Patent ID: 8723172

Claim:
A thin film transistor, comprising: a gate electrode disposed on a first substrate; a gate insulating layer disposed on the first substrate and covering the gate electrode; a source electrode disposed above the gate insulating layer and corresponding to one side of the gate electrode; a drain electrode disposed above the gate insulating layer and corresponding to another side of the gate electrode; and an oxide semiconductor layer with a channel region conformably disposed on the gate insulating layer, the channel region disposed between the source electrode and the drain electrode, wherein the source electrode has a first inner side surface, a first outer side surface, a first top surface facing the oxide semiconductor layer and a first bottom surface facing the gate insulating layer, the first inner side surface and the first outer side surface are connected between the first top surface and the first bottom surface, the drain electrode has a second inner side surface, a second outer side surface, a second top surface facing the oxide semiconductor layer and a second bottom surface facing the gate insulating layer, the second inner side surface and the second outer side surface are connected between the second top surface and the second bottom surface, the first inner side surface and the second inner side surface face the channel region, the first outer side surface and the second outer side surface are far away from the channel region, and the oxide semiconductor layer covers the first outer side surface of the source electrode and the second side surface of the drain electrode.