Organic light emitting display and method of manufacturing the same
View Patent ↗In a method of manufacturing an organic light emitting display according to an embodiment, when a thin film transistor substrate including a display area and a non-display area is prepared, an organic light emitting layer is formed on the display area. Then, a first cathode layer is formed on the organic light emitting layer through a first deposition method, and a second cathode layer is formed on the first cathode layer through a second deposition method. The first and/or second deposition method may be performed by using heat. Thus, the light-emitting quality of the organic light emitting display may be improved.
1. A method of manufacturing an organic light emitting display, the method comprising:
preparing a thin film transistor substrate including a display area and a non-display area;
forming an organic light emitting layer on the display area;
forming a first cathode layer on the organic light emitting layer through a first deposition method; and
forming a second cathode layer directly on the first cathode layer through a second deposition method,
wherein at least one of the first deposition method or the second deposition method is performed by a heat vaporizing method.
2. The method of claim 1 , wherein the first deposition method is the heat vaporizing method and the second deposition method is a sputtering method.
3. The method of claim 1 , wherein the second cathode layer covers a portion of the non-display area.
4. The method of claim 3 , wherein the first cathode layer covers an upper surface and a side surface of the organic light emitting layer.
5. The method of claim 2 , wherein the forming of the first cathode layer comprises:
fixing a mask that is used in forming the organic light emitting layer and is spaced apart from the thin film transistor substrate; and
depositing a conductive material on the organic light emitting layer.
6. The method of claim 5 , wherein the second cathode layer comprises a same material as the first cathode layer.
7. The method of claim 5 , wherein the second cathode layer comprises a different material from the first cathode layer.
8. The method of claim 5 , wherein the conductive material comprises aluminum (Al), silver (Ag), gold (Au), copper (Cu), or an alloy thereof.
9. The method of claim 4 , wherein end portions of the first cathode layer have a width of about 0.5 mm to about 5 mm from end portions of the organic light emitting layer, respectively.
10. The method of claim 9 , wherein end portions of the second cathode layer have a width of about 1 mm to about 10 mm from the end portions of the first cathode layer, respectively.
11. The method of claim 1 , wherein the first cathode layer is thinner than the second cathode layer.
12. The method of claim 11 , wherein the first cathode layer has a thickness of about 100 angstroms to about 1000 angstroms, and the second cathode layer has a thickness of about 1001 angstroms to about 5000 angstroms.
13. The method of claim 1 , wherein the first deposition method is the heat vaporizing method and the second deposition method is a method other than the heat vaporizing method.