Liquid crystal display and a fabricating method thereof

• US 20030214621A1
• Filed: 10/18/2002
• Published: 11/20/2003
• Est. Priority Date: 05/17/2002
• 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, Lee, Hyun Kyu
• Granted Patent: US 7,369,207 B2
• Time in Patent Office: Days
• US Class Current: 349/155
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• 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 2201/121 common or background

Abstract

A liquid crystal display device including a substrate, a thin film transistor provided at an area adjacent to an intersection of a gate line and a data line on the substrate, a protective layer provided on the substrate to cover the thin film transistor, a pixel electrode provided on the protective layer and connected through the protective layer to the thin film transistor, a first hole in a surface of the pixel electrode and positioned above an adjacent gate line and a spacer positioned within the first hole. A method of fabricating a liquid crystal display device includes the steps of forming a thin film transistor at an area adjacent an intersection between a gate line and a data line on a substrate, forming a protective layer covering the thin film transistor, forming a pixel electrode provided on the protective layer and passing through the protective layer to be electrically connected to the thin film transistor, defining a hole in a surface of the pixel electrode by patterning the pixel electrode on the protective layer above an adjacent gate line and depositing a spacer into the first hole using an ink-jet device.

Claims

1. A liquid crystal display device, comprising:

a substrate;

a thin film transistor provided at an area adjacent to an intersection of a gate line and a data line on the substrate;

a protective layer provided on the substrate to cover the thin film transistor;

a pixel electrode provided on the protective layer and connected through the protective layer to the thin film transistor;

a first hole in a surface of the pixel electrode and positioned above an adjacent gate line; and

a spacer positioned within the first hole.

2. The liquid crystal display device of claim 1, wherein the first hole overlaps the adjacent gate line.

3. The liquid crystal display device of claim 1, wherein a second hole in the protective layer corresponds to the first hole and the spacer is positioned within both the first and second hole.

4. The liquid crystal display device of claim 3, wherein the first hole and the second hole in the protective layer overlap the adjacent gate line.

5. The liquid crystal display device of claim 4, wherein the pixel electrode connects to a capacitor electrode within the second hole.

6. A liquid crystal display device, comprising:

a substrate;

a thin film transistor provided at an area adjacent to an intersection of a gate line and a data line on the substrate;

a protective layer provided on the substrate to cover the thin film transistor;

a hole within the protective layer positioned above an adjacent gate line;

a pixel electrode provided on the protective layer and into the hole, wherein the pixel electrode is connected through the protective layer to the thin film transistor; and

a spacer positioned within the hole.

7. The liquid crystal display device of claim 6, wherein the hole within the protective layer overlaps the adjacent gate line.

8. The liquid crystal display device of claim 6, wherein the pixel electrode connects to a capacitor electrode within the second hole, wherein the capacitor electrode is directly above the adjacent gate line.

9. A liquid crystal display device, comprising:

a black matrix formed on a substrate to define a pixel area;

a color filter provided at the pixel area;

a common electrode provided on the color filter;

a hole within the common electrode overlapping the black matrix; and

a spacer positioned within the hole.

10. The liquid crystal display device of claim 9, further comprising:

an alignment film coated on the common electrode and the spacer.

11. A liquid crystal display device, comprising:

a black matrix formed on a substrate to define a pixel areas;

color filters provided in the pixel areas;

a hole between color filters overlapping the black matrix;

a common electrode provided on the color filters and into the hole; and

a spacer positioned within the hole on the common electrode.

12. The liquid crystal display device of claim 11, further comprising:

an alignment film coated on the common electrode and the spacer.

13. A method of fabricating a liquid crystal display device, comprising the steps of:

forming a thin film transistor at an area adjacent an intersection between a gate line and a data line on a substrate;

forming a protective layer covering the thin film transistor;

forming a pixel electrode provided on the protective layer and passing through the protective layer to be electrically connected to the thin film transistor;

defining a hole in a surface of the pixel electrode by patterning the pixel electrode on the protective layer above an adjacent gate line; and

depositing a spacer into the first hole using an ink-jet device.

14. The method of claim 13, wherein the step of defining a hole includes patterning a second hole in the protective layer corresponding to the first hole in the pixel electrode and the step of jetting a spacer into the first hole also includes jetting the spacer into the second hole of the protective layer.

15. The method of claim 13, wherein the first hole within the pixel electrode overlaps the adjacent gate line.

16. The method of claim 14, wherein both the first and second hole overlaps the adjacent gate line.

17. A method of fabricating a liquid crystal display device, comprising the steps of:

forming a black matrix to define a pixel area;

forming a color filter at the pixel area;

forming a common electrode on the color filter;

defining a hole by patterning the common electrode at an area overlapping with the black matrix; and

depositing a spacer into the hole using an ink-jet device.

18. A method of fabricating a liquid crystal display device, comprising the steps of:

forming a black matrix to define a pixel areas;

forming color filters at the pixel areas;

defining a hole by patterning the color filter areas at an area overlapping with the black matrix;

forming a common electrode on the color filters and into the hole; and

depositing a spacer into the hole onto the common electrode within the hole using an ink-jet device.