Patent ID: 7452125
Filing Date: 2008-11-18
Classification: G01J

Abstract:
1. A system for calibrating a pyrometer, comprising: a rotating disk reactor including a wafer carrier placed therein, said rotating disk reactor being operative to rotate said wafer carrier about an axis at a predetermined rate; a semiconductor calibration target mounted to said wafer carrier remote from said axis, said calibration target having a first surface, including a eutectic-forming metal region laid thereon and a non-eutectic semiconductor region outside of and contiguous with said metal region, said eutectic-forming metal region having a known melting point and said semiconductor region comprised of the semiconductor forming the calibration target; a reflectometer optically coupled to said metal region by way of a reflectometer field of view, said reflectometer connected to at least one light source and at least one photodetector within said reflectometer field of view, said reflectometer field of view and said calibration target in relative periodic motion, said reflectometer thereby obtaining reflectivity data from said calibration target; a pyrometer optically coupled to said at least one non-eutectic semiconductor region of said calibration wafer by way of a pyrometer field of view, said pyrometer connected to said at least one photodetector within said pyrometer field of view, said pyrometer field of view and said calibration target in relative periodic motion, said pyrometer thereby obtaining pyrometry data related to the temperature of the calibration target through said at least one photodetector; and, a processor electrically coupled to said pyrometer and said reflectometer for identifying reflectivity data related to said known melting point of said eutectic-forming metal region, and for calibrating said pyrometer based on said reflectivity data and said pyrometry data related to the temperature of the calibration semiconductor target.