WO2014069392A1 - Écran tactile de capacité électrostatique ainsi que procédé de fabrication de celui-ci, et dispositif d'entrée - Google Patents

Écran tactile de capacité électrostatique ainsi que procédé de fabrication de celui-ci, et dispositif d'entrée Download PDF

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Publication number
WO2014069392A1
WO2014069392A1 PCT/JP2013/079098 JP2013079098W WO2014069392A1 WO 2014069392 A1 WO2014069392 A1 WO 2014069392A1 JP 2013079098 W JP2013079098 W JP 2013079098W WO 2014069392 A1 WO2014069392 A1 WO 2014069392A1
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Prior art keywords
layer
touch panel
disposed
lead
electrode
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PCT/JP2013/079098
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English (en)
Japanese (ja)
Inventor
荒木　勝己
橋本　明裕
松並　由木
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富士フイルム株式会社
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Publication of WO2014069392A1 publication Critical patent/WO2014069392A1/fr

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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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • 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
    • 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
    • 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
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • 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
    • 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
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Definitions

  • the present invention relates to a capacitive touch panel, and more particularly, to a capacitive touch panel having a sealing layer having predetermined characteristics and structure.
  • the present invention also relates to a method for manufacturing a capacitive touch panel and an input device.
  • a touch panel system As a touch panel system, a resistive film system, an optical sensor system, and the like are known, and in particular, a capacitive touch panel that detects a change in capacitance has recently become widespread.
  • Patent Document 1 (especially, refer to FIG. 6), an epoxy resin is applied to the surface of the side end portion of the resistive touch panel to form the side end reinforcing layer 28 to prevent intrusion of moisture and chemicals from the outside. And preventing softening of the transparent adhesive layer.
  • patent document 2 (especially FIG. 9), the sealing material 21 is formed so that the surroundings of the edge part of the upper electrode plate 1 and the lower electrode plate 3 in a touch panel may be covered, and a water
  • an object of the present invention is to provide a capacitive touch panel that suppresses the occurrence of malfunction when exposed to a high temperature and high humidity environment and has a high yield.
  • the present inventors have arranged a sealing layer in which the chlorine ion permeability coefficient and the average number of pinholes are within a predetermined range at a specific location on the capacitive panel, thereby increasing the temperature. Occurrence of malfunction when exposed to a high humidity environment is suppressed, that is, it has been found that a capacitive touch panel excellent in high temperature and high humidity reliability and having a high yield can be obtained, leading to the present invention. . That is, the present inventors have found that the above problem can be solved by the following configuration.
  • an insulating layer A plurality of electrode portions disposed on at least one main surface of the insulating layer; A plurality of lead-out wiring portions disposed on the main surface on which the plurality of electrode portions of the insulating layer are disposed and each having one end connected to the corresponding electrode portion; A transparent resin layer disposed on the electrode part and the lead-out wiring part so that the other end of each lead-out wiring part is exposed; A substrate disposed on the transparent resin layer; With At least a sealing layer is disposed on the surface of the peripheral portion of the transparent resin layer exposed from between the insulating layer and the substrate, and on the exposed surface of the lead-out wiring portion, The chlorine ion permeability coefficient of the sealing layer is 1.0 mg Cl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 or less, The capacitive touch panel wherein the average number of pinholes having a diameter of 1 ⁇ m or more present on the surface of the sealing layer is 5 (pieces / mm 2 ) or less.
  • a sealing layer is disposed on the peripheral surface of the second transparent resin layer and on the exposed surfaces of the first lead-out wiring and the second lead-out wiring;
  • the chlorine ion permeability coefficient of the sealing layer is 1.0 mg Cl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 or less,
  • the sealing layer is a layer formed of a composition for forming a sealing layer,
  • the sealing layer forming composition has a surface tension of 20 mN / m or less
  • the capacitive touch panel according to any one of (1) to (6), wherein the sealing layer forming composition has a viscosity of 100 cps or less.
  • the lead-out wiring portion includes silver.
  • the electrode part is a transparent electrode part made of metal nanowires having an average wire diameter of 50 nm or less and an average wire length of 5 ⁇ m or more.
  • Capacitive touch panel (11) The method for manufacturing the capacitive touch panel according to (2) above, An insulating layer; a plurality of first electrode portions disposed on the surface of the insulating layer; and a plurality of first electrode portions disposed on the surface of the insulating layer and each having one end connected to the corresponding first electrode portion.
  • a first transparent wiring layer, a first transparent resin layer disposed on the first electrode portion and the first lead wiring portion such that the other end of each of the first lead wiring portions is exposed, and the first transparent wiring portion A first protective substrate disposed on the resin layer; a first protective film disposed to be peelable on a main surface of the first protective substrate; and a plurality of second electrodes disposed on the back surface of the insulating layer. And a plurality of second wiring parts disposed on the back surface of the insulating layer and connected at one end to the corresponding second electrode part, and the other ends of the second lead-out wiring parts are exposed.
  • the second electrode portion and the second lead wiring portion A second transparent resin layer disposed on the second transparent resin layer, a second protective substrate disposed on the second transparent resin layer, and a second protective film disposed on the main surface of the second protective substrate in a peelable manner.
  • the manufacturing method of an electrostatic capacitance type touch panel provided with the process which makes the laminated body provided contact the composition for sealing layer formation containing a sealing agent.
  • An input device including the capacitive touch panel according to any one of (1) to (10) or the capacitive touch panel manufactured by the method according to (11) or (12).
  • the present invention it is possible to provide a capacitive touch panel that is excellent in high-temperature and high-humidity reliability and has a high yield.
  • (A) is a top view of 1st Embodiment of the electrostatic capacitance type touch panel of this invention
  • (B) is sectional drawing. It is an enlarged plan view of a 1st electrode part. It is sectional drawing of 2nd Embodiment of the capacitive touch panel of this invention. It is sectional drawing of 3rd Embodiment of the capacitive touch panel of this invention.
  • (A) is sectional drawing of 4th Embodiment of the capacitive touch panel of this invention, (B) is a partial top view.
  • (A) is sectional drawing of 5th Embodiment of the capacitive touch panel of this invention, (B) is a partial top view.
  • FIG. (A) is sectional drawing of 6th Embodiment of the capacitive touch panel of this invention
  • (B) is a partial top view. It is sectional drawing of the input device containing the electrostatic capacitance type touch panel of this invention.
  • 6 is a transmission electron micrograph of silver nanowires used in Example 7.
  • FIG. (A) And (B) is a histogram of the wire diameter and wire length of the silver nanowire used in Example 7.
  • the capacitive touch panel of the present invention (hereinafter also simply referred to as the touch panel of the present invention) has a predetermined sealing layer, which will be described later, arranged at a specific location on the capacitive touch panel.
  • the touch panel of the present invention is considered to exhibit excellent high-temperature and high-humidity reliability and high yield.
  • a predetermined sealing layer is arranged at specific locations (on the peripheral edge of the transparent resin layer and on the exposed surface of the lead-out wiring portion) of the capacitive touch panel.
  • the touch panel of the present invention is particularly characterized in that the sealing layer has predetermined characteristics and structure. Specifically, the chlorine ion permeability coefficient of the sealing layer and the average number of pinholes (pinholes having a diameter of 1 ⁇ m or more) existing on the surface of the sealing layer are within a predetermined range.
  • FIG. 1 (A) and (B) The schematic diagram of 1st Embodiment of the capacitive touch panel of this invention is shown to FIG. 1 (A) and (B).
  • 1A is a plan view of the capacitive touch panel 100
  • FIG. 1B is a cross-sectional view.
  • FIG. 1B is a schematic representation for facilitating understanding of the layer configuration of the capacitive touch panel 100, and is not a drawing that accurately represents the arrangement of each layer.
  • the capacitive touch panel 100 includes an insulating layer 10 and a first electrode portion 12 disposed on one main surface (on the surface) of the insulating layer 10.
  • the first lead wiring portion 14, the first transparent resin layer 16, the first protective substrate 18, the second electrode portion 20 disposed on the other main surface (on the back surface) of the insulating layer 10, and the second The lead-out wiring part 22, the second transparent resin layer 24, the second protective substrate 26, the sealing layer 28, and the flexible printed wiring board 30 are provided.
  • the aspect of the sealing layer 28 which is also one of the features of the present invention will be described in detail, and then each member will be described.
  • the sealing layer 28 is a layer that prevents moisture and the like from entering the capacitive touch panel 100.
  • the sealing layer 28 is at least on the peripheral surface of the first transparent resin layer 16 exposed from between the insulating layer 10 and the first protective substrate 18 and the insulating layer 10 and the second layer.
  • the peripheral portion of the first transparent resin layer 16 and the peripheral portion of the second transparent resin layer 24 are the first electrode portion 12 and the first lead-out on one main surface of the insulating layer 10.
  • the wiring portion 14, the first transparent resin layer 16, and the first protective substrate 18 are laminated in this order, and the second electrode portion 20, the second lead-out wiring portion 22, and the other main surface of the insulating layer 10 are provided.
  • the side surface portion of the first transparent resin layer 16 exposed to the outside. And the side part of the 2nd transparent resin layer 24 is intended.
  • the sealing layer 28 includes a sealing layer 28 a disposed on the insulating layer 10, the first lead wiring portion 14, and the flexible printed wiring board 30, the insulating layer 10, the second lead wiring portion 22, and the flexible print. It is comprised from the sealing layer 28b arrange
  • the sealing layers 28a and 28b are sealing layers disposed on one side of the long capacitive touch panel 100 in FIG. 1 on the side where the flexible printed wiring board 30 is disposed.
  • the sealing layer 28 a is an end face (side face) of the first transparent resin layer 16 on the other end side (side where the flexible printed wiring board 30 is present) of the first lead-out wiring portion 14 that is not covered by the first transparent resin layer 16.
  • the insulating layer 10, the first lead-out wiring portion 14, and the flexible printed wiring board so as to cover the exposed surface of the first lead-out wiring portion 14 that is not covered by the first transparent resin layer 16 and the flexible printed wiring board 30.
  • 30 is a layer disposed on 30.
  • the sealing layer 28b is an end surface (side surface) of the second transparent resin layer 24 on the other end side (side where the flexible printed wiring board 30 is present) of the second lead-out wiring portion 22 that is not covered by the second transparent resin layer 24.
  • the insulating layer 10, the second lead wiring portion 22, and the flexible printed wiring board so as to cover the exposed surface of the second lead wiring portion 22 that is not covered by the second transparent resin layer 24 and the flexible printed wiring board 30.
  • 30 is a layer disposed on 30.
