WO2013180143A1 - 視認性と耐久性に優れた静電容量透明タッチシート - Google Patents
視認性と耐久性に優れた静電容量透明タッチシート Download PDFInfo
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- WO2013180143A1 WO2013180143A1 PCT/JP2013/064809 JP2013064809W WO2013180143A1 WO 2013180143 A1 WO2013180143 A1 WO 2013180143A1 JP 2013064809 W JP2013064809 W JP 2013064809W WO 2013180143 A1 WO2013180143 A1 WO 2013180143A1
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- electrode
- substrate
- capacitive
- touch sheet
- transparent touch
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/40—Radiating elements coated with or embedded in protective material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
- H01R43/24—Assembling by moulding on contact members
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0284—Details of three-dimensional rigid printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0014—Shaping of the substrate, e.g. by moulding
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/101—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by casting or moulding of conductive material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/4007—Surface contacts, e.g. bumps
- H05K3/4015—Surface contacts, e.g. bumps using auxiliary conductive elements, e.g. pieces of metal foil, metallic spheres
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14114—Positioning or centering articles in the mould using an adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3431—Telephones, Earphones
- B29L2031/3437—Cellular phones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09118—Moulded substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/0999—Circuit printed on or in housing, e.g. housing as PCB; Circuit printed on the case of a component; PCB affixed to housing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/1031—Surface mounted metallic connector elements
- H05K2201/10318—Surface mounted metallic pins
Definitions
- the present invention relates to a capacitive transparent touch sheet used for a capacitive touch panel, and more particularly, an electrode formed on a capacitive transparent touch sheet is patterned when the capacitive transparent touch sheet is attached to a transparent substrate.
- the present invention relates to a capacitive transparent touch sheet that is invisible and highly durable.
- FIG. 7 is an exploded perspective view of a conventional capacitive touch panel
- FIG. 8 is a plan view of the conventional capacitive touch panel.
- a conventional capacitive touch panel 200 has an upper conductive sheet ⁇ composed of an upper substrate 100 and an upper electrode 101, and a lower conductive sheet ⁇ composed of a lower substrate 110 and a lower electrode 111. It consists of a combined configuration.
- the upper conductive sheet ⁇ and the lower conductive sheet ⁇ are pasted so that the upper electrode 101 and the lower electrode 111 intersect (for example, Patent Document 1). *
- the upper electrode 101 and the lower electrode 111 are independently formed and both have a certain thickness. Referring to FIG. 8, therefore, the conventional capacitive touch panel 200 has a thickness where the upper electrode 101 and the lower electrode 111 intersect (intersection portion ⁇ between the upper electrode and the lower electrode). It becomes thicker than the thickness of the portion ⁇ that is not formed.
- intersection portion ⁇ is thicker and convex than the other portions, there is a problem that fatigue accumulates after many uses and a short circuit occurs during use.
- the thickness of the upper electrode or the lower electrode is reduced to make the step generated at the intersection part as small as possible and the touch panel visibility is improved. Since the resistance value of the electrode increases as the thickness of the touch panel is reduced, there is a problem that the sensitivity of the touch panel decreases.
- the present invention is to solve the above-mentioned conventional problems, and to provide a capacitive transparent touch sheet excellent in visibility and durability without changing the sensitivity and size of the touch panel.
- the capacitive transparent touch sheet of the present invention includes a substrate, a plurality of independent first electrodes formed on the substrate, and a shape of the first electrode having a strip shape, and a surface of the substrate on which the first electrode is formed.
- a plurality of second electrodes formed on the opposite surface so as to intersect the first electrode and having a strip shape; and an insulating portion formed continuously with the second electrode and having the same thickness as the second electrode;
- the thickness of the second electrode is a capacitive transparent touch sheet that is thicker than the thickness of the first electrode.
- variety of a 1st electrode is an electrostatic capacitance transparent touch sheet wider than the width
- the transparent metal oxide is a capacitive transparent touch sheet made of ITO.
- the metal which comprises the said electroconductive nanowire is an electrostatic capacitance transparent touch sheet which is silver.
- the capacitive transparent touch sheet has a hard coat layer formed on a surface of the second substrate opposite to the surface on which the second electrode is formed.
