Patent ID: 6280790
Filing Date: 2001-08-28
Classification: C23C,C30B

Abstract:
A rapid thermal processing (RTP) system for processing a substrate, the RTP system comprising:an edge ring to support the substrate in a processing chamber;a heater to direct radiation toward a first side of the substrate to be processed;a reflector having a surface facing a second side of the substrate to form a reflecting cavity therebetween, the reflector having one or more optical ports to receive radiation from inside the reflecting cavity;a fluid injector constructed to receive a flow of a purge fluid and to introduce a purge fluid at the surface of the reflector in a direction that is substantially parallel to the surface of the reflector to form a contaminant-entraining barrier between a source of the volatile contaminants and the one or more optical ports, thereby reducing the rate at which volatile contaminants contaminate the one or more optical ports; andan exhaust to remove purge fluid from the RTP system.