Thin film transistor liquid crystal display and method for manufacturing the same

• US 6,191,835 B1
• Filed: 04/16/1998
• Issued: 02/20/2001
• Est. Priority Date: 04/18/1997
• Status: Expired due to Term

• Current Assignee: BOE HYDIS Technology Company Limited (SK Hynix Inc.)
• Original Assignee: Hyundai Electronics Industries Co. Ltd. (SK Hynix Inc.)
• Inventors: Choi, Woo Ho
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): TON, MINH TOAN T
• Application Number:
  US09/061,049
• Time in Patent Office: 1,041 Days
• Field of Search: 349/42, 349/43, 349/106, 349/110, 349/187, 349/138
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence

Abstract

A color filter layer covering both a thin film transistor and a pixel electrode which are formed on a lower substrate. A portion of the color filter layer positioned on the thin film transistor serves a protection layer of the thin film transistor and the other portion of the color filter layer serves a conventional color filter layer which were conventionally formed on an upper substrate opposite to the lower substrate. Therefore, the process number for the LCD is decreased and thus the manufacturing cost of the LCD is reduced.

Claims

1. A liquid crystal display comprising:

a first substrate;

a second substrate opposite to said first substrate;

a switching device formed on a portion of an opposing surface of said first substrate;

a color filter layer formed on the entire opposing surface of said first substrate provided with said switching device;

a first electrode formed on the color filter layer positioned on the other portion of the opposing surface of said first substrate and electrically connected to said switching device;

a black matrix formed on a portion of an opposing surface of said second substrate corresponding to said switching device; and

a second electrode formed on the entire opposing surface of said second substrate provided with said black matrix.

2. The liquid crystal display according to claim 1, wherein said first electrode is a pixel electrode, said second electrode is a common electrode, said first substrate is a lower substrate and said second substrate is an upper electrode.

3. The liquid crystal display according to claim 1, wherein a portion of said color filter layer positioned on said switching device is a protection layer of said switching device.

4. The liquid crystal display according to claim 1, wherein said switching device is an etch stopper inverse staggered type thin film transistor.

5. The liquid crystal display according to claim 2, wherein a portion of said color filter layer positioned on said switching device is a protection layer of said switching device.

6. The liquid crystal display according to claim 2, wherein said switching device is an etch stopper inverse staggered type thin film transistor.

7. The liquid crystal display according to claim 1, wherein said color filter layer has about 1 to 3 μ

m in thickness.

8. A liquid crystal display comprising:

a lower substrate;

an upper substrate opposite to said lower substrate;

an etch stopper inverse staggered type thin film transistor formed on a portion of an opposing surface of said lower substrate;

a color filter layer formed on the entire opposing surface of said lower substrate provided with said etch stopper inverse staggered type thin film transistor;

a pixel electrode formed on said color filter layer positioned on the other portion of an opposing surface of said lower substrate and electrically connected to said etch stopper inverse staggered type thin film transistor;

a black matrix formed on a portion of an opposing surface of said upper substrate corresponding to said etch stopper inverse staggered type thin film transistor; and

a common electrode formed on the entire opposing surface of said upper substrate provided with said black matrix.

9. The liquid crystal display according to claim 8, wherein a portion of said color filter layer positioned on said etch stopper inverse staggered type thin film transistor is a protection layer of said etch stopper inverse staggered thin film transistor.

10. The liquid crystal display according to claim 8, wherein said color filter layer has about 1 to 3 μ

m in thickness.

11. A method for manufacturing a liquid crystal display comprising the steps of:

preparing a first substrate and a second substrate;

forming a switching device on a portion of an opposing surface of said first substrate;

forming a color filter layer on the entire opposing surface of said first substrate provided with said switching device;

forming a contact hole at a portion of said color filter layer so as to expose to a portion of said switching device;

forming a first electrode on a portion of said color filter layer including said contact hole, in order to electrically connect said switching device to said first electrode;

forming a black matrix on a portion of an opposing surface of said second substrate corresponding to said switching device; and

forming a second electrode on the entire opposing surface of said second substrate provided with said black matrix.

12. The method according to claim 11, wherein said first electrode is a pixel electrode, said second electrode is a common electrode, said first substrate is a lower substrate and said second substrate is an upper electrode.

13. The method according to claim 11, wherein a portion of said color filter layer positioned on said switching device is a protection layer of said switching device.

14. The method according to claim 11, wherein said switching device is an etch stopper inverse staggered type thin film transistor.

15. The method according to claim 12, wherein a portion of said color filter layer positioned on said switching device is a protection layer of said switching device.

16. The method according to claim 12, wherein said switching device is an etch stopper inverse staggered type thin film transistor.

17. The method according to claim 11, wherein said color filter layer has about 1 to 3 μ

m in thickness.

18. A method for manufacturing a liquid crystal display comprising the steps of:

preparing a lower substrate and an upper substrate;

forming an etch stopper inverse staggered type thin film transistor on a portion of an opposing surface of said lower substrate;

forming a color filter layer on the entire opposing surface of said lower substrate provided with said etch stopper inverse staggered type thin film transistor;

forming a pixel electrode on a portion of an opposing surface of said color filter layer, said pixel electrode electrically connected to said etch stopper inverse staggered type thin film transistor;

forming a black matrix on a portion of an opposing surface of said upper substrate corresponding to said etch stopper inverse staggered type thin film transistor; and

forming a common electrode on the entire opposing surface of said upper substrate provided with said black matrix.

19. The method according to claim 18, wherein a portion of said color filter layer positioned on said etch stopper inverse staggered type thin film transistor is a protection layer of said etch stopper inverse staggered thin film transistor.

20. The method according to claim 18, wherein said color filter layer has about 1 to 3 μ

m in thickness.