Patent ID: 6599815
Filing Date: 2003-07-29
Classification: H01L

Abstract:
A method of processing semiconductor wafers to produce a denuded zone by heating and cooling the wafer in a chamber having a heat source and an annular wafer support, said method comprising:placing a semiconductor wafer in a chamber having an interior, a heat source operatively associated with the interior and an annular wafer support positioned in the interior; heating the wafer in the chamber interior to a temperature of at least about 1175Â° C. and thereafter cooling said wafer at a rate of at least about 10Â° C./sec. until the wafer has a temperature of less than about 850Â° C. whereby during which cooling, said wafer is resting on the annular support whereby only a peripheral portion of the wafer is in contact with said support, for producing denuded zone.