Patent ID: 6342435
Filing Date: 2002-01-29
Classification: H01L

Abstract:
A method for denuding, annealing and well drive of an implanted well in CMOS fabrication on a bare silicon wafer comprising:a) heating the wafer to a high temperature in the range from about 500Â° to 700Â° C. in an argon ambient environment; b) annealing and driving the well into the wafer in an argon/hydrogen ambient environment under high temperature in the range from about 1100Â° to 1250Â° C. wherein the argon/hydrogen ambient environment contains between 0.5 to 10% hydrogen; and c) oxidizing the wafer under high temperature in the range from about 800Â° to 1100Â° C. in an argon/oxygen ambient environment containing 1-20% oxygen.