Display device

• US 20050264740A1
• Filed: 07/25/2005
• Published: 12/01/2005
• Est. Priority Date: 03/26/1997
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei
• Granted Patent: US 7,190,428 B2
• Time in Patent Office: Days
• US Class Current: 349/138
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence

Abstract

There is disclosed a structure for radiating heat generated by TFTs in a liquid crystal panel. A DLC film 125 is provided on a resin interlayer film 123 disposed on the TFTs 105, 109, and 113. The DLC film 125 can be easily formed on the resin film, and has high heat conductivity, so that the film can be made to function as a heat radiating layer.

Claims

1. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor wherein the first insulating film has a first opening;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor through the first opening of the first insulating film;

a second insulating film formed over the electrode wherein the second insulating film has a second opening;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a third opening;

a pixel electrode contacting the electrode in the second opening of the second insulating film; and

a light emitting layer formed over the pixel electrode,

wherein the second opening and the third opening overlap the first opening.

2. The display device according to claim 1, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

3. The display device according to claim 1, wherein the thin film transistor is a top-gate type thin film transistor.

4. The display device according to claim 1, further comprising:

a fourth insulating film comprising an organic resin between the third insulating film and the light emitting layer.

5. The display device according to claim 1, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

6. The display device according to claim 1, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.

7. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor wherein the first insulating film has a first opening and comprises silicon oxide;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor through the first opening of the first insulating film;

a second insulating film formed over the electrode wherein the second insulating film has a second opening and comprises silicon nitride;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a third opening;

a pixel electrode contacting the electrode in the second opening of the second insulating film; and

a light emitting layer formed over the pixel electrode,

wherein the second opening and the third opening overlap the first opening.

8. The display device according to claim 7, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

9. The display device according to claim 7, wherein the thin film transistor is a top-gate type thin film transistor.

10. The display device according to claim 7, further comprising:

a fourth insulating film comprising an organic resin between the third insulating film and the light emitting layer.

11. The display device according to claim 7, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

12. The display device according to claim 7, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.

13. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor wherein the first insulating film has a first opening;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor through the first opening of the first insulating film;

a second insulating film formed over the electrode wherein the second insulating film has a second opening and is in contact with both sides of the electrode;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a third opening;

a pixel electrode contacting the electrode in the second opening of the second insulating film; and

a light emitting layer formed over the pixel electrode,

wherein the second opening and the third opening overlap the first opening.

14. The display device according to claim 13, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

15. The display device according to claim 13, wherein the thin film transistor is a top-gate type thin film transistor.

16. The display device according to claim 13, further comprising:

a fourth insulating film comprising an organic resin between the third insulating film and the light emitting layer.

17. The display device according to claim 13, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

18. The display device according to claim 13, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.

19. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor wherein the first insulating film has a first opening and comprises silicon oxide;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor through the first opening of the first insulating film;

a second insulating film formed over the electrode wherein the second insulating film has a second opening, comprises silicon nitride and is in contact with both sides of the electrode;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a third opening;

a pixel electrode contacting the electrode in the second opening of the second insulating film; and

a light emitting layer formed over the pixel electrode,

wherein the second opening and the third opening overlap the first opening.

20. The display device according to claim 19, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

21. The display device according to claim 19, wherein the thin film transistor is a top-gate type thin film transistor.

22. The display device according to claim 19, further comprising:

a fourth insulating film comprising an organic resin between the third insulating film and the light emitting layer.

23. The display device according to claim 19, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

24. The display device according to claim 19, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.

25. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor;

a second insulating film formed over the electrode wherein the second insulating film has a first opening;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a second opening;

a pixel electrode formed over the third insulating film wherein the pixel electrode contacts the electrode; and

a light emitting layer formed over the pixel electrode,

wherein a width of the first opening is longer than a width of the second opening.

26. The display device according to claim 25, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

27. The display device according to claim 25, wherein the thin film transistor is a top-gate type thin film transistor.

28. The display device according to claim 25, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

29. The display device according to claim 25, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.

30. A display device comprising:

a substrate;

a thin film transistor formed over the substrate;

a first insulating film formed over the thin film transistor wherein the first insulating film comprises silicon oxide;

an electrode comprising three layers wherein the electrode contacts one of a source region or a drain region of the thin film transistor;

a second insulating film formed over the electrode wherein the second insulating film has a first opening;

a third insulating film comprising an organic resin and covering the second insulating film wherein the third insulating film has a second opening;

a pixel electrode formed over the third insulating film wherein the pixel electrode contacts the electrode; and

a light emitting layer formed over the pixel electrode,

wherein a width of the first opening is longer than a width of the second opening.

31. The display device according to claim 30, wherein the organic resin is selected from the group consisting of polyimide, polyimideamide, polyamide, acryl and epoxy.

32. The display device according to claim 30, wherein the thin film transistor is a top-gate type thin film transistor.

33. The display device according to claim 30, wherein the electrode comprises a titanium film, an aluminum film and a titanium film.

34. The display device according to claim 30, wherein the display device is incorporated into an electric apparatus selected from the group consisting of a portable information, a head mount display, a portable telephone, a video camera and a projector.