Semiconductor device and manufacturing method thereof

• US 7,081,704 B2
• Filed: 08/07/2003
• Issued: 07/25/2006
• Est. Priority Date: 08/09/2002
• Status: Active Grant

• 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, Ashok
• Application Number:
  US10/636,869
• Publication Number:
  US 20040027055A1
• Time in Patent Office: 1,083 Days
• Field of Search: 313/483, 313498-506, 345/45, 345/46, 345/47, 315/169.3, 428/917
• US Class Current: 313/500
• 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 EL display device comprising:

at least a first coloring layer for a first color, and a second coloring layer for a second color,

a first pixel comprising a first pixel electrode,

a second pixel comprising a second pixel electrode,

a first light emitting layer adjacent to the first pixel electrode, and

a second light emitting layer adjacent to the second pixel electrode,

wherein the first color is different from the second color,

wherein the first pixel electrode is overlapped with the first coloring layer and the second pixel electrode is overlapped with the second coloring layer,

wherein a film comprising at least a laminate of a portion of the first coloring layer and a portion of the second coloring layer is overlapped with a region except a light emitting portion of the first and second pixels,

wherein emitted light from the first light emitting layer is filtered by the first coloring layer, and

wherein emitted light from the second light emitting layer is filtered by the second coloring layer.

4. An EL display device according to claim 1 further comprising a third coloring layer for a third color and a third pixel comprising a third pixel electrode,

wherein the third pixel electrode is overlapped with the third coloring layer,

wherein the third color is different from both of the first and second colors, and

wherein the film further comprises a portion of the third coloring layer, and the film is overlapped with a region except a light emitting portion of the first to third pixels.

9. An EL display device according to claim 1, wherein the region includes a light emitting portion of a dummy pixel.

12. An EL display device according to claim 1, wherein the first and second coloring layer are formed over an opposing substrate.

21. An EL display device according to claim 1, wherein the first and the second light emitting layers are connected with each other.

2. An EL display device comprising:

at least a first coloring layer for a first color, and a second coloring layer for a second color,

a first pixel comprising a first pixel electrode,

a second pixel comprising a second pixel electrode,

a source signal line,

a gate signal line,

a TFT,

a first light emitting layer adjacent to the first pixel electrode, and

a second light emitting layer adjacent to the second pixel electrode,

wherein the first color is different from the second color,

wherein the first pixel electrode is overlapped with the first coloring layer and the second pixel electrode is overlapped with the second coloring layer,

wherein a film comprising at least a laminate of a portion of the first coloring layer and a portion of second coloring layer is overlapped with at least the source signal line, the gate signal line, and the TFT,

wherein emitted light from the first light emitting layer is filtered by the first coloring layer, and

wherein emitted light from the second light emitting layer is filtered by the second coloring light.

5. An EL display device according to claim 2 further comprising a third coloring layer for a third color and a third pixel comprising a third pixel electrode,

wherein the third pixel electrode is overlapped with the third coloring layer, wherein the third color is different from both of the first and second colors, and

wherein the film further comprises a portion of the third coloring layer, and the film is overlapped with at least the source signal line, the gate signal line, and the TFT.

6. An EL display device according to claim 5, wherein the third light emitting layer is connected with at least one of the first light emitting layer and the second light emitting layer.

10. An EL display device according to claim 2, wherein the film is further overlapped with a light emitting portion of a dummy pixel.

13. An EL display device according to claim 2, wherein the first and second coloring layer are formed over an opposing substrate.

22. An EL display device according to claim 2, wherein the first and the second light emitting layers are connected with each other.

