Organic light emitting diode display device and method of fabricating the same

摘要

In an organic light emitting diode (OLED) display device and a method for fabricating the same, OLED pixels are patterned through a photolithography process, so a large area patterning can be performed and a fine pitch can be obtained, and an organic compound layer can be protected by forming a buffer layer of a metal oxide on an upper portion of the organic compound layer or patterning the organic compound layer by using a cathode as a mask, improving device efficiency. In addition, among red, green, and blue pixels, two pixels are patterned through a lift-off process and the other remaining one is deposited to be formed without patterning, the process can be simplified and efficiency can be increased.

主权项

1. A method for fabricating an organic light emitting diode (OLED) display device, the method comprising:
forming a plurality of first electrodes on a substrate; forming a first hole injection layer, a first hole transport layer, a first light emitting layer, a first electron transport layer, and a first buffer layer in a laminated manner on the substrate through a first photo process including a first etching process; forming a second hole injection layer, a second hole transport layer, a second light emitting layer, a second electron transport layer, and a second buffer layer in a laminated manner on the substrate through a second photo process including a second etching process; forming a third hole injection layer, a third hole transport layer, a third light emitting layer, a third electron transport layer, and a third buffer layer in a laminated manner on the substrate through a third photo process including a third etching process; and forming a plurality of second electrodes respectively on the first, second, and third buffer layers, wherein the first, second, and third buffer layers are made of a metal oxide.