Patent ID: 6770144
Filing Date: 2004-08-03
Classification: C23C,H01L

Abstract:
A multideposition sub-atmospheric chemical vapor deposition (SACVD) reactor comprising:a substrate processing chamber; a carbon susceptor adapted to hold a subtrate in said substrate processing chamber during a SACVD operation, wherein said carbon susceptor is coated by a polysilicon film to protect it against said cleaning gases, wherein said polysilicon coating comprises a bottom polysilicon coating and a top polysilicon coating of different thicknesses, and said bottom polysilicon coating has a thickness of about 4 &mgr;m and said top polysilicon coating has a thickness of about 1.5 &mgr;m; a gas distribution system including appropriate valves, gas supply lines and other equipment adapted to flow gases into said substrate processing chamber, wherein said gases include dielectric and non-dielectric forming gases and in-situ cleaning gases that are aggressive to carbon; a heating system to heat said susceptor to an adequate deposition temperature; a pressurization system adapted to set a pressure level within said substrate processing chamber; and a controller coupled to said gas distribution system and pressurization system for directing operation of said SACVD reactor.