  • the sealing layers 28 a and 28 b are arranged so as to cover part of the end surfaces of the first protective substrate 18 and the second protective substrate 26, but are not limited to this form. For example, you may arrange
  • the sealing layer 28c is an end surface (peripheral surface) of the capacitive touch panel 100.
  • the first electrode portion 12 and the first lead wiring portion 14 are covered with the first transparent resin layer 16 except for a part on the other end side of the first lead wiring portion 14.
  • the second electrode portion 20 and the second lead wiring portion 22 are covered with the second transparent resin layer 24 except for a part on the other end side of the second lead wiring portion 22. Therefore, in FIG.
  • the end surface of the capacitive touch panel 100 is intended to be an end surface formed from the end surfaces of the first transparent resin layer 16, the insulating layer 10, and the second transparent resin layer 24. . Note that, in the above-described three sides, the end surfaces of the first electrode portion 12 and the first lead wiring portion 14 or the end surfaces of the second electrode portion 20 and the second lead wiring portion 22 are exposed.
  • the end surface of the capacitive touch panel 100 is formed.
  • the sealing layer 28 c is disposed so as to cover the end surface of the insulating layer 10 on one side of the long capacitive touch panel 100 in FIG. 1 where the flexible printed wiring board 30 is disposed. In FIG.
  • the sealing layer 28 c is disposed so as to cover part of the end surfaces of the first protective substrate 18 and the second protective substrate 26, but is not limited to this form. For example, you may arrange
  • the sealing layers 28a, 28b, and 28c are disposed, but the present invention is not limited to this form.
  • the first electrode portion 12 is exposed from between the insulating layer 10 and the first transparent resin layer 16 and / or the second electrode portion 20 from between the insulating layer 10 and the second transparent resin layer 24.
  • the insulating layer 10 other than each main surface 18a and 26a of the 1st protective substrate 18 and the 2nd protective substrate 26, 1st transparent It is preferable that a sealing layer is disposed on the peripheral portion of the resin layer 16, the first protective substrate 18, the second transparent resin layer 24, and the second protective substrate 26 (peripheral portion of the capacitive touch panel 100).
  • a sealing layer may be disposed on the entire surface (exposed surface) of the capacitive touch panel 100.
  • the chlorine ion permeability coefficient of the sealing layer 28 is 1.0 mgCl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 or less.
  • “mgCl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 ” is the mass (mg) of chlorine ions (Cl ⁇ ) permeating the unit area (1 cm 2 ) per unit time (1 year), It represents the unit layer thickness (100 ⁇ m).
  • 0.5 mgCl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 or less is preferable, and 0.3 mgCl ⁇ (100 ⁇ m) is preferable because it is superior in high-temperature and high-humidity reliability and has a higher yield. More preferably, it is not more than cm ⁇ 2 ⁇ y ⁇ 1 .
  • the lower limit is not particularly limited, but is usually 0.01 mgCl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1 or more in many cases due to the properties of the materials used.
  • the chlorine ion permeability coefficient of the sealing layer 28 is more than 1.0 mg Cl ⁇ (100 ⁇ m) ⁇ cm ⁇ 2 ⁇ y ⁇ 1
  • the resistance of the capacitive touch panel to moisture etc. decreases, and the environment is in a high temperature and high humidity environment.
  • the insulation resistance between the lead-out wiring portions fluctuates, and malfunctions are likely to occur.
  • the chlorine ion permeability coefficient was measured according to JSCE-E 530-2003. More specifically, the evaluation is as follows. A test coating film consisting only of a sealing layer is prepared, and a chlorine ion permeability test device comprising two cells each having a volume of about 0.2 L on the left and right sides of the prepared test coating film is prepared. . A 5% sodium chloride aqueous solution is injected into the coating surface side cell (cell A), and distilled water is injected into the back surface side cell (cell B). The amount of the solution is taken until both sides of the test coating film are completely immersed in the solution, and the mass is measured to the order of 0.1 g each. Confirm that there is no liquid leakage after the solution injection.
  • the test temperature is 23 ⁇ 2 ° C. After 100 hours, a certain amount of solution is collected from the cell (cell B) on the distilled water side. At this time, the solution is collected after thoroughly stirring. Also, confirm that the entire test coating is always immersed in the solution. Chlorine ions are measured for the collected solution, and the chloride ion permeability coefficient is calculated. In addition, the measurement of a chlorine ion is performed according to JISK0101.
  • the average number of pinholes having a diameter of 1 ⁇ m or more present on the surface of the sealing layer 28 is 5 (pieces / mm 2 ) or less.
  • the surface of the sealing layer 28 means a surface exposed to the outside of the sealing layer 28 (exposed surface). Among them, it is preferably 3 (pieces / mm 2 ) or less, more preferably 1 (pieces / mm 2 ) or less, because it is superior in high-temperature and high-humidity reliability and yield is higher. It is particularly preferable that the number is 0 (pieces / mm 2 ).
  • the pinhole is a small hole (a recess or a through hole) existing on the surface of the sealing layer 28, and more specifically, a hole having a diameter of 1 ⁇ m or more.
  • the shape of the pinhole on the surface of the sealing layer is not particularly limited, but if it is not a perfect circle, the major axis is the diameter.
  • the average number of pinholes the area of at least 1 cm 2 on the surface of the sealing layer 28 is observed with an optical microscope, the number of pinholes having a diameter of 1 ⁇ m or more existing in the above range is counted, and the unit area (mm 2 ) It is obtained by converting to the average number per unit.
  • the thickness of the sealing layer 28 is preferably 0.1 ⁇ m or more, more preferably 1.0 ⁇ m or more, and more preferably 2.0 ⁇ m because the high temperature and high humidity reliability is superior and the yield is higher. More preferably, it is more preferably 4.0 ⁇ m or more.
  • the upper limit is not particularly limited, but is preferably 50 ⁇ m or less from the viewpoint that the effect is saturated and the economy is impaired.
  • the thickness of the sealing layer 28 is an average value obtained by measuring the thicknesses of any 20 or more locations of the sealing layer 28 and arithmetically averaging them.
  • the sealing layer 28 has a volume resistivity of preferably 10 11 ⁇ cm or more, more preferably 10 12 ⁇ cm or more, and even more preferably 10 13 ⁇ cm or more. If it is the said range, generation
  • the upper limit is not particularly limited, but is usually 10 18 ⁇ cm or less because of the characteristics of the organic compound used.
  • the material constituting the sealing layer 28 is not particularly limited as long as the sealing layer 28 is a material exhibiting the predetermined chlorine ion permeability coefficient described above.
  • an epoxy resin, a silicone resin, a vinyl chloride resin, a fluorine resin, and the like are examples of an epoxy resin, a silicone resin, a vinyl chloride resin, a fluorine resin, and the like.
  • a vinyl chloride resin or a fluororesin is preferable, and a fluororesin is more preferable because it is excellent in high temperature and high humidity reliability and has a higher yield. .
  • epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, brominated bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol S type epoxy resin, bisphenol AF type epoxy resin, and biphenyl type. An epoxy resin etc. are mentioned.
  • silicone resin examples include dimethyl silicone resin, methylphenyl silicone resin, modified silicone resin (epoxy modified silicone resin, amine modified silicone resin, etc.) and the like.
  • vinyl chloride resin examples include vinyl chloride and vinylidene chloride homopolymer resins, vinyl chloride and vinylidene chloride and other copolymerizable monomers (for example, ethylene, propylene, vinyl acetate, allyl chloride, allyl glycidyl ether, Acrylic acid ester, vinyl ether, and the like) and the like.
  • fluororesin examples include tetrafluoroethylene resin (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin (PFA), tetrafluoroethylene / hexafluoropropylene copolymer resin (FEP), and tetrafluoroethylene resin.
  • PTFE tetrafluoroethylene resin
  • PFA tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin
  • FEP tetrafluoroethylene / hexafluoropropylene copolymer resin
  • tetrafluoroethylene resin examples include tetrafluoroethylene resin (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin (PFA), tetrafluoroethylene / hexafluoropropylene copolymer resin (FEP), and tetrafluoroethylene resin
  • Ethylene-ethylene copolymer resin Ethylene-ethylene copolymer resin
  • PVDF vinylidene fluoride resin
  • PCTFE chlorotrifluoroethylene
  • PVF polyvinyl fluoride
  • ECTFE ethylene-chlorotrifluoroethylene resin
  • TFE / PDD fluorodimethyldioxole copolymer resin
  • the fluorine-based resin is excellent in high temperature and high humidity reliability and has a higher yield, so that (A) a (per) fluoroalkyl group and / or (per) fluoropolyether group having 1 to 12 carbon atoms is added. More preferably, it is a fluorine resin obtained by copolymerizing a monomer having carbon-carbon double bonds and (B) a monomer having carbon-carbon double bonds that does not contain fluorine.
  • the (per) fluoroalkyl group means a fluoroalkyl group or a perfluoroalkyl group
  • the (per) fluoropolyether group means a fluoropolyether group or a perfluoropolyether group.
  • a (meth) acrylate monomer and a vinyl monomer are preferable.
  • the (meth) acrylate monomer trifluoroethyl (meth) acrylate, perfluorodecylethyl (meth) acrylate, perfluorooctylethyl is used.
  • vinyl monomers include trifluoromethyl vinyl and perfluoroethyl. Examples thereof include vinyl and perfluoroethyl ether vinyl.
  • (meth) acrylate means acrylate or methacrylate.
  • the functional group in component (A) is preferably a perfluoroalkyl group or a perfluoropolyether group.
  • the component (A) can be used singly or in combination of two or more, and the content is based on a fluororesin obtained by copolymerizing the component (A) and the component (B). Further, it is preferably in the range of 50 to 95% by mass. When the component (A) is less than 50% by mass, the solubility in a solvent becomes low, and when it exceeds 95% by mass, the sealing layer 28 becomes brittle and easily becomes a sealing layer 28 due to a sudden temperature change or the like. Cracks occur, making it difficult to maintain moisture resistance, insulation, and acid resistance. From the above viewpoint, the component (A) is more preferably in the range of 60 to 85% by mass.
  • the monomer (B) that does not contain fluorine and has a carbon-carbon double bond is preferably a (meth) acrylate monomer, a styrene monomer, an olefin monomer, or a vinyl monomer.
  • (Meth) acrylate monomers include methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isobornyl (meth) acrylate, glycidyl (meth) acrylate, benzyl (meth) acrylate, stearyl (meth) acrylate, lauryl (meth) ) Acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, and the like.
  • the component (B) can be used singly or in combination of two or more, and the content is based on a fluororesin obtained by copolymerizing the component (A) and the component (B). Further, it is preferably in the range of 5 to 50% by mass. When the component (B) is less than 5% by mass, the sealing layer 28 becomes brittle, and when it exceeds 50% by mass, the solubility in a solvent is lowered. From the above viewpoint, the component (B) is more preferably in the range of 10 to 40% by mass.
