Liquid crystal display panel and method of fabricating the same

• US 6,975,379 B2
• Filed: 12/29/2003
• Issued: 12/13/2005
• Est. Priority Date: 06/24/2003
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Kim, Jeong Hyun, Jun, Jae Hong
• Primary Examiner(s): Nguyen, Dung T.
• Assistant Examiner(s): DUONG, TAI V
• Application Number:
  US10/745,653
• Publication Number:
  US 20040263764A1
• Time in Patent Office: 715 Days
• Field of Search: 349/43, 349/106, 349/110, 349/111, 349/141, 349/187, 349/122, 349/138, 349/155, 349/156, 349/123
• 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 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

A liquid crystal display panel and a fabricating method thereof are capable of lowering the manufacturing costs by reducing the amount of material and the number of masks, and also of making spacers at locations which are desired. The liquid crystal display panel includes: a black matrix formed on a first substrate; a color filter having a first through-hole for exposing the black matrix to the regions partitioned by the black matrix; a planarization layer having a second through-hole overlapped with the first through-hole; and a spacer formed at the first and second through-holes.

Claims

1. A liquid crystal display panel, comprising:

a black matrix formed on a first substrate;

a color filter having a first through-hole for exposing the black matrix to a region of the black matrix;

a planarization layer having a second through-hole overlapped with the first through-hole; and

a spacer formed in the first and second through-holes.

2. The liquid crystal display panel according to claim 1, wherein the spacer contacts the black matrix and extends away from the black matrix approximately 2~5 μ

m.

3. The liquid crystal display panel according to claim 1, wherein the first through-hole has a depth in the range of approximately 1~2 μ

m.

4. The liquid crystal display panel according to claim 3, wherein the first through-hole has a width in the range of approximately 10~70 μ

m.

5. The liquid crystal display panel according to claim 1, wherein a cross-sectional area of the second through-hole is greater than or equal to a cross-sectional area of the first through-hole.

6. The liquid crystal display panel according to claim 1, further comprising:

a second substrate facing the first substrate;

a pixel electrode formed on the second substrate; and

a common electrode producing a horizontal electric field together with the pixel electrode.

7. The liquid crystal display panel according to claim 1, wherein the spacer is formed of an organic material.

8. The liquid crystal display panel according to claim 7, further comprising:

an alignment layer covering the planarization layer and the spacer.

9. The liquid crystal display panel according to claim 8, wherein the spacer forms a bulge in the planarization layer.

10. A method of fabricating a liquid crystal display panel, comprising steps of:

forming a black matrix on a first substrate;

forming a color filter having a first through-hole for exposing the black matrix;

forming a planarization layer having a second through-hole overlapped with the first through-hole; and

forming a spacer located in the first and second through-holes, overlapped with the black matrix.

11. The method of fabricating a liquid crystal display panel according to claim 10, wherein the spacer is projected from the planarization layer.

12. The method of fabricating a liquid crystal display panel according to claim 10, wherein the spacer has a thickness in the range of approximately 2~5 μ

m.

13. The method of fabricating a liquid crystal display panel according to claim 10, wherein the first through-hole has a depth in the range of approximately 1~2 μ

m.

14. The method of fabricating a liquid crystal display panel according to claim 13, wherein the first through-hole has a cross-sectional area in the range of approximately 10~70 μ

m.

15. The method of fabricating a liquid crystal display panel according to claim 11, wherein a cross-sectional area of the second through-hole is greater than or equal to a cross-sectional area of the first through-hole.

16. The method of fabricating a liquid crystal display panel according to claim 10, wherein the spacer is formed using an ink-jet method.

17. The method of fabricating a liquid crystal display panel according to claim 10, further comprising steps of:

forming a second substrate facing the first substrate;

forming a pixel electrode on the second substrate; and

forming a common electrode for operating together with the pixel electrode to produce a horizontal electric field.

18. The method of fabricating a liquid crystal display panel according to claim 10, further comprising forming an alignment layer covering the planarization layer.

19. The method of fabricating a liquid crystal display panel according to claim 10, wherein the spacer is formed of an organic material.

20. A method of fabricating a liquid crystal display panel, comprising steps of:

forming a black matrix on a substrate;

forming a color filter on the substrate;

forming a planarization layer covering the color filter;

forming a through-hole penetrating both the color filter and the planarization layer to expose the black matrix; and

forming a spacer located in the through-hole, overlapped with the black matrix, and projected from the planarization layer.

21. The method of fabricating a liquid crystal display panel according to claim 20, further comprising forming an alignment layer covering the planarization layer.

22. The method of fabricating a liquid crystal display panel according to claim 20, wherein the color filter is also formed partially over the black matrix.

23. The method of fabricating a liquid crystal display panel according to claim 20, wherein the spacer is formed of an organic material.