Patent ID: 6740853
Filing Date: 2004-05-25
Classification: C23C,H01L

Abstract:
A heater for heating a substrate in a processing gas within a processing reactor, said heater comprising:a first quartz plate having an external face and an internal face opposing said external face, a second quartz plate having an internal face, said second quartz plate being disposed proximate and generally parallel to said first quartz plate with the internal face of said first quartz plate substantially adjacent the internal face of said second quartz plate, a first heater element; a first channel formed in at least one of the internal faces of said first and second quartz plates of a configuration commensurate with that of said first heater element for receiving said first heater element therein; a first seal sealing together said first and second quartz plates with said first heater element secured there between, to form a gas-tight chamber (a) between said first and second quartz plates and (b) around the first channel; and a first protective gas duct for admitting gas of a predetermined composition and pressure into the first channel independent of the composition and pressure of the processing gas existing externally to the heater.