Patent ID: 7867813

Claim:
A method of forming an organic thin film transistor comprising source and drain electrodes with a channel region therebetween, a gate electrode, a dielectric layer disposed between the source and drain electrodes and the gate electrode, and an organic semiconductor disposed in at least the channel region between the source and drain electrodes, said method comprising: seeding the bottom surface of the channel region with crystallization sites prior to deposition of the organic semiconductor; and depositing the organic semiconductor onto the seeded surface whereby the organic semiconductor crystallizes at the crystallization sites forming crystalline domains in the channel region, wherein the crystallization sites comprise localized wetting domains in an anti-wetting matrix, wherein the localized wetting domains and the anti-wetting matrix are formed by depositing a mixture of wetting and anti-wetting material on the substrate for a top-gate organic thin film transistor or on the dielectric layer for a bottom gate organic thin film transistor.