Patent ID: 6013134
Filing Date: 2000-01-11
Classification: C23C,C30B,Y10S

Abstract:
An apparatus for forming at least a portion of a semiconductor device comprising:an Ultra High Vacuum-Chemical Vapor Deposition (UHV-CVD) system for forming epitaxial silicon containing layers,a Low Pressure-Chemical Vapor deposition (LP-CVD) system for prebaking a plurality of wafers vertically oriented in a boat in a hydrogen containing gas and for forming epitaxial silicon containing layers, andan Ultra High Vacuum (UHV) transfer system coupled to said UHV-CVD system and said LP-CVD system for transferring said plurality of wafers in a boat to and from said UHV-CVD system and said LP-CVD system under UHV pressure, said Ultra High Vacuum (UHV) transfer system including a cold trap for trapping contaminants and a cryogenic pump for removing contaminants and a turbomolecular pump to provide a base pressure of 10.sup.-9 Torr.