Liquid crystal display device having a plurality of error detecting shorting bars and a method of manufacturing the same

• US 6,184,948 B1
• Filed: 01/12/1998
• Issued: 02/06/2001
• Est. Priority Date: 02/11/1997
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Sung Soo
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US09/005,587
• Time in Patent Office: 1,121 Days
• Field of Search: 349/40, 349/42, 349/54, 349/192, 349/46, 349/122, 349/138, 257/59, 257/72, 257/291, 257/208, 257/443, 345/92
• US Class Current: 349/54
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/136254 Checking; Testing
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line

Abstract

A method for manufacturing a liquid crystal display device on a substrate including the steps of forming a gate electrode, a gate line, a gate pad, a source pad, a first gate shorting bar, and a first source shorting bar using a first metal; forming a gate insulation layer, a semiconductor layer, and a doped semiconductor layer by sequentially depositing an insulation material, an intrinsic semiconductor material, and a doped semiconductor material, respectively; and forming a source electrode, a source line, a drain electrode, a second gate shorting bar, and a second source shorting bar using a second metal.

Claims

1. A method for manufacturing a liquid crystal display device on a substrate comprising the steps of:

forming a gate electrode, a gate line, a gate pad, a source pad, a first gate shorting bar, and a first source shorting bar using a first metal;

forming a gate insulation layer, a semiconductor layer, and a doped semiconductor layer by sequentially depositing an insulation material, an intrinsic semiconductor material, and a doped semiconductor material, respectively; and

forming a source electrode, a source line, a drain electrode, a second gate shorting bar, and a second source shorting bar using a second metal.

2. The method for manufacturing a liquid crystal display according to claim 1, further comprising the steps of:

forming a protection layer using an insulation material on the substrate including the source electrode;

forming a variety of contact holes including a gate contact hole over the gate pad, a source contact hole over the source pad, a gate shorting bar contact hole over the second gate shorting bar, and a source shorting bar contact hole over the second source shorting bar by patterning the protection layer, and

forming a gate terminal and a source terminal using a transparent conductive material on the substrate including the gate contact hole and the source contact hole.

3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the step of forming the variety of contact holes further includes forming a drain contact hole over the drain electrode, and

wherein the step of forming a gate terminal and a source terminal further includes the forming of a pixel electrode connected to the drain electrode.

4. The method for manufacturing a liquid crystal display device according to claim 1, wherein the first gate shorting bar connects respective gate pads in odd-numbered rows, and the second gate shorting bar connects respective gate pads in even-numbered rows.

5. The method for manufacturing a liquid crystal display device according to claim 1, wherein the first gate shorting bar connects respective gate pads in even-numbered rows, and the second gate shorting bar connects respective gate pads in odd-numbered rows.

6. The method for manufacturing a liquid crystal display device according to claim 1, wherein the first source shorting bar connects respective source pads in odd-numbered columns, and the second source shorting bar connects respective source pads in even-numbered columns.

7. The method for manufacturing a liquid crystal display device according to claim 1, wherein the first source shorting bar connects respective source pads in even-numbered columns, and the second source shorting bar connects respective source pads in odd-numbered columns.

8. A method for manufacturing a liquid crystal display device on a substrate comprising the steps of:

forming a first gate line, using a first metal;

forming a gate electrode, a second gate line covering the first gate line, a gate pad disposed at an end of the second gate line, a first gate shorting bar connected to the gate pad, a source pad, and a first source shorting bar connecting to the source pad, using a second metal;

forming a gate insulation layer by depositing an insulation material, forming a semiconductor layer by sequentially depositing and patterning an intrinsic semiconductor material, and forming a doped semiconductor layer by sequentially depositing and patterning a doped semiconductor material;

forming a source electrode, a source line connected to the source electrode, a drain electrode facing the source electrode, a second gate shorting bar, and a second source shorting bar, using a third metal;

forming a protection layer using an insulation material;

patterning the protection layer to form a drain contact hole over the drain electrode, a gate shorting bar contact hole over the second gate shorting bar, a source line contact hole over an end portion of the source line, and a source shorting bar contact hole over the second source shorting bar, and patterning the protection layer and the gate insulation layer to form a gate contact hole over the gate pad, and a source contact hole over the source pad; and

forming a pixel electrode, a gate terminal, and a source terminal, using a transparent conductive material.

9. The method for manufacturing a liquid crystal display device according to claim 8, wherein the first gate shorting bar connects to respective gate pads in odd-numbered rows, and the second gate shorting bar connects to respective gate pads in even-numbered rows.

10. The method for manufacturing a liquid crystal display device according to claim 8, wherein the first gate shorting bar connects to respective gate pads in even-numbered rows, and the second gate shorting bar connects to respective gate pads in odd-numbered rows.

11. The method for manufacturing a liquid crystal display device according to claim 8, wherein the first source shorting bar connects to respective source pads in odd-numbered columns, and the second source shorting bar connects to respective source pads in even-numbered columns.

12. The method for manufacturing a liquid crystal display device according to claim 8, wherein the first source shorting bar connects to respective source pads in even-numbered columns, and the second source shorting bar connects to respective source pads in odd-numbered columns.

13. A liquid crystal display device comprising:

a substrate;

a plurality of gate lines arrayed on the substrate;

a gate insulation layer covering the gate lines;

a plurality of source lines on the gate insulation layer;

a plurality of gate pads, each including a first metal and disposed respectively at each end of the gate lines, wherein the plurality of gate pads are numbered consecutively from 1 to N with N being a positive integer for identification;

a first gate shorting bar including said first metal, and connected to the odd-numbered gate pads;

a plurality of odd-numbered gate terminals, each including a transparent conductive material, and connected respectively with the odd-numbered gate pads;

a second gate shorting bar, including a second metal, disposed on the gate insulation layer and connected to the even-numbered gate pads; and

a plurality of even-numbered gate terminals, each including the transparent conductive material, and connected respectively with the even-numbered gate pads and the second gate shorting bar.

14. The liquid crystal display device according to the claim 13, further comprising:

a plurality of source pads, each including the first metal, and one of the plurality of source pads being disposed respectively at the end of each of the plurality of source lines;

a first source shorting bar including the first metal, and connected to the odd-numbered source pads;

a plurality of odd-numbered source terminals including the transparent conductive material, and connected respectively to the odd-numbered source pads;

a second source shorting bar, including the second metal, formed on the gate insulation layer; and

a plurality of even-numbered source terminals including the transparent conductive material, and connected respectively to the even-numbered source pads and to the second source shorting bar.

15. The liquid crystal display device according to claim 14, further comprising a doped semiconductor layer provided between the gate insulation layer and the plurality of source lines.