is low, and the scratch resistance and the like of the resulting protective film tend to be reduced.
- the conditions for hydrolyzing and condensing the compound (s1) and the compound (s2) include hydrolyzing at least a part of the compound (s1) and the compound (s2) to convert a hydrolyzable group into a silanol group and condensing the compound.
- hydrolyzing and condensing the compound include hydrolyzing at least a part of the compound (s1) and the compound (s2) to convert a hydrolyzable group into a silanol group and condensing the compound.
- Examples of the solvent used for hydrolysis condensation include alcohols, ethers, glycol ethers, ethylene glycol alkyl ether acetates, diethylene glycol alkyl ethers, propylene glycol monoalkyl ethers, propylene glycol monoalkyl ether acetates, propylene glycol monoalkyl ethers.
- Examples include propionates, aromatic hydrocarbons, ketones, and other esters. These solvents can be used alone or in combination of two or more.
- ethylene glycol alkyl ether acetate diethylene glycol alkyl ether, propylene glycol monoalkyl ether, propylene glycol monoalkyl ether acetate, and butyl methoxyacetate are preferred.
- diethylene glycol dimethyl ether diethylene glycol ethyl methyl ether, propylene glycol monomethyl ether acetate.
- Propylene glycol monomethyl ether and butyl methoxyacetate are preferred.
- the hydrolysis condensation reaction is preferably performed in the presence of a catalyst such as an acid catalyst, a base catalyst, or an alkoxide.
- the molecular weight distribution “Mw / Mn” of the hydrolysis-condensation product is preferably 3.0 or less, and more preferably 2.6 or less.
- the (D) antioxidant (D) component contained in the radiation-sensitive resin composition of the present embodiment is a component that suppresses oxidation of the formed cured film.
- the wiring included in the touch panel according to the first embodiment of the present invention includes the first layer containing copper and the oxide of the second metal element other than copper described above, and at least a part of the first layer. And a second wiring layer configured to cover the metal layer. Therefore, when the cured film formed from the radiation sensitive resin composition of the present embodiment is used so as to cover the wiring of the touch panel, it is oxidized by a metal oxide on the wiring surface, such as an oxide of manganese. There is a concern of deterioration. Therefore, in the radiation sensitive resin composition of this embodiment, (D) antioxidant can be contained as (D) component.
- the radiation sensitive resin composition of the present embodiment contains (D) an antioxidant, so that the cured film of the embodiment of the present invention formed by using the antioxidant has the wiring of the touch panel of the embodiment of the present invention. Even if it is used as a covering film, its oxidation can be suppressed and deterioration can be suppressed.
- Examples of the component (D) of the radiation-sensitive resin composition of the present embodiment include phenol-based antioxidants, sulfur-based antioxidants, amine-based antioxidants, and the like, and phenol-based antioxidants are particularly preferable.
- phenolic antioxidants include styrenated phenol, 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-p-ethylphenol, 2 , 4,6-tri-t-butylphenol, butylhydroxyanisole, 1-hydroxy-3-methyl-4-isopropylbenzene, mono-t-butyl-p-cresol, mono-t-butyl-m-cresol, 2, 4-dimethyl-6-t-butylphenol, butylated bisphenol A, 2,2'-methylene-bis- (4-methyl-6-t-butylphenol), 2,2'-methylene-bis- (4-ethyl- 6-t-butylphenol), 2,2′-methylene-bis (4-methyl-6-t-nonylphenol), 2,2′-isobutylidene-bis- (4 -Dimethylphenol), 4,4'-butylidene-bis- (3-methyl-6-tert-
- antioxidants can be used alone or in combination of two or more.
- the content of the antioxidant is preferably 0.1 to 10 parts by mass, particularly preferably 100 parts by mass with respect to a total of 100 parts by mass of the resin components contained in the radiation-sensitive resin composition of the present embodiment. 0.2 parts by mass to 5 parts by mass.
- the radiation-sensitive resin composition of the present embodiment is a radiation-sensitive resin composition having negative photosensitivity. It can be preferably used.
- Polyfunctional monomers include allylated cyclohexyl di (meth) acrylate, 2,5-hexanedi (meth) acrylate, 1,3-butanediol di (meth) acrylate, 1,4-butanediol di (meth) Acrylate, 1,3-butylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) ) Acrylate, 1,10-decanediol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, glycerol di (meth) acrylate, methoxylated cyclohexyl di (meth) acrylate, neo Emissions
- the content of the (E) polyfunctional monomer is 100 in total from the resin components contained in the radiation-sensitive resin composition of the present embodiment in terms of sensitivity to exposure light. It is preferably 10% by weight or more, more preferably in the range of 50% by weight to 150% by weight with respect to parts by weight.
- the radiation-sensitive resin composition of the present embodiment includes (F) Inorganic oxide particles can be contained.
- the inorganic oxide particles (F) that are the component (F) of the radiation-sensitive resin composition of the present embodiment are contained in the radiation-sensitive resin composition, and the electrical insulation of the resulting cured product is maintained. At the same time, it is possible to control the dielectric constant, which is a dielectric characteristic.
- the inorganic oxide particles can also be used for the purpose of controlling the refractive index of the cured film, controlling the transparency of the cured film, suppressing cracks by alleviating curing shrinkage, and improving the surface hardness of the cured film. .
- the inorganic oxide particles (F) of the radiation-sensitive resin composition of the present embodiment are at least selected from the group consisting of silicon, aluminum, zirconium, titanium, zinc, indium, tin, antimony, strontium, barium, cerium, and hafnium. It is an inorganic oxide particle which is an oxide containing one kind of element.
- oxide particles of silicon, zirconium, titanium or zinc are preferable, and silica particles which are oxide particles of silicon, oxide particles of zirconium or titanium and barium titanate (BaTiO 3 ) are particularly preferable. These can be used alone or in combination of two or more.
- the inorganic oxide particles (F) may be composite oxide particles of the above-described elements. Examples of the composite oxide particles include barium titanate and strontium titanate.
- ATO antiy-tin oxide
- ITO indium-tin oxide
- IZO indium-zinc oxide
- these inorganic oxide particles commercially available ones such as Nanotech (registered trademark) manufactured by CI Kasei Co., Ltd. can be used.
- the shape of the inorganic oxide particles is not particularly limited, and may be spherical or amorphous, and may be hollow particles, porous particles, core-shell particles, or the like. Further, the volume average particle diameter of the inorganic oxide particles (F) obtained by the dynamic light scattering method is preferably 5 nm to 200 nm, more preferably 5 nm to 100 nm, and particularly preferably 10 nm to 80 nm. (F) If the volume average particle diameter of the inorganic oxide particles is less than 5 nm, the hardness of the cured film obtained using the radiation-sensitive resin composition may be reduced, or the intended relative dielectric constant may not be expressed. Yes, if it exceeds 200 nm, the haze of the cured film may increase and the transmittance may decrease, and the smoothness of the cured film may deteriorate.
- the amount of the inorganic oxide particles (F) is not particularly limited, but is 1 part by mass to 500 parts by mass with respect to a total of 100 parts by mass of the resin components contained in the radiation sensitive resin composition of the present embodiment. 5 parts by mass to 300 parts by mass is more preferable.
