# US 9,436,031 B2 · Liquid crystal display and manufacturing method thereof

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- Number: US 9,436,031 B2
- Document ID: US9436031B2
- Status: Granted
- Kind: B2
- Application number: 14/592,596
- Filed: 2015-01-08
- Published: 2016-01-07
- Granted: 2016-09-06
- Earliest claimed: 2014-07-07
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Bo Ram Lee; Sang Il Kim; Yong Seok Kim; Seung-Jin Baek; Dong-Min Lee
- Web page: https://patentgrep.com/patent/US9436031B2

## CPC

- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)}
- G02F 1/133377: {Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- H10D 86/021: {of multiple TFTs}
- H10D 86/0212: {comprising manufacture, treatment or coating of substrates}
- H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/40: OLEDs integrated with touch screens
- 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
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A liquid crystal display including: a substrate; a thin film transistor disposed on the substrate; a pixel electrode connected to the thin film transistor; a lower insulating layer facing the pixel electrode; and a touch sensor disposed on the lower insulating layer, the touch sensor including a first transparent conductive layer and a second transparent conductive layer. A plurality of microcavities is formed between the pixel electrode and the lower insulating layer. The microcavities form a liquid crystal layer including a liquid crystal material, the lower insulating layer has a matrix shape including a horizontal portion and a vertical portion, and the second transparent conductive layer overlaps the vertical portion of the lower insulating layer.

## Claims

### Claim 1

A liquid crystal display comprising:
a substrate;
a thin film transistor disposed on the substrate;
a pixel electrode connected to the thin film transistor;
a lower insulating layer facing the pixel electrode; and
a touch sensor disposed on the lower insulating layer, the touch sensor comprising a first transparent conductive layer and a second transparent conductive layer,
wherein:
a plurality of microcavities are formed between the pixel electrode and the lower insulating layer;
a liquid crystal layer comprising a liquid crystal material is disposed in the microcavities;
the lower insulating layer has a matrix shape comprising a horizontal portion and a vertical portion; and
the second transparent conductive layer overlaps the vertical portion of the lower insulating layer.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, further comprising:
a roof layer disposed on the lower insulating layer,
wherein the roof layer has a matrix shape comprising a horizontal portion and a vertical portion.

### Claim 3 (depends on 2)

The liquid crystal display of claim 2, wherein the second transparent conductive layer overlaps the vertical portion of the roof layer.

### Claim 4 (depends on 3)

The liquid crystal display of claim 3, wherein the vertical portion of the lower insulating layer overlaps the vertical portion of the roof layer, and the vertical portion of the lower insulating layer and the vertical portion of the roof layer cross a gate line connected to the thin film transistor.

### Claim 5 (depends on 1)

The liquid crystal display of claim 1, further comprising:
a roof layer disposed on the lower insulating layer; and
an upper insulating layer disposed on the roof layer,
wherein the roof layer comprises horizontal portions that are separated from each other, and the upper insulating layer contacts the vertical portion of the lower insulating layer.

### Claim 6 (depends on 5)

The liquid crystal display of claim 5, wherein the upper insulating layer comprises horizontal and vertical portions, and the vertical portions of the upper insulating layer and the lower insulating layer contact each other at a point that crosses the gate line.

### Claim 7 (depends on 6)

The liquid crystal display of claim 6, further comprising a sacrificial layer residual film disposed at a bottom of a portion where the vertical portions of the upper insulating layer and the lower insulating layer contact each other.

### Claim 8 (depends on 7)

The liquid crystal display of claim 7, wherein the upper insulating layer and the lower insulating layer cover an upper surface and a lateral surface of the sacrificial layer residual film.

### Claim 9 (depends on 1)

The liquid crystal display of claim 1, further comprising:
an island-shaped connector disposed at a portion where the first transparent conductive layer crosses the second transparent conductive layer,
wherein first transparent conductive layers are connected by the island-shaped connector.

### Claim 10 (depends on 9)

The liquid crystal display of claim 9, further comprising:
a first insulating layer configured to insulate the island-shaped connector from the second transparent conductive layer; and
a second insulating layer configured to insulate the first transparent conductive layer from the second transparent conductive layer.

### Claim 11 (depends on 1)

The liquid crystal display of claim 1, wherein:
the substrate comprises a display area and a peripheral area,
a pixel pad and a touch pad are disposed in the peripheral area, and the pixel pad does not overlap the touch pad.