Semiconductor device and manufacturing method thereof

• US 7,329,985 B2
• Filed: 06/30/2006
• Issued: 02/12/2008
• Est. Priority Date: 08/09/2002
• Status: Expired due to Term

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Goto, Yuugo, Tanada, Yoshifumi, Yamazaki, Shunpei
• Primary Examiner(s): Patel; Nimeshkumar D.
• Assistant Examiner(s): Raabe; Christopher M.
• Application Number:
  US11/479,802
• Publication Number:
  US 20060250073A1
• Time in Patent Office: 592 Days
• Field of Search: 313498-512, 345/45, 345/46, 345/47, 345/36, 345/76, 315/169.3
• US Class Current: 313/506
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

A self-light emitting display device with top-emission usually has no film that is capable of light shielding. Therefore, it is necessary to form a light-shielding layer additionally with, which leads the number of processes to increase.

In the present invention, plural films selected from a first coloring layer 161, a second coloring layer 162, and a third coloring layer 163 formed on an opposing substrate are laminated to form a light-shielding portion without using a light-shielding mask.

Claims

1. An electroluminescent display device comprising:

a first substrate;

a first light emitting element supported by the first substrate;

a second light emitting element supported by the first substrate;

a second substrate;

a first coloring layer for filtering emitted light from the first light emitting element, supported by the second substrate and overlapped with the first light emitting element; and

a second coloring layer for filtering emitted tight from the second light emitting element, supported by the second substrate and overlapped with the second light emitting element,

wherein the first substrate is opposite the second substrate, and

wherein a first portion between the first and second light emitting elements is overlapped with a second portion where the first coloring layer is overlapped with the second coloring layer.

2. An electroluminescent display device according to claim 1, wherein a light emitting portion of a dummy pixel is overlapped with the second portion.

3. An electroluminescent display device according to claim 1, wherein a current monitoring pixel is overlapped with the second portion.

4. An electroluminescent display device according to claim 1, wherein the first and second coloring layers are covered with a planarized protective film.

5. An electroluminescent display device according to claim 1, wherein the electroluminescent display device is a top-emission type.

6. An electroluminescent display device according to claim 1, wherein the electroluminescent display device is an active matrix type.

7. An electroluminescent display device comprising:

a first substrate;

a first light emitting element supported by the first substrate and including a first light emitting layer formed between a first electrode and a second electrode;

a second light emitting element supported by the first substrate and including a second light emitting layer formed between a third electrode and a forth electrode;

a second substrate;

a first coloring layer for filtering emitted light from the first light emitting element, supported by the second substrate and overlapped with the first light emitting element; and

a second coloring layer for filtering emitted light from the second light emitting element, supported by the second substrate and overlapped with the second light emitting element,

wherein the first substrate is opposite the second substrate, and

wherein a first portion between the first and second light emitting elements is overlapped with a second portion where the first coloring layer is overlapped with the second coloring layer.

8. An electroluminescent display device according to claim 7, wherein a light emitting portion of a dummy pixel is overlapped with the second portion.

9. An electroluminescent display device according to claim 7, wherein a current monitoring pixel is overlapped with the second portion.

10. An electroluminescent display device according to claim 7, wherein the first and second coloring layers are covered with a planarized protective film.

11. An electroluminescent display device according to claim 7, wherein each of end portions of the first and third electrodes is covered by an insulator overlapped with the first and second portions.

12. An electroluminescent display device according to claim 7, wherein the first and second light emitting layers are connected with each other.

13. An electroluminescent display device according to claim 7, wherein the second and fourth electrodes are connected with each other.

14. An electroluminescent display device according to claim 7, wherein the electroluminescent display device is a top-emission type.

15. An electroluminescent display device according to claim 7, wherein the electroluminescent display device is an active matrix type.

16. An electroluminescent display device comprising:

a first substrate;

a thin film transistor supported by the first substrate;

an insulating film formed over the thin film transistor and supported by the first substrate;

a first light emitting element formed over the insulating film and supported by the first substrate;

a second light emitting element formed over the insulating film and supported by the first substrate;

a second substrate;

a first coloring layer for filtering emitted light from the first light emitting element, supported by the second substrate and overlapped with the first light emitting element; and

a second coloring layer for filtering emitted light from the second light emitting element, supported by the second substrate and overlapped with the second light emitting element,

wherein the first substrate is opposite the second substrate, and

wherein a first portion between the first and second light emitting elements is overlapped with a second portion where the first coloring layer is overlapped with the second coloring layer.

