Patent ID: 7306978

Claim:
A method of manufacturing a light emitting device comprising the steps of: forming a thin film transistor having a semiconductor layer including a source region, a drain region, and a channel formation region between the source region and the drain region, a gate insulating film, and a gate electrode over a substrate; forming a heat-resistant planarizing film over the thin film transistor; forming a transparent conductive film over the heat-resistant planarizing film; forming an opening over the source region or the drain region and a peripheral portion having a tapered shape by selectively removing the heat-resistant planarizing film together with the transparent conductive film, wherein the opening has a tapered side surface; forming a contact hole reaching the source region or the drain region by selectively removing the gate insulating film; forming a conductive film on the transparent conductive film; etching the conductive film using the transparent conductive film as an etching stopper so as to form an electrode reaching the source region or the drain region; forming an anode by patterning the transparent conductive film in contact with the electrode; forming a partition wall covering edges of the anode; forming a layer including an organic compound on the anode; and forming a cathode on the layer including the organic compound.