Patent ID: 6800139
Filing Date: 2004-10-05
Classification: C23C

Abstract:
A film depositing apparatus for depositing a film on an object to be processed, the film deposition apparatus comprising:a process chamber accommodating the object therein; process gas supplying means for supplying process gases including a raw material gas and an oxidant gas; evacuating means for evacuating the process gases from said process chamber so as to maintain said process chamber to be at a predetermined vacuum; process gas introducing means for introducing the process gases supplied from said process gas supplying means into said process chamber; pressure detecting means for detecting a pressure of each of the raw material gas and the oxidant gas in said process gas introducing means; dilution gas adding means for adding a dilution gas to one of the raw material gas and the oxidant gas; and dilution gas amount control means for controlling an amount of the dilution gas to be added based on the pressure detected by said pressure detecting means so that the pressures of the raw material gas and the oxidant gas in said process gas introducing means are substantially equal to each other, wherein said process gas introducing means is configured and arranged to inject the process gases toward an entire surface of the object, a gas injecting surface from which the process eases are injected being divided into an inner zone covering a center portion of the object and an outer zone surrounding the inner zone, and wherein said process gas supplying means selectively supplies the process gases to said process gas introducing means so that the raw material gas is separately injected from said inner zone and said outer zone and the oxidant gas is separately injected from said inner zone and said outer zone.