- (F) When the compounding quantity of inorganic oxide particles is less than 1 part by mass, the above-described properties of the resulting cured film cannot be controlled within a desired range. On the other hand, if the blending amount of the (F) inorganic oxide particles exceeds 500 parts by mass, the coatability and the film curability may be reduced, and the haze of the resulting cured film may be increased.
- the radiation-sensitive resin composition of the present embodiment comprises (A) a photosensitizing agent, (B) an alkoxysilyl group-containing compound, and at least one of a hydrolysis condensate of the compound, (C) an alkali-soluble resin, ( D) An antioxidant, (E) a polyfunctional monomer, (F) inorganic oxide particles can be contained, and (G) a solvent and other optional components can be further contained.
- the radiation-sensitive resin composition of the present embodiment contains (F) inorganic oxide particles
- the radiation-sensitive resin composition can be uniformly (F) by further containing a dispersant as the component (G) (F).
- a dispersant as the component (G) (F).
- Inorganic oxide particles can be dispersed, and coating properties can be improved.
- the radiation sensitive resin composition of this embodiment improves the adhesiveness to the board
- a dispersant described in JP 2011-128469 A can be used.
- the solvent which is the component (G) can adjust the radiation sensitive resin composition of the present embodiment to a desired solid content concentration, and can dissolve the component (A) and the component (B) uniformly and stably. In addition, it is preferable that other optional components as the component (C) and the component (G) can be dissolved uniformly and stably. And when the radiation sensitive resin composition of this embodiment contains (F) inorganic oxide particle, the (F) inorganic oxide particle can be uniformly and stably disperse
- Solvents include alcohols such as methanol, ethanol, isopropyl alcohol, butanol and octanol; ethyl acetate, butyl acetate, ethyl lactate, ⁇ -butyrolactone, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3- Esters such as methyl methoxypropionate and ethyl 3-ethoxypropionate; ethers such as ethylene glycol monobutyl ether, propylene glycol monomethyl ether and diethylene glycol monomethyl ether; dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone, etc.
- alcohols such as methanol, ethanol, isopropyl alcohol, butanol and octanol
- ethyl acetate, butyl acetate, ethyl lactate, ⁇ -butyrolactone propy
- a solvent can be used 1 type or in mixture of 2 or more types.
- the surfactant as the component (G) can be added to improve the coating property of the radiation-sensitive resin composition of the present embodiment, reduce coating unevenness, and improve the developability of the radiation irradiated part.
- preferable surfactants include fluorine-based surfactants and silicone-based surfactants.
- a dispersant described in JP 2011-128469 A can be used.
- the blending amount is preferably 0.01 parts by mass to 100 parts by mass in total of the resin components contained in the radiation-sensitive resin composition of the present embodiment.
- the amount is 10 parts by mass, more preferably 0.05 to 5 parts by mass.
- the radiation-sensitive resin composition of the present embodiment is obtained by mixing at least one of the above-described (A) photosensitizer, (B) alkoxysilyl group-containing compound and hydrolysis condensate of the compound at a predetermined ratio. Prepared. Moreover, when (C) alkali-soluble resin contains, it prepares by mixing (A) component, (B) component, and (C) component in a predetermined ratio.
- Embodiment 3 FIG. ⁇ Manufacture of cured film and touch panel>
- the process of forming a cured film using the radiation sensitive resin composition of this Embodiment mentioned above is included as a main process.
- this cured film forming process patterning of the cured film is performed.
- the formation process of the cured film which is the main process will be mainly described, and the manufacturing method of the touch panel of the present embodiment will be described.
- the touch panel manufacturing method of the present embodiment at least the following steps [1] to [3] are included in the following order so that a cured film is formed on the substrate on which the detection electrodes and wirings are arranged. Is preferred.
- Step of forming a coating film of the radiation-sensitive resin composition of the second embodiment of the present invention [2] Step of irradiating at least a part of the coating film formed in step [1]
- step [1] Step of forming coating film of radiation-sensitive resin composition on substrate
- the radiation-sensitive resin composition of the second embodiment of the present invention is applied on the substrate.
- the coated surface is preferably heated (prebaked), and when the solvent is contained in the coating film, the solvent is removed to form the coating film.
- the substrate it is preferable to use a transparent substrate excellent in visible light transmittance.
- the substrate that can be used include a glass substrate and a resin substrate.
- the resin substrate include polyethylene terephthalate film, polybutylene terephthalate film, polyethylene film, polypropylene film, polyethersulfone film, polycarbonate film, polyacryl film, polyvinyl chloride film, polyimide film, and cyclic olefin ring-opening polymer.
- the film etc. which consist of a film and its hydrogenated substance can be mentioned.
- the detection electrode is formed by a known method. That is, after forming a transparent conductive film made of ITO, a transparent conductive film made of indium oxide and zinc oxide, or the like on the above glass substrate or resin substrate using a known method, a photolithography method is used if necessary. It can be formed by etching.
- the wiring on the substrate is formed according to the above-described method. That is, for example, the above-described copper alloy is formed on the substrate using a plating method such as an electric field plating method or a dissolution plating method, or a physical vapor deposition method such as a vacuum evaporation method or a sputtering method.
- a plating method such as an electric field plating method or a dissolution plating method
- a physical vapor deposition method such as a vacuum evaporation method or a sputtering method.
- a wiring pattern made of a copper alloy can be obtained by using a known patterning method in combination with a method for forming a copper alloy, and a wiring can be formed on the substrate by heat-treating it.
- the method for applying the radiation sensitive resin composition is not particularly limited.
- an appropriate method such as a spray method, a roll coating method, a spin coating method (spin coating method), a slit die coating method, a bar coating method, or an ink jet method can be employed.
- a spin coating method or a slit die coating method is particularly preferable.
- the pre-baking conditions vary depending on the type of each component, the blending ratio, etc., but can be preferably about 70 to 120 ° C. for about 1 to 10 minutes.
- step [2] Step of irradiating at least part of coating film
- at least part of the coating film on the substrate formed in step [1] is irradiated with radiation (hereinafter also referred to as exposure). )
- the exposure is usually performed through a photomask having a predetermined pattern suitable for forming a cured film of the touch panel.
- radiation used for exposure include visible light, ultraviolet light, far ultraviolet light, electron beams, and X-rays. Among these radiations, radiation having a wavelength in the range of 190 to 450 nm is preferable, and radiation including ultraviolet light having a wavelength of 365 nm is particularly preferable.
- the exposure dose in step [2] is preferably 100 J / m 2 to 10000 J / m 2 , more preferably 100 J / m 2 to 10000 J / m 2 , as a value obtained by measuring the intensity of radiation at a wavelength of 365 nm with an illuminometer (OAI model 356, manufactured by OAI Optical Associates Inc.). is 500J / m 2 ⁇ 6000J / m 2.
- step [3] Development step In the step [3], by developing the exposed coating film obtained in the step [2], an unnecessary portion (when the coating film of the radiation-sensitive resin composition is a positive type, The portion irradiated with radiation (in the case of the negative type, the portion not irradiated with radiation) is removed to form a predetermined pattern.
- an alkali developer composed of an aqueous solution of an alkali (basic compound) is preferably used.
