Conductive sheet

Patent metadata

Field	Value
Publication number	US-10067527-B2
Application number	US-201314429296-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Sep 18, 2012
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A conductive sheet has a structure in which a conductive adhesive layer laminated on one side of a base substrate and a light-shielding insulating layer laminated on another side of the base substrate. The base substrate has a structure in which the same kind of metal layers are formed on respective sides of a resin film. The light-shielding insulating layer of the conductive sheet has a surface having a surface resistivity of 1.0×10 8 Ω/square or more, a gloss value of 80% or less, and an optical density of 1 or more.

First claim

The invention claimed is:

1. A conductive sheet comprising a base substrate, a conductive adhesive layer laminated on one side of the base substrate and a light-shielding insulating layer laminated on another side of the base substrate, wherein
the base substrate has a structure in which the same kind of metal layers are formed on respective sides of a resin film, where the structure of the base substrate is formed by laminating metal foils on the respective sides of the resin film via an adhesive layer,
the light-shielding insulating layer of the conductive sheet has a surface having a surface resistivity of 1.0×10 8 Ω/square or more, and the conductive adhesive layer of the conductive sheet has a surface having a surface resistivity of 500 mΩ/square or less, and
the conductive sheet exhibits a curl characteristic in that when the conductive sheet further comprises a release sheet on a side of the conductive adhesive layer, and when the conductive sheet is cut into a sample strip with a width of 15 mm and a length of 150 mm, peeling the release sheet from the sample strip in a direction of 180° results in a curl of the sample strip of less than one rotation.

2. The conductive sheet according to claim 1 , wherein the light-shielding insulating layer of the conductive sheet has a gloss value of 80% or less, and an optical density of 1 or more.

3. The conductive sheet according to claim 1 , wherein the light-shielding insulating layer of the conductive sheet has a surface having a surface resistivity of 1.0×10 10 Ω/square or more, a gloss value of 40% or less, and an optical density of 1.2 or more.

4. The conductive sheet according to claim 1 , wherein the resin film constituting the base substrate has a linear expansion coefficient of 15 to 100 ppm/° C. and the metal layer has a linear expansion coefficient of 12 to 25 ppm/° C.

5. The conductive sheet according to claim 4 , wherein a difference between the linear expansion coefficient of the resin film and the linear expansion coefficient of the metal layers constituting the base substrate is 40 ppm/° C. or less.

6. The conductive sheet according to claim 1 , wherein the resin film constituting the base substrate has a modulus of elongation (in accordance with JIS K7113) is 0.3 to 15 GPa, and the metal layer has a modulus of elongation of 45 to 200 GPa.

7. The conductive sheet according to claim 6 , wherein a difference between the modulus of elongation (in accordance with JIS K7113) of the resin film and the modulus of elongation of the metal layers constituting the base substrate is 100 GPa or less.

8. The conductive sheet according to claim 1 , wherein the resin film, the metal layer on a side of the conductive adhesive layer, and the metal layer on a side of the light-shielding insulating layer, which constitute the base substrate, are each 5 to 20 μm in a vertical thickness of the resin film.

9. The conductive sheet according to claim 8 , wherein a ratio [Mt 1 ]:[Bt]:[Mt 2 ] of a thickness [Mt 1 ] of the metal layer on the side of the conductive adhesive layer, a thickness [Bt] of the resin film, and a thickness [Mt 2 ] of the metal layer on the side of the light-shielding insulating layer is one having values in the range of 0.25 to 4:1:0.25 to 4 in a vertical thickness of the resin film.

10. The conductive sheet according to claim 1 , wherein the light-shielding insulating layer is a black resin layer that is formed from an insulating resin colored by a black colorant.

11. The conductive sheet according to claim 10 , wherein the black colorant is aniline black.

12. The conductive sheet according to claim 1 , wherein the light-shielding insulating layer comprises a black resin layer that is formed from an insulating resin colored by a black colorant, and an insulating primer layer or a mat varnish layer formed on at least one side thereof.

13. The conductive sheet according to claim 12 , wherein the black colorant is carbon black.

14. An image display in which a portion to be electrically connected is disposed in a rough plane and is connected by the conductive sheet according to claim 1 .

15. An image display in which portions to be electrically connected are disposed on respective different planes and are connected by the conductive sheet according to claim 1 .

16. An image display comprising: a display operation panel in which a top electrode provided on an outer edge of a surface of the display operation panel and a back electrode provided on an outer edge of a back face are connected via the conductive sheet according to claim 1 that is disposed so as to surround the outer edge of the display operation panel; and an image display panel that is operated by the display operation panel.

17. An image display in which the conductive sheet according to claim 1 is bonded to the image display so as to surround an outer edge of at least one constituent member thereof.

18. A conductive sheet comprising a base substrate, a conductive adhesive layer laminated on one side of the base substrate and a light-shielding insulating layer laminated on another side of the base substrate, wherein
the base substrate has a structure in which the same kind of metal layers are formed on respective sides of a resin film, where the structure of the base substrate is formed by laminating metal foils on the respective sides of the resin film via an adhesive layer,
the light-shielding insulating layer of the conductive sheet has a surface having a surface resistivity of 1.0×10 8 Ω/square or more, and the conductive adhesive layer of the conductive sheet has a surface having a surface resistivity of 500 mΩ/square or less, and
the conductive sheet exhibits a shape retentivity property in that when the conductive sheet further comprises a release sheet on a side of the conductive adhesive layer, and when the conductive sheet is cut into a sample strip with a width of 15 mm and a length of 50 mm and bent at 90° at a center of the sample strip on a side of the light-shielding insulating layer to form a shaped sample, the shaped sample retains its shape for at least 10 seconds after the release sheet is peeled from the sample strip in a direction of 180°.

19. An image display in which a portion to be electrically connected is disposed in a rough plane and is connected by the conductive sheet according to claim 18 .

20. An image display in which portions to be electrically connected are disposed on respective different planes and are connected by the conductive sheet according to claim 18 .

21. An image display comprising: a display operation panel in which a top electrode provided on an outer edge of a surface of the display operation panel and a back electrode provided on an outer edge of a back face are connected via the conductive sheet according to claim 18 that is disposed so as to surround the outer edge of the display operation panel; and an image display panel that is operated by the display operation panel.

22. An image display in which the conductive sheet according to claim 18 is bonded to the image display so as to surround an outer edge of at least one constituent member thereof.

23. A conductive sheet comprising a base substrate, a conductive adhesive layer laminated on one side of the base substrate and a light-shielding insulating layer laminated on another side of the base substrate, wherein
the base substrate has a structure in which the same kind of metal layers are formed on respective sides of a resin film, where the

Assignees

• Dexerials Corp

Inventors

• Kuroda Daisuke

Classifications

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• B32B2307/212

  Electromagnetic interference shielding · CPC title

• B32B27/288

  comprising polyketones · CPC title

• B32B15/06 Primary

  of {natural rubber or synthetic} rubber · CPC title

• B32B27/36

  comprising polyesters · CPC title