- the capacitive transparent touch panel of the present invention is a capacitive transparent touch panel in which a transparent base material is bonded onto the first substrate of the capacitive touch sheet.
- the capacitive transparent touch sheet of the present invention is to provide a capacitive transparent touch sheet excellent in visibility and durability without changing the sensitivity and size of the touch panel.
- FIG. 1 It is a top view of the electrostatic capacitance transparent touch sheet of this invention. It is a cross-sectional enlarged view of FIG. It is a cross-sectional enlarged view of FIG. It is a cross section when sticking the electrostatic capacitance transparent touch sheet of this invention to a transparent base material. It is sectional drawing of the electrostatic capacitance transparent touch sheet of this invention. It is sectional drawing of the electrostatic capacitance transparent touch panel of this invention. It is a disassembled perspective view of the conventional electrostatic capacitance transparent touch sheet. It is a top view of the conventional electrostatic capacitance transparent touch sheet.
- FIG. 1 is an exploded perspective view of the capacitive transparent touch sheet 1 according to the first embodiment.
- the dotted line portion indicates the structure on the back side of the substrate 1.
- 2 is a cross-sectional view taken along the line CC ′ of the capacitive touch sheet 1 of FIG. 3 is a DD ′ cross-sectional view of the capacitive transparent touch sheet 1 of FIG.
- the CC ′ cross-section is a cross-sectional view of the capacitive transparent touch sheet 1 cut on the second electrode 4, and the DD ′ cross-section is the capacitive transparent touch sheet 1 on the insulating portion 5. It is sectional drawing when cut
- FIG. 4 is a cross-sectional view when the capacitive transparent touch sheet 1 according to Embodiment 1 is attached to the transparent substrate 7.
- a capacitive transparent touch sheet 1 includes a substrate 2, a plurality of first electrodes 3 independently formed on one surface of the substrate 2, and a shape of the first electrode 3, and a first electrode 3.
- a plurality of first routing circuits X for electrical connection to the outside and a back surface side of the surface of the substrate 2 on which the first electrode 3 is formed are formed so as to intersect the first electrode 3 and the shape thereof is a strip shape.
- a second routing circuit Y that includes two electrodes 4 and an insulating portion 5 that is formed continuously with the second electrode 4 and has the same thickness as the second electrode 4, and performs electrical connection from the second electrode 5 to the outside. And.
- the capacitive transparent touch sheet 1 of the first embodiment has the insulating portion 5 and the second electrode of the substrate 2 formed as compared with the conventional touch sheet. It differs in that it is formed to have the same thickness as the second electrode 5 on the side surface. Another difference is that the insulating portion 5 is formed continuously with the second electrode. With this configuration, the capacitive transparent touch sheet 1 of the first embodiment has a smooth surface on the second electrode 4 side of the substrate 2. Therefore, the level
- the surface of the substrate 2 on which the second electrode is formed becomes smooth, the difference between the thickness of the intersection of the first electrode 3 and the second electrode 5 and the thickness of the other portion becomes small.
- fatigue is less likely to accumulate at the intersections than the conventional capacitive transparent touch sheet, it is possible to suppress a problem that a short circuit occurs during use of the capacitive transparent touch sheet.
- the first electrode 3 is formed on one surface of the substrate 2 and the second electrode 4 is formed on the surface opposite to the first surface.
- the material of the substrate examples include resin films such as acrylic, polycarbonate, polyester, polybutylene terephthalate, polypropylene, polyamide, polyurethane, polyvinyl chloride, polyvinyl fluoride, and polyimide.
- the thickness of the substrate can be appropriately set in the range of 5 to 800 ⁇ m. If the thickness is less than 5 ⁇ m, the strength as a layer is insufficient and it is torn when it is peeled off, making it difficult to handle. Flexibility cannot be obtained.
- the first electrode and the second electrode are each composed of a plurality of strip-shaped electrodes, but the shape of the electrodes is not limited to a strip shape.
- the first electrode may be composed of a plurality of rhombus electrodes connected in a diagonal direction
- the second electrode may be composed of a plurality of rhombus electrodes connected in a diagonal direction.
- the rhombus electrode constituting the first electrode and the rhombus electrode constituting the second electrode may be arranged so as not to overlap each other when viewed from the direction perpendicular to the surface.