  • the fluororesin is preferably obtained by copolymerizing the component (A) and the component (B). It does not specifically limit as a polymerization method, A conventionally well-known method can be used.
  • the fluorine-based resin preferably has a weight average molecular weight in the range of 50,000 to 800,000, and the component (A) and the component (B) may be copolymerized randomly. Moreover, you may copolymerize in the block shape.
  • sealing layer forming at least one resin selected from the group consisting of the epoxy resin, the silicone resin, the vinyl chloride resin, and the fluorine resin (hereinafter referred to as sealing layer forming). It is preferable to use a composition for forming a sealing layer (also referred to as a resin) (coating agent), and it is more preferable to use a composition for forming a sealing layer containing the fluororesin.
  • the resin for forming the sealing layer is preferably contained in the coating agent in the range of 8 to 60% by mass. When the content is 8% by mass or more, high moisture resistance is obtained. On the other hand, when the content is 60% by mass or less, since there is an appropriate viscosity, the coating property and the drying property are excellent.
  • the content of the sealing layer forming resin in the sealing layer forming composition is more preferably in the range of 10 to 50% by mass. It is preferable that the composition for sealing layer formation contains a nonflammable fluorine-type solvent other than the said resin for sealing layer formation.
  • Non-flammable fluorine-based solvent refers to a substance that does not produce a flash point by containing fluorine in the structure, and is preferably liquid at room temperature, and also has a drying property after the composition for forming a sealing layer is applied.
  • the boiling point is preferably 55 ° C. or higher. When the boiling point is 55 ° C. or higher, the drying speed is not too high, and a smooth and uniform film can be obtained.
  • the nonflammable fluorine-based solvent is not particularly limited as long as it has the above physical properties, and examples thereof include hydrofluoroether, perfluoropolyether, perfluoroalkane, hydrofluoropolyether, and hydrofluorocarbon. These nonflammable fluorine-type solvents can be used individually by 1 type or in mixture of 2 or more types.
  • the nonflammable fluorine-based solvent is preferably contained in the coating agent in the range of 20 to 92% by mass. If it is 20% by mass or more, non-flammability can be ensured, so that safety is excellent. On the other hand, if it is 92% by mass or less, high-temperature and high-humidity reliability is further improved, and the yield becomes higher. From the above viewpoint, the content of the nonflammable fluorine-based solvent in the composition for forming a sealing layer is more preferably in the range of 40 to 90% by mass.
  • another solvent can be added.
  • a flammable fluorine-based solvent such as trifluoropropanol or meta-xylene hexafluoride, or an organic solvent such as alcohol, paraffin-based solvent, or ester-based solvent can be mixed.
  • the sealing layer 28 preferably contains 1% by mass or more of fluorine atoms, more preferably 3% by mass or more, and still more preferably 5% by mass or more with respect to the total amount of the sealing layer. If it is the said range, generation
  • the upper limit is not particularly limited, but is usually 76% by mass or less due to the characteristics of the organic compound used.
  • the insulating layer 10 is a layer for ensuring insulation between the first electrode portion 12 and the second electrode portion 20.
  • the insulating layer 10 is a single layer, but may be a multilayer of two or more layers.
  • the thickness of the insulating layer 10 (in the case where the insulating layer is a multilayer of two or more layers) is not particularly limited, but is preferably 5 to 350 ⁇ m, more preferably 30 to 150 ⁇ m. Within the above range, desired visible light transmittance can be obtained, and handling is easy.
  • the total light transmittance of the insulating layer 10 is preferably 85 to 100%.
  • the insulating layer 10 is preferably a transparent insulating layer. Specific examples thereof include an insulating resin layer, a ceramic layer, and a glass layer. Especially, it is preferable that it is an insulating resin layer from the reason excellent in toughness. More specifically, the material constituting the insulating resin layer is polyethylene terephthalate, polyethersulfone, polyacrylic resin, polyurethane resin, polyester, polycarbonate, polysulfone, polyamide, polyarylate, polyolefin, cellulose resin, poly Examples include vinyl chloride and cycloolefin resins. Among these, polyethylene terephthalate, cycloolefin resin, polycarbonate, and triacetyl cellulose resin are preferable because of excellent transparency.
  • the first electrode unit 12 and the second electrode unit 20 are sensing electrodes that sense a change in capacitance in the capacitive touch panel 100, and constitute a sensing unit (sensor unit). That is, when the fingertip is brought into contact with the touch panel, the mutual capacitance between the first electrode portion 12 and the second electrode portion 20 changes, and the position of the fingertip is calculated by the IC circuit based on the amount of change.
  • the first electrode portion 12 is an electrode that extends in the first direction (X direction) and is arranged in a second direction (Y direction) orthogonal to the first direction, and includes a predetermined pattern.
  • the second electrode unit 20 is an electrode extending in the second direction (Y direction) and arranged in the first direction (X direction), and includes a predetermined pattern. In FIG.
  • FIG. 1 shows an enlarged plan view of the first electrode portion 12.
  • the first electrode portion 12 is composed of conductive thin wires 36, and includes a plurality of lattices 38 formed of intersecting conductive thin wires 36.
  • the second electrode unit 20 also includes a plurality of lattices 38 formed by intersecting conductive thin wires 36, as in the first electrode unit 12.
  • the first electrode portion 12 and the second electrode portion 20 are both long electrodes, but the shape is not limited to this mode, and a so-called diamond pattern in which diamond shapes are connected in series. But you can.
  • Examples of the material of the conductive thin wire 36 include metals and alloys such as gold (Au), silver (Ag), copper (Cu), and aluminum (Al), ITO, tin oxide, zinc oxide, cadmium oxide, gallium oxide, Examples thereof include metal oxides such as titanium oxide. Among these, silver is preferable because the conductivity of the conductive thin wire 36 is excellent.
  • the conductive thin wire 36 preferably contains a binder.
  • the binder is preferably a water-soluble polymer because the adhesiveness between the conductive thin wire 36 and the insulating layer 10 is more excellent.
  • the binder include gelatin, carrageenan, polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), starch and other polysaccharides, cellulose and derivatives thereof, polyethylene oxide, polysaccharides, polyvinylamine, chitosan, polylysine, and polyacryl.
  • examples include acid, polyalginic acid, polyhyaluronic acid, carboxycellulose, gum arabic, and sodium alginate.
  • gelatin is preferable because the adhesion between the conductive thin wire 36 and the insulating layer 10 is more excellent.
  • acid-processed gelatin may be used as gelatin, and gelatin hydrolyzate, gelatin enzyme decomposition product, and other gelatins modified with amino groups and carboxyl groups (phthalated gelatin, acetylated gelatin) Can be used.
  • the volume ratio of metal to binder (metal volume / binder volume) in the conductive thin wire 36 is preferably 1.0 or more, and more preferably 1.5 or more. By setting the volume ratio of the metal and the binder to 1.0 or more, the conductivity of the conductive thin wire 36 can be further increased.
  • the upper limit is not particularly limited, but is preferably 4.0 or less and more preferably 2.5 or less from the viewpoint of productivity. Note that the volume ratio of the metal and the binder can be calculated from the density of the metal and the binder contained in the conductive thin wire 36. For example, when the metal is silver, the density of silver is 10.5 g / cm 3 , and when the binder is gelatin, the density of gelatin is 1.34 g / cm 3 .
  • the line width of the conductive thin wire 36 is not particularly limited, but is preferably 30 ⁇ m or less, more preferably 15 ⁇ m, further preferably 10 ⁇ m, particularly preferably 9 ⁇ m or less, and particularly preferably 7 ⁇ m or less, from the viewpoint that a low-resistance electrode can be formed relatively easily. Is most preferable, 0.5 ⁇ m or more is preferable, and 1.0 ⁇ m or more is more preferable.
  • the thickness of the conductive thin wire 36 is not particularly limited, but can be selected from 0.00001 mm to 0.2 mm from the viewpoint of conductivity and visibility, but is preferably 30 ⁇ m or less, more preferably 20 ⁇ m or less, and 0.01 Is more preferably from 9 to 9 ⁇ m, most preferably from 0.05 to 5 ⁇ m.
  • the lattice 38 includes an opening region surrounded by the conductive wiring 36.
  • the length W of one side of the grating 38 is preferably 800 ⁇ m or less, more preferably 600 ⁇ m or less, and preferably 400 ⁇ m or more.
  • the aperture ratio is preferably 85% or more, more preferably 90% or more, and most preferably 95% or more from the viewpoint of visible light transmittance. preferable.
  • the aperture ratio corresponds to the ratio of the entire transparent portion excluding the conductive thin wires 36 in the first electrode portion 12 or the second electrode portion 20 in a predetermined region.
  • the lattice 38 has a substantially rhombus shape.
  • other polygonal shapes for example, hexagons
  • the shape of one side may be a curved shape or a circular arc shape in addition to a linear shape.
  • the two opposing sides may have an outwardly convex arc shape, and the other two opposing sides may have an inwardly convex arc shape.
  • the shape of each side may be a wavy shape in which an outwardly convex arc and an inwardly convex arc are continuous.
  • the shape of each side may be a sine curve.
  • the conductive thin wires 36 are formed as a mesh pattern, but the present invention is not limited to this mode, and may be a stripe pattern.
  • the first electrode portion 12 and the second electrode portion 20 are composed of the conductive thin wires 36, but the present invention is not limited to this mode.
  • a metal oxide thin film such as ITO or ZnO
  • You may be comprised with metal nanowire particles, such as metal oxide particles, metal pastes, such as silver paste and copper paste, silver nanowire, and copper nanowire.
  • silver nanowires are preferable because they are excellent in conductivity and transparency.
  • the patterning of the electrode part can be selected according to the material of the electrode part, and a photolithography method, a resist mask screen printing-etching method, an ink jet method, a printing method, or the like may be used.
  • the first lead wiring portion 14 is a wiring for connecting the first electrode portion 12 and a flexible printed wiring board 30 described later.
  • the first lead-out wiring part 14 is disposed at the peripheral edge of the first electrode part 12, one end thereof is connected to the corresponding first electrode part 12, and the other end is electrically connected to a terminal (not shown) in the flexible printed wiring board 30. Connected to. That is, the other end of the first lead wiring portion 14 extends to the outside of the first transparent resin layer 16 described later, and the sealing layer 28 described above is disposed on the extending portion.
  • the second lead wiring part 22 is a wiring for connecting the second electrode part 20 and a flexible printed wiring board 30 described later.
