Patent ID: 6569780
Filing Date: 2003-05-27
Classification: H01L,Y10S

Abstract:
A method for fabricating a semiconductor integrated circuit device, comprising the steps of:(a) synthesizing moisture, at a first temperature, from oxygen gas and hydrogen gas by use of a catalyst in a moisture synthesizing portion, to produce synthesized moisture; (b) transferring the synthesized moisture into a heat treatment chamber of an oxidation furnace, to form a wet oxidative atmosphere over a first major surface of a wafer inside the chamber, while keeping the moisture in a gaseous state; and (c) performing thermal oxidation treatment of a silicon member over the first major surface of the wafer, in the wet oxidative atmosphere in the heat treatment chamber, by heating the first major surface of the wafer up to a second temperature higher than the first temperature, wherein introduction of oxygen gas into the moisture synthesizing portion is started at a first time period, prior to the start of introduction of oxygen gas and hydrogen gas into the moisture synthesizing portion for starting the synthesis of moisture.