- alkalis include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium metasilicate, and ammonia; quaternary ammonium salts such as tetramethylammonium hydroxide and tetraethylammonium hydroxide. be able to.
- an appropriate amount of a water-soluble organic solvent such as methanol or ethanol or a surfactant can be added to such an alkaline developer.
- concentration of alkali in the alkali developer is preferably from 0.1% by mass to 5% by mass from the viewpoint of obtaining appropriate developability.
- an appropriate method such as a liquid piling method, a dipping method, a rocking dipping method, a shower method, or the like can be used.
- the development time varies depending on the composition of the radiation sensitive resin composition, but is preferably about 10 seconds to 180 seconds. Following such development processing, for example, washing with running water is performed for 30 seconds to 90 seconds, and then a desired pattern can be formed by, for example, air drying with compressed air or compressed nitrogen.
- the cured film on the substrate formed by the steps [1] to [3] has high transparency and functions to protect the detection electrode and the wiring.
- the cured film may be further cured by exposure as necessary. Further, instead of exposure after development or in combination with exposure, heat treatment at 80 ° C. to 280 ° C. may be performed. By doing so, a cured film with higher strength can be obtained.
- the thickness of the cured film is preferably 0.1 ⁇ m to 8 ⁇ m, more preferably 0.1 ⁇ m to 6 ⁇ m, and still more preferably 0.1 ⁇ m to 4 ⁇ m.
- the cured film formed from the radiation-sensitive resin composition of the present invention is excellent in transparency, and has excellent adhesion to the above-described substrate capable of constituting a touch panel and metal wiring formed on the substrate. ing.
- the touch panel according to the embodiment of the present invention exhibiting high reliability can be manufactured by arranging the detection electrode, the wiring, and the cured film on the light-transmitting substrate.
- TMSPS trimethoxysilyl propyl succinic anhydride
- polysiloxane (B-5) which is a hydrolysis-condensation product of an alkoxysilyl group-containing compound, was obtained.
- the obtained polysiloxane (B-5) was in the state of a solution (polymer solution), the solid content concentration was 30% by weight, the polystyrene equivalent weight average molecular weight (Mw) was 2500, and the molecular weight distribution (dispersion degree). ) (Mw / Mn) was 2.2.
- the solid content concentration of this polymer solution (the ratio of the polymer weight to the total weight of the weight solution; the same applies hereinafter) was 31.0% by weight.
- the alkali-soluble resin (C-1) had a polystyrene equivalent weight average molecular weight (Mw) of 10,000 and a molecular weight distribution (dispersity) (Mw / Mn) of 2.5.
- Synthesis Example 3 (Synthesis of alkali-soluble resin (C-2)) Under a dry nitrogen stream, 29.30 g (0.08 mol) of bis (3-amino-4-hydroxyphenyl) hexafluoropropane (Central Glass), 1,3-bis (3-aminopropyl) tetramethyldisiloxane 1 .24 g (0.005 mol), 3.27 g (0.03 mol) of 3-aminophenol (Tokyo Chemical Industry Co., Ltd.) as an end-capping agent is N-methyl-2-pyrrolidone (hereinafter referred to as NMP). Dissolved in 80 g.
- NMP N-methyl-2-pyrrolidone
- Example 1 To the polymer solution (100 parts by mass in terms of solid content) containing polysiloxane (B-5) obtained in Synthesis Example 1, as component (A), ethanone, 1- [9-ethyl-6- (2-methyl) 3 parts by mass of benzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime) (A-1) were added. Next, diethylene glycol ethyl methyl ether and methyl-3-methoxypropionate (so that the composition ratio is 30/70 (%)) are added so that the solid content concentration is 25% by weight to prepare a radiation-sensitive composition. did.
- Example 2 to Example 9 (A) component, (B) component, (C) component, (D) component and (E) component, and (F) component which is inorganic oxide particle, respectively, the kind and compounding quantity which were described in Table 1
- the radiation-sensitive resin compositions of Examples 2 to 9 were prepared in the same manner as in Example 1 except for using in Example 1.
- Comparative Examples 1 to 3 According to the same method as in Example 1, except that the component (A), the component (C) and the component (E) were used in the types and amounts described in Table 1, respectively, Comparative Examples 1 to 3 A radiation sensitive resin composition was prepared.
- compositions of the radiation-sensitive resin compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 3 are summarized in Table 1, and details of each component (A) to (F) are shown below. Show. Note that “-” in the composition column of Table 1 indicates that the corresponding component was not used.
- the component (B) is abbreviated as (B) an alkoxysilyl group-containing compound or a hydrolysis condensate thereof.
- A Photosensitizer A-1: Ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime) (trade name: IRGACURE) (Registered trademark) OX02, manufactured by BASF)
- A-3 4,4 ′-[1- [4- [1- [4-hydroxyphenyl] -1-methylethyl] phenyl] ethylidene] bisphenol (1.0 mol) and 1,2-naphthoquinonediazide-5 -Condensate of sulfonic acid chloride (2.0 mol)
- B Alkoxysilyl group-containing compound or hydrolysis condensate thereof
- B-1 3-glycidoxypropyltrimethoxysilane (trade name: Silaace (registered trademark) S510, manufactured by JNC)
- B-2 3-isocyanatopropyltrimethoxysilane (trade name: KBE-9007, manufactured by Shin-Etsu Chemical Co., Ltd.)
- B-3 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine (trade name: KBE-9103, manufactured by Shin-Etsu Chemical Co., Ltd.)
- D Antioxidant
- D-1 Thiodiethylene bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (trade name: IRGANOX (registered trademark) 1035, Ciba Specialty Chemicals (Made by company)
- D-3 Tris (2,4-di-tert-butylphenyl) phosphite (trade name: ADK STAB (registered trademark) 2112, manufactured by ADEKA)
- Inorganic oxide particles F-1 ZrO 2 sol (trade name: ID191, manufactured by Teika Co., Ltd.)
- Example 10 Using the radiation-sensitive resin compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 3, cured films were formed as follows, and the characteristics were evaluated and compared.
- Table 1 shows the compositions of the radiation-sensitive resin compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 3, and summarizes the evaluation results of the cured films produced using them. Show.
- the glass substrate on which the cured film was formed was measured for light transmittance in the wavelength range of 400 nm to 800 nm using a spectrophotometer “150-20 type double beam” (manufactured by Hitachi, Ltd.), and each glass substrate was measured.
- the minimum value of light transmittance (also referred to as the minimum light transmittance) in the wavelength range of 400 nm to 800 nm was evaluated. Then, the light transmittance at a wavelength of 400 nm was used as a reference for evaluation, and when the light transmittance at a wavelength of 400 nm was 85% or more, it was determined that the light transmittance characteristics were particularly good.
- the cured films obtained by using the radiation-sensitive resin compositions prepared in Examples 1 to 9 were particularly good because their heat-resistant transparency at a wavelength of 400 nm was 10% or less.
- the cured films obtained using the radiation-sensitive resin compositions prepared in Comparative Examples 1 to 3 each have a heat-resistant transparency at a wavelength of 400 nm of 10% or more, and good heat-resistant transparency is obtained. There wasn't.
