Organic light emitting devices and methods of fabricating the same

Patent metadata

Field	Value
Publication number	US-10121990-B2
Application number	US-201715417624-A
Country	US
Kind code	B2
Filing date	Jan 27, 2017
Priority date	Apr 28, 2016
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Disclosed are an organic light emitting device and a method of fabricating the same. The method of fabricating an organic light emitting device comprises forming a flexible substrate, and forming an organic light emitting layer on the flexible substrate. The forming the flexible substrate comprises, forming a first polymer pattern on a first metal layer, forming a second metal layer on an exposed portion of the first metal layer through the first polymer pattern, forming a gas barrier layer on the first polymer pattern and the second metal layer, forming a second polymer layer on the gas barrier layer, and removing the first metal layer to expose a surface of the first polymer pattern and a surface of the second metal layer.

First claim

What is claimed is:

1. A method of fabricating an organic light emitting device, the method comprising:
forming a flexible substrate; and
forming an organic light emitting layer on the flexible substrate,
wherein forming the flexible substrate comprises:
forming a first polymer pattern on a first metal layer;
forming a second metal layer on a portion of the first metal layer, the portion of the first metal layer being exposed through the first polymer pattern;
forming a gas barrier layer on the first polymer pattern and the second metal layer;
forming a second polymer layer on the gas barrier layer; and
removing the first metal layer to expose a surface of the first polymer pattern and a surface of the second metal layer.

2. The method of claim 1 , wherein the first metal layer comprises a material different from that of the second metal layer.

3. The method of claim 1 , wherein the gas barrier layer comprises silicon oxide (SiO 2 ), silicon nitride (SiNx), silicon oxynitride (SiOxNy), titanium oxide (TiO 2 ), zirconium oxide (ZrO 2 ), or aluminum oxide (Al 2 O 3 ).

4. The method of claim 1 , wherein the gas barrier layer comprises one or more inorganic layers or one or more organic layers.

5. The method of claim 1 , wherein the second metal layer is formed using an electroplating or an electroless plating.

6. The method of claim 1 , wherein the organic light emitting layer is formed on the surface of the first polymer pattern and the surface of the second metal layer.

7. The method of claim 1 , wherein forming the flexible substrate further comprises, before forming the second metal layer, coating a catalyst on a surface of the first metal layer.

8. The method of claim 1 , wherein forming the flexible substrate further comprises, before forming the second metal layer, performing a surface treatment process on the surface of the first polymer pattern to cause the surface of the first polymer pattern to have hydrophobic characteristics.

9. The method of claim 8 , wherein the surface treatment process comprises forming on the surface of the first polymer pattern a fluorinated organic layer, a silicone organic layer, or a self-assemble monolayer.

10. An organic light emitting device, comprising:
a flexible substrate;
a first electrode on the flexible substrate; and
an organic light emitting layer on the first electrode,
wherein the flexible substrate comprises:
a polymer layer;
a gas barrier layer on the polymer layer;
polymer patterns on the gas barrier layer; and
a metal line on a portion of the gas barrier layer, the portion of the gas barrier layer being exposed through the polymer patterns,

wherein the polymer patterns have a lower surface in contact with the gas barrier layer and an upper surface in contact with the first electrode.

11. The device of claim 10 , wherein the polymer patterns have a thickness the same as that of the metal line.

12. The device of claim 10 , wherein the polymer patterns have a thickness greater than that of the metal line.

13. The device of claim 10 , wherein the gas barrier layer comprises polyacryl, polyurethane, epoxypolymer, polyimide, polypropylene, fluorine-containing polymer, or silicone polymer.

14. The device of claim 10 , wherein the gas barrier layer comprises one or more inorganic layers or one or more organic layers.

15. The device of claim 10 , wherein the metal line has a lower surface in contact with the gas barrier layer and an upper surface in contact with the first electrode.

16. The device of claim 10 , wherein the metal line has a lower surface in contact with the gas barrier layer and an upper surface opposite to the lower surface, and the upper surface of the metal line is flush with the upper surface of the polymer patterns.

17. The device of claim 10 , wherein the metal line comprises first segments parallel extending in a first direction and second segments parallel extending in a second direction crossing the first direction, the first segments and the second segments being cross to each other.

18. The device of claim 17 , wherein
the polymer patterns are disposed spaced apart in the first direction and the second direction,
the first segments are interposed between the polymer patterns that are adjacent to each other in the second direction,
the second segments are interposed between the polymer patterns that are adjacent to each other in the first direction,
the organic light emitting device further comprises a side barrier that is disposed on an edge of the gas barrier layer and surrounds the metal line, the side barrier being physically connected to ends of the first segments and ends of the second segments.

19. The device of claim 18 , wherein
the polymer patterns are disposed in the polymer layer,
the gas barrier layer extends between the polymer layer and the metal line and between the polymer layer and the side barrier, the gas barrier layer being disposed between the polymer layer and the polymer patterns.

20. An organic light emitting device, comprising:
a flexible substrate; and
an organic light emitting layer on the flexible substrate,
wherein the flexible substrate comprises:
a polymer layer;
a gas barrier layer on the polymer layer;
polymer patterns on the gas barrier layer; and
a metal line on a portion of the gas barrier layer, the portion of the gas barrier layer being exposed through the polymer patterns,

wherein the metal line comprises first segments parallel extending in a first direction and second segments parallel extending in a second direction crossing the first direction, the first segments and the second segments being cross to each other,
wherein the polymer patterns comprise central patterns and an edge pattern,
wherein the central patterns fill spaces enclosed by the first segments and the second segments, and the edge pattern surrounds the metal line.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Cho Doo-Hee
• Lee Jonghee
• Cho Hyunsu
• Kwon Byoung-Hwa
• Moon Jaehyun
• Park Young Sam
• Shin Jin Wook
• Yu Byoung Gon
• Lee Hyunkoo
• Lim Jong Tae
• Cho Nam Sung
• Han Jun-Han

Classifications

• H01L51/0097

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic

• H01L51/5253 Primary

  Electricity · mapped topic

• H10K59/873

  Encapsulations · CPC title

• H10K50/844

  Encapsulations · CPC title