Method for manufacturing semiconductor device

Abstract

According to one embodiment, a method for manufacturing a semiconductor device, includes: and forming, on an upper face of a silicon substrate, a plurality of concave portions extending in a first direction, performing, in a gas that contains fluorine or a fluoride, plasma processing on the silicon substrate in which the concave portions are formed. The method further includes performing, in a gas that contains hydrogen, thermal processing on the silicon substrate after completion of performing the plasma processing; forming an insulating film on an inner face of the concave portions after completion of performing the thermal processing; and forming a conductive film on the insulating film.

Dependencies are inferred from the claim text.