Patent ID: 7691204

Claim:
A substrate processing system comprising: a processing chamber adapted for the formation of films on the substrate, the chamber including a sidewall surrounding the periphery of the chamber; a substrate support disposed in the system and adapted to support the substrate; a top cover disposed above the substrate support to enclose the processing chamber, the top cover comprising a reflective surface for reflecting light back towards the substrate support and to create an enhanced emissivity effect for the substrate; a heating system disposed under the substrate support to heat the substrate to a temperature sufficient for film formation processes, wherein process heating of the substrate is performed exclusively by the heating system; a plurality of optical probes for collecting light emanating from the substrate, the reflective surface comprising a plurality of openings to provide respective fields of view of the substrate to the optical probes, the optical probes measuring the enhanced emissivity effect from the substrate; and an emissometer for measuring the actual emissivity of the substrate and which at least reduces the enhanced emissivity from the substrate, wherein a temperature of the substrate is calculated utilizing outputs from the emissometer and at least one of the optical probes.