Patent ID: 9159585
Filing Date: 2015-10-13
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: (a) preparing a dummy substrate and a plurality of semiconductor substrates; (b) forming, on a back face of said dummy substrate and back faces of said plurality of semiconductor substrates, an inorganic film having such a thickness as to be resistant to a temperature of a thermal oxidizing treatment or a heat treatment and to sufficiently decrease an amount of oxidation or reducing gaseous species to reach said back faces of said dummy substrate and said plurality of semiconductor substrates; (c) disposing said dummy substrate and said plurality of semiconductor substrates in a lamination with surfaces of said inorganic film on said back faces of said dummy substrate and said plurality of semiconductor substrates facing a same direction at an interval from each other; and (d) carrying out a thermal oxidizing treatment or post annealing over said surfaces of said semiconductor substrates in an oxidation gas atmosphere or a reducing gas atmosphere after said steps (b) and (c), wherein said step (b) serves to form said inorganic film only on said back face of said dummy substrate.