Forming method of liquid crystal layer using ink jet system

• US 20050046784A1
• Filed: 10/12/2004
• Published: 03/03/2005
• Est. Priority Date: 05/29/2001
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Hwang, Yong-Sup, Lee, Jae-Kyun, Chae, Gee-Sung
• Granted Patent: US 7,333,161 B2
• Time in Patent Office: Days
• US Class Current: 349/187
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode

Abstract

An array substrate and a method of manufacturing thereof are disclosed for a liquid crystal display device. The array substrate includes a substrate, a gate line disposed along a first direction on the substrate, a common line parallel to the gate line and spaced apart from the gate line, wherein the common line is made of the same material as the gate line. The array substrate also includes a gate insulating layer on the gate and common lines, a semiconductor layer on the gate insulating layer and a pixel electrode of transparent conductive material including a drain electrode portion. The drain electrode portion overlaps the semiconductor layer and a source electrode of transparent conductive material is spaced apart from the drain electrode portion. A passivation layer includes a first contact hole and an open portion over the pixel and source electrodes, the first contact hole exposing the source electrode and the open portion exposing the pixel electrode, respectively. A data line is disposed along a second direction on the passivation layer, and the data line connected to the source electrode through the first contact hole and crossing the gate line. Alternatively, a method of forming a liquid crystal layer on a substrate having a seal pattern includes preparing a liquid crystal material in a projecting portion, applying a vibration and a pressure to the projecting portion so as to emit the liquid crystal material from the projecting portion, and depositing the emitted liquid crystal material on the substrate.

Claims

1. An array substrate of a liquid crystal display device, comprising:

a substrate;

a gate line disposed along a first direction on the substrate, the gate line including a storage electrode;

a gate insulating layer on the gate line;

a semiconductor layer on the gate insulating layer;

a pixel electrode of transparent conductive material including a drain electrode portion, the drain electrode portion overlapping the semiconductor layer and the pixel electrode overlapping the gate line, respectively;

a source electrode of transparent conductive material spaced apart from the drain electrode portion;

a passivation layer including a first contact hole and an open portion, the first contact hole exposing the source electrode and the open portion exposing the pixel electrode, respectively; and

a data line disposed along a second direction on the passivation layer, the data line connected to the source electrode through the first contact hole and crossing the gate line.

2. The array substrate according to claim 1, wherein the semiconductor layer includes an active layer of amorphous silicon, an ohmic contact layer of doped amorphous silicon and a metal layer of titanium or chromium, and a portion of the active layer between the source electrode and the drain electrode portion is exposed.

3. The array substrate according to claim 1, further comprising a gate link and a gate pad at an end portion of the gate line,

the gate link being made of the same material as the data line and overlapping the gate line and the gate pad,

the gate line being connected to the gate link through a second contact hole in the gate insulating layer and the passivation layer, and

the gate pad being made of the same material as the pixel electrode and connected to the gate link through a third contact hole in the passivation layer.

4. The array substrate according to claim 3, wherein the gate link is wider than the gate pad.

5. The array substrate according to claim 1, further comprising a data pad at an end portion of the data line, the data pad overlapping the data line and being made of the same material as the pixel electrode and connected to the data line through a fourth contact hole.

6. The array substrate according to claim 5, wherein the overlapped data line is wider than the data pad.

7. The array substrate according to claim 1, said pixel electrode overlapping the gate line.

8. The array substrate according to claim 1, wherein the first contact hole is disposed under the data line.

9. The array substrate according to claim 1, wherein the transparent material is indium tin oxide.

10. The array substrate according to claim 1, wherein the passivation layer is made of acrylate resin.

11. A fabricating method of an array substrate of a liquid crystal display device, comprising:

forming a gate line disposed along a first direction on a substrate, the gate line including a storage electrode;

forming a gate insulating layer on the gate line;

forming a semiconductor layer on the gate insulating layer;

forming a source electrode and a pixel electrode of transparent conductive material, the pixel electrode including a drain electrode portion, the source electrode spaced apart from the drain electrode portion, the drain electrode portion overlapping the semiconductor layer and the pixel electrode overlapping the gate line, respectively;

forming a passivation layer including a first contact hole and an open portion, the first contact hole exposing the source electrode and the open portion exposing the pixel electrode, respectively; and

forming a data line disposed along a second direction on the passivation layer, the data line connected to the source electrode through the first contact hole and crossing the gate line.