Patent ID: 6444551
Filing Date: 2002-09-03
Classification: H01L

Abstract:
A method of driving-in antimony into a wafer, including the steps of:A. loading a wafer into an annealing furnace/tool; the wafer having an area of implanted antimony ions; B. annealing the wafer a first time at a first temperature in the presence of only a first nitrogen gas flow rate; C. ramping-down the wafer from the first temperature to a second temperature in the presence of only an oxygen gas flow rate; D. maintaining the wafer in the presence of the oxygen gas flow rate in the absence of hydrogen at the second temperature; E. ramping-up the wafer from the second temperature to a third temperature in the presence of only the oxygen gas flow rate; and F. annealing the wafer a second time at the third temperature in the presence of only a second nitrogen gas flow rate to drive-in the antimony ions within the area of implanted antimony.