Patent ID: 8901658

Claim:
A thin film transistor, comprising: a gate; a semiconductor layer, having a first end and a second end opposite to the first end; an insulation layer, disposed between the gate and the semiconductor layer and having a first surface facing away from the gate, wherein the semiconductor layer has a second surface facing the gate and a third surface facing away from the gate; a source, clamping the first end of the semiconductor layer and the source having: a first electrode portion, connected to the first end of the semiconductor layer and disposed on the third surface; and a second electrode portion, connected to the first electrode portion and the first end of the semiconductor layer, wherein at least a part of the second electrode portion is disposed between the first surface and the second surface; and a drain, clamping the second end of the semiconductor layer and the drain having: a third electrode portion, connected to the second end of the semiconductor layer and disposed on the third surface; and a fourth electrode portion, connected to the third electrode portion and the second end of the semiconductor layer, wherein at least a part of the fourth electrode portion is disposed between the first surface and the second surface, wherein an orthogonal projection of the gate onto the second surface and the second electrode portion are not overlapped with each other, the orthogonal projection of the gate onto the second surface and the fourth electrode portion are not overlapped with each other, the orthogonal projection of the gate onto the second surface and the first electrode portion are overlapped with each other, and the orthogonal projection of the gate onto the second surface and the third electrode portion are overlapped with each other.