Patent ID: 7781762

Claim:
An organic transistor comprising: a source electrode and a drain electrode; an organic semiconductor layer disposed between the source electrode and the drain electrode; a gate insulating layer; and a gate electrode opposing the source and drain electrodes with the organic semiconductor layer and the gate insulating layer therebetween, wherein the organic semiconductor layer includes a first semiconductor portion in a region where the gate electrode and the source electrode oppose each other, a second semiconductor portion in a region where the gate electrode and the drain electrode oppose each other, and a third semiconductor portion between the first semiconductor portion and the second semiconductor portion; and the first semiconductor portion, the second semiconductor portion, the third semiconductor portion, the source electrode, and the drain electrode satisfy the relationships of W 1 <W 3 , W 2 <W 3 , W 4 <W 3 , and W 5 <W 3 , wherein W 1 represents the average thickness of the first semiconductor portion, W 2 represents the average thickness of the second semiconductor portion, W 3 represents the average thickness of the third semiconductor portion, W 4 represents a height of an upper surface of the first semiconductor portion from a lower surface of the source electrode, and W 5 represents a height of an upper surface of the second semiconductor portion from a lower surface of the drain electrode.