Method of manufacturing spacers on a color filter substrate

• US 7,738,067 B2
• Filed: 02/16/2005
• Issued: 06/15/2010
• Est. Priority Date: 02/17/2004
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Chen, Yu-Jen, Lin, Ching-Shan, Wu, Yuan-Liang
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): Merlin; Jessica M
• Application Number:
  US11/059,074
• Publication Number:
  US 20050179853A1
• Time in Patent Office: 1,945 Days
• Field of Search: 349/38, 349/39, 349 41- 53, 349106-111, 349/129, 349155-157
• US Class Current: 349/155
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13415 Drop filling process

Abstract

A liquid crystal display device, a color filter substrate and a protruding structure, and a manufacturing method thereof are provided. The color filter substrate includes a transparent substrate, a black matrix, a plurality of color filters, a plurality of first protruding structures, and a plurality of second protruding structures. The black matrix is disposed on the transparent substrate and exposes part of the transparent substrate for defining a plurality of first openings, a plurality of second openings, and a plurality of pixel regions, wherein the size of each first opening is different from the size of each second opening. In addition, the color filters are disposed in the pixel regions. The first protruding structures and the second protruding structures are disposed on the transparent substrate, wherein the first protruding structures correspond to the first openings respectively and the second protruding structures correspond to the second openings respectively.

Claims

1. A method of fabricating a liquid crystal display device comprising:

providing a first substrate and a second substrate;

forming a masking pattern on the surface of the first substrate, the masking pattern defining an open area as a spacer area in the masking pattern;

forming a color filter pattern on the surface of the first substrate, wherein the color filter pattern exposes the spacer area and a portion of the masking pattern around the spacer area;

forming a common electrode on the masking pattern, the color filter pattern and the spacer area;

coating a photoresistance on an interior surface of the first substrate;

illuminating a light on an exterior surface of the first substrate and through the spacer area of masking pattern and common electrode to irradiate the photoresistance; and

developing the photoresistance to form a spacer directly over the spacer area, wherein the spacer is formed directly on the common electrode.

2. The method of fabricating a liquid crystal display device of claim 1, wherein the masking pattern is a first metal of an auxiliary capacitor of a thin film transistor.

3. The method of fabricating a liquid crystal display device of claim 1, wherein the masking pattern further comprises a second metal of an auxiliary capacitor of a thin film transistor.

4. The method of fabricating a liquid crystal display device of claim 1:

wherein the masking pattern further comprises a first opening, the first opening being a first size;

wherein the masking pattern further comprises a second opening, the second opening being a second size, the second size being larger than the first size;

wherein, after the photoresistance is developed, the method further comprises;

forming a first protruding structure corresponding to the first opening, the first protruding structure having a first protruding structure height;

forming a second protruding structure corresponding to the second opening, the second protruding structure having a second protruding structure height, the second protruding structure height being smaller than the first protruding structure height;

wherein the first substrate and the second substrate define a cell gap, the cell gap having a cell gap height, and the first height is greater than the cell gap height.

5. A method of fabricating a color filter substrate for a liquid crystal display device comprising:

providing a transparent substrate having a first side and a second side;

forming a black matrix on the first side of the transparent substrate, wherein a void of the black matrix exposes a first part of the first side of the transparent substrate, and wherein a second part of the first side of the transparent substrate is exposed to define a pixel area;

forming a color filter pattern on the first side of the transparent substrate, the color filter pattern defining a first open area as a spacer area, the color filter pattern covering a first portion of the void of the black matrix and exposing the spacer area;

forming a common electrode on the black matrix, the color filter pattern and the spacer area, wherein a penetration ratio for a light for hardening a spacer within the spacer area is greater than 54.45% and less than 81.77%;

coating a photoresistance on the first side of the transparent substrate;

exposing the second side of the transparent substrate through the spacer area of the color filter pattern and the common electrode to irradiate the photoresistance with light; and

developing the photoresistance to form a spacer over the spacer area and directly on the common electrode.

6. The method of fabricating the color filter substrate of claim 5 further comprising:

wherein the first open area has a first open area size;

forming a second open area in the color filter pattern exposing a first portion of the pixel area, the second open area having a second open area size, the second open area size being different from the first open area size;

wherein the spacer has a spacer height;

forming a protruding structure corresponding to the second open area, the protruding structure having a protruding structure height, the protruding structure height being smaller than the spacer height, and the protruding structure is an alignment structure; and

wherein the spacer is the same color as the color filter pattern covering the first portion of the void of the black matrix.

7. A method of fabricating a liquid crystal display device comprising:

providing a transparent substrate having a first side and a second side;

forming a black matrix on the first side;

exposing part of the first side of the transparent substrate by providing a first open area of the black matrix to define a spacer area and a second open area of the black matrix to define a pixel area;

forming a color filter pattern on the first side of the transparent substrate, the color filter pattern forming a first void exposing a portion of the black matrix around the spacer area and exposing the spacer area;

forming a common electrode on the black matrix, the color filter pattern and the spacer area, wherein a penetration ratio outside the first open area for a light having a wavelength of 335 nm is less than the penetration ratio outside the first open area for a light having a wavelength of 365 nm, 405 nm, or 437 nm;

coating a photoresistance on the first side of the transparent substrate;

exposing the second side of the transparent substrate through the spacer area and the common electrode to irradiate the photoresistance with light;

developing the photoresistance to form a spacer directly over the spacer area and directly on the common electrode;

providing a transistor substrate having a plurality of pixel electrodes;

binding the transistor substrate to the transparent substrate; and

filling a liquid crystal material between the transistor substrate and the transparent substrate.

8. The method of fabricating the color filter substrate of claim 7, further comprising:

wherein the first open area has a first open area size;

wherein the color filter pattern forms a second void exposing a first portion of the pixel area, the second open area having a second open area size, the second open area size being different from the first open area size;

wherein the spacer has a spacer height;

forming a protruding structure corresponding to the second open area, the second protruding structure having a protruding structure height, the second height being smaller than the spacer height, and the protruding structure is an alignment structure.