Light-emitting apparatus

• US 20050247938A1
• Filed: 06/28/2005
• Published: 11/10/2005
• Est. Priority Date: 12/27/2002
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Monoe, Shigeharu, Okamoto, Satoru, Yokoshima, Takashi
• Granted Patent: US 7,554,128 B2
• Time in Patent Office: Days
• US Class Current: 257/59
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• CPC Class Codes: H01L 29/41733 for thin film transistors with insulated gate
• CPC Class Codes: H01L 29/458 for thin film silicon, e.g. source or drain electrode
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks

Abstract

A light-emitting device, which has a structure that improves an opening ratio and light extraction efficiency, can solve a problem of an etching residue occurred during forming the device itself, and reduce deterioration due to poor coverage and short-circuiting to improve greatly the reliability, and a method for manufacturing the light-emitting device. In the light-emitting device having a structure that improves light extraction efficiency, a material used for forming a first electrode is Ti/TiN/Al (or Al—Ti)/Ti (or TiN).

Claims

1-6. -6. (canceled)

7. A cellular phone including a display device, the display device comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion; and

a second electrode formed on the organic compound layer.

8. A cellular phone including a display device according to claim 7, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

9. A cellular phone including a display device according to claim 7, wherein the organic compound layer comprises a light-emitting layer.

10. A cellular phone including a display device according to claim 7, wherein the insulator comprises a bank.

11. A cellular phone including a display device according to claim 7, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

12. A cellular phone including a display device according to claim 7, wherein the gate electrode is formed over the semiconductor layer.

13. A camera including a display device, the display device comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion; and

a second electrode formed on the organic compound layer.

14. A camera including a display device according to claim 13, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

15. A camera including a display device according to claim 13, wherein the organic compound layer comprises a light-emitting layer.

16. A camera including a display device according to claim 13, wherein the insulator comprises a bank.

17. A camera including a display device according to claim 13, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

18. A camera including a display device according to claim 13, wherein the gate electrode is formed over the semiconductor layer.

19. A camera including a display device according to claim 13, wherein the camera is at least one of a digital camera and a video camera.

20. A display device for a TV broadcasting, comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion; and

a second electrode formed on the organic compound layer.

21. A display device for a TV broadcasting according to claim 20, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

22. A display device for a TV broadcasting according to claim 20, wherein the organic compound layer comprises a light-emitting layer.

23. A display device for a TV broadcasting according to claim 20, wherein the insulator comprises a bank.

24. A display device for a TV broadcasting according to claim 20, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

25. A display device for a TV broadcasting according to claim 20, wherein the gate electrode is formed over the semiconductor layer.

26. A cellular phone including a display device, the display device comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion, wherein the side surface of the first portion comprises the third layer and the fourth layer; and

a second electrode formed on the organic compound layer.

27. A cellular phone including a display device according to claim 26, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

28. A cellular phone including a display device according to claim 26, wherein the organic compound layer comprises a light-emitting layer.

29. A cellular phone including a display device according to claim 26, wherein the insulator comprises a bank.

30. A cellular phone including a display device according to claim 26, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

31. A cellular phone including a display device according to claim 26, wherein the gate electrode is formed over the semiconductor layer.

32. A camera including a display device, the display device comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion, wherein the side surface of the first portion comprises the third layer and the fourth layer; and

a second electrode formed on the organic compound layer.

33. A camera including a display device according to claim 32, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

34. A camera including a display device according to claim 32, wherein the organic compound layer comprises a light-emitting layer.

35. A camera including a display device according to claim 32, wherein the insulator comprises a bank.

36. A camera including a display device according to claim 32, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

37. A camera including a display device according to claim 32, wherein the gate electrode is formed over the semiconductor layer.

38. A camera including a display device according to claim 32, wherein the camera is at least one of a digital camera and a video camera.

39. A display device for a TV broadcasting, comprising:

a semiconductor layer formed over a substrate;

a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebeween;

a first electrode electrically connected to the semiconductor layer, wherein the first electrode comprises a first portion and a second portion, wherein the first portion comprises a first layer, a second layer, a third layer, and a fourth layer, and wherein the second portion comprises the first layer and the second layer;

an insulator covering the first portion;

an organic compound layer formed on the second portion and on a side surface of the first portion, wherein the side surface of the first portion comprises the third layer and the fourth layer; and

a second electrode formed on the organic compound layer.

40. A display device for a TV broadcasting according to claim 39, wherein the first layer comprises titanium, the second layer comprises titanium nitride, the third layer comprises aluminum, and the fourth layer comprises titanium.

41. A display device for a TV broadcasting according to claim 39, wherein the organic compound layer comprises a light-emitting layer.

42. A display device for a TV broadcasting according to claim 39, wherein the insulator comprises a bank.

43. A display device for a TV broadcasting according to claim 39, wherein the first electrode is formed over an interlayer insulating film comprises an organic material.

44. A display device for a TV broadcasting according to claim 39, wherein the gate electrode is formed over the semiconductor layer.