DISPLAY DEVICE AND REPAIR METHOD THEREOF

• US 20150187798A1
• Filed: 06/02/2014
• Published: 07/02/2015
• Est. Priority Date: 12/30/2013
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Seong Young, KIM, Bo Yeong, PARK, Hyung Jun, YOO, Dong-Hyun
• Application Number:
  US14/293,585
• Publication Number:
  US 20150187798A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 27/1259 Multistep manufacturing methods
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 71/70 Testing, e.g. accelerated lifetime tests

Abstract

A display device includes: a substrate; a gate electrode on the substrate; a first electrode separated from the gate electrode; a gate insulating layer on the gate electrode and the first electrode; a semiconductor on the gate electrode; a source electrode and a drain electrode on the semiconductor and separated from each other; a passivation layer on the source electrode and the drain electrode; a first contact hole defined in the passivation layer and exposing the drain electrode; a second contact hole defined in the passivation layer and exposing the first electrode; a pixel electrode on the passivation layer and connected to the drain electrode through the first contact hole; and a second electrode on the passivation layer and connected to the first electrode through the second contact hole. The first electrode overlaps the drain electrode.

Claims

1. A display device comprising:

a substrate;

a gate electrode on the substrate;

a first electrode separated from the gate electrode;

a gate insulating layer on the gate electrode and the first electrode;

a semiconductor on the gate electrode;

a source electrode and a drain electrode on the semiconductor and separated from each other;

a passivation layer on the source electrode and the drain electrode;

a first contact hole defined in the passivation layer and exposing the drain electrode;

a second contact hole defined in the passivation layer and exposing the first electrode;

a pixel electrode on the passivation layer and connected to the drain electrode through the first contact hole; and

a second electrode on the passivation layer and connected to the first electrode through the second contact hole,

wherein the first electrode overlaps the drain electrode.

2. The display device of claim 1, wherein the first electrode comprises:

a first end portion overlapping the second electrode;

a second end portion opposite to the first end portion and overlapping the drain electrode; and

a connection member connecting the first end portion and the second end portion to each other.

3. The display device of claim 2, wherein the drain electrode comprises:

a first portion overlapping the gate electrode;

a second portion overlapping the pixel electrode; and

a third portion overlapping the second end portion of the first electrode.

4. The display device of claim 1, wherein

the first electrode is in the same layer as the gate electrode.

5. The display device of claim 4, wherein

the second electrode is in the same layer as the pixel electrode.

6. The display device of claim 1, further comprising a storage electrode line on the passivation layer,

wherein the second electrode is connected to the storage electrode line.

7. The display device of claim 6, further comprising a gate line and a data line on the substrate,

wherein

the gate electrode is connected to the gate line, and

the source electrode is connected to the data line.

8. The display device of claim 7, wherein

the storage electrode line extends in a direction parallel to a direction in which the data line extends.

9. The display device of claim 8, wherein

the storage electrode line overlaps the data line.

10. The display device of claim 9, wherein the first electrode comprises:

a first end portion overlapping the second electrode;

a second end portion opposite to the first end portion and overlapping the drain electrode; and

a connection member connecting the first end portion and the second end portion to each other,

wherein the connection member extends in a direction parallel to a direction in which the storage electrode line extends.

11. A method of repairing a display device comprising:

short-circuiting a first electrode and a drain electrode of the display device,

wherein the display device comprises;

a substrate;

a gate electrode on the substrate;

the first electrode separated from the gate electrode;

a gate insulating layer on the gate electrode and the first electrode;

a semiconductor on the gate electrode;

a source electrode and the drain electrode on the semiconductor and separated from each other;

a passivation layer on the source electrode and the drain electrode;

a first contact hole defined in the passivation layer and exposing the drain electrode;

a second contact hole defined in the passivation layer and exposing the first electrode;

a pixel electrode on the passivation layer and connected to the drain electrode through the first contact hole; and

a second electrode on the passivation layer and connected to the first electrode through the second contact hole,

wherein the first electrode overlaps the drain electrode.

12. The method of claim 11, wherein the first electrode comprises:

a first end portion overlapping the second electrode;

a second end portion opposite to the first end portion and overlapping the drain electrode; and

a connection member connecting the first end portion and the second end portion to each other,

wherein the short-circuiting the first electrode and the drain electrode of the display device comprises irradiating a laser to the second end portion of the first electrode.

13. The method of claim 12, wherein the drain electrode comprises:

a first portion overlapping the gate electrode;

a second portion overlapping the pixel electrode; and

a third portion overlapping the second end portion of the first electrode,

wherein the short-circuiting the first electrode and the drain electrode of the display device comprises irradiating a laser to the third portion of the drain electrode.

14. The method of claim 11, wherein

the first electrode is in the same layer as the gate electrode.

15. The method of claim 14, wherein

the second electrode is in the same layer as the pixel electrode.

16. The method of claim 11, further comprising a storage electrode line on the passivation layer,

wherein the second electrode is connected to the storage electrode line.

17. The method of claim 16, wherein the display device further comprises a gate line and a data line on the substrate,

wherein

the gate electrode is connected to the gate line, and

the source electrode is connected to the data line.

18. The method of claim 17, wherein

the storage electrode line extends in a direction parallel to a direction in which the data line extends.

19. The method of claim 18, wherein

the storage electrode line overlaps the data line.

20. The method of claim 19, wherein the first electrode comprises:

a first end portion overlapping the second electrode;

a second end portion opposite to the first end portion and overlapping the drain electrode; and

a connection member connecting the first end portion and the second end portion,

wherein the connection member extends in a direction parallel to a direction in which the storage electrode line extends.