  • the second lead wiring part 22 is arranged at the peripheral part of the second electrode part 20, one end thereof is connected to the second electrode part 20, and the other end is electrically connected to a terminal (not shown) in the flexible printed wiring board 30. is doing. That is, the other end of the second lead-out wiring portion 22 extends to the outside of a second transparent resin layer 24 described later, and the above-described sealing layer 28 is disposed on the extended portion. As shown in FIG. 1, the other ends of the first lead-out wiring portion 14 and the second lead-out wiring portion 22 are gathered to constitute the other end connected to the flexible printed wiring board 30. In FIG. 1, five first lead-out wiring portions 14 and four second lead-out wiring portions 22 are described, but the number thereof is not particularly limited, and a plurality of the first lead-out wiring portions 22 are usually set according to the number of electrode portions. Be placed.
  • Examples of the wiring material constituting the first lead wiring portion 14 and the second lead wiring portion 22 include metals such as gold (Au), silver (Ag), and copper (Cu), tin oxide, zinc oxide, Examples thereof include metal oxides such as cadmium oxide, gallium oxide, and titanium oxide. Among these, silver is preferable because of its excellent conductivity. Moreover, you may be comprised with metal pastes, such as a silver paste and a copper paste, metals, such as aluminum (Al) and molybdenum (Mo), and an alloy thin film. In the case of a metal paste, a screen printing or ink jet printing method is used, and in the case of a metal or alloy thin film, a patterning method such as a photolithography method is suitably used for the sputtered film.
  • metal pastes such as a silver paste and a copper paste
  • metals such as aluminum (Al) and molybdenum (Mo)
  • an alloy thin film In the case of a metal paste, a screen printing or in
  • the surface resistance value is lower than that of a metal oxide such as ITO, and a transparent conductive material is used.
  • metal nanowires may be used.
  • the metal nanowire is preferably metal fine particles having an aspect ratio (average wire length / average wire diameter) of 30 or more, an average wire diameter of 1 nm to 150 nm, and an average wire length of 1 ⁇ m to 100 ⁇ m.
  • the average wire diameter of the metal nanowire is preferably 100 nm or less, more preferably 50 nm or less, and further preferably 35 nm or less.
  • the average wire length of the metal nanowire is preferably 1 ⁇ m to 40 ⁇ m, more preferably 3 ⁇ m to 35 ⁇ m, and even more preferably 5 ⁇ m to 30 ⁇ m.
  • the metal constituting the metal nanowire is not particularly limited, may be composed of only one kind of metal, may be used in combination of two or more kinds of metals, and may be an alloy. Specifically, copper, silver, gold, platinum, palladium, nickel, tin, cobalt, rhodium, iridium, iron, ruthenium, osmium, manganese, molybdenum, tungsten, niobium, tantalum, titanium, bismuth, antimony, lead, or These alloys are mentioned. Silver nanowires containing 50% or more of silver by mass ratio are preferred.
  • the metal nanowire may be produced by any method.
  • a method for producing metal nanowires is described in, for example, Adv. Mater. vol. 14, 2002, 833-837, Japanese Patent Application Laid-Open No. 2010-084173, and US Patent Publication No. 2011-0174190.
  • References related to the metal nanowires include, for example, Japanese Patent Application Laid-Open Nos. 2010-86714, 2010-87105, 2010-250109, 2010-250110, and 2010-. No. 251611, No. 2011-54419, No. 2011-60686, No. 2011-65765, No. 2011-70792, No. 2011-86482, No. 2011-96813.
  • the first transparent resin layer 16 and the second transparent resin layer 24 are disposed on the first electrode part 12 and the second electrode part 20, respectively, between the first electrode part 12 and the first protective substrate 18, and It is a layer (particularly an adhesive transparent resin layer) for ensuring the adhesion between the second electrode part 20 and the second protective substrate 26.
  • the first transparent resin layer 16 covers the first lead wiring portion 14 and the first electrode portion 12 so that the other end of the first lead wiring portion 14 connected to the flexible printed wiring board 30 is exposed.
  • the second transparent resin layer 24 covers the second lead wiring portion 22 and the second electrode portion 20 so that the other end connected to the flexible printed wiring board 30 of the second lead wiring portion 22 is exposed. As shown in FIG.
  • the size of the first transparent resin layer 16 and the second transparent resin layer 24 is such that the other end of the first lead wiring portion 14 and the other end of the second lead wiring portion 22 are exposed. Usually, it is smaller than the insulating layer 10.
  • the thicknesses of the first transparent resin layer 16 and the second transparent resin layer 24 are not particularly limited, but are preferably 5 to 350 ⁇ m, and more preferably 30 to 150 ⁇ m. Within the above range, desired visible light transmittance can be obtained, and handling is easy.
  • the total light transmittance of the first transparent resin layer 16 and the second transparent resin layer 24 is preferably 85 to 100%.
  • the material constituting the first transparent resin layer 16 and the second transparent resin layer 24 it is preferable to use a known adhesive, for example, a rubber-based adhesive insulating material, an acrylic adhesive insulating material, a silicone-based adhesive.
  • a rubber-based adhesive insulating material for example, an acrylic adhesive insulating material, a silicone-based adhesive.
  • a conductive insulating material for example, a conductive insulating material.
  • an acrylic adhesive insulating material is preferable from the viewpoint of excellent transparency.
  • the acrylic adhesive insulating material which is a preferred embodiment of the adhesive insulating material is mainly composed of an acrylic polymer having a repeating unit derived from alkyl (meth) acrylate. (Meth) acrylate refers to acrylate and / or methacrylate.
  • an acrylic polymer having a repeating unit derived from an alkyl (meth) acrylate having an alkyl group with about 1 to 12 carbon atoms is preferable, because the adhesiveness is more excellent.
  • An acrylic polymer having a repeating unit derived from the alkyl methacrylate having the carbon number and a repeating unit derived from the alkyl acrylate having the carbon number is more preferable.
  • a repeating unit derived from (meth) acrylic acid may be contained.
  • the first protective substrate 18 and the second protective substrate 26 are substrates disposed on the first transparent resin layer 16 and the second transparent resin layer 24, respectively, and the first electrode unit 12 and the second electrode unit 20 from the external environment.
  • the main surface of one of the protective substrates constitutes a touch surface.
  • the first protective substrate 18 and the second protective substrate 26 are preferably transparent substrates, and plastic films, plastic plates, glass plates and the like are used. It is desirable that the thickness of the layer is appropriately selected according to each application.
  • polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); polyolefins such as polyethylene (PE), polypropylene (PP), polystyrene, and EVA; Resin;
  • polycarbonate (PC) polyamide, polyimide, acrylic resin, triacetyl cellulose (TAC), cycloolefin resin (COP), and the like can be used.
  • a liquid crystal display, a polarizing plate, a circular polarizing plate, or the like may be used as the first protective substrate 18 and the second protective substrate 26 .
  • the flexible printed wiring board 30 is a board in which a plurality of wirings and terminals are provided on a substrate, and is connected to the other end of each of the first lead-out wiring parts 14 and the other end of the second lead-out wiring part 22, It plays a role of connecting the capacitive touch panel 100 and an external device (for example, a liquid crystal display device). As shown in FIG. 1, the flexible printed wiring board 30 is disposed so as to sandwich the first lead wiring portion 14, the insulating layer 10, and the second lead wiring portion 22.
  • positioned on both surfaces of an insulating layer was shown in FIG. 1, it is not limited to this so that it may mention later.
  • two insulating layers with an electrode part having an insulating layer and an electrode part disposed on the surface of the insulating layer are prepared so that the electrode parts face each other, or the insulating layer of one insulating part with an electrode part and the other
  • the aspect which has a sealing layer with the electrostatic capacitance type touchscreen obtained by bonding together through a transparent resin layer so that the electrode part of the insulating layer with an electrode part may face may be mentioned.
  • the aspect which has a sealing layer with the electrostatic capacitance type touch panel obtained by providing a 1st electrode part and a 2nd electrode part on one main surface of an insulating layer is also mentioned.
  • the manufacturing method of the capacitive touch panel 100 is not particularly limited, and a known method can be adopted.
  • a method of forming the first electrode portion 12 and the first lead wiring portion 14 and the second electrode portion 20 and the second lead wiring portion 22 on the insulating layer 10 for example, on both main surfaces of the insulating layer 10. Examples include a method of exposing and developing the photoresist film on the formed metal foil to form a resist pattern, and etching the metal foil exposed from the resist pattern.
  • a method of printing a paste containing metal fine particles or metal nanowires on both main surfaces of the insulating layer 10 and performing metal plating on the paste can be mentioned.
  • the method of printing and forming on the insulating layer 10 by a screen printing plate or a gravure printing plate, or the method of forming by an inkjet is also mentioned.
  • a method using silver halide can be mentioned. More specifically, the step (1) of forming a silver halide emulsion layer (hereinafter also simply referred to as a photosensitive layer) containing silver halide and a binder on both surfaces of the insulating layer 10, Examples of the method include a step (2) of forming the first electrode part 12 and the first lead-out wiring part 14, and the second electrode part 20 and the second lead-out wiring part 22 by developing after exposure. Below, each process is demonstrated.
  • Step (1) is a step of forming a photosensitive layer containing silver halide and a binder on both surfaces of the insulating layer 10.
  • the method for forming the photosensitive layer is not particularly limited, but from the viewpoint of productivity, the photosensitive layer forming composition containing silver halide and a binder is brought into contact with the insulating layer 10 and photosensitive on both sides of the insulating layer 10.
  • a method of forming a conductive layer is preferred.
  • the photosensitive layer forming composition contains a silver halide and a binder.
  • the halogen element contained in the silver halide may be any of chlorine, bromine, iodine and fluorine, or a combination thereof.
  • As the silver halide for example, a silver halide mainly composed of silver chloride, silver bromide or silver iodide is preferably used, and further a silver halide mainly composed of silver bromide or silver chloride is preferably used.
  • the kind of binder used is as above-mentioned.
  • the binder may be contained in the composition for photosensitive layer formation in the form of latex.
  • the volume ratio of the silver halide and the binder contained in the composition for forming the photosensitive layer is not particularly limited, and is appropriately adjusted so as to be within a suitable volume ratio range of the metal and the binder in the conductive thin wire 36 described above. Is done.
  • the composition for forming a photosensitive layer contains a solvent, if necessary.
  • the solvent used include water, organic solvents (for example, alcohols such as methanol, ketones such as acetone, amides such as formamide, sulfoxides such as dimethyl sulfoxide, esters such as ethyl acetate, ethers, and the like. Etc.), ionic liquids, or mixed solvents thereof.
  • the content of the solvent to be used is not particularly limited, but is preferably in the range of 30 to 90% by mass, and more preferably in the range of 50 to 80% by mass with respect to the total mass of silver halide and binder.
