Liquid crystal display and fabricating method thereof

• US 6,999,060 B2
• Filed: 12/18/2002
• Issued: 02/14/2006
• Est. Priority Date: 12/22/2001
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Choo, Kyo Seop
• Primary Examiner(s): Kim, Robert
• Assistant Examiner(s): Nguyen, Hoan C.
• Application Number:
  US10/325,045
• Publication Number:
  US 20030117542A1
• Time in Patent Office: 1,154 Days
• Field of Search: 349/43, 349/139, 349/42, 257/59, 257/72, 345/92, 345/100, 345/104
• US Class Current: 349/139
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio

Abstract

Disclosed are a liquid crystal display and a fabricating method thereof enabling to improve an opening ratio of the liquid crystal display by modifying a structure of a thin film transistor. Each pixel of the liquid crystal display includes a gate line formed on a substrate in one direction with a predetermined interval from another one, a data line formed in a direction perpendicular to the gate line so as to define a pixel area, a thin film transistor formed on the gate line at an intersection between the gate and data lines, and a pixel electrode formed in the pixel area.

Claims

1. A liquid crystal display comprising:

a gate line formed on a substrate in a first direction;

a data line formed in a second direction defining a pixel area with the gate line;

a thin film transistor formed on the gate line at an intersection between the gate and data lines, the thin film transistor containing a semiconductor layer formed over the gate line at the intersection between the gate and data lines, the semiconductor layer extending from the intersection along the first direction and completely overlapped by the gate line; and

a pixel electrode formed in the pixel area, wherein the gate line has one or more extensions in an area that overlaps the semiconductor layer such that the extensions are present on opposite sides of the gate line if more than one extension is present, and a width of each extension is substantially smaller than a width of the gate line in which no extension is present.

2. The liquid crystal display of claim 1, wherein the thin film transistor further comprises a drain electrode completely overlapped by the gate line.

3. The liquid crystal display of claim 2, wherein a connection point between the pixel electrode and the drain electrode is completely overlapped by the gate line.

4. The liquid crystal display of claim 2, wherein the thin film transistor further comprises a source electrode completely overlapped by the data line.

5. The liquid crystal display of claim 1, wherein the thin film transistor further comprises a source electrode completely overlapped by the data line.

6. The liquid crystal display of claim 1, wherein the gate line has symmetrical extensions in an area that overlaps the semiconductor layer.

7. The liquid crystal display of claim 6, wherein the extensions terminate at the intersection of the gate and data lines.

8. The liquid crystal display of claim 1, wherein at least one of the extensions terminates at the intersection of the gate and data lines.