Display device having a black matrix overlapping a gate control signal line formed on substrate

• US 7,081,939 B2
• Filed: 12/01/2004
• Issued: 07/25/2006
• Est. Priority Date: 10/31/2000
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Dong-Gyu
• Primary Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US10/999,986
• Publication Number:
  US 20050157221A1
• Time in Patent Office: 601 Days
• Field of Search: 349/43, 349149-152, 349/110, 349/111, 257/59, 257/72
• US Class Current: 349/152
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1244 for preventing breakage, peeling or short circuiting
• CPC Class Codes: H01L 27/1288 employing particular masking sequences or specially adapted masks, e.g. half-tone mask

Abstract

A control signal unit includes a substrate, a signal line formed on the substrate, and an insulating layer covering the signal line. A contact hole exposes the signal line with a predetermined width. The contact hole has a lateral side bordering on the signal line. The lateral side of the contact hole is longer than the width of the contact hole. A subsidiary signal pad is connected to the signal line through the contact hole.

Claims

1. A display device, comprising:

a first substrate;

a first conductive pattern formed on the first substrate and comprising a gate line transmitting a gate signal and a gate control signal line transmitting a gate control signal;

a second conductive pattern formed on the first substrate and comprising a data line interesting the gate line and transmitting a data signal;

a gate driving unit receiving the gate control signal via the gate control signal line and generating the gate signal;

a data driving unit generating the data signal; and

a black matrix overlapping the gate control signal line.

2. The display device of claim 1, further comprising a second substrate facing the first substrate, wherein the black matrix is formed on the second substrate.

3. The display device of claim 2, further comprising a liquid crystal layer formed between the first and the second substrate.

4. The display device of claim 1, further comprising a signal transmission film attached to the first substrate, wherein the data driving unit is mounted on the signal transmission film.

5. The display device of claim 4, wherein the signal transmission film transmits the gate control signal and the data signal to the gate control signal line and the data line, respectively.

6. The display device of claim 1, further comprising:

a thin film transistor formed on the first substrate and connected to the gate line and the data line; and

a third conductive pattern comprising a pixel electrode connected to the thin film transistor and a pad formed on an end of the gate control signal line.

7. The display device of claim 6, further comprising a first insulating film formed on the first conductive pattern and having an opening exposing the end of the gate control signal line.

8. The display device of claim 7, wherein the first conductive pattern has a multi-layered structure comprising a lower layer containing Cr and an upper layer containing Al.

9. The display device of claim 8, wherein a portion of the upper layer of the first conductive pattern is removed at the end portion of the gate control signal line, and the pad is formed directed on the lower layer of the first conductive pattern.