Transparent conductive laminates and touch panels having transparent conductive laminates

• US 9,983,708 B2
• Filed: 09/16/2016
• Issued: 05/29/2018
• Est. Priority Date: 03/25/2014
• Status: Expired due to Fees

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Iwata, Reiko, Ito, Yutaka
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US15/267,783
• Publication Number:
  US 20170003774A1
• Time in Patent Office: 620 Days
• CPC Class Codes: B32B 15/02 Layer formed of wires, e.g. mesh
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/082 comprising vinyl resins; comprising acrylic resins
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2255/02 on fibrous or filamentary layer
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2260/021 Fibrous or filamentary layer
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2307/206 Insulating
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/10 characterised by a discontinuous layer, i.e. formed of separate pieces of material
• CPC Class Codes: B32B 5/02 characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: B32B 5/028 Net structure, e.g. spaced apart filaments bonded at the crossing points
• CPC Class Codes: B32B 5/142 : Variation across the area of the layer
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: G06F 2203/04111 : 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
• CPC Class Codes: G06F 3/041 : Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0445 : using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: Y10S 977/762 : Nanowire or quantum wire, i.e. axially elongated structure having two dimensions of 100 nm or less

Abstract

A transparent conductive laminate which does not cause erroneous operation under high temperature and high humidity and a touch panel which includes the transparent conductive laminate are provided. The transparent conductive laminate includes a transparent base material; and a transparent electrode layer containing resin which is disposed on one or both sides of the transparent base material, wherein the transparent electrode layer includes a plurality of conductive regions which contain fibrous metals, and a non-conductive region, and the transparent electrode layer has a thickness of 30 nm or more and 150 nm or less.

Claims

1. A touch panel comprising:

a transparent conductive laminate comprising;

a transparent base material; and

a transparent electrode layer which contains a resin and is disposed on one or both sides of the transparent base material, wherein

the transparent electrode layer includes a plurality of conductive regions which contain fibrous metals, and a non-conductive region, and

the transparent electrode layer has a thickness of 30 nm or more and 150 nm or less;

a metal wiring connected to the conductive region;

a drive electrode and a sense electrode made up of the respective conductive regions and disposed in layers different from each other;

a ground electrode disposed in the same layer as either the drive electrode or the sense electrode outside a sensor area in which the either the drive electrode or the sense electrode is disposed; and

an auxiliary electrode disposed between the ground electrode and an electrode closest to the ground electrode out of the drive electrode or the sense electrode disposed in the same layer as the ground electrode, the auxiliary electrode being made of an electrically conductive material and being constantly at an equal potential to the electrode closest to the ground electrode;

wherein an electrical resistance between the conductive regions with the non-conductive region interposed therebetween is 10⁹ Ω

or more after elapse of 240 hours under an atmosphere of temperature of 60°

C. and humidity of 90%.

2. The touch panel of claim 1, wherein the auxiliary electrode is disposed outside an outermost area of the conductive region which forms the drive electrode or the sense electrode disposed in a layer different from the auxiliary electrode.

3. The touch panel of claim 1, wherein the auxiliary electrode is disposed outside a touch sensor effective area which is an area of an overlapped area of the sensor area in the same layer as the auxiliary electrode and the sensor area in a layer different from the auxiliary electrode added with half of an arrangement pitch of the drive electrode or the sense electrode.

4. The touch panel of claim 1, wherein the auxiliary electrode is disposed outside a sensor area in which the drive electrode or the sense electrode in a layer different from the auxiliary electrode and extends to intersect with the metal wiring connected to the drive electrode or the sense electrode in a layer different from the auxiliary electrode.

5. The touch panel of claim 1, wherein a width of the drive electrode, the sense electrode or the metal wiring disposed in a layer different from the auxiliary electrode at a position overlapping the auxiliary electrode is smaller than 500 μ

m.

6. The touch panel of claim 1, wherein a width of the auxiliary electrode is smaller than 1 mm.

7. The touch panel of claim 1, wherein the auxiliary electrode includes at least a metal nanowire.

8. The touch panel of claim 7, wherein the metal nanowire is covered with a resin layer.

9. The touch panel of claim 1, wherein the auxiliary electrode includes a metal electrode.

10. The touch panel of claim 1, wherein the drive electrode and/or the sense electrode has an end which is covered with a metal material, the end being not connected to the metal wiring.