Patent ID: 6572705
Filing Date: 2003-06-03
Classification: C23C,C30B

Abstract:
An apparatus for growing a solid-state thin film onto a substrate by subjecting the substrate to alternately repeated surface reactions of at least two different vapor-phase reactants, the apparatus comprising:a reaction space defining a volume, including a reaction chamber configured to support the substrate therein; at least one inflow channel alternately communicating the at least two reactants to the reaction space; a reactant outflow channel communicating reaction products and excess amounts of reactants from the reaction space; a pump communicating with the outflow channel to evacuate gases from the reaction space; and controls set to deliver the at least two reactants through the at least one inflow channel to the reaction space in alternate pulses with a fixed interval between successive reactant pulses during which purge gas is provided to the reaction space, and wherein the controls are set for the pump to remove greater than two reaction space volumes of purge gas from the reaction space during each fixed interval.