Patent ID: 8901013

Claim:
A substrate processing apparatus, comprising: a process chamber configured to house a substrate therein; a first heating source configured to heat a substrate in the process chamber to a first temperature; a pre-reaction chamber in which a reaction is induced among a plurality of kinds of gases; a second heating source configured to heat the pre-reaction chamber to a second temperature; an oxygen-containing gas supply system configured to supply an oxygen-containing gas into the pre-reaction chamber; a hydrogen-containing gas supply system configured to supply a hydrogen-containing gas into the pre-reaction chamber; a connection part configured to connect the pre-reaction chamber and the process chamber; a pressure adjusting part configured to adjust a pressure in the process chamber and the pre-reaction chamber to a pressure of less than an atmospheric pressure; and a control part configured to control the first heating source, the second heating source, the oxygen-containing gas supply system, the hydrogen-containing gas supply system, and the pressure adjusting part, so that the oxygen-containing gas and the hydrogen-containing gas are supplied into the pre-reaction chamber heated to the second temperature and having the pressure set to less than the atmospheric pressure, and a reaction is induced between both gases in the pre-reaction chamber to generate reactive species, and the reactive species are supplied into the process chamber in which a substrate heated to the first temperature is housed and the pressure is set to less than the atmospheric pressure, and processing is applied to the substrate by the reactive species, with the second temperature set to be not less than the first temperature at this time.