Touch panel and manufacturing method therefor, and roll sheet of touch sensor

Patent metadata

Field	Value
Publication number	US-11029776-B2
Application number	US-201916579808-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	Sep 21, 2018
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A touch panel includes a substrate, a catalytic layer, peripheral traces, marks, first cover layers and second cover layers. The catalytic layer is formed on the peripheral area of the substrate, and the peripheral traces are formed on the catalytic layer. Each peripheral trace has a side wall and a top surface. The marks are formed on the catalytic layer, and each mark has a side wall and a top surface. The first cover layers cover the top surfaces of the peripheral traces, and the second cover layers cover the top surfaces of the marks. Each of the first cover layers and the second cover layers includes metal nanowires. The manufacturing method of the touch panel and a roll sheet of touch sensors are also disclosed.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate comprising a display area and a peripheral area;
a catalytic layer formed on the peripheral area;
a peripheral trace formed on the catalytic layer, wherein the peripheral trace has a side wall and a top surface;
a mark formed on the catalytic layer, wherein the mark has a side wall and a top surface;
a first cover layer and a second cover layer, wherein the first cover layer covers the top surface of the peripheral trace, the second cover layer covers the top surface of the mark, the first cover layer and the second cover layer at least comprise metal nanowires, and the peripheral trace, the mark, the first cover layer and the second cover layer are formed on the peripheral area of the substrate; and
a touch sensing electrode formed on the display area of the substrate, wherein the touch sensing electrode is electrically connected with the peripheral trace via the first cover layer, wherein the touch sensing electrode, the first cover layer and the second cover layer are made of same metal nanowire layer.

2. The touch panel of claim 1 , wherein the catalytic layer is an insulation layer comprising catalytic particles.

3. The touch panel of claim 2 , wherein the catalytic particles comprise nanoparticles.

4. The touch panel of claim 1 , further comprising a non-conductive area located on the display area and the peripheral area.

5. The touch panel of claim 4 , further comprising:
a film layer formed on the touch sensing electrode, the first cover layer, the second cover layer, and a portion of the catalytic layer in the non-conductive area on the peripheral area.

6. The touch panel of claim 1 , wherein the first cover layer has a side surface, and the side surface and the side wall of the peripheral trace are a coplanar surface formed by etching.

7. The touch panel of claim 1 , wherein the second cover layer has a side surface, and the side surface and the side wall of the mark are a coplanar surface formed by etching.

8. The touch panel of claim 1 , wherein the mark comprises a bonding alignment mark.

9. The touch panel of claim 1 , wherein a width of the peripheral trace ranges from 5 μm to 20 μm, and a distance between the peripheral trace and an adjacent peripheral trace ranges from 5 μm to 20 μm.

10. The touch panel of claim 1 , wherein the peripheral trace and the mark are made of metal material, and the touch sensing electrode at least comprises the metal nanowires.

11. The touch panel of claim 1 , wherein a resistance value between the peripheral trace and an adjacent peripheral trace is greater than 1×10 3 ohm.

12. A roll sheet of touch sensors, comprising:
a substrate, wherein the substrate is configured with a plurality of touch panels and a removing area, each of the touch panels comprises a display area, a peripheral area, a peripheral trace, a first cover layer and a touch sensing electrode, wherein a catalytic layer is formed on the peripheral area and the removing area, the peripheral trace is formed on the catalytic layer, the peripheral trace has a side wall and a top surface, the first cover layer covers the top surface of the peripheral trace, the peripheral trace and the first cover layer are formed on the peripheral area of each of the touch panels, the touch sensing electrode is formed on the display area of each of the touch panels, and the touch sensing electrode is electrically connected with the peripheral traces via the first cover layer;
a mark formed on the catalytic layer, wherein the mark has a side wall and a top surface; and
a second cover layer formed on the top surface of the mark, wherein the first cover layer comprises metal nanowires and the second cover layer comprises metal nanowires, wherein the touch sensing electrode, the first cover layer and the second cover layer are made of same metal nanowire layer.

13. The roll sheet of claim 12 , wherein the catalytic layer is an insulation layer comprising catalytic particles.

14. The roll sheet of claim 13 , wherein the catalytic particles comprise nanoparticles.

15. The roll sheet of claim 12 , wherein each of the touch panels further comprises a non-conductive area located on the display area and the peripheral area.

16. The roll sheet of claim 15 , wherein each of the touch panels further comprises:
a film layer covering the touch sensing electrode, the catalytic layer, the first cover layers and the second cover layers.

17. The roll sheet of claim 12 , wherein the first cover layer has a side surface, and the side surface and the side wall of the peripheral trace are a coplanar surface formed by etching.

18. The roll sheet of claim 12 , wherein the second cover layer has a side surface, and the side surface and the side wall of the mark are a coplanar surface formed by etching.

19. The roll sheet of claim 12 , wherein the mark comprises a bonding alignment mark disposed in the peripheral area of each of the touch panels, or the mark comprises a cutting alignment mark, an alignment mark, a direction-indication mark, a scale mark or a digital/letter mark formed on the removing area.

20. The roll sheet of claim 12 , wherein a width of the peripheral trace ranges from 5 μm to 20 μm, and a distance between the peripheral trace and an adjacent peripheral trace ranges from 5 μm to 20 μm.

21. The roll sheet of claim 12 , wherein the peripheral trace and the mark are made of metal material, and the touch sensing electrode at least comprises metal nanowires.

22. The roll sheet of claim 12 , wherein a resistance value between the peripheral trace and an adjacent peripheral trace is greater than 1×10 3 ohm.

23. A manufacturing method of a touch panel, comprising:
providing a substrate, wherein the substrate comprises a display area and a peripheral area;
forming a catalytic layer on the peripheral area;
forming a metal layer on the catalytic layer;
forming a metal nanowire layer on the display area and the peripheral area; and
performing a patterning step for patterning the metal layer to form a peripheral trace and a mark, wherein the peripheral trace and the mark are formed on the catalytic layer, the peripheral trace has a side wall and a top surface, and the mark has a side wall and a top surface;
wherein the patterning step patterns the metal nanowire layer to form a touch sensing electrode within the display area, a first cover layer and a second cover layer within the peripheral area, wherein the first cover layer covers the top surface of the peripheral trace, and the second cover layer covers the top surface of the mark.

24. The manufacturing method of claim 23 , wherein the patterning step further patterns the metal nanowire layer to form a touch sensing electrode, the touch sensing electrode is formed on the display area of the substrate, and the touch sensing electrode is electrically connected to the peripheral trace.

25. The manufacturing method of claim 24 , wherein the catalytic layer is printed on the peripheral area.

26. The manufacturing method of claim 23 , wherein the catalytic layer is formed by printing an insulation material comprising catalytic particles on the peripheral area.

27. The manufacturing method of claim 26 , wherein the catalytic particles comprises nanoparticles.

28. The manufacturing method of claim 23 , wherein the metal layer is formed on the catalytic layer by c

Assignees

• Tpk Touch Solutions Inc
• Tpk Glass Solutions Xiamen Inc

Inventors

• Fang Wei-Chia
• Wu Ho-Chien
• Chu Chun-Hung
• Hsiao Chung-Chin

Classifications

• 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

• G06F3/04164 Primary

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · 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