Patent ID: 8888360
Filing Date: 2014-11-18
Classification: G01J

Abstract:
1. A method of in-situ pyrometer calibration for a wafer treatment reactor, comprising: (a) positioning a calibrating pyrometer at a first calibrating position so that the calibrating pyrometer is adapted to receive radiation from a first portion of a wafer support element at a first radial distance from a rotational axis of the wafer support element; (b) heating the reactor until the reactor reaches a pyrometer calibration temperature; (c) rotating the support element about the rotational axis; and (d) while the support element is rotating about the rotational axis, obtaining first operating temperature measurements from a first operating pyrometer installed at a first operating position so that the first operating pyrometer is adapted to receive radiation from the first portion of the wafer support element at the first radial distance from the rotational axis of the wafer support element; and (e) while the support element is rotating about the rotational axis, obtaining first calibrating temperature measurements from the calibration pyrometer.