Conductive film

• US 9,304,635 B2
• Filed: 07/17/2013
• Issued: 04/05/2016
• Est. Priority Date: 08/09/2012
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Fujino, Nozomi, Takao, Hiroyuki
• Primary Examiner(s): KHAN, TAHSEEN
• Application Number:
  US13/944,428
• Publication Number:
  US 20140044942A1
• Time in Patent Office: 993 Days
• Field of Search: 428/214, 428/215, 428/332
• US Class Current: 1/1
• CPC Class Codes: B32B 15/04 comprising metal 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 bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2457/00 Electrical equipment
• 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 27/325 comprising polycycloolefins
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B32B 9/00 Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
• CPC Class Codes: C22C 14/00 Alloys based on titanium
• CPC Class Codes: C22C 32/001 with only oxides
• CPC Class Codes: C22C 9/00 Alloys based on copper
• CPC Class Codes: C23C 14/086 of zinc, germanium, cadmium, indium, tin, thallium or bismuth
• CPC Class Codes: C23C 14/562 for coating elongated substrates
• CPC Class Codes: Y10T 428/24959 of adhesive layers
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension

Abstract

A conductive film includes an elongated film base, a first conductive layer, a second conductive layer and a third conductive layer in this order. The elongated film base has a longitudinal direction and a width direction orthogonal to the longitudinal direction. The width direction dimension of the elongated film base is greater than or equal to 1 m. The first conductive layer is an indium-based oxide layer. The second conductive layer is a metal layer. The third conductive layer is an oxidized metal layer having a thickness of 1 nm to 15 nm formed by sputter deposition.

Claims

1. A conductive film comprising:

an elongated film base, a first conductive layer, a second conductive layer and a third conductive layer in this order,

the elongated film base having a longitudinal direction and a width direction orthogonal to the longitudinal direction,

the width direction dimension of the elongated film base is greater than or equal to 1 m,

the first conductive layer being an indium-based oxide layer,

the second conductive layer being a metal layer,

the third conductive layer being an oxidized metal layer having a thickness of 1 nm to 15nm formed by sputter deposition,

wherein a surface resistance value is 0.1Ω

/□

to 0.6Ω

/□

, and

a standard deviation of a surface resistance value in the with direction is less than or equal to 0.01Ω

/□

.

2. The conductive film according to claim 1, wherein the width direction dimension of the elongated film base is 1m to 3m.

3. The conductive film according to claim 1, wherein a surface resistance value is 0.3Ω

/□

to 0.6Ω

/□

.

4. The conductive film according to claim 1, wherein the standard deviation of a surface resistance value in the width direction is 0.001 to 0.005Ω

/□

.

5. The conductive film according to claim 1, wherein the third conductive layer is made of one of a copper oxide, a silver oxide, a silver oxide alloy and a titanium oxide alloy.

6. The conductive film according to claim 1, wherein the second conductive layer is made of one of copper, silver, a silver alloy and a titanium alloy.

7. The conductive film according to claim 6, wherein the second conductive layer has a thickness of 20 nm to 700 nm.

8. The conductive film according to claim 1, wherein the first conductive layer is made of one of an indium tin oxide, an indium zinc oxide and a composite of indium oxide and zinc oxide.

9. The conductive film according to claim 8, wherein the first conductive layer has a thickness of 20 nm to 80 nm.

10. The conductive film according to claim 1, wherein the elongated film base has a thickness of 80 μ

m to 200 μ

m.

11. The conductive film according to claim 10, wherein the elongated film base is made of polycycloolefin.