EL display device and a method of manufacturing the same

• US 7,989,812 B2
• Filed: 04/05/2006
• Issued: 08/02/2011
• Est. Priority Date: 10/12/1999
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fukunaga, Takeshi, Hiroki, Masaaki, Yamamoto, Kunitaka, Yamazaki, Shunpei
• Primary Examiner(s): SEFER, AHMED N
• Application Number:
  US11/399,024
• Publication Number:
  US 20060180826A1
• Time in Patent Office: 1,945 Days
• Field of Search: 257/72, 257/40, 257/59, 257/79
• US Class Current: 257/72
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/851 Division of substrate

Abstract

To provide a high throughput film deposition means for film depositing an organic EL material made of polymer accurately and without any positional shift. A pixel portion is divided into a plurality of pixel rows by a bank, and a head portion of a thin film deposition apparatus is scanned along a pixel row to thereby simultaneously apply a red light emitting layer application liquid, a green light emitting layer application liquid, and a blue light emitting layer application liquid in stripe shapes. Heat treatment is then performed to thereby form light emitting layers luminescing each of the colors red, green, and blue.

Claims

1. A semiconductor device comprising:

a first glass substrate;

a plurality of cathodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of cathodes;

a hole injection layer formed over the light emitting layer;

a plurality of anodes in a stripe shape so as to intersect with the plurality of cathodes, over the hole injection layer;

a plurality of banks formed in a stripe shape so as to fill up spaces between the plurality of cathodes;

a second glass substrate over the plurality of anodes; and

a seal material pasting the first and second glass substrates to each other,

wherein the hole injection layer is a continuous layer formed over the plurality of banks.

2. The semiconductor device according to claim 1,

wherein the light emitting layer includes an organic EL material.

3. The semiconductor device according to claim 1,

wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

4. The semiconductor device according to claim 1,

wherein the plurality of banks have a side surface perpendicular to the first glass substrate.

5. The semiconductor device according to claim 1,

wherein the seal material covers a side edge of the first glass substrate and a side edge of the second glass substrate.

6. The semiconductor device according to claim 1,

wherein the light emitting layer comprises a red light emitting layer, a green light emitting layer and a blue light emitting layer.

7. The semiconductor device according to claim 1,

wherein the seal material further covers a part of a bottom surface of the first glass substrate and a part of a top surface of the second glass substrate.

8. The semiconductor device according to claim 1,

wherein a frame material, which covers a side edge of the first glass substrate and a side edge of the second glass substrate, is attached to the semiconductor device with the seal material.

9. A semiconductor device comprising:

a first glass substrate;

a plurality of cathodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of cathodes;

a hole injection layer formed over the light emitting layer;

a plurality of anodes in a stripe shape so as to intersect with the plurality of cathodes, over the hole injection layer;

a plurality of banks formed in a stripe shape so as to fill up spaces between the plurality of cathodes;

a second glass substrate over the plurality of anodes;

a dry agent provided between the plurality of anodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each others,

wherein the hole injection layer is a continuous layer formed over the plurality of banks.

10. The semiconductor device according to claim 9,

wherein the light emitting layer includes an organic EL material.

11. The semiconductor device according to claim 9,

wherein the dry agent includes a barium oxide.

12. The semiconductor device according to claim 9,

wherein the plurality of banks have a side surface perpendicular to the first glass substrate.

13. The semiconductor device according to claim 9,

wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

14. The semiconductor device according to claim 9,

wherein the seal material covers a side edge of the first glass substrate and a side edge of the second glass substrate.

15. The semiconductor device according to claim 9,

wherein the light emitting layer comprises a red light emitting layer, a green light emitting layer and a blue light emitting layer.

16. The semiconductor device according to claim 9,

wherein the seal material further covers a part of a bottom surface of the first glass substrate and a part of a top surface of the second glass substrate.

17. The semiconductor device according to claim 9,

wherein a frame material, which covers a side edge of the first glass substrate and a side edge of the second glass substrate, is attached to the semiconductor device with the seal material.

18. A semiconductor device comprising:

a first glass substrate;

a plurality of cathodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of cathodes;

a hole injection layer formed over the light emitting layer;

a plurality of anodes in a stripe shape so as to intersect with the plurality of cathodes, over the hole injection layer;

a second glass substrate over the plurality of anodes;

a plurality of banks formed in a stripe shape so as to fill up spaces between the plurality of cathodes;

a dry agent provided between the plurality of anodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other,

wherein the plurality of cathodes are transparent and the plurality of anodes are reflective, and

wherein the hole injection layer is a continuous layer formed over the plurality of banks.

19. The semiconductor device according to claim 18,

wherein the light emitting layer includes an organic EL material.

20. The semiconductor device according to claim 18,

wherein the plurality of banks have a side surface perpendicular to the first glass substrate.

21. The semiconductor device according to claim 18,

wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

22. The semiconductor device according to claim 18,

wherein the seal material covers a side edge of the first glass substrate and a side edge of the second glass substrate.

23. The semiconductor device according to claim 18,

wherein the light emitting layer comprises a red light emitting layer, a green light emitting layer and a blue light emitting layer.

24. The semiconductor device according to claim 18,

wherein the seal material further covers a part of a bottom surface of the first glass substrate and a part of a top surface of the second glass substrate.

25. The semiconductor device according to claim 18,

wherein a frame material, which covers a side edge of the first glass substrate and a side edge of the second glass substrate, is attached to the semiconductor device with the seal material.

26. A semiconductor device comprising:

a first glass substrate;

a plurality of cathodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of cathodes;

a hole injection layer formed over the light emitting layer;

a plurality of anodes in a stripe shape so as to intersect with the plurality of cathodes, over the hole injection layer;

a plurality of banks formed in a stripe shape so as to fill up spaces between the plurality of cathodes;

a second glass substrate over the plurality of anodes; and

a seal material pasting the first and second glass substrates to each other,

wherein a light generated by the light emitting layer is irradiated toward the first glass substrate, and

wherein the hole injection layer is a continuous layer formed over the plurality of banks.

27. The semiconductor device according to claim 26,

wherein the light emitting layer includes an organic EL material.

28. The semiconductor device according to claim 26,

wherein the plurality of banks have a side surface perpendicular to the first glass substrate.

29. The semiconductor device according to claim 26,

wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

30. The semiconductor device according to claim 26,

wherein the seal material covers a side edge of the first glass substrate and a side edge of the second glass substrate.

31. The semiconductor device according to claim 26,

wherein the light emitting layer comprises a red light emitting layer, a green light emitting layer and a blue light emitting layer.

32. The semiconductor device according to claim 26,

wherein the seal material further covers a part of a bottom surface of the first glass substrate and a part of a top surface of the second glass substrate.

33. The semiconductor device according to claim 26,

wherein a frame material, which covers a side edge of the first glass substrate and a side edge of the second glass substrate, is attached to the semiconductor device with the seal material.