LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREOF

• US 20080211396A1
• Filed: 03/26/2008
• Published: 09/04/2008
• Est. Priority Date: 01/29/2001
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime
• Granted Patent: US 7,973,471 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/8052 Cathodes
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

There is provided a method for manufacturing a light emitting device in which no copy-in is caused in the case of a light emitting device having a glossy cathode. An uneven portion is formed on the surface of a cathode which is in contact with an organic layer in a pixel portion, and incident light is reflected in all directions. An insulating film having a high light absorption property is formed in a driver circuit portion, and the copy-in becomes invisible to the observer.

Claims

1. A light emitting device comprising:

at least a transparent protrusion;

a first electrode over the transparent protrusion;

an organic layer over the first electrode and in contact with a portion of the first electrode; and

a second electrode over the organic layer.

2. A light emitting device according to claim 1,

wherein the first electrode has a property of transmitting light.

3. A light emitting device according to claim 1, further comprising an insulating film,

wherein the transparent protrusion is provided over the insulating film.

4. A light emitting device according to claim 1,

wherein the first electrode is overlapped with a plurality of the transparent protrusion.

5. A light emitting device comprising:

at least a protrusion having a property of transmitting light;

a first electrode over the protrusion having the property of transmitting light;

an organic layer over the first electrode and in contact with a portion of the first electrode; and

a second electrode over the organic layer.

6. A light emitting device according to claim 5,

wherein the first electrode has a property of transmitting light.

7. A light emitting device according to claim 5, further comprising an insulating film,

wherein the protrusion having the property of transmitting light is provided over the insulating film.

8. A light emitting device according to claim 5,

wherein the first electrode is overlapped with a plurality of the protrusion having the property of transmitting light.

9. A light emitting device comprising:

at least a layer containing a transparent material;

a first electrode over the layer containing the transparent material;

an organic layer over the first electrode and in contact with a portion of the first electrode; and

a second electrode over the organic layer.

10. A light emitting device according to claim 9,

wherein the first electrode has a property of transmitting light.

11. A light emitting device according to claim 9, further comprising an insulating film,

wherein the layer containing the transparent material is provided over the insulating film.

12. A light emitting device according to claim 9,

wherein the first electrode is overlapped with a plurality of the layer containing the transparent material.

13. A light emitting device comprising:

at least a layer having a property of transmitting light;

a first electrode over the layer having the property of transmitting light;

an organic layer over the first electrode and in contact with a portion of the first electrode; and

a second electrode over the organic layer.

14. A light emitting device according to claim 13,

wherein the first electrode has a property of transmitting light.

15. A light emitting device according to claim 13, further comprising an insulating film,

wherein the layer having the property of transmitting light is provided over the insulating film.

16. A light emitting device according to claim 13,

wherein the first electrode is overlapped with a plurality of the layer having the property of transmitting light.