Patent ID: 7927662

Claim:
A method for performing a CVD process on a plurality of target substrates all together in a vertical CVD apparatus, the apparatus comprising: an airtight process chamber configured to accommodate the target substrates, a holder configured to hold the target substrates stacked at intervals in the process chamber, a heater configured to heat an atmosphere in the process chamber, an exhaust system configured to exhaust the process chamber, and a supply system configured to supply process gases into the process chamber, the method comprising: a first step of supplying one gas of first and second reactive gases into the process chamber without supplying the other gas into the process chamber, so as to cause said one gas to be adsorbed on surfaces of the target substrates in the process chamber; and a second step of supplying said other gas into the process chamber without supplying said one gas into the process chamber, so as to cause said other gas to act on said one gas adsorbed on the surfaces of the target substrates in the process chamber, wherein the first and second steps are repeated a plurality of times, thereby forming a thin film derived from the first and second reactive gases on the target substrates, the first reactive gas is a gas having a vapor pressure of 1.33 kPa or less, or a bond-dissociation energy of 250 kJ/mol or less, and the second reactive gas is a gas having a vapor pressure of 2.66 kPa or more, and a bond-dissociation energy of 250 kJ/mol or more, the first reactive gas is supplied into the process chamber only from a first delivery hole of the supply system disposed at a substantial bottom of the process chamber without the second reactive gas supplied from the first delivery hole, the second reactive gas is supplied into the process chamber only from a plurality of second delivery holes of the supply system arrayed in a vertical direction at a position adjacent to edges of the target substrates, said second delivery holes are distributed substantially entirely over a vertical length of the target substrates stacked at intervals and comprise horizontally injecting holes for injection of the second reactive gas between the substrates.