- a copper-manganese alloy was prepared by the method described in Japanese Patent No. 4453845, and the obtained copper-manganese alloy was sputtered onto a glass substrate (“Corning 7059” (manufactured by Corning)) as a sputtering target, followed by heating to form a metal electrode. A substrate with a formed thereon was obtained.
- the radiation-sensitive resin compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 3 were applied on the substrate using a spinner, and then pre-baked at 90 ° C. for 2 minutes on a hot plate. A coating film was formed.
- a pressure cooker test 120 ° C., humidity 100%, 4 hours was performed on the substrate on which the cured film was formed.
- the substrate before and after the pressure cooker test was subjected to “JIS K-5400-1990 8.5.3 Adhesive cross-cut tape method” to determine the number of cross-cuts remaining in 100 cross-cuts, and the adhesion of each cured film Sex was evaluated.
- substrate before a pressure cooker test was put together in Table 1 as "adhesion" of each cured film.
- substrate after a pressure cooker test was put together in Table 1 as "adhesiveness after PCT" of each cured film.
- the post-PCT adhesion was determined to be poor when the number of grids remaining in 100 grids was 80 or less.
- the cured films obtained using the radiation-sensitive resin compositions prepared in Examples 1 to 9 have good post-PCT adhesion with a number of grids remaining in 100 grids of 80 or more. However, the cured films obtained using the radiation-sensitive resin compositions prepared in Comparative Examples 1 to 3 were 20 and 0, respectively, both of which were poor.
- Example 10 a touch panel having the same structure as the touch panel 21 of this embodiment illustrated in FIG. 1 was manufactured and evaluated.
- the same components as those in the touch panel of FIG. 1 are denoted by the same reference numerals, and description will be made with reference to FIG.
- the touch panel 21 manufactured in this example has an operation area of 3 cm in length ⁇ 3 cm in width on a transparent substrate 22, is formed of ITO with a film thickness of 30 nm, and extends in the X direction.
- Each of the first detection electrodes 23 and the second detection electrodes 24 extending in the Y direction orthogonal to the X direction has three rows.
- a transparent substrate 22 was first prepared.
- a 0.55 mm-thick glass substrate that is non-alkali glass was used, treated with a surfactant using ultrapure water, and subsequently washed by ultrasonic cleaning treatment.
- a wiring 31 that is a metal wiring was formed on the transparent substrate 22.
- a copper-manganese alloy was prepared by the method described in Japanese Patent No. 4453845, and the prepared copper-manganese alloy was used as a sputtering target. From the copper-manganese alloy with a thickness of 30 nm on the transparent substrate 22 by a sputtering method. A metal film was formed. Subsequently, using a positive photosensitive material, a wiring pattern made of a copper alloy was formed in a wiring region outside the operation region by photolithography. Next, the wiring pattern on the transparent substrate 22 is heat-treated at 300 ° C. for 5 minutes in an air atmosphere using an oven to have a first layer made of a copper-manganese alloy and a second layer containing a manganese oxide. A wiring 31 was formed.
- ITO in order to form the first detection electrode 23 and the second detection electrode 24 on the transparent substrate 22 on which the wiring 31 was formed, ITO was formed on the entire surface with a thickness of 30 nm by a sputtering method. Then, using the same positive photosensitive material as that for forming the wiring 31, the first detection electrode 23 and the second detection electrode 24 were formed by photolithography.
- FIG. 4 is a plan view showing the wiring, the first detection electrode, and the second detection electrode formed on the transparent substrate to form the touch panel.
- each of the first detection electrode 23 and the second detection electrode 24 is composed of four rhomboid electrode pads 30. And in the crossing part 28 where the 1st detection electrode 23 and the 2nd detection electrode 24 cross
- an acrylic resin material manufactured by JSR, NN902 number
- a coating film was formed by spin coating on the transparent substrate 22 on which the wiring 31, the first detection electrode 23, and the second detection electrode 24 were formed.
- the solvent component was removed by heating (pre-baking) for 45 seconds on a 90 ° C. hot plate.
- a photomask having a mask pattern for forming the interlayer insulating layer 29 is used, and an exposure amount of 100 mJ is obtained at 365 nm with a PLA-501F exposure machine (extra-high pressure mercury lamp) manufactured by Canon Inc. Exposure processing was performed.
- dip development was performed using an inorganic alkaline solution (CD150-CR, manufactured by JSR) as a developing solution to remove unexposed portions, and then a pattern to be an interlayer insulating layer 29 was formed. Further, the pattern formed on the transparent substrate 22 is cured by heating (post-baking) at 230 ° C. for 1 hour in an oven in an air atmosphere, and a patterned interlayer insulating layer 29 having a thickness of 1.5 ⁇ m is crossed. 28 first detection electrodes 23 were formed.
- an inorganic alkaline solution CD150-CR, manufactured by JSR
- a bridge wiring 32 was formed on the interlayer insulating layer 29 at the intersecting portion 28 in order to electrically connect the disconnected portion of the second detection electrode 24 on the interlayer insulating layer 29.
- ITO in order to form the bridge wiring 32, ITO was used to form a film with a thickness of 50 nm on the entire surface of the substrate by sputtering.
- a positive photosensitive material is used in the same manner as the first detection electrode 23 and the like, and the ITO film is patterned by photolithography to form a plurality of bridge wirings 32 on the interlayer insulating film 29 at the intersection 28 of the touch panel 21. did.
- FIG. 5 is a plan view showing the wiring, the first detection electrode, the second detection electrode, the interlayer insulating layer, and the bridge wiring formed on the transparent substrate to form the touch panel.
- the bridge wiring 32 is provided in order to electrically connect the disconnected portion of the second detection electrode 24.
- An interlayer insulating film 29 is provided between the bridge wiring 32 and the first detection electrode 23.
- Example 5 the entire surface of the substrate was applied using a spinner, and then pre-baked on a hot plate at 90 ° C. for 2 minutes to form a coating film. did.
- the radiation-sensitive resin composition of Example 5 was prepared in the same manner as in Example 1 described above.
- the manufactured touch panel 21 of the present example was placed in a high-temperature and high-humidity tank having a temperature of 85 ° C. and a humidity of 85%, taken out after 240 hours, and peeling between the wiring 31 and cured film 25 The presence or absence of was evaluated. As a result, in the touch panel 21 of the present embodiment, no peeling occurs between the wiring 31 and the cured film 25, the adhesion between the wiring 31 and the cured film 25 is good, and excellent reliability is achieved. I found it.
- the touch panel of the present invention has high reliability. Therefore, the touch panel of the present invention is suitable as an input device for portable information equipment that requires excellent display quality and reliability.
