Patent ID: 6861300

Claim:
A method of fabricating a thin film transistor, comprising: providing a substrate; depositing amorphous silicon on the substrate; patterning the amorphous silicon to form a plurality of island-shaped amorphous silicon layers; forming spaces between the substrate and the amorphous silicon layers; forming a channel region, a source ohmic contact region, and a drain ohmic contact region on each of the amorphous silicon layers by ion doping the island-shaped amorphous silicon layers; forming a first insulating layer over the amorphous silicon layers; crystallizing the plurality of the island-shaped amorphous silicon layers to form a plurality of island-shaped polysilicon layers by irradiating laser beams onto the first insulating layer, wherein the plurality of the island-shaped polysilicon layers are the active layers of the thin film transistor; forming a gate electrode on the first insulating layer; and forming source and drain electrodes that contact the source and drain ohmic contact regions, respectively.