Patent ID: 6432831
Filing Date: 2002-08-13
Classification: C23C,H01J

Abstract:
A method of processing a substrate in a reaction chamber wherein a gas distribution system includes a support member defining a baffle chamber therein, the support member having a first gas supply opening into a central area of the baffle chamber and a second gas supply opening into a peripheral area of the baffle chamber, a baffle arrangement located in the baffle chamber such that gas from the first gas supply passes through first openings in baffle arrangement and gas from the second gas supply passes through second openings in the baffle arrangement, and a showerhead supported by the support member such that the gas passing through the first and second openings mixes together and passes through third openings in the showerhead, the method comprising:supplying a semiconductor substrate to the reaction chamber; supplying process gas to the first and second gas supplies such that the process gas flows through the baffle arrangement without mixing until the process gas passes through the baffle arrangement after which the mixed process gas passes through the showerhead and into an interior of the reaction chamber; and processing the semiconductor substrate with the process gas passing through the showerhead.