Patent ID: 6436790
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A method of fabricating a semiconductor device comprising:performing a selective etching to form a trench in a semiconductor substrate by using first insulating film formed on said semiconductor substrate as a mask, said trench having a first width; performing a first deposition to form a first high-density plasma insulating film in said trench, over said first insulating film, said first high-density plasma insulating film having a second width that is smaller than said first width to thereby leave a space in said trench; performing a first heat treatment on said first high-density plasma insulating film after a portion of said first high-density plasma insulating film formed over said first insulating film is removed; performing a second deposition to form a second high-density plasma insulating film in said space; and performing a second heat treatment on said high-density plasma insulating film.