Patent ID: 7423293
Filing Date: 2008-09-09
Classification: H01L

Abstract:
1. A light emitting device comprising: a thin film transistor on an insulating surface, wherein the thin film transistor contains a semiconductor layer and a gate electrode over the semiconductor layer, wherein the gate electrode contains a first conductive layer which has a tapered cross section and a second conductive layer which does not have a tapered cross section over the first conductive layer, and wherein a top surface of the first conductive layer is wider than a bottom surface of the second conductive layer; an interlayer insulating film over the thin film transistor; an anode over the interlayer insulating film; a wiring electrically connected to the thin film transistor and the anode; a bank over the wiring and a portion of the anode; an insulating film over the anode and an upper surface of the bank; an organic compound layer over the anode with the insulating film interposed therebetween; and a cathode over the organic compound layer.