Organic light-emitting display device and method of manufacturing the same

• US 9,306,187 B2
• Filed: 11/20/2013
• Issued: 04/05/2016
• Est. Priority Date: 04/30/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Jae-Sun, Lee, Ung-Soo, Park, Sang-Young
• Primary Examiner(s): Toledo, Fernando L
• Assistant Examiner(s): NGUYEN, LAWRENCE-LIN T
• Application Number:
  US14/085,590
• Publication Number:
  US 20140319481A1
• Time in Patent Office: 867 Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Provided is an organic light-emitting display device for forming a strong sealing structure. The organic light-emitting display device includes: a lower electrode that is disposed on a substrate; a first barrier wall that protrudes beyond a top surface of the lower electrode; and a second barrier wall that is disposed on at least a top surface of the first barrier wall and has a cross-section having a reverse-tapered shape, wherein the second barrier wall includes a low temperature viscosity transition (LVT) inorganic material including tin oxide.

Claims

1. An organic light-emitting display device comprising:

a lower electrode disposed on a substrate;

a first barrier wall that protrudes beyond a top surface of the lower electrode; and

a second barrier wall that is disposed on at least a top surface of the first barrier wall and has a cross-section having a reverse-tapered shape with respect to the first barrier wall,

wherein the second barrier wall comprises a low temperature viscosity transition (LVT) inorganic material comprising tin oxide.

2. The organic light-emitting display device of claim 1, further comprising:

an organic film that is disposed on the top surface of the lower electrode, and a top surface of the second barrier wall, that is discontinuous along an edge of the second barrier wall; and

an upper electrode that is disposed on the organic film that is discontinuous along the edge of the second barrier wall.

3. The organic light-emitting display device of claim 2, further comprising a protective film that is disposed on the upper electrode and that is discontious along the edge of the second barrier wall.

4. The organic light-emitting display device of claim 2, further comprising a thin film encapsulation unit that is disposed over the substrate to cover the upper electrode and comprises at least one thin film comprising an inorganic material.

5. The organic light-emitting display device of claim 4, wherein the inorganic material comprises the LVT inorganic material comprising tin oxide.

6. The organic light-emitting display device of claim 1, further comprising a sealing film that surrounds an outer surface of the first barrier wall and comprises an inorganic material.

7. The organic light-emitting display device of claim 6, wherein the sealing film comprises an LVT inorganic material comprising tin oxide.

8. The organic light-emitting display device of claim 7, wherein the LVT inorganic material included in the second barrier wall and the LVT inorganic material included in the sealing film are different from each other.

9. The organic light-emitting display device of claim 6, wherein the first barrier wall comprises an LVT inorganic material comprising tin oxide.

10. The organic light-emitting display device of claim 9, wherein the LVT inorganic material included in the first barrier wall and the LVT inorganic material included in the sealing film are different from each other.

11. The organic light-emitting display device of claim 1, wherein the first barrier wall and the second barrier wall are disposed between adjacent lower electrodes.

12. The organic light-emitting display device of claim 1, wherein the first barrier wall and the second barrier wall are disposed to surround an edge of the lower electrode.

13. The organic light-emitting display device of claim 1, wherein the substrate comprises a display area and a peripheral area,

wherein the first barrier wall and the second barrier wall are disposed to surround an edge of the display area.

14. A method of manufacturing an organic light-emitting display device, the method comprising:

forming a lower electrode on a substrate;

forming a first barrier wall to protrude beyond a top surface of the lower electrode; and

forming a second barrier wall having a cross-section having a reverse-tapered shape with respect to the first barrier wall on at least a top surface of the first barrier wall,

wherein the second barrier wall comprises a low temperature viscosity transition (LVT) inorganic material comprising tin oxide.

15. The method of claim 14, further comprising:

forming on the top surface of the lower electrode and a top surface of the second barrier wall an inorganic film that is discontinuous along an edge of the second barrier wall; and

forming on the organic film an upper electrode that is discontinuous along the edge of the second barrier wall.

16. The method of claim 15, further comprising forming on the upper electrode a protective film that is discontinuous along the edge of the second barrier wall and comprises an organic material.

17. The method of claim 15, further comprising forming a thin film encapsulation unit over the entire substrate to cover the upper electrode and comprises at least one thin film comprising an inorganic material.

18. The method of claim 17, wherein the inorganic material comprises the LVT inorganic material comprising tin oxide.

19. The method of claim 14, further comprising forming a sealing film that surrounds an outer surface of the first barrier wall and comprises an inorganic material.

20. The method of claim 19, wherein the sealing film comprises an LVT inorganic material comprising tin oxide.

21. The method of claim 20, wherein the LVT inorganic material included in the second barrier wall and the LVT inorganic material included in the sealing film are different from each other.

22. The method of claim 20, wherein the first barrier wall comprises an LVT inorganic material comprising tin oxide.

23. The method of claim 22, wherein the LVT inorganic material included in the first barrier wall and the LVT inorganic material included in the sealing film are different from each other.