- Touch Panel 22 Transparent Substrate 23 First Detection Electrode 24 Second Detection Electrode 25 Cured Film 28 Intersection 29 Interlayer Insulating Film 30 Electrode Pad 31 Wiring 32 Bridge Wiring 41 First Layer 42 Second Layer
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Abstract
Description
しかし、このような酸化膜である被膜と、有機膜であって銅配線を覆うように設けられた配線の保護膜と間の密着性は低く、外部からの水分が侵入し、銅配線を腐食させる問題があった。
前記金属配線が銅と、銅以外の第2の金属元素を含む金属配線であり、
前記硬化膜は、(A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方を含有する感放射線性樹脂組成物を用いて形成されることを特徴とするタッチパネルに関する。
銅を含む第1層および銅以外の第2の金属元素の酸化物を含み該第1層の少なくとも一部を覆うよう構成された第2層を有する金属配線と、該金属配線の少なくとも一部を覆う硬化膜とを有するタッチパネルの該硬化膜の形成に用いられることを特徴とする感放射線性樹脂組成物に関する。
銅を含む第1層と、銅以外の第2の金属元素の酸化物を含み該第1層の少なくとも一部を覆うよう構成された第2層とを有する金属配線を備えたタッチパネルの該金属配線の少なくとも一部を覆うのに用いられることを特徴とする硬化膜に関する。
尚、本発明において、露光に際して照射される「放射線」には、可視光線、紫外線、遠紫外線、X線および荷電粒子線等が含まれる。
<タッチパネル>
本発明の実施形態のタッチパネルは、金属配線とその金属配線の少なくとも一部を覆う硬化膜とを有するタッチパネルである。すなわち、本実施形態のタッチパネルは、基板上に、操作者の指等のタッチ操作を検出するための検知電極を有する。そして、本実施形態のタッチパネルは、検知電極に電気的に接続する配線を有し、その配線は、金属材料を用い形成された金属配線である。本実施形態のタッチパネルにおいて、検知電極に接続する配線は、検知電極をタッチパネルの基板の端部に引き回すための配線を含み、また、分断された検知電極の部分同士を接続するための配線を含む。さらに、本実施形態のタッチパネルは、金属配線の少なくとも一部を覆う硬化膜を有する。
図1に示すように、電極パッド30は菱形形状とすることができるが、こうした形状に限られず、例えば、六角形等の多角形形状とすることができる。
<感放射線性樹脂組成物>
本発明の第1実施形態のタッチパネルの硬化膜は、上述したように、検知電極および金属からなる配線の配置されたタッチパネルの基板上で、その配線を覆い、また、検知電極を覆うように配置される。本発明の第2実施形態の感放射線性樹脂組成物は、このタッチパネルの硬化膜の形成に好適な感放射線性の樹脂組成物である。
以下、本実施形態の感放射線性樹脂組成物に含有される各成分について説明する。
(A)成分である(A)感光剤は、感光性の材料であって、露光によって反応活性な活性種を生じる材料である。(A)感光剤としては、例えば、光酸発生体および光重合開始剤の少なくとも一方を含むことが好ましい。
(A)感光剤として好ましい光酸発生体は、放射線の照射によって酸を発生する化合物である。ここで、放射線としては、上述したように、例えば、可視光線、紫外線、遠紫外線、電子線(荷電粒子線)、X線等を使用することができる。本実施形態の感放射線性樹脂組成物が(A)成分として光酸発生体を含むことで、本実施形態の感放射線性樹脂組成物はポジ型の感放射線特性を発揮することができる。
上述のオキシムスルホネート化合物としては、下記式(1)で表されるオキシムスルホネート基を含有する化合物が好ましい。
上述のオニウム塩としては、ジフェニルヨードニウム塩、トリフェニルスルホニウム塩、スルホニウム塩、ベンゾチアゾニウム塩、テトラヒドロチオフェニウム塩、スルホンイミド化合物等が挙げられる。
本実施形態の感放射線性樹脂組成物の(A)感光剤として好ましい光酸発生剤は、上述したオキシムスルホネート化合物等の他に、キノンジアジド化合物を挙げることができる。このキノンジアジド化合物は、光酸発生剤として、特に好ましく用いることができる。
(B)成分100質量部に対して、好ましくは、5質量部~100質量部、より好ましくは10質量部~50質量部である。そして、本実施形態の感放射線性樹脂組成物が、後に詳述する(C)成分のアルカリ可溶性樹脂を含有する場合、キノンジアジド化合物の含有量は、(C)成分100質量部に対して、好ましくは5質量部~100質量部、より好ましくは10質量部~50質量部である。キノンジアジド化合物の含有量を上述の範囲とすることで、現像液となるアルカリ水溶液に対する放射線の照射部分と未照射部分との溶解度の差を大きくして、パターニング性能を向上させることができる。また、この感放射性樹脂組成物を用いて得られる硬化膜の耐溶媒性を良好なものとすることもできる。
(A)感光剤として好ましい光重合開始剤((A)光重合開始剤とも言う。)は、放射線に感応して、重合性を備えた化合物の重合を開始し得る活性種を生じる成分である。光重合開始剤としては、例えば、光ラジカル重合開始剤を挙げることができる。
本実施形態の感放射線性樹脂組成物に含有される(B)成分は、(B)アルコキシシリル基含有化合物およびそのアルコキシシリル基含有化合物の加水分解縮合物の少なくとも一方((B)化合物)である。
本実施形態の感放射線性樹脂組成物に含有可能な(C)成分のアルカリ可溶性樹脂((C)アルカリ可溶性樹脂)は、アルカリ性の溶剤に可溶な樹脂であり、アルカリ現像性を有する樹脂である。(C)アルカリ可溶性樹脂は、タッチパネルの硬化膜を形成するためにパターニング性が考慮されるが、アルカリ現像性を有する樹脂(重合体)であれば、特に限定はされない。
(C)アルカリ可溶性樹脂として好ましい、カルボキシル基を有するアクリル樹脂は、カルボキシル基を有する構成単位と重合性基を有する構成単位とを含むものであることが好ましい。その場合、カルボキシル基を有する構成単位と重合性基を有する構成単位とを含み、アルカリ現像性(アルカリ可溶性)を有していれば、特に限定されない。
(C1)化合物としては、不飽和モノカルボン酸、不飽和ジカルボン酸、不飽和ジカルボン酸の無水物、多価カルボン酸のモノ〔(メタ)アクリロイルオキシアルキル〕エステル等が挙げられる。
これらの(C1)化合物は、単独で使用してもよいし、2種以上を混合して使用してもよい。
(C2)化合物は、エポキシ基含有不飽和化合物である。エポキシ基としては、オキシラニル基(1,2-エポキシ構造)またはオキセタニル基(1,3-エポキシ構造)等が挙げられる。
3-(アクリロイルオキシメチル)オキセタン、3-(アクリロイルオキシメチル)-2-メチルオキセタン、3-(アクリロイルオキシメチル)-3-エチルオキセタン、3-(アクリロイルオキシメチル)-2-フェニルオキセタン、3-(2-アクリロイルオキシエチル)オキセタン、3-(2-アクリロイルオキシエチル)-2-エチルオキセタン、3-(2-アクリロイルオキシエチル)-3-エチルオキセタン、3-(2-アクリロイルオキシエチル)-2-フェニルオキセタン等のアクリル酸エステル;
