Patent ID: 7646044

Claim:
A thin film transistor, comprising; a gate electrode with a flat surface; a semiconductor layer including an intrinsic portion disposed on the gate electrode; a gate insulating layer disposed between the semiconductor layer and the gate electrode, the gate insulating layer having a curved surface including a shape of a plurality of waves; and source and drain electrodes that have edges opposing each other with respect to the intrinsic portion of the semiconductor layer and are connected to the semiconductor layer, wherein the intrinsic portion has a curved surface and a varying vertical height with respect to the flat surface of the gate electrode between the source electrode and the drain electrode and directly over the flat surface of the gate electrode, the curved surface of the intrinsic portion including a shape of a plurality of waves, thereby increasing a current driving capacity, and wherein the curved surface of the intrinsic portion is formed along the curved surface of the gate insulating layer.