Patent ID: 6169032
Filing Date: 2001-01-02
Classification: C23C,H01L

Abstract:
A method of forming a thin film on an object to be processed in a reduced process chamber by chemical Vapor Deposition (CVD), comprising the steps of: introducing arbitrarily chosen gases into the process chamber having an object to be processed loaded therein before a raw material gas is introduced, to set an inner pressure to a film-formation pressure determined in accordance with film-formation conditions; introducing a raw material gas for use in film formation into the process chamber; performing the film formation for a time determined in accordance with the film-formation conditions; and terminating only a raw material gas supply, followed by terminating supply of the arbitrarily chosen gases while flow rates thereof are gradually reduced, after completion of film formation process, thereby preventing a rapid pressure change of the process chamber and preventing a rapid temperature change of the semiconductor substrate due to the rapid pressure change.