- first electrode and the second electrode By arranging the first electrode and the second electrode so as not to overlap with each other in this way, it is possible to prevent the detection sensitivities in the horizontal and vertical axes from affecting each other.
- a plurality of first electrodes and a plurality of second electrodes are provided.
- the number is not limited to this, and an arbitrary number can be provided.
- the material of the first electrode and the second electrode can be appropriately used as long as it has conductivity, but as a combination of the materials constituting the first electrode and the second electrode, the first electrode is composed of a transparent metal oxide.
- the second electrode is preferably composed of a conductive material including a photocurable resin binder and conductive nanofibers.
- conductive nanofibers include metal nanowires prepared by continuously applying an applied voltage or current from the tip of a probe to the surface of a precursor carrying metal ions such as gold, silver, platinum, copper, and palladium. And peptide nanofibers obtained by adding gold particles to nanofibers formed by self-assembly of peptides or derivatives thereof. Further, even blackish conductive nanofibers such as carbon nanotubes can be used if there is a difference in shadow color or reflectivity.
- the photocurable resin binder include urethane acrylate and cyanoacrylate.
- a more preferable combination is a case where ITO is used as a transparent metal oxide, silver nanofibers are used as conductive nanofibers, and urethane acrylate is used as a photocurable resin binder.
- This configuration increases the transparency of the first electrode and the second electrode. Furthermore, the first electrode is more transparent than the second electrode. As a result, the shape of the first electrode, which is originally highly transparent and difficult to see the pattern, is concealed by the second electrode, which is less transparent than the first electrode. . Further, the problem of pattern appearance does not occur for the second electrode. In the region adjacent to the second electrode, an insulating part having the same thickness and almost the same material as that of the second electrode is disposed, and the transparency and refractive index between the second electrode and the insulating part are arranged. This is because there is almost no difference. As a result, when the first electrode and the second electrode are made of the above-described materials, it is possible to produce a capacitive transparent touch sheet that is highly transparent as a whole and hardly makes the electrode pattern visible.
- the thicknesses of the first electrode and the second electrode can be appropriately set in the range of several tens of nm to several hundreds of nm. When the thickness is less than several tens of nm, the strength as a layer is insufficient, and when the thickness is more than several hundred nm, flexibility becomes sufficient.
- the thickness of the second electrode is preferably larger than the thickness of the first electrode.
- the second electrode 4 becomes the first electrode when the capacitive transparent touch sheet 1 is bonded to the transparent substrate 6. 3 thickness can be absorbed.
- the shape of the first electrode 3 is not reflected on the surface of the capacitive transparent touch sheet 1 (the surface on the second electrode side 4 of the substrate 2). Therefore, the surface of the capacitive transparent touch sheet 1 (the surface on the second electrode side 4 of the substrate 2) is smooth.
- the capacitive transparent touch sheet 1 is irradiated with light, the light is not refracted on the surface, so that the entire capacitive transparent touch sheet 1 does not appear to wave. Furthermore, fatigue of the electrode at the intersection of the first electrode 3 and the second electrode 4 can also be suppressed.
- the thickness of the second electrode is preferably the same as that of the insulating portion and in the range of 1 ⁇ m to 50 ⁇ m. If the thickness is less than 1 ⁇ m, the conductivity of the second electrode may be insufficient, and if the thickness exceeds 50 ⁇ m, the second electrode becomes too thick, resulting in a problem that the capacitive transparent touch sheet cannot be reduced in size.
- the width of the second electrode is preferably wider than the width of the insulating part. If the width of the second electrode is narrower than the width of the insulating portion, the portion that functions as a sensor is narrowed, which causes a problem that a highly sensitive capacitive transparent touch sheet cannot be created.
- the width of the insulating part is preferably about 10 ⁇ m to 100 ⁇ m.
- the lower limit is set to 10 ⁇ m.
- the upper limit value is set to 100 ⁇ m because if the width exceeds 100 ⁇ m, the insulating part can be visually recognized when illuminated by illumination, or the sensitivity of the capacitive transparent touch sheet is lowered. is there.
- the depth of the insulating part is the same as the thickness of the second electrode, and the material is the same as the binder resin constituting the second electrode.
- the adhesive layer is a layer for attaching the first conductive sheet and the second conductive sheet.
- a heat-sensitive or pressure-sensitive resin suitable for the type of the first substrate and the second substrate is used.
