Patent ID: 6863732
Filing Date: 2005-03-08
Classification: C23C,C30B,H01L

Abstract:
1. A heat treatment system comprising a reaction vessel, in which an object to be treated is carried and in which a heat treatment atmosphere at a predetermined temperature is formed, and a combustion system which is provided outside of said reaction vessel, wherein said combustion system allows hydrogen gas and oxygen gas, which pass through a first gas passage and a second gas passage: respectively, to be heated by heating means and to be fed into a combustion chamber to be burned therein to produce water vapor, and wherein gas is fed from said combustion chamber into said reaction vessel to carry out an oxidation process with respect to a silicon layer of said object to form an oxide film thereon, said heat treatment comprising: means for supplying one or more kinds of process gases, which are used fox carrying out a process other than said oxidation process using water vapor, to one of said first and second gas passages; and a ventilation resistance material, provided in a region heated by said heating means in one of said gas passages through which said one or more kinds of gases pass, for enhancing the beating efficiency of said gases, wherein said heating means is utilized for heating said process gases to a temperature, at which said process gases are allowed to react or activated, when said process other than said oxidation process using water vapor is carried out with respect to said object by said process gases.