Liquid crystal display device and method of fabricating the same

• US 20040257509A1
• Filed: 04/28/2004
• Published: 12/23/2004
• Est. Priority Date: 06/20/2003
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Nam, Seung Hee, Oh, Jae Young, Lee, Kyoung Mook
• Granted Patent: US 7,733,456 B2
• Time in Patent Office: Days
• US Class Current: 349/139
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13458 Terminal pads
• 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: H01L 2224/05553 being rectangular
• CPC Class Codes: H01L 24/06 of a plurality of bonding areas
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/12044 OLED
• CPC Class Codes: H01L 2924/14 Integrated circuits

Abstract

A liquid crystal display device includes a plurality of signal lines on a substrate, a plurality of pad electrodes on the substrate, each one of the plurality of pad electrodes connected to one of the plurality of signal lines, at least one insulating film on the plurality of pad electrodes, the at least one insulating film having a plurality of contact holes to expose portions of the pad electrodes, and a conductive film electrically connected to each of the plurality of pad electrodes through the contact holes.

Claims

1. A liquid crystal display device, comprising:

a plurality of signal lines on a substrate;

a plurality of pad electrodes on the substrate, each one of the plurality of pad electrodes connected to one of the plurality of signal lines;

at least one insulating film on the plurality of pad electrodes, the at least one insulating film having a plurality of contact holes to expose portions of the pad electrodes; and

a conductive film electrically connected to each of the plurality of pad electrodes through the contact holes.

2. The device according to claim 1, wherein the plurality of signal lines include at least one of:

a data line to which data signals are supplied via any one of the pad electrodes;

a gate line to which gate signals are supplied via any one of the pad electrodes; and

a common line to which a reference voltage signal is applied via any one of the pad electrodes.

3. The device according to claim 2, further comprising a reflective electrode formed at an intersection area of the data line and the gate line.

4. The device according to claim 2, further comprising:

a pixel electrode formed at an intersection area of the data-line and the gate line; and

a common electrode formed in parallel to the pixel electrode at the intersection area,

wherein the pixel electrode receives the data signals and the common electrode receives the reference voltage signal to form a horizontal electric field parallel to the substrate.

5. The device according to claim 2, further comprising:

a pixel electrode formed at an intersection area of the data line and the gate line; and

a transparent conductive film having a pattern similar to a pattern of the at least one insulating film.

6. The device according to claim 1, wherein each of the plurality of contact holes is formed to have a shape including one of a circle, an oval, and a polygon.

7. The device according to claim 1, wherein each of the plurality of contact holes has a first U-shaped contact hole and a second U-shaped contact hole engaged with the first U-shaped contact hole along a widthwise direction of the pad electrodes.

8. The device according to claim 1, wherein each of the plurality of contact holes has a first C-shaped contact hole and a second C-shaped contact hole engaged with the first C-shaped contact hole along a lengthwise direction of the pad electrodes.

9. The device according to claim 1, wherein each of the plurality of contact holes includes a continuous zigzag configuration along a lengthwise direction of the pad electrodes.

10. The device according to claim 1, wherein each of the plurality of contact holes have a width of about 5 μ

m to about 50 μ

m.

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

forming a plurality of pad electrodes connected to a plurality of signal lines on a substrate;

forming at least one insulating film having a plurality of contact holes to expose portions of the plurality of pad electrodes; and

connecting the exposed portions of the pad electrodes directly with a conductive film.

12. The method according to claim 11, further comprising:

forming a data line to which data signals are supplied via any one of the pad electrodes; and

forming a gate line to which gate signals are supplied via any one of the pad electrodes.

13. The method according to claim 12, further comprising forming a reflective electrode at an intersection area of the data line and the gate line.

14. The method according to claim 11, further comprising:

forming a common line to which a reference voltage signal is applied via any one of the pad electrodes and a common electrode connected to the common line; and

forming a pixel electrode receiving the data signals,

wherein the common electrode and the pixel electrode form a horizontal electric field parallel to the substrate.

15. The method according to claim 12, further comprising:

forming a pixel electrode at an intersection area of the data line and the gate line;

forming a transparent conductive film having a pattern similar to a pattern of the at least one insulating film.

16. The method according to claim 11, wherein each of the plurality of contact holes are formed to have a shaped including one of a circle, an oval, and a polygon.

17. The method according to claim 11, wherein each of the plurality of contact holes includes a first U-shaped contact hole and a second U-shaped contact hole engaged with the first U-shaped contact hole along a widthwise direction of the pad electrodes.

18. The method according to claim 11, wherein each of the plurality of contact holes includes a first C-shaped contact hole and a second C-shaped contact hole engaged with the first C-shaped contact hole along a lengthwise direction of the pad electrodes.

19. The method according to claim 11, wherein each of the plurality of contact holes includes a continuous zigzag configuration along a lengthwise direction of the pad electrodes.

20. The method according to claim 11, wherein each of the plurality of contact holes have a width of about 5 μ

m to about 50 μ

m.