# US 2019/0317631 A1 · Metal mesh touch display structure and manufacturing method thereof

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- Number: US 2019/0317631 A1
- Document ID: US20190317631A1
- Status: Published application
- Kind: A1
- Application number: 16/300,921
- Filed: 2018-09-18
- Published: 2019-10-17
- Earliest claimed: 2018-04-12
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Xiaoliang Feng; Jeongwoo Lee
- Web page: https://patentgrep.com/patent/US20190317631A1

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/044: by capacitive means
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 3/047: using sets of wires, e.g. crossed wires
- G02F 1/13338: {Input devices, e.g. touch panels}
- G06F 2203/04102: 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
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- H10K 59/40: OLEDs integrated with touch screens
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The invention provides a metal mesh touch display structure. The metal mesh touch display structure includes: a display device and a metal mesh structure; the metal mesh structure includes a bridge point, a first protective layer, first and second metal wires, and a second protection layer; the first and second metal wires are mutually insulated, the first metal wire forms a grid pattern corresponding to the shape of the first direction electrode of mutual capacitance, the second metal wire forms a grid pattern corresponding to the shape of the second direction electrode of mutual capacitance The first protective layer is provided with a via corresponding to the bridge point, and the second metal wire is connected to the bridge point through the via; the grid of the grid pattern is formed on light-shielding layer between the pixels of the display device. The invention also provides a corresponding manufacturing method.

## Claims

### Claim 1

A metal mesh touch display structure, comprising: a display device and a metal mesh structure disposed on the display device; the metal mesh structure comprising a bridge point disposed on the display device, a first protective layer disposed on the bridge point, a first metal wire disposed on the first protective layer for forming a first direction electrode of mutual capacitance and a second metal wire for forming a second direction electrode of the mutual capacitance, formed of a same metal layer, and a second protective layer disposed on the first metal wire and the second metal wire; the first metal wire and the second metal wire being insulated from each other, the first metal wire forming a grid pattern corresponding to shape of the first direction electrodes of the mutual capacitance, the second metal wire forming a grid pattern corresponding to the second direction electrodes of the mutual capacitance; the first protective layer being disposed with a via corresponding to the bridge point, and the second metal wire being connected to the bridge point through the via; grid of the grid patterns being formed on a light-shielding layer between sub-pixels of the display device.
a first via disposed on the color-resist layer for electrically connecting a drain of the TFT and a pixel electrode;
the drain of the TFT comprising a drain body disposed corresponding to the first via, and a first extending portion, a second extending portion, and a third extending portion formed by outwardly protruding from edges of the drain body.

### Claim 2 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the grid size of the grid pattern is substantially equal to or substantially an integer multiple of size of the sub-pixel of the display device.

### Claim 3 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the metal mesh structure further comprises an edge wire and a bonding pad, the edge wire is disposed on an edge of the metal mesh structure, the bonding pad is disposed at one end of the metal mesh structure, and the first metal wire and the second metal wire are respectively connected to the corresponding bonding pads by corresponding edge wires.

### Claim 4 (depends on 3)

The metal mesh touch display structure as claimed in claim 3, wherein the bonding pad is connected to an external driving chip providing driving signal.

### Claim 5 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the first metal wire and the second metal wire are designed to have width unrecognizable to naked eyes.

### Claim 6 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the bonding pad is connected to an external driving chip providing driving signal.

### Claim 7 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the second protective layer is a silicon nitride or organic thin film.

### Claim 8 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the display device is a TFT-LCD display panel or an OLED display panel.

### Claim 9 (depends on 1)

The metal mesh touch display structure as claimed in claim 1, wherein the display device is a flexible display panel, and the first protective layer and the second protective layer are made of soft materials.

### Claim 10 (depends on 1)

A manufacturing method of metal mesh touch display structure as claimed in claim 1, comprising:
Step 10: forming a first metal layer on a display device to form a bridge point;
Step 20: forming a first protective layer on the bridge point;
Step 30: forming a via on the first protective layer at location corresponding to the bridge point;
Step 40: forming a second metal layer on the first protective layer to form a first metal wire and a second metal wire, the second metal wire connected to the bridge point through the via;
Step 50: forming a second protective layer on the first metal wire and the second metal wire.