Touch panel with flexible touch sensor and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9626057-B2
Application number	US-201514825152-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 16, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A touch panel comprises a flexible touch sensor and a cover plate. The cover plate and the flexible touch sensor are attached to each other by an adhesive layer. The flexible touch sensor at least comprises a sensing electrode structure disposed on a flexible substrate. The sensing electrode structure comprises a first insulating layer and a first patterned conductive layer formed on the first insulating layer. The first insulating layer is disposed between the flexible substrate and the first patterned conductive layer and directly contacts the flexible substrate.

First claim

What is claimed is:

1. A flexible touch sensor, comprising:
a sensing electrode structure disposed on a flexible substrate and comprising:
a first insulating layer;
a first patterned conductive layer disposed on the first insulating layer, wherein:
the first insulating layer is disposed between the flexible substrate and the first patterned conductive layer, and
the first insulating layer directly contacts the flexible substrate;

a first wire layer disposed on the first insulating layer, wherein the first wire layer is electrically connected with the first patterned conductive layer;
a joint where the first wire layer directly contacts the first patterned conductive layer;
a second insulating layer disposed on the first patterned conductive layer, wherein the second insulating layer overlies a portion of the first patterned conductive layer but avoids the joint;
a second patterned conductive layer formed on the second insulating layer;
a second wire layer electrically connected with the second patterned conductive layer, wherein the second wire layer is disposed on the second insulating layer and on a same surface of the second insulating layer as the second patterned conductive layer; and
a protection layer disposed over the second patterned conductive layer and in contact with the first insulating layer, wherein:
the protection layer directly contacts the joint,
the protection layer directly or indirectly contacts a to surface and a sidewall of the first wire layer, and
the protection layer directly contacts a to surface and a sidewall of the second insulating layer.

2. The flexible touch sensor as recited in claim 1 , wherein the protection layer directly contacts the top surface and the sidewall of the first wire layer.

3. The flexible touch sensor as recited in claim 1 , wherein the flexible substrate is between 0.1 μm and 15 μm thick.

4. The flexible touch sensor as recited in claim 1 , wherein the first insulating layer has a hot pressing adhesion property.

5. The flexible touch sensor as recited in claim 1 , wherein the first patterned conductive layer is formed by a conductive plasma containing conductive polymer material or nano metal material.

6. A touch panel, comprising:
a flexible touch sensor, comprising:
a sensing electrode structure disposed on a flexible substrate and comprising:
a first insulating layer;
a first patterned conductive layer disposed on the first insulating layer, wherein:
the first insulating layer is disposed between the flexible substrate and the first patterned conductive layer, and
the first insulating layer directly contacts the flexible substrate;

a first wire layer disposed on the first insulating layer, wherein the first wire layer is electrically connected with the first patterned conductive layer;
a joint where the first wire layer directly contacts the first patterned conductive layer;
a second patterned conductive layer disposed over the first patterned conductive layer;
a second insulating layer disposed between the first patterned conductive layer and the second patterned conductive layer, wherein the second insulating layer overlies a portion of the first patterned conductive layer but avoids the joint; and
a protection layer in direct contact with a top surface and a sidewall of the second patterned conductive layer, the first insulating layer, and the joint, wherein the protection layer further directly or indirectly contacts a to surface and a sidewall of the first wire layer; and

a cover plate, wherein the cover plate and the flexible touch sensor are attached to each other by an adhesive layer.

7. The touch panel as recited in claim 6 , wherein:
a blocking layer is formed on the cover plate, and
the blocking layer overlies the first wire layer and second wire layer of the flexible touch sensor.

8. The touch panel as recited in claim 6 , wherein the protection layer directly contacts the top surface and the sidewall of the first wire layer.

9. The touch panel as recited in claim 6 , wherein
the protection layer is in direct contact with the second insulating layer.

10. The touch panel as recited in claim 9 , wherein the protection layer directly contacts a top surface and a sidewall of the second insulating layer.

Assignees

• Tpk Touch Solutions Xiamen Inc

Inventors

• Chi Ho-Hsun
• Jiang Yau-Chen
• Lai Bin
• Xie Yanjun

Classifications

• G06F2203/04103

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

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title