Patent ID: 8944874
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A method for fabricating an OLED, comprising: providing a transparent substrate; forming a first electrode on the transparent substrate; forming a first silicon nitride film and a second silicon nitride film on the first electrode, wherein the second silicon nitride film is thicker than the first silicon nitride film; etching the first silicon nitride film and the second silicon nitride film by a dry etching process to form a partition wall including a first silicon nitride film pattern and a second silicon nitride film pattern on the first electrode, wherein the first silicon nitride film pattern has a forwardly-tapered shape, and the second silicon nitride film pattern has an inversely-tapered shape, and the first silicon nitride film pattern and the second silicon nitride film pattern have different composition ratios between their silicon and nitrogen contents from each other, and wherein the forwardly-tapered shape and the inversely-tapered shape are formed simultaneously by one etching process, and wherein the forwardly-tapered shape and the inversely-tapered shape are formed by the dry etching process being processed from an interface between the first silicon nitride film and the second silicon nitride film; and forming an organic light emitting layer and a second electrode, sequentially, on both sides of the first electrode below a level of the partition wall.