Patent ID: 6569238
Filing Date: 2003-05-27
Classification: C23C,C30B,Y10T

Abstract:
A method of depositing a semiconductor film, comprising the steps of:a) introducing source gases, containing aluminum and nitrogen, respectively into a reactor including a holder therein while heating the reactor before a wafer is loaded into the reactor, thereby forming a decontamination film, containing aluminum and nitrogen, on inner walls of the reactor and on parts of the holder exposed to the source gases; b) placing a wafer on part of the decontamination film that has covered the holder and then supplying Group III and V source gases onto the wafer, thereby depositing a Group III-V compound semiconductor film on the wafer and Group III-V reactants on the decontamination film; and c) after repeating step b) for multiple wafers, unloading the wafer, on which the Group III-V compound semiconductor film has been deposited, from the reactor, and then heating the reactor and the holder up to a temperature that is equal to or higher than a decomposition temperature of the Group III-V compound semiconductor film and equal to or lower than a decomposition temperature of the decontamination film, thereby removing by thermal decomposition excessive Group III-V reactants that have deposited themselves on the decontamination film, covering the inner wall of the reactor and the holder.