Light emitting apparatus and method of manufacturing the same

• US 20010024083A1
• Filed: 03/23/2001
• Published: 09/27/2001
• Est. Priority Date: 03/27/2000
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fukunaga, Takeshi, Yamazaki, Shunpei
• Granted Patent: US 7,301,276 B2
• Time in Patent Office: Days
• US Class Current: 313/483
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: H05B 33/06 Electrode terminals
• CPC Class Codes: H05B 33/26 characterised by the composition or arrangement of the conductive material used as an electrode
• CPC Class Codes: H10K 50/814 combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/1795 comprising structures specially adapted for lowering the resistance

Abstract

A light emitting apparatus with high homogeneity in image quality is provided, which includes anodes 102 on an insulator 101, cathodes 107 orthogonal to the anodes 102, and EL layers 106 interposed between the anodes 102 and the cathodes 107, and auxiliary wirings 103 are electrically connected to the anodes 102. The auxiliary wirings 103 are made of a material lower in resistance than that of the anodes 102, thereby being capable of reducing the wiring resistance of the anodes 102.

Claims

1. A light emitting apparatus, comprising:

an insulator;

anodes formed on said insulator;

cathodes formed on said insulator so as to be orthogonal to said anodes; and

luminescent materials interposed between said anodes and said cathodes,

wherein auxiliary wirings are electrically connected to said anodes.

2. An apparatus according to

claim 1

, wherein said auxiliary wirings are formed of a metal film.

3. An apparatus according to

claim 2

, wherein said metal film comprises platinum, palladium, nickel, gold, aluminum, copper, silver, tantalum, tungsten, molybdenum or titanium.

4. An apparatus according to

claim 1

, wherein said anodes are formed of electrically conductive oxide films.

5. An apparatus according to

claim 1

, wherein said anodes and said cathodes are electrically connected to a driver circuit, and said driver circuit is formed on a substrate made of any one selected from a group consisting of glass, quartz glass, silicon or plastic.

6. An electric device using an apparatus according to

claim 1

.

7. A light emitting apparatus, comprising:

an insulator;

anodes formed on said insulator;

cathodes formed on said insulator so as to be orthogonal to said anodes; and

luminescent materials interposed between said anodes and said cathodes,

wherein wirings different in material from said anodes are electrically connected to said anodes in regions where said anodes and said cathodes cross each other.

8. An apparatus according to

claim 7

, wherein said wirings are formed of metal films.

9. An apparatus according to

claim 8

, wherein said metal films comprise platinum, palladium, nickel, gold, aluminum, copper, silver, tantalum, tungsten, molybdenum or titanium.

10. An apparatus according to

claim 7

, wherein said anodes are formed of electrically conductive oxide films.

11. An apparatus according to

claim 7

, wherein said anodes and said cathodes are electrically connected to a driver circuit, and said driver circuit is formed on a substrate made of any one selected from a group consisting of glass, quartz glass, silicon or plastic.

12. An electric device using an apparatus according to

claim 7

.

13. A light emitting apparatus, comprising:

an insulator;

anodes formed on said insulator;

cathodes formed on said insulator so as to be orthogonal to said anodes; and

luminescent materials interposed between said anodes and said cathodes,

wherein wirings made of a material lower in resistance than that of said anodes are electrically connected to said anodes in regions where said anodes and said cathodes cross each other.

14. An apparatus according to

claim 13

, wherein said wirings are formed of metal films.

15. An apparatus according to

claim 14

, wherein said metal films comprise platinum, palladium, nickel, gold, aluminum, copper, silver, tantalum, tungsten, molybdenum or titanium.

16. An apparatus according to

claim 13

, wherein said anodes are formed of electrically conductive oxide films.

17. An apparatus according to

claim 13

, wherein said anodes and said cathodes are electrically connected to a driver circuit, and said driver circuit is formed on a substrate made of any one selected from a group consisting of glass, quartz glass, silicon or plastic.

18. An electric device using an apparatus according to

claim 13

.

19. A method of manufacturing a light emitting apparatus, comprising the steps of:

forming anodes and auxiliary wirings electrically connected to said anodes on an insulator;

forming luminescent materials on said anodes; and

forming cathodes on said luminescent materials.

20. A method according to

claim 19

, wherein a material lower in resistance than that of said anodes is used as said auxiliary wirings.

21. A method according to

claim 20

, wherein said auxiliary wirings comprise an element selected from the group consisting of platinum, palladium, nickel, gold, aluminum, copper, silver, tantalum, tungsten, molybdenum, and titanium.

22. A method of manufacturing a light emitting apparatus, comprising the steps of:

forming cathodes on an insulator;

forming luminescent materials on said cathodes; and

forming anodes and auxiliary wirings electrically connected to said anodes on said luminescent materials.

23. A method according to

claim 22

, wherein a material lower in resistance than that of said anodes is used as said auxiliary wirings.

24. A method according to

claim 22

, wherein said auxiliary wirings comprise an element selected from the group consisting of platinum, palladium, nickel, gold, aluminum, copper, silver, tantalum, tungsten, molybdenum, and titanium.