17. An electroluminescent display device according to claim 16, wherein a light emitting portion of a dummy pixel is overlapped with the second portion.

18. An electroluminescent display device according to claim 16, wherein a current monitoring pixel is overlapped with the second portion.

19. An electroluminescent display device according to claim 16, wherein the first and second coloring layers are covered with a planarized protective film.

20. An electroluminescent display device according to claim 16, wherein the insulating film is planarized.

21. An electroluminescent display device according to claim 16, wherein the electroluminescent display device is a top-emission type.

22. An electroluminescent display device according to claim 16, wherein the electroluminescent display device is an active matrix type.

23. An electroluminescent display device comprising:

a first substrate;

a thin film transistor supported by the first substrate;

an insulating film formed over the thin film transistor and supported by the first substrate;

a first light emitting element formed over the insulating film, supported by the first substrate, and including a first light emitting layer formed between a first electrode and a second electrode;

a second light emitting element formed over the insulating film, supported by the first substrate, and including a second light emitting layer formed between a third electrode and a forth electrode;

a second substrate;

a first coloring layer for filtering emitted light from the first light emitting element, supported by the second substrate and overlapped with the first light emitting element; and

a second coloring layer for filtering emitted light from the second light emitting element, supported by the second substrate and overlapped with the second light emitting element,

wherein the first substrate is opposite the second substrate, and

wherein a first portion between the first and second light emitting elements is overlapped with a second portion where the first coloring layer is overlapped with the second coloring layer.

24. An electroluminescent display device according to claim 23, wherein a light emitting portion of a dummy pixel is overlapped with the second portion.

25. An electroluminescent display device according to claim 23, wherein a current monitoring pixel is overlapped with the second portion.

26. An electroluminescent display device according to claim 23, wherein the first and second coloring layers are covered with a planarized protective film.

27. An electroluminescent display device according to claim 23, wherein each of end portions of the first and third electrodes is covered by an insulator overlapped with overlapped with the first and second portions.

28. An electroluminescent display device according to claim 23, wherein the first and second light emitting layers are connected with each other.

29. An electroluminescent display device according to claim 23, wherein the second and fourth electrodes are connected with each other.

30. An electroluminescent display device according to claim 23, wherein the insulating film is planarized.

31. An electroluminescent display device according to claim 23, wherein the electroluminescent display device is a top-emission type.

32. An electroluminescent display device according to claim 23, wherein the electroluminescent display device is an active matrix type.

33. An electroluminescent display device comprising:

a first substrate;

a first pixel having a first light emitting element, supported by the first substrate;

a second pixel having a second light emitting element, supported by the first substrate;

a dummy pixel having a third light emitting element, supported by the first substrate;

a second substrate;

a first coloring layer for filtering emitted light from the first light emitting element, supported by the second substrate and overlapped with the first light emitting element; and

a second coloring layer for filtering emitted light from the second light emitting element, supported by the second substrate and overlapped with the second light emitting element,

wherein the first substrate is opposite the second substrate,

wherein a first portion between the first and second pixels is overlapped with a second portion where the first coloring layer is overlapped with the second coloring layer, and

wherein the dummy pixel is overlapped with a third portion where the first and second coloring layer is overlapped with each other for shielding a light emitting portion of the dummy pixel.

34. An electroluminescent display device according to claim 33, wherein a current monitoring pixel is overlapped with the second portion.

35. An electroluminescent display device according to claim 33, wherein the first and second coloring layers are covered with a planarized protective film.

36. An electroluminescent display device according to claim 33, wherein each of the first, second, and dummy pixels has a thin film transistor.

37. An electroluminescent display device according to claim 33, wherein the electroluminescent display device is a top-emission type.

38. An electroluminescent display device according to claim 33, wherein the electroluminescent display device is an active matrix type.