Touch control substrate, method for fabricating the same, and touch control display device

Patent metadata

Field	Value
Publication number	US-11360610-B2
Application number	US-201716067919-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Jan 3, 2017
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A touch control substrate, a method for fabricating the same, and a touch control display device are provided. The touch control substrate includes a touch control region and a peripheral region surrounding the touch control region. Signal traces and a shielding wire are provided in the peripheral region, the shielding wire being configured to shield interference of the signal traces to the touch control region.

First claim

What is claimed is:

1. A touch control substrate, comprising a touch control region and a peripheral region surrounding the touch control region,
wherein signal traces and a shielding wire are provided in the peripheral region, the shielding wire surrounds all edges of the touch control region to shield interference of the signal traces to the touch control region,
wherein the touch control substrate further comprises:
a base substrate;
a conductive layer provided above the base substrate, the conductive layer being partially provided in the touch control region and the peripheral region so as to be electrically connected to touch control electrodes provided in the touch control region;
a first insulation layer located above the conductive layer, a first via being provided in the first insulation layer to expose the conductive layer provided below the first insulation layer; and
a metal pattern layer located above the first insulation layer, the metal pattern layer comprising the signal traces and the shielding wire,
wherein the signal traces are electrically connected to the conductive layer provided below the first insulation layer through the first via in the first insulation layer.

2. The touch control substrate of claim 1 , wherein at least a part of the shielding wire is provided between the signal traces and the touch control region.

3. The touch control substrate of claim 2 , further comprising:
a base substrate;
a conductive layer provided above the base substrate, the conductive layer being partially provided in the touch control region and the peripheral region so as to be electrically connected to touch control electrodes provided in the touch control region;
a first insulation layer located above the conductive layer, a first via being provided in the first insulation layer to expose the conductive layer provided below the first insulation layer; and
a metal pattern layer located above the first insulation layer, the metal pattern layer comprising the signal traces and the shielding wire,
wherein the signal traces are electrically connected to the conductive layer provided below the first insulation layer through the first via in the first insulation layer.

4. The touch control substrate of claim 2 , further comprising:
a base substrate;
a metal pattern layer provided above the base substrate, the metal pattern layer comprising the signal traces and the shielding wire;
a first insulation layer located above the metal pattern layer, a second via being provided in the first insulation layer to expose the signal traces provided below the first insulation layer; and
a conductive layer provided above the first insulation layer, the conductive layer being partially provided in the touch control region and the peripheral region so as to be electrically connected to touch control electrodes provided in the touch control region,
wherein the signal traces are electrically connected to the conductive layer provided above the first insulation layer through the second via in the first insulation layer.

5. The touch control substrate of claim 1 , further comprising:
a base substrate;
a metal pattern layer provided above the base substrate, the metal pattern layer comprising the signal traces and the shielding wire;
a first insulation layer located above the metal pattern layer, a second via being provided in the first insulation layer to expose the signal traces provided below the first insulation layer; and
a conductive layer provided above the first insulation layer, the conductive layer being partially provided in the touch control region and the peripheral region so as to be electrically connected to touch control electrodes provided in the touch control region,
wherein the signal traces are electrically connected to the conductive layer provided above the first insulation layer through the second via in the first insulation layer.

6. The touch control substrate of claim 1 , wherein,
a width of the shielding wire is larger than or equal to 300 μm and smaller than or equal to 500 μm.

7. The touch control substrate of claim 1 , wherein the shielding wire has an opening.

8. The touch control substrate of claim 7 , wherein no signal trace is provided at a side of the opening distal to the touch control region.

9. The touch control substrate of claim 1 , further comprising:
a grounding device located in a periphery of the signal traces, the grounding device being electrically connected to the shielding wire.

10. The touch control substrate of claim 9 , wherein at least one of the grounding device and the shielding wire has an opening.

11. The touch control substrate of claim 10 , wherein the grounding device has an opening, and no signal trace is provided at either side of the opening.

12. The touch control substrate of claim 1 , wherein a line-connection region for connecting to an external integrated circuit or an external flexible printed circuit board is provided in the peripheral region, a grounding terminal is provided in the line-connection region, and the shielding wire is electrically connected to the grounding terminal.

13. The touch control substrate of claim 1 , wherein the touch control substrate is a capacitive touch control substrate.

14. A touch control display device, comprising the touch control substrate of claim 1 .

15. The touch control substrate of claim 1 , wherein,
a width of the shielding wire is larger than or equal to 150 μm and smaller than 300 μm.

16. A method for fabricating a touch control substrate, the touch control substrate comprising a touch control region and a peripheral region surrounding the touch control region, the method comprising:
forming signal traces and a shielding wire in the peripheral region,
wherein at least a part of the shielding wire is provided between the signal traces and the touch control region, and the shielding wire surrounds all edges of the touch control region,
wherein the method further comprises:
forming a conductive layer above a base substrate with a black matrix having been formed thereon, the conductive layer is partially provided in the touch control region and the peripheral region so as to be electrically connected to touch control electrodes provided in the touch control region;
forming a first insulation layer above the conductive layer;
forming a first via in the first insulation layer to expose the conductive layer provided below the first insulation layer;
forming a metal layer above the first insulation layer, so that the metal layer fills the first via so as to be electrically connected to the conductive layer below the first insulation layer; and
patterning the metal layer to form the signal traces and the shielding wire,
wherein the signal traces are electrically connected to the conductive layer provided below the first insulation layer through the first via in the first insulation layer.

17. The method for fabricating a touch control substrate of claim 16 , further comprising:
forming a metal layer above a base substrate with a black matrix having been formed thereon;
patterning the metal layer to form the signal traces and the shielding wire;
forming a first insulation layer above the patterned metal layer;
forming a second via in the first insulation layer to expose the signal traces provided below the first insulation layer; and
forming a conductive layer above the first insulation layer, so that the conductive layer fills the second via so as to be electrically connected to the signal traces below the first insulation layer.

Assignees

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

Inventors

• Fan Wenjin
• Zhang Lei
• Kuo Tsungchieh
• Zhang Zhi
• He Xiaoyue

Classifications

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · 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

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title