  • the method for bringing the composition for forming a photosensitive layer and the insulating layer 10 into contact with each other is not particularly limited, and a known method can be employed.
  • coating the composition for photosensitive layer formation to the insulating layer 10, the method of immersing the insulating layer 10 in the composition for photosensitive layer formation, etc. are mentioned.
  • the content of the binder in the formed photosensitive layer is not particularly limited but is preferably 0.3 ⁇ 5.0g / m 2, more preferably 0.5 ⁇ 2.0g / m 2.
  • the content of silver halide in the photosensitive layer is not particularly limited, but is preferably 1.0 to 20.0 g / m 2 in terms of silver from the viewpoint that the conductive properties of the conductive fine wire 36 are more excellent. 0 to 15.0 g / m 2 is more preferable.
  • the protective layer By providing the protective layer, scratches can be prevented and mechanical properties can be improved.
  • Step (2) Exposure and development step
  • the photosensitive layer obtained in the above step (1) is subjected to pattern exposure and then developed to thereby perform the first electrode portion 12 and the first lead-out wiring portion 14, and the second electrode portion 20 and This is a step of forming the second lead wiring portion 22.
  • the pattern exposure process will be described in detail below, and then the development process will be described in detail.
  • the silver halide in the photosensitive layer in the exposed region forms a latent image.
  • conductive thin lines are formed by a development process described later.
  • the silver halide dissolves and flows out of the photosensitive layer during the fixing process described later, and a transparent film is obtained.
  • the light source used in the exposure is not particularly limited, and examples thereof include light such as visible light and ultraviolet light, and radiation such as X-rays.
  • the method for performing pattern exposure is not particularly limited. For example, surface exposure using a photomask may be performed, or scanning exposure using a laser beam may be performed.
  • the shape of the pattern is not particularly limited, and is appropriately adjusted according to the pattern of the conductive fine wire to be formed.
  • the development processing method is not particularly limited, and a known method can be employed.
  • a usual development processing technique used for silver salt photographic film, photographic paper, film for printing plate making, emulsion mask for photomask, and the like can be used.
  • the type of the developer used in the development process is not particularly limited.
  • PQ developer, MQ developer, MAA developer and the like can be used.
  • Commercially available products include, for example, CN-16, CR-56, CP45X, FD-3, Papitol, Fujifilm prescription, C-41, E-6, RA-4, D-19, D-72 prescription of KODAK.
  • a developer contained in a kit thereof can be used.
  • a lith developer can also be used.
  • the development process can include a fixing process performed for the purpose of removing and stabilizing the silver salt in the unexposed part.
  • a technique of fixing process used for silver salt photographic film, photographic paper, film for printing plate making, emulsion mask for photomask, and the like can be used.
  • the fixing temperature in the fixing step is preferably about 20 ° C. to about 50 ° C., more preferably 25 to 45 ° C.
  • the fixing time is preferably 5 seconds to 1 minute, more preferably 7 seconds to 50 seconds.
  • the mass of the metallic silver contained in the exposed portion (conductive thin wire) after the development treatment is preferably a content of 50% by mass or more with respect to the mass of silver contained in the exposed portion before the exposure, More preferably, it is at least mass%. If the mass of silver contained in the exposed portion is 50% by mass or more based on the mass of silver contained in the exposed portion before exposure, it is preferable because high conductivity can be obtained.
  • the following undercoat layer forming step, antihalation layer forming step, or heat treatment may be performed as necessary.
  • (Undercoat layer forming process) For the reason of excellent adhesion between the insulating layer and the silver halide emulsion layer, it is preferable to perform a step of forming an undercoat layer containing the binder on both sides of the insulating layer before the step (1).
  • the binder used is as described above.
  • the thickness of the undercoat layer is not particularly limited, but is preferably from 0.01 to 0.5 ⁇ m, more preferably from 0.01 to 0.1 ⁇ m, from the viewpoint that the adhesiveness and the rate of change in mutual capacitance can be further suppressed.
  • the antihalation layer contains a cross-linking agent because the rate of change in mutual capacitance is further suppressed and the migration resistance between the electrode portions is excellent.
  • the cross-linking agent both organic hardeners and inorganic hardeners can be used, but organic hardeners are preferable from the viewpoint of hardening control. Specific examples include, for example, aldehydes, ketones, and carboxylic acids. Derivatives, sulfonic acid esters, triazines, active olefins, isocyanates, carbodiimides.
  • Step (3) is a step of performing heat treatment after the development processing. By carrying out this step, fusion occurs between the binders, and the hardness of the conductive thin wire is further increased.
  • the binder when polymer particles are dispersed as a binder in the composition for forming a photosensitive layer (when the binder is polymer particles in latex), by performing this step, fusion occurs between the polymer particles, Conductive thin wires having a desired hardness are formed.
  • the conditions for the heat treatment are appropriately selected depending on the binder used, but it is preferably 40 ° C. or higher from the viewpoint of the film forming temperature of the polymer particles, more preferably 50 ° C. or higher, and further 60 ° C. or higher. preferable.
  • the temperature is preferably 150 ° C. or lower, and more preferably 100 ° C. or lower.
  • the heating time is not particularly limited, but is preferably 1 to 5 minutes and more preferably 1 to 3 minutes from the viewpoint of suppressing curling of the insulating layer and the like and productivity.
  • this heat treatment can be combined with a drying step usually performed after exposure and development processing, it is not necessary to increase a new step for film formation of polymer particles, and productivity, cost, etc. Excellent from a viewpoint.
  • the light transmissive part containing a binder is formed between electroconductive fine wires.
  • the transmittance in the light transmissive part is 90% or more, preferably 95% or more, more preferably 97% or more, and still more preferably, the transmittance indicated by the minimum value of the transmittance in the wavelength region of 380 to 780 nm. 98% or more, and most preferably 99% or more.
  • the light transmissive portion may contain materials other than the binder, and examples thereof include a silver difficult solvent. By including a silver difficult solvent in the light transmissive portion, it is possible to further suppress ion migration of the metal between the conductive thin wires.
  • pKsp is preferably 9 or more, more preferably 10-20.
  • TTHA triethylenetetramine hexaacetic acid
  • the solubility product Ksp of silver is a measure of the strength of interaction of these compounds with silver ions.
  • the measuring method of Ksp is “Kiken Sakaguchi / Shinichi Kikuchi, Journal of the Japan Photography Society, 13, 126, (1951)” and “A. Paliofet and J. Pauladier, Bull. Soc. Chim. France, 1982, I-445 ( 1982) ".
  • the method for forming the first transparent resin layer 16 and the second transparent resin layer 24 is not particularly limited, and a known method for laminating a transparent resin film or a composition for forming a transparent resin layer for forming a transparent resin layer is applied. And a method of forming a layer.
  • a method of forming a layer When forming the first transparent resin layer 16 and the second transparent resin layer 24, the other end of the first lead-out wiring portion 14 opposite to the one end joined to the first electrode portion 12, and Each layer is formed so that the other end of the second lead wiring portion 22 opposite to the one end joined to the second electrode portion 20 is exposed.
  • the method for forming the first protective substrate 18 and the second protective substrate 26 is not particularly limited, and examples thereof include a method in which protective substrates are bonded to the first transparent resin layer 16 and the second transparent resin layer 24, respectively. Then, the terminal (not shown) of the flexible printed wiring board 30 is connected to the exposed other ends of the first lead wiring part 14 and the second lead wiring part 22, and the flexible printed wiring board 30 is arranged to form a laminate. Get.
  • the formation method in particular of the sealing layer 28 is not restrict
  • coating the composition for sealing layer formation (coating agent) which forms the sealing layer 28 to a specific position is mentioned. More specifically, a method of immersing the laminate in the composition, a method of spray-coating the composition at a predetermined position of the laminate, and the like can be mentioned. For example, when the sealing layer is disposed on the entire surface other than the main surfaces 18a and 26a of the first protective substrate 18 and the second protective substrate 26, the first protective substrate 18 and the second protective substrate 18 of the laminate obtained above.
  • a peelable protective film is disposed on each of the main surfaces 18a and 26a of the protective substrate 26, and the obtained laminate is brought into contact with the sealing layer forming composition (preferably, the sealing layer forming composition).
  • the desired capacitive touch panel can be manufactured by removing the protective film and then removing the protective film.
  • the composition for forming a sealing layer described above has high drying properties, it can be easily dried by leaving it at room temperature, and a film can be obtained. May be.
  • the average number of pinholes in the sealing layer 28 is in a predetermined range. More specifically, the average number of pinholes having a diameter of 1 ⁇ m or more present on the surface of the sealing layer 28 is 5 (pieces / mm). 2 )
  • a method for forming such a sealing layer 28 is not particularly limited, and examples thereof include a method of defoaming a sealing layer forming composition used for forming the sealing layer 28. When the defoaming composition for forming a sealing layer is used, the generation of pinholes can be suppressed because there are few bubbles and dissolved gases that cause pinholes in the composition.
  • a method of defoaming the sealing layer forming composition As a method of defoaming the sealing layer forming composition, a method of filtering the sealing layer forming composition, a method of ultrasonically treating the sealing layer forming composition, and reducing the pressure of the sealing layer forming composition And a method of adding an antifoaming agent to the composition for forming a sealing layer.
  • the method of filtering the sealing layer forming composition or the method of ultrasonicating the sealing layer forming composition is preferable because it is superior in high temperature and high humidity reliability and has a higher yield. .
  • the method for filtering the composition for forming the sealing layer is not particularly limited, and known methods such as suction filtration, pressure filtration, and centrifugation can be used.
  • the pore size of the filter is not particularly limited, but is preferably 0.1 to 10 ⁇ m, and more preferably 0.2 to 5 ⁇ m, because pinholes are easily reduced and the yield is further increased.
  • the method for ultrasonically treating the composition for forming a sealing layer is not particularly limited, and a known method such as a method using an ultrasonic cleaner or a method using an ultrasonic homogenizer can be used.
  • the method for reducing the pressure of the composition for forming the sealing layer is not particularly limited, and a known method such as a method using a vacuum pump can be used.
  • the antifoaming agent added to the composition for forming a sealing layer is not particularly limited, and known antifoaming agents such as silicon oil, fluorine oil, and polycarboxylic acid polymer can be used.
  • Another method for forming the sealing layer 28 having an average number of pinholes within a predetermined range is, for example, a method of immersing the laminate while ultrasonically treating the composition for forming a sealing layer. It is done. By immersing the laminate while ultrasonically treating the composition for forming a sealing layer, bubbles that cause pinholes can be prevented from adhering to the laminate.