3-(メタクリロイルオキシメチル)オキセタン、3-(メタクリロイルオキシメチル)-2-メチルオキセタン、3-(メタクリロイルオキシメチル)-3-エチルオキセタン、3-(メタクリロイルオキシメチル)-2-フェニルオキセタン、3-(2-メタクリロイルオキシエチル)オキセタン、3-(2-メタクリロイルオキシエチル)-2-エチルオキセタン、3-(2-メタクリロイルオキシエチル)-3-エチルオキセタン、3-(2-メタクリロイルオキシエチル)-2-フェニルオキセタン、3-(2-メタクリロイルオキシエチル)-2,2-ジフルオロオキセタン等のメタクリル酸エステル等が挙げられる。
(C3)化合物としては、水酸基を有する(メタ)アクリル酸エステル、フェノール性水酸基を有する(メタ)アクリル酸エステル、ヒドロキシスチレンが挙げられる。
水酸基を有するアクリル酸エステルとしては、アクリル酸2-ヒドロキシエチル、アクリル酸3-ヒドロキシプロピル、アクリル酸4-ヒドロキシブチル、アクリル酸5-ヒドロキシペンチル、アクリル酸6-ヒドロキシヘキシル等が挙げられる。
(C4)化合物は、上記の(C1)化合物、(C2)化合物および(C3)化合物以外の不飽和化合物であれば、特に制限されるものではない。(C4)化合物としては、例えば、メタクリル酸鎖状アルキルエステル、メタクリル酸環状アルキルエステル、アクリル酸鎖状アルキルエステル、アクリル酸環状アルキルエステル、メタクリル酸アリールエステル、アクリル酸アリールエステル、不飽和ジカルボン酸ジエステル、マレイミド化合物、不飽和芳香族化合物、共役ジエン、テトラヒドロフラン骨格等をもつ不飽和化合物およびその他の不飽和化合物等が挙げられる。
(C)アルカリ可溶性樹脂としては、下記の一般式(M-1)で表される構造を主成分とするポリマーを挙げることができる。一般式(M-1)で表される構造を主成分とするポリマーは、加熱あるいは適当な触媒により、イミド環、オキサゾール環、その他の環状構造を有するポリマーとなり得るものである。好ましくはポリイミド前駆体のポリアミド酸またはポリアミド酸エステル、あるいは、ポリベンゾオキサゾール前駆体のポリヒドロキシアミドである。環状構造となることで、耐熱性、耐溶剤性が飛躍的に向上する。ここで、主成分とは、一般式(M-1)で表される構造のうちのn個の構造単位を、ポリマーの全構造単位の50モル%以上有することを意味する。70モル%以上含有することが好ましく、90モル%以上含有することがより好ましい。
(C)アルカリ可溶性樹脂として好ましいポリシロキサンは、ラジカル反応性官能基を有するポリシロキサンである。ポリシロキサンがラジカル反応性官能基を有するポリシロキサンである場合、シロキサン結合を有する化合物のポリマーの主鎖または側鎖にラジカル反応性官能基を有するものであれば特に限定されるものではない。その場合、ポリシロキサンは、ラジカル重合により硬化させることができ、硬化収縮を最小限に抑えることが可能である。ラジカル反応性官能基としては、例えば、ビニル基、α-メチルビニル基、アクリロイル基、メタクリロイル基、スチリル基等の不飽和有機基が挙げられる。これらのうち、硬化反応が円滑に進むことから、アクリロイル基またはメタクリロイル基を有するものが好ましい。
上記式(S-1)中、R11は炭素数1~6のアルキル基である。R12はラジカル反応性官能基を含む有機基である。pは1~3の整数である。但し、R11およびR12が複数となる場合、複数のR11およびR12はそれぞれ独立している。
上記式(S-2)中、R13は炭素数1~6のアルキル基である。R14は水素原子、炭素数1~20のアルキル基、炭素数1~20のフッ化アルキル基、フェニル基、トリル基、ナフチル基、エポキシ基、アミノ基またはイソシアネート基である。nは0~20の整数である。qは0~3の整数である。但し、R13およびR14がそれぞれ複数となる場合、複数のR13およびR14はそれぞれ独立している。
上記(s1)化合物および(s2)化合物を加水分解縮合させる条件としては、(s1)化合物および(s2)化合物の少なくとも一部を加水分解して、加水分解性基をシラノール基に変換し、縮合反応を起こさせるものである限り特に限定されるものではないが、一例として以下のように実施することができる。
本実施形態の感放射線性樹脂組成物に含有される(D)成分の(D)酸化防止剤は、形成される硬化膜の酸化を抑制する成分となる。
本実施形態の感放射線性樹脂組成物に含有される(E)成分の(E)多官能モノマーは、上述した(A)成分の例である光重合開始剤とともに含有することが好ましい。(A)成分である光重合開始剤と(E)多官能モノマーとを含有することにより、本実施形態の感放射線性樹脂組成物は、ネガ型の感光性を有する感放射線性樹脂組成物として好適に使用することができる。
ペンタエリスリトールトリ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、トリメチロールプロパンPO変性トリ(メタ)アクリレート、トリメチロールプロパンEO変性トリ(メタ)アクリレート、ベンジルメルカプタン(メタ)トリアクリレート、ジトリメチロールプロパンテトラ(メタ)アクリレート、ジペンタエリスリトールモノヒドロキシペンタ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート等の3官能以上の(メタ)アクリレート類;等の多官能(メタ)アクリレートが好ましい。
本実施形態の感放射線性樹脂組成物は、(A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方に加え、任意の成分として、(F)無機酸化物粒子を含有することができる。
本実施形態の感放射線性樹脂組成物は、(A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方に加え、(C)アルカリ可溶性樹脂、(D)酸化防止剤、(E)多官能モノマー、(F)無機酸化物粒子を含有することができ、さらに、(G)溶剤およびその他の任意成分を含有することができる。
本実施形態の感放射線性樹脂組成物は、上述した(A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方を所定の割合で混合することで調製される。また、(C)アルカリ可溶性樹脂が含有される場合、(A)成分、(B)成分および(C)成分を所定の割合で混合することで調製される。
<硬化膜およびタッチパネルの製造>
本発明の第3実施形態であるタッチパネルの製造方法においては、上述した本実施の形態の感放射線性樹脂組成物を用いて硬化膜を形成する工程が主要な工程として含まれる。この硬化膜の形成工程では、硬化膜のパターニングが行われる。以下、主要工程である硬化膜の形成工程を主に説明し、本実施形態のタッチパネルの製造方法について説明する。
[2]工程[1]で形成した塗膜の少なくとも一部に放射線を照射する工程
[3]工程[2]で放射線を照射された塗膜を現像する工程
工程[1]においては、基板上に本発明の第2実施形態の感放射線性樹脂組成物を塗布する。次いで、好ましくは塗布面を加熱(プレベーク)し、塗膜に溶剤が含有される場合にその溶剤を除去して、塗膜を形成する。
