Patent ID: 7993698

Claim:
A method for temperature-controlled ion implantation, the method comprising the steps of: performing a first ion implantation process on a first wafer; recording a first temperature profile during the first ion implantation process, the first temperature profile representative of a change in temperature of the first wafer over time from a start time to an end time of the first ion implantation process; measuring a first dopant profile of the first wafer resulting from the first ion implantation process; determining, based on the first temperature profile and the first dopant profile, a second variable temperature profile for a second wafer, the second variable temperature profile representative of a non-zero change in temperature of the second wafer over time from a start time to an end time of a second ion implantation process, such that the second ion implantation process on the second wafer produces a second dopant profile of the second wafer substantially similar to the first dopant profile; performing the second ion implantation process on the second wafer; monitoring a temperature of the second wafer during the second ion implantation process; and adjusting the temperature of the second wafer to cause the second wafer to exhibit the second temperature profile.