Patent ID: 7790580

Claim:
A method of forming a polycrystalline silicon film comprising the steps: depositing a first layer of amorphous silicon thin film on a substrate; forming a second layer of thin film on the first layer of amorphous silicon thin film; patterning the second layer of thin film so that the first layer of amorphous silicon thin film is exposed at selected locations to expose major and minor areas of the first layer, and wherein the second layer is removed when the second layer is organic; depositing a thin layer of a nickel containing compound on the exposed selected locations on the first amorphous silicon thin film; removing the second layer of thin film; forming a native silicon oxide layer on exposed locations of the first layer of amorphous silicon thin film; and annealing the resulting composite layer of thin film at a sufficient temperature to convert the first layer of amorphous silicon thin film into polycrystalline silicon.