- a resin such as PMMA resin, PC, polystyrene, PA resin, poval resin, or silicon resin is used.
- the adhesive layer is formed on the first substrate or the second substrate by a gravure coating method, a roll coating method, a comma coating method, a gravure printing method, a screen printing method, an offset printing method, or the like.
- FIG. 5 is a cross-sectional view of the capacitive transparent touch sheet 1 according to another example of the first embodiment.
- the capacitive transparent touch sheet 1 of this embodiment has a hard coat layer 10 formed on the surface of the substrate 2 on which the second electrode 4 is formed via an adhesive layer 8 and a transparent film 9. ing.
- a hard-coat layer is a layer arrange
- the film thickness of the hard coat layer is preferably in the range of 1 ⁇ m to 20 ⁇ m.
- the film thickness of the hard coat layer is less than 1 ⁇ m, it is too thin to sufficiently exhibit the above function.
- the film thickness of the hard coat layer exceeds 20 ⁇ m, the hard coat layer is not dried immediately, which is not preferable from the viewpoint of production efficiency.
- a homopolymer of acrylic or methacrylic monomers such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, polybutyl acrylate, or a copolymer acrylic copolymer containing these monomers
- resins melamine resins, acrylic resins, urethane resins, epoxy resins, and the like can be used.
- two-component curable resins such as melamine, acrylic melamine, epoxy melamine, alkyd, urethane, acrylic, etc. and a mixture of these, or a combination with a curing agent such as isocyanate, polyester acrylate Polyester methacrylate, epoxy acrylate, epoxy methacrylate, urethane acrylate, urethane methacrylate, polyether acrylate, polyether methacrylate, polyol acrylate, melamine acrylate, melamine methacrylate and other monomers and prepolymers that have ethylenically unsaturated bonds
- Ultraviolet rays, electron beam curable resins, and the like can be used. When an ultraviolet curable resin is used, a photoinitiator is further added.
- the method for obtaining a capacitive transparent touch sheet includes the following steps.
- a substrate is prepared.
- a conductive layer made of ITO is formed on one surface of the substrate.
- the conductive layer is patterned using a photoresist method or the like, and the first electrode is formed on the substrate.
- a conductive layer containing conductive nanofibers is formed on the back side of the surface on which the first electrode of the substrate is formed using a printing method.
- An insulating layer is formed by removing a part of the conductive nanofibers by irradiating a part of the conductive layer including the conductive nanofibers with an energy ray, for example, a laser.
- the insulating part is formed, for example, by irradiating energy rays such as a carbon dioxide laser having a spot diameter of several tens of ⁇ m to pulverize the conductive nanofibers.
- a method of developing and removing uncured resin by using a photocurable resin as a binder resin to effect it by light irradiation, or a conductive layer A method in which an etching resist layer such as an alkyd resin, a polyester resin, or an epoxy resin is formed on a part, and then the whole surface is etched with an acid or alkali aqueous solution to remove a part of the conductive layer where the etching resist layer is not formed. There is.
- the width of the insulating portion cannot be reduced to a certain extent both when the photocurable resin is used as the binder resin and when the etching method is used. For this reason, the number of second electrodes that can be formed on the substrate is limited.
- the insulating portion is formed using a laser.
- an insulating portion having a width that cannot be recognized visually can be formed. Therefore, the number of second electrodes can be increased.
- the second electrode and the insulating portion are continuously formed, and the only difference between the materials constituting both is whether or not the conductive nanofiber is included. Therefore, the transmittance and the refractive index of the both hardly change. Therefore, the pattern appearance of the second electrode and the insulating part can be considerably reduced.
- the display screen has a uniform transmittance, and the pattern appearance of the first electrode, the second electrode, and the insulating portion is suppressed. A capacitive touch panel can be manufactured.
- FIG. 6 is a cross-sectional view of a capacitive touch panel 20 using the capacitive transparent touch sheet 1 of the first embodiment. Since the basic configuration of the capacitive touch panel 20 is the same as that of the first embodiment, differences from the first embodiment will be described below.
- the capacitive touch panel 20 of this embodiment the capacitive transparent touch sheet 1 of the first embodiment is bonded to the transparent substrate 6.
