Patent ID: 7935977
Filing Date: 2011-05-03
Classification: H01L

Abstract:
1. A method of manufacturing an organic light emitting device, comprising the steps of: (a) forming an insulating layer on a lower electrode; (b) etching the insulating layer to form an opening ranging from an upper surface of the insulating layer to the lower electrode so that an overhang structure having a lowermost circumference that is larger than an uppermost circumference is formed; (c) forming a conductive layer on an upper surface of the lower electrode in the opening and a surface of the insulating layer other than the overhang structure; (d) forming an organic material layer on the conductive layer formed on the upper surface of the lower electrode in the opening; and (e) forming an upper electrode on an upper surface of the conductive layer disposed on the surface of the insulating layer and an upper surface of the organic material layer, wherein the insulating layer includes a lower insulating layer that is formed on the lower electrode and an upper insulating layer that is formed on the lower insulating layer to have an etching rate that is lower than an etching rate of the lower insulating layer, the upper insulating layer and the lower insulating layer are etched to form openings that ranges from the upper insulating layer through the lower insulating layer to the lower electrode so that an overhang structure where a circumference of a lower opening formed in the lower insulating layer is larger than a circumference of an upper opening formed in the upper insulating layer is formed in step (b), and the overhang structure has a curved surface curved so that a diameter gradually increases as moving from an upper portion of the upper opening to a lower portion of the lower opening.