# US 7,612,851 B2 · Method of manufacturing a liquid crystal display device

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- Number: US 7,612,851 B2
- Document ID: US7612851B2
- Status: Granted
- Kind: B2
- Application number: 11/498,692
- Filed: 2006-08-03
- Published: 2007-02-22
- Granted: 2009-11-03
- Earliest claimed: 2005-08-18
- Assignees: Samsung Electronics Co., Ltd.; Seoul National University Industry Foundation
- Inventors: Sin-Doo Lee; Eun-Je Jang; Hyung-Jun Song
- Web page: https://patentgrep.com/patent/US7612851B2

## CPC

- G02F 1/133753: {with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle}
- G02F 1/1393: {the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F1/1396, G02F1/141 take precedence)}
- 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

## Abstract

A method of manufacturing a liquid crystal display (LCD) device is provided. In the method, a vertical alignment layer having a first area and a second area is formed on a substrate. A first plasma gas is sprayed onto the first area with first spraying conditions under atmospheric pressure. A second plasma gas is sprayed onto the second area with second spraying conditions under atmospheric pressure.

## Claims

### Claim 1

A method of manufacturing an LCD device, the method comprising:
forming an alignment layer having a first surface characteristic on a substrate;
spraying plasma gas onto a portion of the alignment layer under atmospheric pressure, the portion of the alignment layer having a second surface characteristic different than the first surface characteristic from the spraying plasma gas onto a portion of the alignment layer; and
spraying the plasma gas onto all regions of the alignment layer under atmospheric pressure, the all regions of the alignment layer having a third surface characteristic different than the first surface characteristic from the spraying the plasma gas onto all regions of the alignment layer.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the spraying plasma gas onto a portion of the alignment layer comprises disposing a mask on the substrate, the mask exposing the portion of the alignment layer, and
wherein the plasma gas is sprayed onto all regions of the alignment layer subsequent to the portion of the alignment layer being sprayed, the all regions of the alignment layer including the previously sprayed portion of the alignment layer.

### Claim 3 (depends on 2)

The method of claim 2, wherein the spraying plasma gas onto a portion of the alignment layer comprises:
spraying the plasma gas onto a first area of the alignment layer with a first mask exposing the first area; and
spraying the plasma gas onto a second area of the alignment layer with a second mask exposing the second area;
wherein the first area and the second area are alternately disposed on the alignment layer.

### Claim 4 (depends on 2)

The method of claim 2, wherein the third surface characteristic of the portion of the alignment layer after the spraying of the plasma gas onto all regions of the alignment layer, is different than the second surface characteristic of the portion of the alignment layer.

### Claim 5 (depends on 1)

The method of claim 1, wherein each of the first, second and third surface characteristics include at least one of a tilt direction and a tilt angle.