- the capacitive touch sheet 1 and the transparent base material 6 are bonded to the surface of the substrate 2 on the side where the first electrode 3 is formed and the transparent base material 6 via the adhesive layer 8.
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Abstract
Description
である。
図1は、実施の形態1に係る静電容量透明タッチシート1の分解斜視図である。なお、図1中、点線部分は基板1の裏面側の構造を示している。図2は、図1の静電容量タッチシート1のC-C’断面図である。図3は、図1の静電容量透明タッチシート1のD-D’断面図である。なお、C-C’断面は静電容量透明タッチシート1を第二電極4上で切断したときの断面図であり、D-D’断面は静電容量透明タッチシート1を絶縁部5上で切断したときの断面図である。図4は、実施の形態1の静電容量透明タッチシート1を透明基材7に貼着させるときの断面図である。
基板の材質としては、アクリル、ポリカーボネート、ポリエステル、ポリブチレンテレフタレート、ポリプロピレン、ポリアミド、ポリウレタン、ポリ塩化ビニル、ポリフッ化ビニル、ポリイミドなどの樹脂フィルムが挙げられる。基板の厚みは5~800μmの範囲で適宜設定可能である。厚さが5μm未満では、層としての強度が不足して剥離する際に破れたりするので取り扱いが困難となり、厚さが800μmを越える場合は、に剛性がありすぎて加工が困難となると共に、フレキシブル性が得られなくなる。
図1では、第一電極及び第二電極は、それぞれ短冊状の複数の電極によって構成されているが、電極の形状は短冊状に限られない。例えば、第一電極として対角方向で接続した複数の菱形電極によって構成し、第二電極として対角方向で接続した複数の菱形電極によって構成してもよい。この場合、第一電極を構成する菱形電極と、第二電極を構成する菱形電極とを、面に垂直な方向から見て互いに重複しないように配置してもよい。このように第一電極と第二電極とを重複しないように配置することによって、横軸及び縦軸方向の検出感度を互いに影響しないようにできる。また、図1では、第一電極及び第二電極を複数個設けているが、これに限らず、任意の数を設けることができる。
絶縁部の幅は、10μm~100μm程度が好ましい。下限値を10μmとするのは、絶縁部の幅を10μm未満にして形成しようとすると、使用中にイオンマイグレーションが発生し、電極間でショートが発生する。一方、上限値を100μmとするのは、100μmを超える幅にすると照明で照らされた場合に絶縁部が目視で認識できてしまう場合や、静電容量透明タッチシートの感度が低下してしまうめである。また、絶縁部の深さは、第二電極の厚みと同一であり、材料は、第二電極を構成するバインダー樹脂と同一である。
接着層は、第一導電シートと第二導電シートを貼着するための層である。接着層に用いる材料としては、第一基板、第二基板の種類に適した感熱性又は感圧性のある樹脂が使用される。具体的には、PMMA系樹脂、PC、ポリスチレン、PA系樹脂、ポバール系樹脂、シリコン系樹脂などの樹脂が使用される。なお、接着層は、グラビアコート法、ロールコート法、コンマコート法、グラビア印刷法、スクリーン印刷法、オフセット印刷法等により第一基板または第二基板の上に形成される。
ハードコート層は、静電容量透明タッチシートを用いてタッチパネルを作成するときにタッチパネルの表面に配置される層である。ハードコート層がタッチパネルの表面に配置されることにより、第一導電シートや第二導電シートを物理的または化学的な外傷から保護することができる。すなわち、タッチパネル表面の耐損傷性、耐薬品性などを向上させることができる。
<静電容量透明タッチシートの製造方法>
静電容量透明タッチシートを得る方法としては、以下の各工程を含む。
(a)基板を用意する。
(b)基板の上の一方面上に、ITOからなる導電層を形成する。
(c)フォトレジスト法などを用いて導電層をパターニングし、第一電極を基板の上に形成する。
(d)上記基板の第一電極が形成された面の裏面側に、印刷法を用いて導電性ナノファイバーを含む導電層を形成する。
(f)導電性ナノファイバーを含む導電層の一部にエネルギー線、例えばレーザーを照射して導電性ナノファイバーを一部除去した絶縁層を形成する。絶縁部は、例えば、スポット径数十μmの炭酸ガスレーザーなどのエネルギー線を照射して導電性ナノファイバーを粉砕することにより形成する。これにより基板の第一電極が形成された面の裏面に第二電極と絶縁部が形成された静電容量型タッチシートを得る。
