Patent ID: 6016383
Filing Date: 2000-01-18
Classification: C23C,C30B,F27B,F27D,G01J,H01L,H02G

Abstract:
An apparatus to measure a temperature across a substrate during rapid thermal processing of the substrate, comprising:a process chamber having a window;a plurality of radiant energy sources disposed outside of said chamber and positioned adjacent to said window, said radiant energy sources having a central longitudinal axis that extends in a substantially perpendicular direction relative to said window;reflectors associated with said radiant energy sources to direct radiant energy through said window to radiate predetermined regions of the substrate in said chamber with a pattern of radiation intensity, said reflectors extending along a major portion of said longitudinal axis of said radiant energy sources, and said radiant energy sources and said reflectors positioned so that a portion of one of said predetermined regions radiated by one of said radiant energy sources overlaps a portion of a predetermined region radiated by another one of said radiant energy sources to provide a radiation intensity across the substrate that is dependent upon the intensity of each of said radiant energy sources;an infrared camera located outside of said chamber to image the substrate to sense infrared radiation emitted from the different regions of the substrate and to output a signal representative thereof; anda computer to receive said signal and programmed to control the intensity of said radiant energy sources to thereby control the temperature of the different regions of the substrate.