3. An EL display device comprising:

at least a first coloring layer for a first color, and a second coloring layer for a second color,

a first pixel comprising a first pixel electrode,

a second pixel comprising a second pixel electrode,

a first light emitting layer adjacent to the first pixel electrode, and

a second light emitting layer adjacent to the second pixel electrode,

wherein the first color is different from the second color,

wherein the first pixel electrode is overlapped with the first coloring layer and the second pixel electrode is overlapped with the second coloring layer,

wherein a film comprising at least a laminate of a portion of the first coloring layer and a portion of the second coloring layer is overlapped with at least a region between the first and second electrodes,

wherein emitted light from the first light emitting layer is filtered by the first coloring layer, and

wherein emitted light from the second light emitting layer is filtered by the second coloring layer.

7. An EL display device according to claim 3 further comprising a third coloring layer for a third color and a third pixel comprising a third pixel electrode,

wherein the third pixel electrode is overlapped with the third coloring layer,

wherein the third color is different from both of the first and second colors, and

wherein the film further comprises a portion of the third coloring layer, and the film is overlapped with at least the region between the first and second electrodes.

8. An EL display device according to claim 7, wherein the third light emitting layer is connected with at least one of the first light emitting layer and the second light emitting layer.

11. An EL display device according to claim 3, wherein the film is further overlapped with a light emitting portion of a dummy pixel.

14. An EL display device according to claim 3, wherein the first and second coloring layer are formed over an opposing substrate.

23. An EL display device according to claim 3, wherein the first and the second light emitting layers are connected with each other.

15. An EL display device comprising:

first and second thin film transistors over a substrate;

an insulating film over the first and second thin film transistor;

first and second pixel electrodes on the insulating film;

a first light emitting layer adjacent to the first pixel electrode;

a second light emitting layer adjacent to the second pixel electrode; and

a first coloring layer for a first color and a second coloring layer for a second color,

wherein the first pixel electrode is electrically connected to the first thin film transistor and the second pixel electrode is electrically connected to the second thin film transistor,

wherein the first color is different from the second color,

wherein the first pixel electrode is overlapped with the first coloring layer and the second pixel electrode is overlapped with the second coloring layer,

wherein a film comprising at least a laminate of a portion of the first coloring layer and a portion of the second coloring layer is overlapped with a region except a light emitting portion of the first and second pixels,

wherein emitted light from the first light emitting layer if filtered by the first coloring layer, and

wherein emitted light from the second light emitting layer is filtered by the second coloring layer.

17. An EL display device according to claim 15, wherein the region includes at least one of a source signal line, a gate signal line, and a light emitting portion of a dummy pixel.

19. An EL display device according to claim 15, wherein the first and second coloring layer are formed over an opposing substrate.

24. An EL display device according to claim 15, wherein the first and the second light emitting layers are connected with each other.

16. An EL display device comprising:

first to third thin film transistors over a substrate;

an insulating film over the first to third thin film transistor;

first to third pixel electrodes on the insulating film;

a first coloring layer for a first color;

a second coloring layer for a second color;

a third coloring layer for a third color;

a first light emitting layer adjacent to the first pixel electrode;

a second light emitting layer adjacent to the second pixel electrode; and

a third light emitting layer adjacent to the third pixel electrode,

wherein the first to third pixel electrodes are electrically connected to the first and third thin film transistors respectively,

wherein the first to third colors are different from each other,

wherein the first pixel electrode is overlapped with the first coloring layer, the second pixel electrode is overlapped with the second coloring layer, and the third pixel electrode is overlapped with the third coloring layer,

wherein a film comprising a laminate of a portion of the first coloring layer, a portion of the second coloring layer, and a portion of the third coloring layer is overlapped with a region except a light emitting portion of the first to third pixel electrodes,

wherein emitted light from the first light emitting layer is filtered by the first coloring layer,

wherein emitted light from the second light emitting layer is filtered by the second coloring layer, and

wherein emitted light from the third light emitting layer is filtered by the third coloring layer.

18. An EL display device according to claim 16, wherein the region includes at least one of a source signal line, a gate signal line and a light emitting portion of a dummy pixel.

20. An EL display device according to claim 16, wherein the first to third coloring layer are formed over an opposing substrate.

25. An EL display device according to claim 16, wherein the first to the third light emitting layers are connected with each other.