Patent ID: 7258892

Claim:
A method for controlling temperature in a deposition process using a deposition chamber and a heat source outside the deposition chamber, comprising: positioning a microfeature workpiece in the deposition chamber; monitoring a first temperature that is a reading of a first temperature sensor positioned outside the deposition chamber; monitoring a second temperature that is a reading of a second temperature sensor positioned in the deposition chamber, the first temperature sensor providing an indication of the heat transfer from the heat source to the deposition chamber; and increasing an internal temperature in the deposition chamber from an initial temperature to a deposition temperature during a temperature ramp-up in accordance with a ramp profile by (a) comparing a control temperature to a target temperature, the control temperature alternating between the first temperature and the second temperature during the temperature ramp-up, the target temperature being determined in accordance with the ramp profile, and (b) selectively delivering heat from the heat source to the deposition chamber in response to a result of the comparison.