Patent ID: 8956982
Filing Date: 2015-02-17
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a stacked film including at least a silicon oxide film by stacking a plurality of films formed of different materials; forming a hard mask pattern on the stacked film; forming a stacked film pattern of a predetermined shape by performing anisotropic etching on the stacked film by using the hard mask pattern as an etching mask; and removing the hard mask pattern, wherein the hard mask pattern is formed by stacking at least one first hard mask layer and at least one second hard mask layer, the first hard mask layer is formed of a material having a higher removability in wet etching than the second hard mask layer, the first hard mask layer is arranged immediately above the stacked film, the first hard mask layer is formed by stacking one or a plurality of films from among a silicon oxide film, a silicon nitride film, and an amorphous silicon film, and the second hard mask layer is formed by an amorphous boron film.