Patent ID: 6994887

Claim:
A film deposition method using a chemical vapor deposition apparatus comprising: a substrate processing chamber; a susceptor; a heater disposed above the susceptor in the processing chamber; a first barrier gas supply port opened in an upper portion of the substrate processing chamber; and a raw-material-gas inlet port, the method comprising the steps of: (a) placing each of a plurality of substrates in the susceptor with a surface of each substrate for deposition of the film facing downward; (b) after the step (a), supplying a barrier gas to an upper surface of the susceptor from the first barrier gas supply port and supplying the barrier gas to an upper surface of the heater from the second barrier gas supply port, the barrier gas supplied from the second barrier gas supply port having a flow rate thereof controlled independently of a flow rate of the barrier gas supplied from the first barrier gas supply port; and (c) simultaneously with the step (b), supplying a raw material gas from the raw-material-gas inlet port to a lower surface of the susceptor to deposit the film on the substrate.