Patent ID: 6124793
Filing Date: 2000-09-26
Classification: C23C,H01L

Abstract:
A system for calibrating the control board of a resistive temperature probe which is utilized in the operation of a heated wafer chuck, the system comprising:a switch having multiple, mutually exclusive positions, the switch electrically coupleable between a resistive temperature probe and a control board for said probe and having a first position for electrically connecting the probe to the control board when coupled therebetween;a first resistance network electrically coupled to said switch, the first resistance network having an electrical resistance simulating the resistance of the resistive temperature probe in a non-operational state, a second position of the switch electrically connecting the first resistance network to the control board for simulating the temperature probe in the non-operational state;a second resistance network electrically coupled to said switch, the second resistance network having an electrical resistance simulating the resistance of the resistive temperature probe in an operational state , a third position of the switch electrically connecting the second resistance network to the control board for simulating the temperature probe in the operational state;the system operable for selectively disconnecting the probe from the control board and substituting a selected resistance network for simulating the probe for calibration of the control board without the probe.