# US 11,307,721 B2 · Touch panel and method of manufacturing the same

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- Number: US 11,307,721 B2
- Document ID: US11307721B2
- Status: Granted
- Kind: B2
- Application number: 15/957,839
- Filed: 2018-04-19
- Published: 2018-08-23
- Granted: 2022-04-19
- Earliest claimed: 2014-12-02
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Ki Hyun Cho; Cheol Kyu Kim; Sung kyun Park; Sun Haeng Cho
- Web page: https://patentgrep.com/patent/US11307721B2

## CPC

- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- H05K 3/064: {Photoresists}
- H05K 3/10: in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- 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
- H10P 76/202: {for lift-off processes}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10

## Abstract

A touch panel and a method of manufacturing the touch panel are provided. The touch panel includes a substrate comprising a wiring area and a sensor area, a sensing pattern located on a surface of the substrate in the sensor area, and a wiring line located on the surface of the substrate in the wiring area and electrically connected to the sensing pattern. The sensing pattern includes a plurality of first fine metal lines arranged irregularly in a mesh, and a first photosensitive layer pattern residue located between at least two of the first fine metal lines.

## Claims

### Claim 1

A touch panel comprising:
a substrate comprising a wiring area and a sensor area;
a plurality of sensing patterns located on a surface of the substrate in the sensor area and arranged in a regular pattern; and
a wiring line located on the surface of the substrate in the wiring area and electrically connected to the plurality of sensing patterns,
wherein each of the plurality of sensing patterns comprises a plurality of first fine metal lines arranged within a corresponding sensing pattern in an irregular mesh pattern when viewed in a plan view of the touch panel, and a first photosensitive layer pattern residue located between at least two of the first fine metal lines,
wherein an entirety of the first photosensitive layer pattern residue is made of a photosensitive resin,
wherein the plurality of first fine metal lines are made of a same material, and
wherein the plurality of first fine metal lines and the first photosensitive layer pattern residue are both disposed directly on the surface of the substrate.

### Claim 2 (depends on 1)

The touch panel of claim 1, wherein the wiring line includes the same material.

### Claim 3 (depends on 2)

The touch panel of claim 2, wherein each of the plurality of sensing patterns and the wiring line comprises any one of molybdenum (Mo), silver (Ag), titanium (Ti), aluminum (Al), copper (Cu), gold (Au), platinum (Pt), and nickel (Ni), or an alloy thereof.

### Claim 4 (depends on 1)

The touch panel of claim 1, wherein the first photosensitive layer pattern residue is made of a positive photosensitive resin.

### Claim 5 (depends on 1)

The touch panel of claim 1, wherein the wiring line comprises a plurality of second fine metal lines arranged in an irregular mesh pattern, and a second photosensitive layer pattern residue located between at least two of the second fine metal lines.

### Claim 6 (depends on 1)

The touch panel of claim 1, wherein the substrate is a transparent substrate.

### Claim 7 (depends on 1)

The touch panel of claim 1, wherein the substrate is made of an insulating material selected from a group comprising glass, plastic, silicon and synthetic resin.

### Claim 8 (depends on 1)

The touch panel of claim 1, wherein the substrate is made of a flexible film.

### Claim 9 (depends on 1)

The touch panel of claim 1, wherein the substrate further comprises a non-sensor area, and none of the plurality of sensing patterns and the wiring line is located in the non-sensor area.

### Claim 10 (depends on 1)

The touch panel of claim 1, wherein the plurality of sensing patterns comprises a plurality of first sensing patterns extending in a first direction and a plurality of second sensing patterns extending in a second direction that is different from the first direction.