# US 9,519,366 B2 · Touch sensor

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- Number: US 9,519,366 B2
- Document ID: US9519366B2
- Status: Granted
- Kind: B2
- Application number: 14/273,459
- Filed: 2014-05-08
- Published: 2014-11-13
- Granted: 2016-12-13
- Earliest claimed: 2013-05-10
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Jang Ho Park; Woon Chun Kim; Jin Uk Lee; Nam Keun Oh
- Web page: https://patentgrep.com/patent/US9519366B2

## CPC

- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 3/045: using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
- 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
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A touch sensor includes a transparent substrate, and an electrode pattern formed on the transparent substrate. The electrode pattern is formed by stacking at least two or more electrode layers, thereby enhancing the anti-corrosion and visibility of electrode patterns and ensuring the adhesive reliability of the transparent substrate and the electrode patterns.

## Claims

### Claim 1

A touch sensor comprising:
a transparent substrate; and
an electrode pattern formed on the transparent substrate,
wherein the electrode pattern is formed by stacking two or more electrode layers,
and at least one of the two or more electrode layers enhances either one or both of anticorrosion of an exposed portion of the electrode pattern and adhesion between the electrode pattern and the transparent substrate.

### Claim 2 (depends on 1)

The touch sensor as set forth in claim 1, wherein the electrode pattern is formed by sequentially stacking, from one surface of the transparent substrate, a base layer as a first electrode layer and a conductive layer as a second electrode layer.

### Claim 3 (depends on 2)

The touch sensor as set forth in claim 2, wherein the electrode pattern is formed by further stacking a surface layer as a third electrode layer on the second electrode layer.

### Claim 4 (depends on 3)

The touch sensor as set forth in claim 3, wherein a stack-direction thickness d1 of the first electrode layer, a stack-direction thickness d2 of the second electrode layer, and a stack-direction thickness d3 of the third electrode layer satisfy a following conditional expression: d1<d3<d2.

### Claim 5 (depends on 3)

The touch sensor as set forth in claim 3, wherein the sum of a stack direction thickness d1 of the first electrode layer, a stack-direction thickness d2 of the second electrode layer, and a stack-direction thickness d3 of the third electrode layer is 0.05 μm to 2 μm.

### Claim 6 (depends on 3)

The touch sensor as set forth in claim 3, wherein a stack-direction thickness of the first electrode layer is 0.01 μm to 1.935 μm.

### Claim 7 (depends on 3)

The touch sensor as set forth in claim 3, wherein a stack-direction thickness of the second electrode layer is 0.04 μm to 1.975 μm.

### Claim 8 (depends on 3)

The touch sensor as set forth in claim 3, wherein a stack-direction thickness of the third electrode layer is 0.015 μm to 1.95 μm.

### Claim 9 (depends on 3)

The touch sensor as set forth in claim 3, wherein a stack-direction thickness d1 of the first electrode layer, a stack-direction thickness d2 of the second electrode layer, and a stack-direction thickness d3 of the third electrode layer satisfy a following conditional expression: 2%≦d2/(d1+d2+d3)×100≦98.75%.

### Claim 10 (depends on 2)

The touch sensor as set forth in claim 2, wherein the first electrode layer is formed to have a smaller thickness in the stack direction than that of the second electrode layer.

### Claim 11 (depends on 1)

The touch sensor as set forth in claim 1, wherein the transparent substrate is formed of glass or temperate glass.

### Claim 12 (depends on 1)

The touch sensor set forth in claim 1, further comprising: a second electrode pattern disposed apart from the first electrode pattern and formed by
stacking two or more electrode layers.

### Claim 13 (depends on 12)

The touch sensor set forth in claim 12, wherein the second electrode pattern is disposed on the transparent substrate.

### Claim 14

A touch sensor comprising:
a transparent substrate;
a first electrode pattern disposed on the transparent substrate; and
a second electrode pattern insulated from the first electrode pattern,
wherein the first electrode pattern comprises a first layer, a second layer, and a third
layer,
wherein the second layer has a higher electrical conductivity than the first and third layers, the third layer comprises a material that reduces the visibility of the first electrode pattern and prevents corrosion of the first electrode pattern, and the first layer comprises a material that has greater adhesion to the transparent substrate than the second layer.

### Claim 15 (depends on 14)

The touch sensor set forth in claim 14, wherein the third layer comprises the same material as the first layer.

### Claim 16 (depends on 15)

The touch sensor as set forth in claim 15, wherein a stack direction thickness d1 of the first layer, a stack-direction thickness d2 of the second layer, and a stack-direction thickness d3 of the third layer satisfy a following conditional expression: d1<d3<d2.