THIN FILM TRANSISTOR SUBSTRATE, LIQUID CRYSTAL DISPLAY HAVING THE SAME, AND METHOD OF MANUFACTURING THE SAME

• US 20090180044A1
• Filed: 11/26/2008
• Published: 07/16/2009
• Est. Priority Date: 01/11/2008
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Bo-Sung, Shin, Jung-Han, Choi, Tae-Young, KIM, Young-Min, Ahn, Bo-Kyoung
• Application Number:
  US12/324,172
• Publication Number:
  US 20090180044A1
• Time in Patent Office: Days
• US Class Current: 349/43
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: H10K 10/466 Lateral bottom-gate IGFETs comprising only a single gate
• CPC Class Codes: H10K 10/88 Passivation; Containers; Encapsulations

Abstract

A thin film transistor substrate includes a gate line arranged on a substrate, a data line arranged to cross the gate line, an organic thin film transistor including a gate electrode connected to the gate line, a source electrode connected to the data line, a drain electrode spaced apart from the source electrode, and an organic semiconductor layer forming a channel between the source electrode and the drain electrode, a pixel electrode connected to the drain electrode, and an organic passivation layer to protect the organic semiconductor layer and to receive a white light and transmit a colored light.

Claims

1. A thin film transistor substrate, comprising:

a gate line arranged on a substrate;

a data line arranged to cross the gate line;

an organic thin film transistor comprising a gate electrode connected to the gate line, a source electrode connected to the data line, a drain electrode spaced apart from the source electrode, and an organic semiconductor layer forming a channel between the source electrode and the drain electrode;

a pixel electrode connected to the drain electrode; and

an organic passivation layer to protect the organic semiconductor layer and to receive a light and transmit a colored light.

2. The thin film transistor substrate of claim 1, wherein the organic passivation layer overlaps with the pixel electrode.

3. The thin film transistor substrate of claim 1, further comprising a bank insulating layer having two portions with different heights from each other, the organic semiconductor layer and the organic passivation layer being arranged between the two portions.

4. The thin film transistor substrate of claim 3, wherein the two portions of the bank insulating layer are spaced apart from each other.

5. The thin film transistor substrate of claim 3, wherein the bank insulating layer comprises a first hole, in which the organic semiconductor layer is filled, and a second hole, in which the organic passivation layer is filled.

6. The thin film transistor substrate of claim 1, wherein the organic passivation layer transmits red, green, or blue light.

7. The thin film transistor substrate of claim 1, wherein the organic passivation layer comprises a pigment or dye.

8. The thin film transistor substrate of claim 7, wherein the organic passivation layer further comprises a binder, a monomer, an initiator, an additive, and a solvent.

9. The thin film transistor substrate of claim 8, wherein the organic passivation layer includes a composition comprising 5 to 10 wt % of the pigment or dye, 5 to 10 wt % of the binder, 5 to 10 wt % of the monomer, less than 1 wt % of the initiator, less than 1 wt % of the additive, and 70 to 85 wt % of the solvent.

10. The thin film transistor substrate of claim 5, wherein the first hole is included within the second hole.

15. The liquid crystal display of claim 11, further comprising a backlight unit to provide the light, wherein the organic passivation layer receives the light from the backlight unit and transmits red, green, or blue light.

11. A liquid crystal display, comprising:

a thin film transistor substrate;

an opposite substrate; and

a liquid crystal layer interposed between the thin film transistor substrate and the opposite substrate,

wherein the thin film transistor substrate comprises an organic thin film transistor comprising a gate electrode connected to a gate line, a source electrode connected to a data line, a drain electrode spaced apart from the source electrode, and an organic semiconductor layer forming a channel between the source electrode and the drain electrode, a pixel electrode connected to the drain electrode, and an organic passivation layer to protect the organic semiconductor layer and to receive a light and transmit a colored light.

12. The liquid crystal display of claim 11, wherein the organic passivation layer overlaps with the pixel electrode.

13. The liquid crystal display of claim 11, wherein the opposite substrate comprises a common electrode.

14. The liquid crystal display of claim 11, further comprising a bank insulating layer having two portions having different heights from each other, the organic semiconductor layer and the organic passivation layer being arranged between the two portions.

16. The liquid crystal display of claim 11, wherein the organic passivation layer comprises a pigment or dye.

17. The liquid crystal display of claim 16, wherein the organic passivation layer further comprises a binder, a monomer, an initiator, an additive, and a solvent.

18. The liquid crystal display of claim 14, wherein the bank insulating layer comprises a first hole, in which the organic semiconductor layer is filled, and a second hole, in which the organic passivation layer is filled, and

wherein the first hole is included within the second hole.

19. A method of manufacturing a thin film transistor substrate, the method comprising:

forming a first metal pattern including a gate line and a gate electrode on a substrate;

forming a second metal pattern comprising a data line, a source electrode, and a drain electrode spaced apart from the source electrode;

forming a bank insulating layer on the second metal pattern, the bank insulating layer comprising a first hole and a second hole;

forming an organic semiconductor layer in the first hole; and

forming an organic passivation layer in the second hole, the organic passivation layer to receive a light and transmit a colored light.

20. The method of claim 19, wherein the organic passivation layer comprises a pigment or dye.