  • the surface tension of the composition for forming a sealing layer is preferably 20 mN / m or less, and more preferably 15 mN / m or less. Further, the viscosity of the composition for forming a sealing layer is preferably 100 cps or less, and more preferably 50 cps or less. If it is the said range, generation
  • FIG. 3 is a schematic view for facilitating understanding of the layer configuration of the capacitive touch panel 200, and is not a drawing that accurately represents the arrangement of each layer.
  • the capacitive touch panel 200 includes a first insulating layer 40, a first electrode portion 12 and a first lead wiring portion 14 disposed on one main surface of the first insulating layer 40.
  • the capacitive touch panel 200 shown in FIG. 3 has the same layers as the capacitive touch panel 200 shown in FIG. 1 except that the order of the layers is different.
  • the reference numerals are attached and the description thereof is omitted.
  • the 1st insulating layer 40 and the 2nd insulating layer 42 are the layers similar to the insulating layer 10 shown in FIG. 1, The definition is as above-mentioned.
  • the protective substrate 44 is a layer similar to the first protective substrate 18 and the second protective substrate 26 shown in FIG. 1, and the definition thereof is as described above.
  • a plurality of the first electrode portions 12 and the second electrode portions 20 in FIG. 3 are used as shown in FIG. 1, and they are arranged so as to be orthogonal to each other as shown in FIG. .
  • first transparent resin layer 16 is formed on the first electrode part 12 and the first lead-out wiring part 14 so that the other ends of the first lead-out wiring part 14 and the second lead-out wiring part 22 are exposed, and Arranged on the second electrode portion 20 and the second lead wiring portion 22.
  • the capacitive touch panel 200 shown in FIG. 3 is provided with two insulating layers with electrode portions each having an insulating layer, an electrode portion disposed on the surface of the insulating layer, and a lead-out wiring portion so that the electrode portions face each other.
  • the sealing layer 28 includes a peripheral portion of the first transparent resin layer 16 exposed from between the first insulating layer 40 and the second insulating layer 42 (substrate).
  • the layer 16 and the flexible printed wiring board 30 are respectively disposed on the exposed surfaces that are not covered.
  • FIG. 4 is a schematic view for facilitating understanding of the layer structure of the capacitive touch panel 300, and is not a drawing that accurately represents the arrangement of each layer.
  • the capacitive touch panel 300 includes a first insulating layer 40, a first electrode portion 12 and a first lead-out wiring portion 14 disposed on one main surface of the first insulating layer 40.
  • the capacitive touch panel 300 shown in FIG. 4 has the same layers as the capacitive touch panel 300 shown in FIG. 3 except that the order of the layers is different.
  • the reference numerals are attached and the description thereof is omitted.
  • the 1st electrode part 12 and the 2nd electrode part 20 in FIG. 4 are each used in multiple numbers as shown in FIG. 1, and both are arrange
  • the first transparent resin layer 16 is disposed on the first electrode portion 12 and the first lead wiring portion 14 so that the other end of the first lead wiring portion 14 is exposed.
  • the second transparent resin layer 24 is disposed on the second electrode portion 20 and the second lead wiring portion 22 so that the other end of the second lead wiring portion 22 is exposed.
  • the capacitive touch panel 300 shown in FIG. 4 is provided with two insulating layers with an electrode portion having an insulating layer, an electrode portion disposed on the surface of the insulating layer, and a lead-out wiring portion, and one insulating layer with an electrode portion. It corresponds to the electrostatic capacitance type touch panel obtained by bonding through a transparent resin layer so that the insulating layer of this and the electrode part of the other insulating layer with an electrode part may face each other.
  • the sealing layer 28 is formed on the surface of the peripheral portion of the first transparent resin layer 16 exposed from between the first insulating layer 40 and the second insulating layer 42 and the second insulating layer 42.
  • FIG. 5 is a cross-sectional view of the capacitive touch panel 400
  • FIG. 5B is a partial plan view.
  • FIG. 5 is a schematic view for facilitating understanding of the layer structure of the capacitive touch panel 400, and is not a drawing that accurately shows the arrangement of each layer.
  • the capacitive touch panel 400 includes a plurality of jumpers 46, a second insulating layer 42, a first electrode unit 12, a first lead wiring unit (not shown), and a second electrode unit on the surface of the first insulating layer 40.
  • the transparent resin layer 48 is the same layer as the first transparent resin layer 16 and the second transparent resin layer 24 described above, and the definition thereof is as described above.
  • the jumpers 46 are made of a conductive material, and are arranged in a matrix in the X-axis direction and the Y-axis direction on the surface of the first insulating layer 40. Each of the jumpers 46 is for connecting the second electrode portions 20 aligned in the X-axis direction in the X-axis direction.
  • the jumper 46 can be formed of a conductive polymer such as metal (MAM, APC, etc.), ITO (IndiumITOTin Oxide), PEDOT (polyethylenedioxythiophene), or the like.
  • MAM is an abbreviation of Mo (molybdenum) / Al (aluminum) / Mo and is a conductive material having a three-layer structure.
  • APC is a silver / palladium / copper alloy.
  • the second insulating layer 42 is formed by laminating so as to cover the entire surfaces of the jumper 46 and the first insulating layer 40.
  • a through hole 50 reaching the surface of the jumper 46 is provided in the second insulating layer 42 where the second electrode unit 20 and the jumper 46 overlap.
  • the capacitive touch panel 400 includes a second electrode unit 20 that is intermittently arranged in the same layer in the X-axis direction and the Y-axis direction orthogonal thereto, and the X-axis.
  • the first electrode portions 12 are arranged in the direction and the Y-axis direction and are arranged between the rows and columns of the second electrode portions 20.
  • the second electrode portions 20 aligned in the X-axis direction are not connected to each other in the X-axis direction and the Y-axis direction on the second insulating layer 42, but are connected to each other through the through hole 50. It is in a state of being electrically connected to the jumper 46 on the insulating layer 40.
  • each of the first electrode portions 12 is arranged in the X-axis direction and the Y-axis direction, and is disposed between the rows and the columns of the first electrode portions 12, and on the second insulating layer 42, the connection portion 52. Are connected to each other in the Y-axis direction.
  • first lead wiring portion and a second lead wiring portion are connected to the first electrode portion 12 and the second electrode portion 20, respectively.
  • the transparent resin layer 48 is formed on the first electrode part 12 and the second electrode part 20 and the first lead wiring part (not shown) so that the other ends of the first lead wiring part and the second lead wiring part (not shown) are exposed. And disposed on the second lead-out wiring portion.
  • the protective substrate 44 is disposed on the transparent resin layer 48. Note that a flexible printed wiring board (not shown) is connected to the other ends of the first lead wiring portion and the second lead wiring portion.
  • the sealing layer (not shown) is formed on the surface of the peripheral portion of the transparent resin layer 48 exposed from between the first insulating layer 40 and the protective substrate 44, and the first and second lead wiring parts (not shown).
  • the transparent resin layer 48 and the exposed surface not covered with the flexible printed wiring board are respectively disposed.
  • FIGS. 6A and 6B are schematic views of a fifth embodiment of the capacitive touch panel of the present invention.
  • 6A is a cross-sectional view of the capacitive touch panel 500
  • FIG. 6B is a partial plan view.
  • FIG. 6 is a schematic view for facilitating understanding of the layer configuration of the capacitive touch panel 500, and is not a drawing that accurately represents the arrangement of each layer.
  • the capacitive touch panel 500 includes a first electrode part 12, a first lead wiring part (not shown), a second electrode part 20, a second lead wiring part (not shown), and a first electrode on the surface of the first insulating layer 40. 2
  • the insulating layer 42, the jumper 46, the transparent resin layer 48, the protective substrate 44, the sealing layer which is not shown in figure, and the flexible printed wiring board which is not shown in figure are provided.
  • the first electrode portion 12 is patterned on the first insulating layer 40 so as to be connected in the Y-axis direction
  • the second electrode portion 20 includes the first electrode portion 12 and the first electrode portion 12.
  • the second insulating layer 42 is disposed so as to cover the intersecting portion, and is electrically connected in the X-axis direction via a jumper 46 provided so as to straddle the second insulating layer 42.
  • One end of a first lead wiring portion and a second lead wiring portion are connected to the first electrode portion 12 and the second electrode portion 20, respectively.
  • the transparent resin layer 48 is formed on the first electrode part 12 and the second electrode part 20 and the first lead wiring part (not shown) so that the other ends of the first lead wiring part and the second lead wiring part (not shown) are exposed. And disposed on the second lead-out wiring portion.
  • the protective substrate 44 is disposed on the transparent resin layer 48. Note that a flexible printed wiring board (not shown) is connected to the other ends of the first lead wiring portion and the second lead wiring portion.
  • the sealing layer (not shown) is formed on the surface of the peripheral portion of the transparent resin layer 48 exposed from between the first insulating layer 40 and the protective substrate 44, and the first and second lead wiring parts (not shown). The transparent resin layer 48 and the exposed surface not covered with the flexible printed wiring board are respectively disposed.
  • FIGSixth Embodiment> 7A and 7B are schematic views of a sixth embodiment of the capacitive touch panel of the present invention.
  • 7A is a cross-sectional view of the capacitive touch panel 600
  • FIG. 7B is a partial plan view.
  • FIG. 7 is a schematic view for facilitating understanding of the layer configuration of the capacitive touch panel 600, and is not a drawing that accurately shows the arrangement of each layer.
  • the capacitive touch panel 600 includes an insulating layer 10, a plurality of electrode portions 54 and a plurality of lead-out wiring portions 56 disposed on one main surface of the insulating layer 10, a transparent resin layer 48, a protective substrate 44, a sealing layer (not shown), and a flexible printed wiring board (not shown).
  • the electrode part 54 is a member similar to the 1st electrode part 12 and the 2nd electrode part 20 which were mentioned above, The definition is as above-mentioned.
  • the lead-out wiring section 56 is a member similar to the first lead-out wiring section 14 and the second lead-out wiring section 22 described above, and the definition thereof is as described above.
  • the electrode portion 54 has a substantially isosceles triangular shape, and is disposed on the insulating layer 10 so that the plurality of electrode portions 54 are alternately positioned.
  • One end of each of the plurality of lead wiring portions 56 is connected to the corresponding electrode portion 54.
  • the transparent resin layer 48 is disposed on the electrode part 54 and the lead-out wiring part 56 so that the other end of the lead-out wiring part 56 is exposed.
  • the protective substrate 44 is disposed on the transparent resin layer 48.
  • a flexible printed wiring board (not shown) is connected to the other end of the lead wiring part 56.