工程[2]では、工程[1]で形成された基板上の塗膜の少なくとも一部に、放射線を照射(以下、露光とも言う。)する。この場合、塗膜の一部に露光する際には、通常、タッチパネルの硬化膜形成に好適な所定のパターンを有するフォトマスクを介して露光する。露光に使用される放射線としては、例えば、可視光線、紫外線、遠紫外線、電子線、X線等を使用できる。これらの放射線の中でも、波長が190~450nmの範囲にある放射線が好ましく、特に365nmの紫外線を含む放射線が好ましい。
工程[3]では、工程[2]で得られた露光後の塗膜を現像することにより、不要な部分(感放射線性樹脂組成物の塗膜がポジ型の場合は、放射線の照射部分。ネガ型の場合は、放射線の非照射部分。)を除去して、所定のパターンを形成する。
合成例1(アルコキシシリル基含有化合物またはその加水分解縮合物(B-5)の合成) 撹拌機付の容器内に、プロピレングリコールモノメチルエーテル20重量部を仕込み、続いて、メチルトリメトキシシラン(MTMS)21重量部、テトラエトキシシラン(TEOS)22重量部、3-アクリロキシプロピルトリメトキシシラン(APTMS)12重量部、および、3-(トリメトキシシリル)プロピル無水コハク酸(TMSPS)4重量部(MTMS/TEOS/APTMAS/TMSPS(モル比)=50/30/15/5)を仕込み、溶液温度が60℃になるまで加熱した。溶液温度が60℃に到達後、リン酸0.1重量部、イオン交換水20重量部を仕込み、75℃になるまで加熱し、3時間保持した。次いで、45℃に冷却後、脱水剤としてオルト蟻酸メチル29重量部を加え、1時間攪拌した。さらに、溶液温度を40℃にし、温度を保ちながらエバポレーションすることで、イオン交換水および加水分解縮合で発生したメタノールを除去した。以上により、アルコキシシリル基含有化合物の加水分解縮合物であるポリシロキサン(B-5)を得た。得られたポリシロキサン(B-5)は溶液(重合体溶液)の状態であって固形分濃度は30重量%であり、ポリスチレン換算重量平均分子量(Mw)は2500であり、分子量分布(分散度)(Mw/Mn)は2.2であった。
合成例2(アルカリ可溶性樹脂(C-1)の合成)
冷却管および攪拌機を備えたフラスコに、2,2’-アゾビス(2,4-ジメチルバレロニトリル)7重量部およびジエチレングリコールエチルメチルエーテル220重量部を仕込んだ。引き続きメタクリル酸20重量部、メタクリル酸グリシジル20重量部、スチレン30重量部、N-シクロヘキシルマレイミド30重量部、およびα-メチルスチレンダイマー7重量部を仕込み窒素置換した後、ゆるやかに撹拌を始めた。溶液の温度を70℃に上昇し、この温度を5時間保持することにより、共重合体としてアルカリ可溶性樹脂(C-1)を含む重合体溶液を得た。
乾燥窒素気流下、ビス(3-アミノ-4-ヒドロキシフェニル)ヘキサフルオロプロパン(セントラル硝子社)29.30g(0.08モル)、1,3-ビス(3-アミノプロピル)テトラメチルジシロキサン1.24g(0.005モル)、末端封止剤として、3-アミノフェノール(東京化成工業社)3.27g(0.03モル)をN-メチル-2-ピロリドン(以下、NMPと言う。)80gに溶解させた。ここにビス(3,4-ジカルボキシフェニル)エーテル二無水物(マナック社)31.2g(0.1モル)をNMP20gとともに加えて、20℃で1時間反応させ、次いで50℃で4時間反応させた。その後、キシレンを15g添加し、水をキシレンとともに共沸しながら、150℃で5時間撹拌した。撹拌終了後、溶液を水3Lに投入して白色沈殿を得た。この沈殿を濾過で集めて、水で3回洗浄した後、80℃の真空乾燥機で20時間乾燥し、アルカリ可溶性樹脂(C-2)を得た。
実施例1
合成例1で得られたポリシロキサン(B-5)を含む重合体溶液(固形分換算で100質量部)に、(A)成分としてエタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(O-アセチルオキシム)(A-1)3質量部を加えた。次いで、固形分濃度が25重量%となるようにジエチレングリコールエチルメチルエーテルおよびメチル-3-メトキシプロピオネート(組成比30/70(%)となるように)を加え、感放射線性組成物を調製した。
(A)成分、(B)成分、(C)成分、(D)成分および(E)成分、並びに、無機酸化物粒子である(F)成分を、それぞれ表1に記載された種類と配合量で使用した以外は、実施例1と同様の方法に従い、実施例2~実施例9の感放射線性樹脂組成物を調製した。
(A)成分、(C)成分および(E)成分を、それぞれ表1に記載された種類と配合量で使用した以外は、実施例1と同様の方法に従い、比較例1~比較例3の感放射線性樹脂組成物を調製した。
A-1:エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(O-アセチルオキシム)(商品名:IRGACURE(登録商標) OX02、BASF社製)
A-2:2-(オクチルスルホニルオキシイミノ)-2-(4-メトキシフェニル)アセトニトリル(BASF社の「CGI-725」)
A-3:4,4’-[1-[4-[1-[4-ヒドロキシフェニル]-1-メチルエチル]フェニル]エチリデン]ビスフェノール(1.0モル)と1,2-ナフトキノンジアジド-5-スルホン酸クロリド(2.0モル)の縮合物
B-1:3-グリシドキシプロピルトリメトキシシラン(商品名:サイラエース(登録商標)S510、JNC社製)
B-2:3-イソシアネートプロピルトリメトキシシラン(商品名:KBE-9007、信越化学工業社製)
B-3:3-トリエトキシシリル-N-(1,3-ジメチル-ブチリデン)プロピルアミン(商品名:KBE-9103、信越化学工業社製)
B-4:γ-メタクリロキシプロピルトリメトキシシランの加水分解縮合物
B-5:MTMS/TEOS/APTMS/TMSPS=50/30/15/5モル%の加水分解縮合物
C-1:合成例2で得られたメタクリル酸/メタクリル酸グリシジル/スチレン/N-シクロヘキシルマレイミド=20/20/30/30wt%の共重合体
C-2:合成例3で得られた樹脂
D-1:チオジエチレン ビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート](商品名:IRGANOX(登録商標) 1035、チバ・スペシャリティ・ケミカルズ社製)
D-2:ペンタエリスリトール=テトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート](商品名:IRGANOX(登録商標) 1010、チバ・スペシャリティ・ケミカルズ社製)
D-3:トリス(2,4-ジ-tert-ブチルフェニル)ホスファイト(商品名:アデカスタブ(登録商標)2112、ADEKA社製)
E-1:ジペンタエリスリトールヘキサアクリレートとジペンタエリスリトールペンタアクリレートの混合物(モル比50/50)(商品名:DPHA、日本化薬社製)
F-1:ZrO2ゾル(商品名:ID191、テイカ(株)社製)
実施例10
実施例1~実施例9および比較例1~比較例3で調製した感放射線性樹脂組成物を使用し、以下のように硬化膜を形成し、特性の評価およびその比較を行った。
