HEIZSYSTEM FÜR REAKTIONSKAMMER EINER CHEMISCHEN DAMPFNIEDERSCHLAGSVORRICHTUNG.

摘要

A heating system for use in chemical vapor deposition equipment of the type wherein a reactant gas is directed in a horizontal flow for depositing materials on a substrate which is supported in a reaction chamber on a susceptor which is rotatably driven for rotating the substrate about an axis which extends normally from its center. The heating system works in conjunction with a special heat sensing arrangement and includes an upper heating element assembly, a lower heating element assembly and a heat concentrator mechanism which interact to provide rapid temperature build-up at the beginning of a processing cycle, rapid temperature attenuation at the end of a processing cycle and a controlled flat temperature profile during the processig cycle.