  • the sealing layer (not shown) is formed on the surface of the peripheral portion of the transparent resin layer 48 exposed from between the insulating layer 10 and the protective substrate 44, and on the transparent resin layer 48 and the flexible printed wiring board of the lead-out wiring portion 56. Each is arranged on an uncovered exposed surface.
  • the capacitive touch panel of the present invention described above can be applied to various uses, for example, an input device.
  • the structure of the input device including the capacitive touch panel of the present invention is not particularly limited, for example, an embodiment shown in FIG.
  • the mode illustrated in FIG. 8A corresponds to a so-called out-cell mode, and includes a backlight 110, a first polarizing plate 120, a liquid crystal display (LCD) 130, a second polarizing plate 140, and the electrostatic of the present invention.
  • An input device 170a including the capacitive touch panel 150 and the protective substrate 160 in this order can be given.
  • a spacer (not shown) is arranged between the second polarizing plate 140 and the capacitive touch panel 150.
  • the mode of the input device is not limited to the mode of FIG. 8A.
  • An input device 170b that includes the second polarizing plate 140, the adhesive layer 180, the capacitive touch panel 150 of the present invention, and the protective substrate 160 in this order is exemplified.
  • the backlight 110, the first polarizing plate 120, the liquid crystal display (LCD) 130, the capacitive touch panel 150 of the present invention An input device 170c including the two polarizing plates 140 and the protective substrate 160 in this order can be given.
  • the capacitive touch panel of the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention. Further, in combination with the techniques disclosed in JP2011-113149A, JP2011-129501A, JP2011-129112A, JP2011-134311A, JP2011-175628A, etc. as appropriate. Can be used.
  • Example 1> (Preparation of silver halide emulsion) To the following 1 liquid maintained at 38 ° C. and pH 4.5, an amount corresponding to 90% of each of the following 2 and 3 liquids was simultaneously added over 20 minutes while stirring to form 0.16 ⁇ m core particles. Subsequently, the following 4 and 5 solutions were added over 8 minutes, and the remaining 10% of the following 2 and 3 solutions were added over 2 minutes to grow to 0.21 ⁇ m. Further, 0.15 g of potassium iodide was added and ripened for 5 minutes to complete the grain formation.
  • the emulsion after washing with water and desalting was adjusted to pH 6.4 and pAg 7.5, and gelatin 3.9 g, sodium benzenethiosulfonate 10 mg, sodium benzenethiosulfinate 3 mg, sodium thiosulfate 15 mg and chloroauric acid 10 mg were added.
  • Chemical sensitization to obtain optimum sensitivity at 0 ° C. 100 mg of 1,3,3a, 7-tetraazaindene as stabilizer and 100 mg of proxel (trade name, manufactured by ICI Co., Ltd.) as preservative It was.
  • the finally obtained emulsion contains 0.08 mol% of silver iodide, and the ratio of silver chlorobromide is 70 mol% of silver chloride and 30 mol% of silver bromide. It was a silver iodochlorobromide cubic grain emulsion having a coefficient of 9%.
  • Photosensitive layer forming step After subjecting a polyethylene terephthalate (PET) film having a thickness of 100 ⁇ m to corona discharge treatment, a gelatin layer having a thickness of 0.1 ⁇ m as an undercoat layer on both sides of the PET film and an optical density of about 1.0 on the undercoat layer. And an antihalation layer containing a dye which is decolorized by alkali in the developer. On the antihalation layer, the composition for forming a photosensitive layer was applied, a gelatin layer having a thickness of 0.15 ⁇ m was further provided, and a PET film having a photosensitive layer formed on both sides was obtained. The obtained film is referred to as film A.
  • the formed photosensitive layer had a silver amount of 6.0 g / m 2 and a gelatin amount of 1.0 g / m 2 .
  • the L / S (line / space) of the lead-out wiring part was 100 ⁇ m / 100 ⁇ m.
  • the outer shape of the laminate is adjusted to the same size as a 0.7mm thick soda lime glass with a sensor size. After FPC is crimped and joined with Sony Chemicals' ACF (CP906AM-25AC), the soda lime is placed on the top side. Glass was pasted to make a touch panel.
  • Sony Chemicals' ACF CP906AM-25AC
  • FG-3030C-20 (Fluoro Technology, fluorinated surface treatment agent) was degassed by filtering with a disk syringe (Whatman, membrane: PTFE, pore size: 0.2 ⁇ m). Next, the touch panel produced by the above method was immersed for 10 seconds in degassed FG-3030C-20 (Fluorotechnology, fluorine surface treatment agent). Thereafter, the touch panel was pulled up under the condition of 35 mm / second, dried at room temperature for 30 minutes, and a touch panel coated with a sealing layer formed of FG-3030C-20 was obtained.
  • FG-3030C-20 had a surface tension of 19 mN / m and a viscosity of 25 cps.
  • the formed sealing layer had a thickness of 5 ⁇ m.
  • the thickness of the sealing layer is an average value obtained by measuring the thicknesses of 20 or more locations using an optical interference film thickness meter (K-MAC, ST-2000DLXn) and arithmetically averaging them.
  • K-MAC, ST-2000DLXn optical interference film thickness meter
  • the average number of pinholes having a diameter of 1 ⁇ m or more present on the surface of the sealing layer was measured according to the method described above.
  • the chlorine ion permeability coefficient of the sealing layer was measured according to the method described above. The results are summarized in Table 1.
  • Example 2 The same procedure as in Example 1 except that the pulling speed after being immersed in FG-3030C-20 (Fluoro Technology, fluorinated surface treatment agent) for 10 seconds was changed from 35 mm / second to 10 mm / second. A touch panel having a sealing layer formed thereon was manufactured and various evaluations were performed. The results are summarized in Table 1.
  • Example 3 Instead of filtering with a disk syringe (manufactured by Whatman, membrane: PTFE, pore size: 0.2 ⁇ m), a touch panel on which a sealing layer was formed in accordance with the same procedure as in Example 1 except that defoaming was performed by ultrasonic treatment. Manufactured and evaluated in various ways. The results are summarized in Table 1. The ultrasonic treatment was performed for 20 minutes using an ultrasonic vacuum deaerator VSD-101 (manufactured by Chiyoda Electric Co.).
  • Example 4 Instead of using FG-3030C-20, Araldite Standard (Ciba Geigy, epoxy resin) is used, and instead of coating the entire surface of the sealing layer by dipping, the entire surface of the sealing layer is coated by a dispenser and cured at room temperature.
  • Araldite Standard Ciba Geigy, epoxy resin
  • a touch panel on which a sealing layer was formed was produced according to the same procedure as in Example 3 except that coating was performed, and various evaluations were performed. The results are summarized in Table 1.
  • Example 5 A touch panel in which a sealing layer is formed according to the same procedure as in Example 4 except that HIPEC-R6101 (manufactured by Toray Dow Corning, silicone resin) is used instead of Araldite Standard (manufactured by Ciba Geigy, epoxy resin) Were manufactured and evaluated in various ways. The results are summarized in Table 1.
  • Saran Resin R204 Asahi Kasei Co., Ltd., vinyl chloride resin
  • Example 1 A touch panel (without a sealing layer) was manufactured in accordance with the same procedure as in Example 1 except that the immersion in FG-3030C-20 was not performed and the sealing layer was not formed, and various evaluations were performed. The results are summarized in Table 1.
  • Example 2 A touch panel on which a sealing layer was formed was produced according to the same procedure as in Example 1 except that FG-3030C-20 was not defoamed, and various evaluations were performed. The results are summarized in Table 1.
  • Example 7 (Preparation of silver nanowire dispersion)
  • the silver nanowire was produced in accordance with the synthesis method (publication number US2008 / 0210052, EXAMPLE 8) described in the US application patent of CAMBRIOS. Detailed conditions are shown below.
  • reaction solution A 1.9 g of silver nitrate was dissolved in 115.79 g of 1,2-propylene glycol to prepare reaction solution A.
  • a reaction liquid C was prepared by dissolving 0.288 g of tetrabutylammonium chloride (Aldrich) in 199.71 g of 1,2-propylene glycol.
  • the shape of the obtained silver nanowire was observed with a transmission electron microscope.
  • a transmission electron microscope image of the silver nanowire is shown in FIG.
  • the average wire diameter was 32.14 nm (measured number: 161, variation coefficient: 14.6%)
  • the average wire length was 7.92 ⁇ m (measured number: 237, variation coefficient: 29.3%).
  • a histogram of the measured wire diameter and wire length is shown in FIG.
  • composition for forming conductive layer was prepared according to the coating liquid formulation (publication number US2008 / 0259262, EXAMPLE 2) described in the US application patent of CAMBRIOS. Detailed conditions are shown below.
  • a composition for forming a conductive layer was prepared so as to have the following weight%.
  • Silver nanowire 0.2% by weight HPMC (hydroxypropyl methylcellulose): 0.4% by weight
  • Triton-X100 0.025% by weight
  • Water 49.375% by weight
  • Isopropanol 50.0% by weight
  • the prepared composition for forming a conductive layer was applied on the surface of a polyethylene terephthalate film having a thickness of 125 ⁇ m by using a slit die coat with a shim material (shim thickness of 50 ⁇ m), and dried at 100 ° C. for 1 minute. “Conductive layer A” was formed. The surface resistance value of the conductive layer A was measured by the Lorester four-terminal method and found to be 50 ⁇ / ⁇ .
  • the prepared protective layer-forming composition was applied onto the conductive layer A using a slit die coat equipped with a shim made of sus (shim thickness 50 ⁇ m), dried at 120 ° C. for 2 minutes, and protected to 800 nm. A layer was provided to form a conductive laminate.
  • the patterning of the conductive layer was performed with reference to a general patterning method for the ITO conductive film. Detailed conditions are shown below.
  • first electrode pattern (first electrode part)
  • An etching mask material was formed on the surface of the conductive laminate obtained by the above method by a negative photoresist method, and immersed in an etching solution for dissolving silver, thereby forming a conductive portion and a nonconductive portion of the conductive layer. Specifically, it was performed as follows.
  • binder (A-1)- MAA (methacrylic acid; 7.79 g) and BzMA (benzyl methacrylate; 37.21 g) are used as monomer components constituting the copolymer, and AIBN (2,2′-azobis (isobutyro) is used as a radical polymerization initiator. Nitrile); 0.5 g), and these are polymerized in a solvent PGMEA (propylene glycol monomethyl ether acetate; 55.00 g) to give a PGMEA solution (solid) of the binder (A-1) represented by the following formula
  • the partial concentration was 45% by mass).
  • the polymerization temperature was adjusted to 60 to 100 ° C.
  • the molecular weight was measured using gel permeation chromatography (GPC). As a result, the weight average molecular weight (Mw) in terms of polystyrene was 30,000, and the molecular weight distribution (Mw / Mn) was 2.21.
