Patent ID: 6518201
Filing Date: 2003-02-11
Classification: H01L,Y10S

Abstract:
A method for fabricating a semiconductor integrated circuit device comprising the steps of:(a) preparing moisture from oxygen and hydrogen by use of a catalyst at a temperature of 500Â° C. or below in a moisture preparing unit; (b) keeping the thus prepared moisture in a gaseous state and feeding it to a single wafer heat treatment chamber; and (c) forming a silicon oxide film, which serves as a gate insulating film of a field effect transistor, over a silicon surface of a first main surface of a wafer in an oxidative atmosphere, which contains said moisture and also contains oxygen gas as a main component and in which a ratio of a partial pressure of the fed moisture to the total atmospheric pressure is in a range of 0.1% to 40%, in the moisture-fed single wafer heat treatment chamber by thermal oxidation treatment wherein the first main surface of the wafer is heated to 700Â° C. or over by means of a lamp.