Touch panel and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2020371640-A1
Application number	US-202016879949-A
Country	US
Kind code	A1
Filing date	May 21, 2020
Priority date	May 22, 2019
Publication date	Nov 26, 2020
Grant date	—

Abstract

A method of manufacturing a touch panel including providing a substrate having a display area and a peripheral area is provided. A metal layer and a metal nanowire layer are disposed, wherein a first portion of the metal nanowire layer is disposed in the display area, and a second portion of the metal nanowire layer and the metal layer are disposed in the peripheral area. A patterned layer with a pattern is disposed. A patterning step is performed according to the patterned layer, wherein the patterning step includes forming the metal layer into multiple peripheral wires and simultaneously forming the second portion of the metal nanowire layer into multiple etching layers by using an etching solution configured to etch the metal layer and the metal nanowire layer. A touch panel is further provided.

First claim

What is claimed is:

1 . A manufacturing method of a touch panel, comprising:
providing a substrate having a display area and a peripheral area; disposing a metal layer and a metal nanowire layer, wherein:
a first portion of the metal nanowire layer is disposed in the display area, and
a second portion of the metal nanowire layer and the metal layer are disposed in the peripheral area;
disposing a patterned layer having a pattern; and performing a patterning step according to the patterned layer, wherein the patterning step comprises forming the metal layer into multiple peripheral wires and simultaneously forming the second portion of the metal nanowire layer into multiple etching layers by using an etching solution configured to etch the metal layer and the metal nanowire layer.

2 . The manufacturing method of the touch panel of claim 1 , wherein:
the patterning step further comprises forming the first portion of the metal nanowire layer into a touch sensing electrode by using the etching solution, the touch sensing electrode is disposed in the display area, and the touch sensing electrode is electrically connected to the multiple peripheral wires.

3 . The manufacturing method of the touch panel of claim 1 , wherein disposing the patterned layer with the pattern comprises forming the patterned layer by flexographic printing, letterpress printing, gravure printing, or screen printing.

4 . The manufacturing method of the touch panel of claim 1 , wherein disposing the metal layer and the metal nanowire layer comprises:
disposing the metal layer in the peripheral area; and subsequently disposing the metal nanowire layer in the display area and the peripheral area such that the first portion of the metal nanowire layer disposed in the display area is formed on the substrate and the second portion of the metal nanowire layer disposed in the peripheral area is formed on the metal layer.

5 . The manufacturing method of the touch panel of claim 4 , wherein disposing the metal layer in the peripheral area comprises selectively forming the metal layer in the peripheral area without being formed in the display area.

6 . The manufacturing method of the touch panel of claim 4 , wherein disposing the metal layer in the peripheral area comprises:
forming the metal layer in the peripheral area and the display area; and removing the metal layer disposed in the display area.

7 . The manufacturing method of the touch panel of claim 4 , wherein disposing the patterned layer with the pattern comprises disposing the patterned layer on the metal nanowire layer such that a composite structure is formed by the patterned layer and the metal nanowire layer.

8 . The manufacturing method of the touch panel of claim 4 , wherein:
the patterning step further comprises forming the metal layer into multiple marks by using the etching solution, the multiple etching layers comprise multiple first coverings and multiple second coverings, each of the multiple first coverings is disposed on a corresponding peripheral wire of the multiple peripheral wires, and each of the multiple second coverings is disposed on a corresponding mark of the multiple marks.

9 . The manufacturing method of the touch panel of claim 1 , wherein disposing the metal layer and the metal nanowire layer comprises:
disposing the metal nanowire layer in the display area and the peripheral area; and subsequently disposing the metal layer in the peripheral area, wherein the metal layer is on the second portion of the metal nanowire layer.

10 . The manufacturing method of the touch panel of claim 9 , wherein:
the patterning step further comprises forming the metal layer into multiple marks by using the etching solution, the multiple etching layers comprise multiple first interlayers and multiple second interlayers, each of the multiple first interlayers is disposed between a corresponding peripheral wire of the multiple peripheral wires and the substrate, and each of the multiple second interlayers is disposed between a corresponding mark of the multiple marks and the substrate.

11 . The manufacturing method of the touch panel of claim 10 , further comprising removing the patterned layer after the patterning step.

12 . The manufacturing method of the touch panel of claim 1 , further comprising disposing a film layer.

13 . The manufacturing method of the touch panel of claim 1 , wherein the manufacturing method is performed on one side or on two opposite sides of the substrate.

14 . A touch panel, comprising:
a substrate having a display area and a peripheral area; multiple peripheral wires disposed in the peripheral area; multiple first coverings covering the multiple peripheral wires; a touch sensing electrode disposed in the display area, wherein:
the touch sensing electrode is electrically connected to the multiple peripheral wires, and
the multiple first coverings and the touch sensing electrode comprise metal nanowires; and
a patterned layer disposed on the multiple first coverings and the touch sensing electrode, wherein the patterned layer has printing sides.

15 . The touch panel of claim 14 , wherein:
a first composite structure is defined by the patterned layer and the multiple first coverings, or a second composite structure is defined by the patterned layer and the touch sensing electrode.

16 . The touch panel of claim 14 , wherein:
the multiple first coverings have sides, the sides of the multiple first coverings and sides of the multiple peripheral wires define common etching surfaces, and the common etching surfaces and the printing sides are aligned with each other.

17 . The touch panel of claim 14 , further comprising:
multiple marks disposed in the peripheral area; and multiple second coverings covering the multiple marks, wherein the multiple second coverings comprise metal nanowires.

18 . The touch panel of claim 17 , wherein:
the multiple second coverings have sides, the sides of the multiple second coverings and sides of the multiple marks define common etching surfaces, and the common etching surfaces and the printing sides are aligned with each other.

19 . The touch panel of claim 14 , further comprising a film layer.

20 . The touch panel of claim 17 , wherein the multiple peripheral wires and the multiple marks are made of metal materials.

Assignees

• Cambrios Film Solutions Corp

Inventors

• Tsai Yi-Chen
• Fang Wei-Chia
• Chu Chun-Hung
• Hsiao Chung-Chin

Classifications

• C23F1/18

  for etching copper or alloys thereof · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F2203/04103

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

• G06F3/04164

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