Patent ID: 7667385

Claim:
A thin film transistor for a flat display device, comprising: a substrate; a gate electrode formed on the substrate; a source electrode overlapping a first side portion of the gate electrode; a drain electrode overlapping a second side portion of the gate electrode; a gate insulator formed between i) the source and drain electrodes and ii) the gate electrode; and a semiconductor layer that contacts the source and drain electrodes, wherein one of the source or drain electrodes is formed of a transparent material and the other of the source and drain electrodes is formed of a material with a higher work function than the semiconductor layer, wherein the transparent source or drain electrode comprises a pixel electrode of an organic light emitting diode, wherein the pixel electrode is formed in the same layer as the transparent source or drain electrode, and wherein the semiconductor layer has an opening, and an insulator and a layer of the organic light emitting diode extend into the opening and cover a portion of the pixel electrode.