Patent ID: 7335266

Claim:
A substrate processing system including: a susceptor, located within a single-wafer deposition chamber, said susceptor to hold a substrate during a substrate processing; a gas supply apparatus for introducing a reactant gas mixture into said single-wafer deposition chamber to deposit a lightly phosphorous doped silicon film over said substrate, said reactant gas mixture comprising a disilane gas and a phosphorous source gas; a controller for controlling said gas supply apparatus; and a memory device coupling to said controller, said memory device comprising a computer-readable medium having a computer readable program embodied therein for directing operation of said substrate processing system, said computer-readable program including instructions for obtaining a phosphorous doping concentration in said lightly phosphorous doped silicon film less than 1×10 20 atoms/cm 3 , for controlling said gas supply apparatus to introduce said reactant gas mixture, for maintaining a process temperature between 500° C. and 650° C., for maintaining a process pressure between 30 Torr and 350 Torr, and for controlling a flow ratio for said reactant gas mixture.