Patent ID: 6869499
Filing Date: 2005-03-22
Classification: B08B

Abstract:
1. A substrate processing apparatus comprising: a processing vessel; an ozone generator adapted to generate ozone gas; a steam generator adapted to generate water vapor; an ozone gas supplying path connecting the ozone generator to the processing vessel; a steam supplying path connecting the steam generator to the processing vessel; an air supplying path connected to the ozone gas supplying path to feed air into the processing vessel through the ozone gas supplying path; a first valve set including at least one valve and having a first state allowing ozone gas to be supplied from the ozone generator to the processing vessel through the ozone supplying path while preventing air from being supplied from the air supplying path to the processing vessel through the ozone gas supplying path, and a second state allowing air to be supplied from the air supplying path to the processing vessel through the ozone gas supplying path while preventing ozone gas from being supplied from the ozone generator to the processing vessel through the ozone gas supplying path; and a controller configured to control the first valve set so that the first valve set is in the first state when a substrate is processed in the processing vessel with ozone gas supplied from the ozone generator and water vapor supplied from the steam generator, and the first valve set is in the second state when the processing vessel is purged with air after the substrate has been processed with ozone gas and water vapor.