Patent ID: 6352592
Filing Date: 2002-03-05
Classification: C23C

Abstract:
A protective shield for chemical vapor deposition systems comprising:a frame assembly including a pair of spaced end walls and a pair of side walls extending between and mounted to said end walls; and first and second injector shield bodies carried by said frame assembly, said injector shield bodies being positioned to define a first surface of said protective shield position able adjacent an injector, said injector shield bodies being spaced apart to define an injection port therebetween for the flow of reagents from the injector through said protective shield, said other shield bodies being contiguous to an associated one of said side walls; first and second other shield bodies carried by said frame assembly, said other shield bodies being spaced from said injector shield bodies and positioned to define a second surface of said protective shield opposite said first surface, to define outlet ports therebetween for the flow of reagents through said protective shield; said injector shield bodies and said other shield bodies each being formed of a single piece base having a continuous unit frame formed around the perimeter of the base, a perforated sheet carried by said continuous unit frame, a plenum partially defined between said base and said perforated sheet, and a gas delivery device for delivering an inert gas to said plenum at a flow rate such that the gas diffuses through said perforated sheet.