Method of manufacturing a liquid crystal display device

• US 20070040973A1
• Filed: 08/03/2006
• Published: 02/22/2007
• Est. Priority Date: 08/18/2005
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.), Seoul National University Industry Foundation (Seoul National University)
• Original Assignee: Samsung Electronics Co. Ltd., Seoul National University Industry Foundation (Seoul National University)
• Inventors: Lee, Sin-Doo, Song, Hyung-Jun, Jang, Eun-Je
• Granted Patent: US 7,612,851 B2
• Time in Patent Office: Days
• US Class Current: 349/124
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: 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

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

1. A method of manufacturing a liquid crystal display (LCD) device, the method comprising:

forming a vertical alignment layer on a substrate, the vertical alignment layer including a first area and a second area alternately defined thereon;

spraying a first plasma gas onto the first area with first spraying conditions under atmospheric pressure; and

spraying a second plasma gas onto the second area with second spraying conditions under atmospheric pressure.

2. The method of claim 1, wherein the substrate comprises a plurality of pixel areas and both the first area and the second areas are defined in each of the pixel areas.

3. The method of claim 1, wherein the spraying a first plasma gas and the spraying a second plasma gas comprises inclining a spraying direction of the plasma gas with respect to an upper surface of the substrate by a predetermined angle.

4. The method of claim 3, wherein a first spraying angle between a direction perpendicular to an upper surface of the substrate and the spraying direction of the first plasma gas is different from a second spraying angle between a direction perpendicular to an upper surface of the substrate and the spraying direction of the second plasma gas.

5. The method of claim 1, wherein the spraying a first plasma gas and the spraying a second plasma gas comprises spraying the first and second plasma gases through a releasing part, and a first spraying distance between the releasing part and the first area is different from a second spraying distance between the releasing part and the second area.

6. The method of claim 1, wherein the spraying a first plasma gas and the spraying a second plasma gas comprise a first spraying time for which the first plasma gas is sprayed and a second spraying time for which the second plasma gas is sprayed, respectively, the first spraying time being different from the second spraying time.

7. The method of claim 1, further comprising disposing a mask on the substrate, the mask exposing the first area or the second area.

8. The method of claim 1, wherein the first spraying conditions comprise a first spraying angle between a direction perpendicular to an upper surface of the substrate and a spraying direction of the first plasma gas, a first spraying distance between a releasing part and the first area and a first spraying time for which the first plasma gas is sprayed, and

the second spraying conditions comprise a second spraying angle between a direction perpendicular to the upper surface of the substrate and a spraying direction of the second plasma gas, a second spraying distance between the releasing part and the second area and a second spraying time for which the second plasma gas is sprayed;

wherein at least one of the first spraying angle, the first spraying distance, and the first spraying time is different from the second spraying angle, the second spraying distance and the second spraying time, respectively.

9. A method of manufacturing an LCD device, the method comprising:

forming a lower substrate, the forming a lower substrate comprising;

forming a first vertical alignment layer on the lower substrate including a pixel electrode, the first vertical alignment layer including a first area and a second area alternately defined thereon;

spraying a first plasma gas onto the first area with first spraying conditions under atmospheric pressure; and

spraying a second plasma gas onto the second area with second spraying conditions under atmospheric pressure;

forming an upper substrate, the forming an upper substrate comprising;

forming a second vertical alignment layer on the upper substrate including a common electrode, the second vertical alignment layer including a third area and a fourth area alternately defined thereon;

spraying a third plasma gas onto the third area with third spraying conditions under atmospheric pressure; and

spraying a fourth plasma gas onto the fourth area with fourth spraying conditions under atmospheric pressure; and

disposing a liquid crystal layer between the lower substrate and the upper substrate, such that the first area faces the third area and the second area faces the fourth area.

10. The method of claim 9, wherein the first spraying conditions are substantially the same as the fourth spraying conditions and the second spraying conditions are substantially the same as the third spraying conditions.

11. The method of claim 9, wherein the first spraying conditions are substantially the same as the third spraying conditions and the second spraying conditions are substantially the same as the fourth spraying conditions.

12. The method of claim 9, wherein the lower substrate comprises a plurality of pixel areas, a pixel area being defined by a plurality of signal lines and the first and second areas being defined in each of the pixel areas;

and

wherein the first area and the second area comprise an alignment direction being the same in each of the pixel areas and inclined relative to the signal lines.

13. The method of claim 9, wherein the lower substrate comprises a plurality of pixel areas, a pixel area being defined by a plurality of signal lines and the first and second areas being defined in each of the pixel areas;

and

wherein the first area and the second area comprise an alignment direction being the same in each of the pixel areas and substantially parallel to the signal lines.

14. The method of claim 9, wherein the lower substrate comprises a plurality of pixel areas, a pixel area being defined by a plurality of signal lines and the first and second areas being defined in each of the pixel areas;

wherein the first area and the second area comprises an alignment direction being the same in each of the pixel areas within one pixel row and inclined relative to the signal lines, the alignment direction in an adjacent pixel row being different that the alignment direction in the one pixel row.

15. The method of claim 9, wherein the lower substrate comprises a plurality of pixel areas, a pixel area being defined by a plurality of signal lines and the first and second areas being defined in each of the pixel areas;

wherein each pixel area comprises a first portion including a first alignment direction and a second portion including a second alignment direction; and

wherein the first alignment direction and the second alignment direction are the same in each of the pixel areas and inclined relative to the signal lines.

16. A method of manufacturing an LCD device, the method comprising:

forming an alignment layer on a substrate;

spraying plasma gas onto a portion of the alignment layer under atmospheric pressure; and

spraying the plasma gas onto all regions of the alignment layer under atmospheric pressure.

17. The method of claim 16, 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.

18. The method of claim 16, 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.