ガラス基板(「コーニング7059」(コーニング社製))に、実施例1~実施例9および比較例1~比較例3で調製した感放射線性樹脂組成物を、スピンナを用いて塗布した後、ホットプレート上で90℃にて2分間プレベークして塗膜を形成した。次いで、キヤノン(株)製PLA-501F露光機(超高圧水銀ランプ)を用い露光を行い、0.4質量%としたテトラメチルアンモニウムヒドロキシド水溶液を用いて現像を行った。さらに230℃で30分加熱することで膜厚2.0μmの硬化膜を得た。この硬化膜が形成されたガラス基板について、分光光度計「150-20型ダブルビーム」((株)日立製作所製)を用いて波長400nm~800nmの範囲の光透過率を測定し、各ガラス基板について、波長400nm~800nmの範囲の光透過率の最低値(最低光透過率とも言う。)を評価した。そして、波長400nmでの光透過率を評価の基準とし、波長400nmの光透過率が85%以上の場合、光透過率特性が特に良好であると判断した。
特許4453845号に記載の方法により銅マンガン合金を作成し、得られた銅マンガン合金をスパッタリングターゲットとして、ガラス基板(「コーニング7059」(コーニング社製))上にスパッタした後、加熱を行い金属電極の形成された基板を得た。その基板上に実施例1~実施例9および比較例1~比較例3で調製した感放射線性樹脂組成物を、スピンナを用いて塗布した後、ホットプレート上で90℃にて2分間プレベークして塗膜を形成した。次いで、キヤノン(株)製PLA-501F露光機(超高圧水銀ランプ)を用い露光を行い、0.4質量%としたテトラメチルアンモニウムヒドロキシド水溶液を用いて現像を行った。さらに、230℃で30分間加熱することで膜厚2.0μmの硬化膜を得た。
実施例10
本実施例では、図1で例示された本実施形態のタッチパネル21と同様の構造を備えたタッチパネルを製造し、評価を行った。尚、以下、本実施例のタッチパネルにおいては、便宜上、図1のタッチパネルと共通する構成要素について同一の符号を付すようにし、図1等を適宜参照しながら説明を行うこととする。
22 透明基板
23 第1検知電極
24 第2検知電極
25 硬化膜
28 交差部
29 層間絶縁膜
30 電極パッド
31 配線
32 ブリッジ配線
41 第1層
42 第2層
Claims (20)
- 金属配線と該金属配線の少なくとも一部を覆う硬化膜とを有するタッチパネルであって、
前記金属配線が銅と、銅以外の第2の金属元素を含む金属配線であり、
前記硬化膜は、(A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方を含有する感放射線性樹脂組成物を用いて形成されることを特徴とするタッチパネル。 - 前記金属配線が、銅を含む第1層と、前記第2の金属元素の酸化物を含み該第1層の少なくとも一部を覆うよう構成された第2層とを有する金属配線である請求項1記載のタッチパネル。
- 前記第2の金属元素は、リチウム、ゲルマニウム、ストロンチウム、スズ、バリウム、プラセオジム、ネオジム、リン、マンガン、マグネシウム、カルシウム、ニッケル、亜鉛、シリコン、アルミニウム、ベリリウム、ガリウム、インジウム、鉄、チタン、バナジウム、コバルト、ジルコニウムおよびハフニウムよりなる群から選ばれる少なくとも1種であることを特徴とする請求項1または2に記載のタッチパネル。
- 前記第2の金属元素が、マンガンであることを特徴とする請求項1~3のいずれか1項に記載のタッチパネル。
- 前記硬化膜が、さらに(C)アルカリ可溶性樹脂を含有する感放射線性樹脂組成物を用いて形成されることを特徴とする請求項1~4のいずれか1項に記載のタッチパネル。
- 前記感放射線性樹脂組成物の(C)成分が、カルボキシル基を有するアクリル樹脂、ポリアミドおよびポリシロキサンよりなる群から選ばれる少なくとも1種を含むことを特徴とする請求項5に記載のタッチパネル。
- 前記硬化膜が、さらに(D)酸化防止剤を含有する感放射線性樹脂組成物を用いて形成されることを特徴とする請求項1~6のいずれか1項に記載のタッチパネル。
- 前記硬化膜が、さらに(F)ケイ素、アルミニウム、ジルコニウム、チタン、亜鉛、インジウム、スズ、アンチモン、ストロンチウム、バリウム、セリウムおよびハフニウムからなる群より選ばれる少なくとも1種の元素を含む酸化物である無機酸化物粒子を含有する感放射線性樹脂組成物を用いて形成されることを特徴とする請求項1~7のいずれか1項に記載のタッチパネル。
- 前記感放射線性樹脂組成物の(A)成分が、光酸発生体および光重合開始剤の少なくとも一方を含むことを特徴とする請求項1~8のいずれか1項に記載のタッチパネル。
- 前記感放射線性樹脂組成物の(B)成分が、アミノ基、ブロックアミノ基、イソシアネート基およびブロックイソシアネート基の少なくとも1種を有する化合物を含むことを特徴とする請求項1~9のいずれか1項に記載のタッチパネル。
- (A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方を含有してなる感放射線性樹脂組成物であって、
銅を含む第1層および銅以外の第2の金属元素の酸化物を含み該第1層の少なくとも一部を覆うよう構成された第2層を有する金属配線と、該金属配線の少なくとも一部を覆う硬化膜とを有するタッチパネルの該硬化膜の形成に用いられることを特徴とする感放射線性樹脂組成物。 - さらに、(C)アルカリ可溶性樹脂を含むことを特徴とする請求項11に記載の感放射線性樹脂組成物。
- (C)成分が、カルボキシル基を有するアクリル樹脂、ポリアミドおよびポリシロキサンよりなる群から選ばれる少なくとも1種を含むことを特徴とする請求項12に記載の感放射線性樹脂組成物。
- 前記金属配線の第2層に含まれる前記第2の金属元素の酸化物は、リチウム、ゲルマニウム、ストロンチウム、スズ、バリウム、プラセオジム、ネオジム、リン、マンガン、マグネシウム、カルシウム、ニッケル、亜鉛、シリコン、アルミニウム、ベリリウム、ガリウム、インジウム、鉄、チタン、バナジウム、コバルト、ジルコニウムおよびハフニウムよりなる群から選ばれる少なくとも1種の元素の酸化物であることを特徴とする請求項11~13のいずれか1項に記載の感放射線性樹脂組成物。
- さらに、(D)酸化防止剤を含むことを特徴とする請求項11~14のいずれか1項に記載の感放射線性樹脂組成物。
- さらに、(E)多官能(メタ)アクリレートを含むことを特徴とする請求項11~15のいずれか1項に記載の感放射線性樹脂組成物。
- さらに、(F)ケイ素、アルミニウム、ジルコニウム、チタン、亜鉛、インジウム、スズ、アンチモン、ストロンチウム、バリウム、セリウムおよびハフニウムからなる群より選ばれる少なくとも1種の元素を含む酸化物である無機酸化物粒子を含むことを特徴とする請求項11~16いずれか1項に記載の感放射線性樹脂組成物。
- (A)成分が、光酸発生体および光重合開始剤の少なくとも一方を含むことを特徴とする請求項11~17いずれか1項に記載の感放射線性樹脂組成物。
- (B)成分が、アミノ基、ブロックアミノ基、イソシアネート基およびブロックイソシアネート基の少なくとも1種を有する化合物を含むことを特徴とする請求項11~18のいずれか1項に記載の感放射線性樹脂組成物。
- (A)感光剤、並びに、(B)アルコキシシリル基含有化合物および該化合物の加水分解縮合物の少なくとも一方を含有してなる感放射線性樹脂組成物から形成される硬化膜であって、
銅を含む第1層と、銅以外の第2の金属元素の酸化物を含み該第1層の少なくとも一部を覆うよう構成された第2層とを有する金属配線を備えたタッチパネルの該金属配線の少なくとも一部を覆うのに用いられることを特徴とする硬化膜。
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