Patent ID: 8372686

Claim:
A method for producing an organic thin film transistor comprising, on a substrate, a source electrode, a gate electrode, a drain electrode, an insulating layer and an organic semiconductor layer, said method comprising: forming the source electrode and the drain electrode such that one of the source and drain electrodes, which is an inner-located electrode, has an outer circumference which is in the shape of a circle or is in the shape of a polygon and that the other of the source and drain electrodes, which is an outer-located electrode, has an inner circumference facing the outer circumference of the inner-located electrode, the inner circumference being of a shape which is substantially concentric with the outer circumference of the inner-located electrode; forming the organic semiconductor layer, after forming the source electrode and the drain electrode, so as to connect the source electrode and the drain electrode to each other by a process of dropping an organic semiconductor material; forming a water repellent layer on the source electrode and the drain electrode formed by the electrode forming step; forming a protection layer on the substrate with the organic semiconductor layer; removing the water repellent layer; and forming a contact hole which pierces through the protection layer.