図6は、実施の形態1の静電容量透明タッチシート1を用いた静電容量型タッチパネル20の断面図である。この静電容量型タッチパネル20の基本的な構成は、実施の形態1と同じであるので、以下では実施の形態1との相違点について説明する。この形態の静電容量型タッチパネル20は、実施の形態1の静電容量透明タッチシート1が透明基材6に貼着されている。なお、静電容量タッチシート1と透明基材6とは、基板2の第一電極3が形成された側の面と透明基材6が接着層8を介して貼着されている。
2…基板
3…第一電極
4…第二電極
5…絶縁部
6…透明基材
8…接着層
9…透明フィルム
10…ハードコート層
20…静電容量タッチパネル
100…上部基材
101…上部電極
110…下部基材
111…下部電極
200…静電容量型タッチシート
A…第一導電シート
B…第二導電シート
X…第一引き回し回路
Y…第二引き回し回路
α…下部導電シート
β…上部導電シート
γ…交点部分
δ…その他の部分
Claims (7)
- 基板と、
前記基板の上に独立して複数形成されその形状が帯状である第一電極と、
前記基板の前記第一電極が形成された面とは反対側の面に前記第一電極と交差するよう複数形成されその形状が帯状である第二電極と、
前記第二電極と連続的に形成され前記第二電極と同一の厚みを有する絶縁部とを備え、
前記第一電極が、透明金属酸化物からなり、
前記第二電極が、導通可能なようにそれぞれが接続された状態で存在している複数の導電性ナノワイヤと前記複数の導電性ナノワイヤを前記第二基板上に保持するためのバインダー樹脂とからなり、
前記絶縁部が、前記第二電極を構成する前記バインダー樹脂のみからなる静電容量型透明タッチシート。 - 前記第二電極の厚みは、前記第一電極の厚みより厚い請求項1記載の静電容量型透明タッチシート。
- 前記第二電極の幅は、前記絶縁部の幅より広い請求項1~2記載の静電容量型透明タッチシート。
- 前記透明金属酸化物は、ITOである請求項1~3記載の静電容量型透明タッチシート。
- 前記導電性ナノワイヤを構成する金属は、銀である請求項1~4記載の静電容量型透明タッチシート。
- 前記第二基板の前記第二電極が形成された面とは反対側の面にハードコート層が形成された請求項1~5記載の静電容量型透明タッチシート。
- 請求項1~6記載の静電容量タッチシートの基板の上に透明基材が貼着された静電容量透明タッチパネル。
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- 2013-05-29 TW TW102118927A patent/TWI571376B/zh active
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JP4862969B1 (ja) * | 2011-02-07 | 2012-01-25 | ソニー株式会社 | 透明導電性素子、入力装置、電子機器および透明導電性素子作製用原盤 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019009315A1 (ja) | 2017-07-05 | 2019-01-10 | 積水ポリマテック株式会社 | 静電容量式タッチパネル |
US10860157B2 (en) | 2017-07-05 | 2020-12-08 | Sekisui Polymatech Co., Ltd. | Capacitive touch panel |
Also Published As
Publication number | Publication date |
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KR101686892B1 (ko) | 2016-12-15 |
KR101691136B1 (ko) | 2016-12-29 |
US20150103503A1 (en) | 2015-04-16 |
WO2013180142A1 (ja) | 2013-12-05 |
JPWO2013180132A1 (ja) | 2016-01-21 |
US9448678B2 (en) | 2016-09-20 |
KR101561179B1 (ko) | 2015-10-15 |
KR20150020580A (ko) | 2015-02-26 |
KR20150020579A (ko) | 2015-02-26 |
KR20150004429A (ko) | 2015-01-12 |
JP5546696B2 (ja) | 2014-07-09 |
WO2013180132A1 (ja) | 2013-12-05 |
TWI571376B (zh) | 2017-02-21 |
CN104349883B (zh) | 2016-06-29 |
TW201404569A (zh) | 2014-02-01 |
US9256334B2 (en) | 2016-02-09 |
CN104349883A (zh) | 2015-02-11 |
US20150138139A1 (en) | 2015-05-21 |
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