Patent ID: 8815106
Filing Date: 2014-08-26
Classification: H01J,H01L

Abstract:
1. A method of supplying an etching gas, the method comprising: supplying a first etching gas used in an etching process into a processing container; and supplying a second etching gas used in the etching process into the processing container, wherein, in a first switching where the first etching gas is switched to the second etching gas a first predetermined amount of a first common gas, which is needed as an etching gas in a process before the first switching and is not needed as an etching gas in a process after the first switching, is continuously supplied into the processing container, and in a second switching where the second etching gas is switched to the first etching gas, a second predetermined amount of a second common gas, which is needed as an etching gas in a process before the second switching and is not needed as an etching gas in a process after the second switching, is continuously supplied into the processing container.