Patent ID: 7601567

Claim:
A method of forming an organic thin film transistor, the method comprising: forming source and drain electrodes over a substrate; forming a first insulating layer over the substrate such that the source and drain electrodes are buried under the first insulating layer, the first insulating layer comprising a first surface; hydrophobically treating the first surface so as to make the first surface substantially more hydrophobic than before the treatment; subsequent to treating the first surface, forming an opening in the first insulating layer so as to at least partially expose the source and drain electrodes, wherein the first insulating layer comprises an interior surface within the opening, wherein the first surface is substantially more hydrophobic than the interior surface; forming an organic semiconductor material within the opening such that the organic semiconductor material contacts the source and drain electrodes; forming a second insulating layer over the organic semiconductor material; and hydrophilically treating the first surface after forming the second insulating layer so as to make the first surface substantially more hydrophilic than immediately prior to the hydrophilic treatment.