Patent ID: 7304002

Claim:
A method for oxidation of a surface of an object to be processed in a single processing container which can contain a plurality of objects to be processed, said method characterized by performing said oxidation wherein: an oxidizing gas and H 2 gas are fed into said processing container, respectively, by separate gas feed locations, a distance between a region for accommodating the object to be processed in the processing container and each of said gas feed locations being 100 mm or more; active hydroxyl species and active oxygen species are mainly used in a vacuum atmosphere; a processing pressure is determined to be 133 Pa or below; a processing temperature is determined to be 400° C. or above; and H 2 concentration inside said processing container is within the range of from 5 to 33%; further wherein a plurality of stack-like silicon-layer projections are formed on a surface of said object to be processed, and a silicon nitride film is formed on upper surfaces of said projections.