  • photosensitive composition (1) 3.80 parts by mass of binder (A-1) (solid content: 40.0% by mass, PGMEA solution), 1.59 parts by mass of KAYARAD DPHA (manufactured by Nippon Kayaku Co., Ltd.) as a photosensitive compound, as photopolymerization initiator IRGACURE 379 (manufactured by Ciba Specialty Chemicals Co., Ltd.) 0.159 parts by mass, EHPE-3150 (manufactured by Daicel Chemical Co., Ltd.) 0.150 parts by mass as a cross-linking agent, Megafac F781F (manufactured by DIC Corporation) 0.002 1 part by mass and 19.3 parts by mass of PGMEA were added and stirred to prepare a photosensitive composition (1).
  • binder A-1 (solid content: 40.0% by mass, PGMEA solution)
  • KAYARAD DPHA manufactured by Nippon Kayaku Co., Ltd.
  • IRGACURE 379 photopolymerization
  • the photosensitive composition (1) was applied with a bar so as to have a dry film thickness of 5 ⁇ m, and dried in an oven at 150 ° C. for 5 minutes.
  • This substrate was exposed to 400 mJ / cm 2 (illuminance: 50 mW / cm 2 ) with a high-pressure mercury lamp i-line (365 nm) from the exposed glass mask.
  • the exposed substrate was subjected to shower development (60 seconds) with a 1% aqueous sodium hydroxide solution (35 ° C.). The shower pressure was 0.08 MPa, and the time until the stripe pattern appeared was 30 seconds.
  • the mask which can form the sensor electrode of an electrostatic capacitance type touch panel was used for the exposure glass mask.
  • etching solution nitric acid
  • Etching is performed by immersing in an etching solution adjusted to 35 ° C. for 2 minutes, rinsing with a shower of pure water, then blowing off water on the surface of the sample with an air knife, drying at 60 ° C. for 5 minutes, and a pattern with a resist pattern A conductive laminate was produced.
  • the 2nd electrode pattern member was produced by the same method except the direction differing from the formation method of the 1st electrode pattern 90 degrees. As a result of measuring the inter-terminal resistance value of the electrode part of the obtained second electrode pattern member with a tester, it showed a desired resistance value, and the insulation resistance value between adjacent electrode parts was 10 M ⁇ or more.
  • the lead-out wiring (peripheral wiring) formed by the patterning and connected to the first electrode pattern in the first electrode pattern member and the second electrode pattern in the second electrode pattern member was produced as follows. That is, a silver paste (Dotite FA-401CA, manufactured by Fujikura Kasei) was printed by a screen printer and then cured by annealing at 130 ° C. for 30 minutes to form a lead wiring (peripheral wiring).
  • the L / S (line / space) of the lead wiring was 100 ⁇ m / 100 ⁇ m, and the insulation resistance value between adjacent lead wirings was 10 M ⁇ or more.
  • the screen printing plate used was a printing plate capable of forming a capacitive touch panel peripheral wiring.
  • 3M OCA (# 8146-4: 100 micrometers thick)
  • Kimoto hard coat film (G1SBF: 50 micrometers thick)
  • the touch panel was prepared by laminating and pasting 3M OCA (# 8146-4: 100 micrometer thickness) and soda lime glass on the polyethylene terephthalate film of the second electrode pattern member in the laminate.
  • a sealing layer was formed according to the same procedure as in Example 1 to obtain a touch panel in which the sealing layer formed of FG-3030C-20 was coated on the entire surface.
  • Various evaluation was performed about the touch panel in which the obtained sealing layer was formed. The results are summarized in Table 1.
  • Example 8> (Formation of first electrode pattern (first electrode part)) An etching mask material is formed by a negative photoresist system on the surface of the ITO transparent conductive material (ALDRICH, 639281-1EA, 100 ⁇ / ⁇ ), and immersed in an etching solution that dissolves ITO. A non-conductive part was formed.
  • the photosensitive composition (1) prepared in Example 7 was applied with a bar so as to have a dry film thickness of 5 ⁇ m, and dried in an oven at 150 ° C. for 5 minutes.
  • the substrate was exposed to 400 mJ / cm 2 (illuminance 50 mW / cm 2 ) with a high-pressure mercury lamp i-line (365 nm) from above the exposure glass mask.
  • the exposed substrate was subjected to shower development (60 seconds) with a 1% aqueous sodium hydroxide solution (35 ° C.). The shower pressure was 0.08 MPa, and the time until the stripe pattern appeared was 30 seconds.
  • the mask which can form the sensor electrode of an electrostatic capacitance type touch panel was used for the exposure glass mask.
  • -Etching process The conductive member with a resist pattern was immersed in an etching solution for ITO. Etching is performed by immersing in an etching solution adjusted to 35 ° C. for 2 minutes, rinsing with a shower of pure water, then blowing off water on the surface of the sample with an air knife, drying at 60 ° C. for 5 minutes, and a pattern with a resist pattern A conductive member was produced.
  • the 2nd electrode pattern member was produced by the same method except the direction differing from the formation method of the 1st electrode pattern 90 degrees. As a result of measuring the inter-terminal resistance value of the electrode part of the obtained second electrode pattern member with a tester, it showed a desired resistance value, and the insulation resistance value between adjacent electrode parts was 10 M ⁇ or more.
  • the lead-out wiring (peripheral wiring) formed by the patterning and connected to the first electrode pattern in the first electrode pattern member and the second electrode pattern in the second electrode pattern member was produced as follows. That is, a silver paste (Dotite FA-401CA, manufactured by Fujikura Kasei) was printed by a screen printer and then cured by annealing at 130 ° C. for 30 minutes to form peripheral wiring. Note that the L / S (line / space) of the lead-out wiring was 100 ⁇ m / 100 ⁇ m, and the insulation resistance value between adjacent lead-out wirings was 10 M ⁇ or more.
  • the screen printing plate used was a printing plate capable of forming a capacitive touch panel peripheral wiring.
  • the first electrode pattern member and the second electrode pattern member manufactured by the above method face each other, and a 3M OCA (# 8146-4: 100 micrometer thickness) is disposed between them.
  • the electrode pattern member and the second electrode pattern member were bonded together to obtain a laminate.
  • the OCA used here is such that the FPC crimping part can be crimped in advance so that the other end of the lead wiring of the first electrode pattern member and the second electrode pattern member is exposed.
  • the outer shape was adjusted to approximately the same size as 0.7 mm thick soda lime glass having a sensor size of approximately FPC, and FPC was pressure bonded to the laminate using ACF (CP906AM-25AC) manufactured by Sony Chemicals.
  • 3M OCA (# 8146-4: 100 ⁇ m thickness) and Kimoto hard coat film (G1SBF: 50 ⁇ m thickness) are sequentially stacked on the surface of the laminate on the first electrode pattern member side.
  • OCA (# 8146-4: 100 micrometers thickness) manufactured by 3M and soda lime glass were pasted on the surface on the second electrode pattern member side in the laminated body to produce a touch panel.
  • a sealing layer was formed according to the same procedure as in Example 1 to obtain a touch panel in which the sealing layer formed of FG-3030C-20 was coated on the entire surface.
  • Various evaluation was performed about the touch panel in which the obtained sealing layer was formed. The results are summarized in Table 1.
  • the average number of pinholes having a sealing layer but having a sealing layer but having a sealing layer but having a diameter of 1 ⁇ m or more is 5 (pieces / mm 2 ).
  • Examples 1 to 8 having a predetermined sealing layer all showed excellent high temperature and high humidity reliability and high yield.
  • Examples 1, 3 and 6 to 8 using a fluorine-based resin or a vinyl chloride resin for the sealing layer showed higher yields.
  • Examples 1, 3, 7 and 8 using a fluorine-based resin for the sealing layer showed a higher yield.
  • Example 1 in which the thickness of the sealing layer was 1 ⁇ m or more showed better high-temperature and high-humidity reliability and higher yield. From the comparison with Examples 1 and 3, both the defoaming by filtration and the defoaming by the ultrasonic defoaming machine showed excellent high temperature and high humidity reliability and high yield.

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Abstract

L'invention a pour objectif de fournir un écran tactile de capacité électrostatique dans lequel est empêchée l'apparition de défauts de fonctionnement lors d'une exposition sous un environnement à haute température et à haute humidité, et qui présente un rendement élevé. L'écran tactile de capacité électrostatique est équipé : d'une couche d'isolation ; d'une pluralité de parties électrode disposée sur au moins une des faces principales de ladite couche d'isolation ; d'une pluralité de parties de câblage d'extraction qui est disposée sur la face principale de ladite couche d'isolation sur laquelle est disposée ladite pluralité de parties électrode, et dont une partie extrémité de chacune d'entre elles, est connectée à ladite partie électrode correspondante ; d'une couche de résine transparente disposée sur lesdites parties électrode et lesdites parties de câblage d'extraction de manière à exposer les autres parties extrémité desdites parties de câblage d'extraction ; et d'un substrat disposé sur ladite couche de résine transparente. Au moins une couche de scellement est disposée en un endroit prédéfini. Le coefficient de perméation d'ions chlore de ladite couche de scellement, est inférieur ou égal à 1,0mgCl-(100μm).cm-2・y-1. Le nombre moyen de trous d'épingle de diamètre supérieur ou égal à 1μm présents à la surface de ladite couche de scellement, est inférieur ou égal à 5/mm2.
PCT/JP2013/079098 2012-10-31 2013-10-28 Écran tactile de capacité électrostatique ainsi que procédé de fabrication de celui-ci, et dispositif d'entrée WO2014069392A1 (fr)

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JP2012240084A JP5871774B2 (ja) 2012-10-31 2012-10-31 静電容量式タッチパネルおよびその製造方法、入力デバイス

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TWI674466B (zh) * 2018-07-30 2019-10-11 友達光電股份有限公司 顯示面板及其製造方法

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JP2015225428A (ja) * 2014-05-27 2015-12-14 凸版印刷株式会社 タッチパネル及びそれを用いたタッチ式情報入力画像表示装置
KR20150136410A (ko) * 2014-05-27 2015-12-07 삼성전기주식회사 터치센서 모듈
TWI726843B (zh) * 2014-05-30 2021-05-11 日商半導體能源研究所股份有限公司 觸控面板
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CN109712529A (zh) 2017-10-26 2019-05-03 元太科技工业股份有限公司 可挠性电子装置
TWI648717B (zh) * 2017-10-26 2019-01-21 元太科技工業股份有限公司 可撓性電子裝置
CN110811604B (zh) * 2019-10-10 2022-07-22 杭州美善明康生物科技有限责任公司 一种柔性心电图电极贴片及制备方法
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