Graphene conductive film and method for forming the same, and flexible touch device

Patent metadata

Field	Value
Publication number	US-2016368250-A1
Application number	US-201514909630-A
Country	US
Kind code	A1
Filing date	Jul 31, 2015
Priority date	Feb 3, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

The present disclosure provides a graphene conductive film, a method for forming the same and a flexible touch device. The method for forming a graphene conductive film includes: growing a graphene layer on a metal catalytic substrate; coating a PAA solution onto the graphene layer, and curing the PAA solution so as to form a PI film; and removing the metal catalytic substrate so as to form the graphene conductive film with the PI film.

First claim

1 . A method for forming a graphene conductive film, comprising:
growing a graphene layer on a metal catalytic substrate; coating a polyamide acid (PAA) solution onto the graphene layer, and curing the PAA solution so as to form a polyimide (PI) film; and removing the metal catalytic substrate so as to form the graphene conductive film with the PI film.

2 . The method according to claim 1 , wherein, prior to removing the metal catalytic substrate, the method further comprises coating a protective solution onto a surface of the PI film and curing the protective solution so as to form an optical protective layer.

3 . The method according to claim 2 , wherein a refractive index of the optical protective layer is smaller than or equal to a refractive index of the PI film.

4 . The method according to claim 1 , wherein the PAA solution is a high-temperature-resistant PAA solution or a transparent PAA solution.

5 . The method according to claim 1 , wherein the PAA solution is cured by being heated or being subjected to a chemical reaction.

6 . The method according to claim 1 , wherein a thickness of the PI film is larger than 10 microns and smaller than 30 microns.

7 . The method according to claim 1 , wherein a thickness of the graphene layer is smaller than 1 nanometer.

8 . The method according to claim 1 , wherein a thickness of the graphene conductive film is larger than 10 microns and smaller than 30 microns.

9 . The method according to claim 2 , wherein a thickness of the graphene conductive film is larger than 10 microns and smaller than 30 microns.

10 . The method according to claim 1 , wherein the graphene layer is grown on the metal catalytic substrate by chemical vapor deposition.

11 . A graphene conductive film formed by the method according to claim 1 , comprising a graphene layer and a polyimide (PI) film arranged on the graphene layer.

12 . The graphene conductive film according to claim 11 , wherein a thickness of the graphene layer is smaller than 1 nanometer.

13 . The graphene conductive film according to claim 11 , wherein a thickness of the PI film is larger than 10 microns and smaller than 30 microns.

14 . The graphene conductive film according to claim 11 , wherein a thickness of the graphene conductive film is larger than 10 microns and smaller than 30 microns.

15 . The graphene conductive film according to claim 11 , further comprising an optical protective layer arranged on the PI film.

16 . The graphene conductive film according to claim 15 , wherein a refractive index of the optical protective layer is smaller than or equal to a refractive index of the PI film.

17 . The graphene conductive film according to claim 15 , wherein a thickness of the graphene conductive film is larger than 10 microns and smaller than 30 microns.

18 . A flexible touch device, comprising the graphene conductive film according to claim 11 .

19 . The method according to claim 2 , wherein the PAA solution is a high-temperature-resistant PAA solution or a transparent PAA solution.

20 . The method according to claim 2 , wherein a thickness of the graphene layer is smaller than 1 nanometer.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Di Yunping

Classifications

• C01B2204/22

  Electronic properties · CPC title

• C23C16/26

  Deposition of carbon only · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• C09D179/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• B32B2307/202

  Conductive · CPC title