Patent ID: 7772079

Claim:
A method for fabricating a vertical organic transistor, comprising the following steps: providing a substrate; forming an emitter on said substrate; forming an organic semiconductor layer on said emitter and forming a grid inside said organic semiconductor layer and forming a plurality of openings in said grid with a non-photolithographic method, wherein said grid is separated from said emitter, wherein the step of forming said organic semiconductor layer further comprises the following steps: forming a first organic semiconductor layer on said emitter with a spin-coating method; disposing a plurality of polystyrene spheres on said first organic semiconductor layer with a spin-coating method; forming said grid on said polystyrene spheres with a vapor deposition method to obtain said plurality of openings in said grid; and forming a second organic semiconductor layer on said grid with a spin-coating method to complete said organic semiconductor layer; and forming a collector on said organic semiconductor layer, wherein said collector is separated from said grid.