Flexible touch screen, manufacturing method thereof and display device

Patent metadata

Field	Value
Publication number	US-11144142-B2
Application number	US-201916390216-A
Country	US
Kind code	B2
Filing date	Apr 22, 2019
Priority date	Jul 20, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A flexible touch screen, a manufacturing method thereof and a display device are provided. The manufacturing method includes: attaching a first protecting layer to a surface of a flexible substrate; attaching a surface of the flexible substrate away from the first protecting layer to a base substrate; removing the first protecting layer; forming a touch electrode layer on a side of the flexible substrate away from the base substrate; attaching a second protecting layer to the surface of the touch electrode layer; separating the flexible substrate from the base substrate; and removing the second protecting layer.

First claim

The invention claimed is:

1. A manufacturing method of a flexible touch screen, comprising:
attaching a first protecting layer to a surface of a flexible substrate;
attaching a surface of the flexible substrate away from the first protecting layer to a base substrate;
removing the first protecting layer;
forming a touch electrode layer on a side of the flexible substrate away from the base substrate;
attaching a second protecting layer to a surface of the touch electrode layer;
separating the flexible substrate from the base substrate; and
removing the second protecting layer.

2. The manufacturing method according to claim 1 , wherein a difference between a coefficient of thermal expansion of the first protecting layer and a coefficient of thermal expansion of the flexible substrate is smaller than 0.05%; and
a difference between a coefficient of thermal expansion of the second protecting layer and the coefficient of thermal expansion of the flexible substrate is smaller than 0.05%.

3. The manufacturing method according to claim 1 , wherein a material of the first protecting layer is phenolic resin, polyethylene terephthalate or cyclo olefin polymer; and
a material of the second protecting layer is phenolic resin, polyethylene terephthalate or cyclo olefin polymer.

4. The manufacturing method according to claim 1 , wherein attaching the surface of the flexible substrate away from the first protecting layer to the base substrate comprises:
forming a temperature-controlled bonding layer on the base substrate; and
attaching the flexible substrate to the base substrate through the temperature-controlled bonding layer.

5. The manufacturing method according to claim 1 , wherein forming the touch electrode layer on the side of the flexible substrate away from the base substrate comprises:
forming a plurality of first touch electrodes and a plurality of second touch electrodes on the side of the flexible substrate away from the base substrate, wherein the first touch electrodes and the second touch electrodes are intersected with each other, each of the first touch electrodes is of a strip-shaped structure, and each of the second touch electrodes comprises a plurality of sub-electrodes;
forming a plurality of signal lines, wherein the signal lines are connected with the first touch electrodes or the second touch electrodes;
forming an insulating layer on a layer where the signal lines are located; and
forming a plurality of bridging lines on the insulating layer, wherein the bridging lines are configured to connect the sub-electrodes in the second touch electrodes.

6. The manufacturing method according to claim 3 , wherein the material of the first protecting layer is the same as the material of the second protecting layer.

7. The manufacturing method according to claim 6 , wherein the material of the first protecting layer and the material of the second protecting layer are the same as a material of the flexible substrate.

8. The manufacturing method according to claim 4 , wherein a material of the temperature-controlled bonding layer is an optically clear adhesive material.

Assignees

• Hefei Xinsheng Optoelectronics Tech Group Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Zeng Ting
• Li Yuan
• Chen Qicheng
• Li Yangjie
• Yin Liuyue
• Wang Binghong

Classifications

• H10D86/0214

  using temporary substrates · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title