The present disclosure provides methods and systems for controlling
temperature. The method has particular utility in connection with
controlling temperature in a deposition process, e.g., in depositing a
heat-reflective material via CVD. One exemplary embodiment provides a
method that involves monitoring a first temperature outside the
deposition chamber and a second temperature inside the deposition
chamber. An internal temperature in the deposition chamber can be
increased in accordance with a ramp profile by (a) comparing a control
temperature to a target temperature, and (b) selectively delivering heat
to the deposition chamber in response to a result of the comparison. The
target temperature may be determined in accordance with the ramp profile,
but the control temperature in one implementation alternates between the
first temperature and the second temperature.