Patent ID: 6462310
Filing Date: 2002-10-08
Classification: C23C,C30B,F27B,F27D,H01L

Abstract:
A heat treatment apparatus, comprising:a heating chamber having a heat source; a cooling chamber positioned adjacent to the heating chamber and including a cooling source; a wafer holder configured to move between the cooling chamber and the heating chamber through a passageway positioned between the heating source and the cooling source; and one or more shutters defining the size of the passageway and being movable between an open position where the wafer holder can pass through the passageway and an obstructing position which defines a passageway which is smaller than the passageway defined when the shutter is in the open position, wherein at least one of the one or more shutters includes two or more members positioned to define at least a portion of an air gap between adjacent members.