Patent ID: 6802712
Filing Date: 2004-10-12
Classification: C23C,C30B,H01L

Abstract:
In a reactor having a gas inlet for feeding at least one reactant gas, a gas outlet for exhausting the at least one reactant gas, a longitudinal axis defined between the gas inlet and the gas outlet, a reactant gas flow direction defined parallel to the longitudinal axis, and a plurality of reactor zones defined along the longitudinal axis, and being used for a process involving one of deposition and oxidation of a plurality of semiconductor wafers being held perpendicularly to the reactant gas flow direction, a heating system adapted to change a temperature within the reactor during the process, comprising:a plurality of heating elements corresponding to the plurality of reactor zones, each of said plurality of heating elements corresponding to a given one of the plurality of reactor zones being adapted to perform a temperature behavior according to a temperature profile versus time, a heating element corresponding to a zone nearest the gas inlet being adapted to perform a temperature behavior according to a temperature profile rising during the process, and a heating element corresponding to a zone nearest the gas outlet being adapted to perform a temperature behavior according to a temperature profile falling during the process.