Patent ID: 8420465

Claim:
A method of manufacturing an organic thin film transistor, the method comprising the steps of: preparing a base member; forming a source electrode and a drain electrode with a channel therebetween on the base member; forming a bank layer on the base member, the bank layer having a first opening on the channel and a second opening on a predetermined area on the base member, the first opening being at a different position from the second opening, and the bank layer having a groove or grooves formed in a surface of the bank layer at a position between the first opening and the second opening; and applying an organic semiconductor solution on the channel through the first opening to form an organic semiconductor layer on the channel, wherein the predetermined area is an area into which the organic semiconductor solution is not to flow, and wherein the groove or grooves are configured to prevent the semiconductor solution from getting across the groove or grooves from a side of the first opening and flowing into the second opening when the semiconductor solution having been applied on the channel flows on a surface of the bank layer from the channel and spreads towards the second opening.