Patent ID: 9692020
Date: 2017-06-27
CPC Classifications: H01L

Claim:
1. A method of fabricating an organic light emitting device, the method comprising: forming a semiconductor active layer on a substrate, an insulated gate electrode on the semiconductor active layer, and a thin film transistor (TFT) having a source electrode and a drain electrode respectively brought into contact with the semiconductor active layer; forming a conductive material layer on an entire surface of the substrate containing the thin film transistor; forming a photoresist pattern on the conductive material layer; etching the conductive material layer using the photoresist pattern as an etch mask to form a first electrode electrically connected to the thin film transistor; implementing an ashing process to etch the photoresist pattern so as to expose an upper edge portion of the first electrode; forming a first insulating material layer on an entire surface of the substrate containing the first electrode and photoresist pattern to form a crack on a surface of the first insulating material layer; implementing a lift-off process to remove the photoresist pattern and the first insulating material layer formed at an upper portion of the photoresist pattern so as to form a first pixel define layer that covers an edge portion of the first electrode; forming a second pixel define layer made of a second insulating material layer on the first pixel define layer; forming an organic layer on the first electrode; and forming a second electrode on the organic layer, wherein a width of the second pixel define layer is smaller than a width of the first pixel define layer.