Patent ID: 6011308
Filing Date: 2000-01-04
Classification: H01L

Abstract:
A semiconductor device comprising:a silicon substrate on which a semiconductor element is formed;a first insulating film formed on said silicon substrate;a barrier film formed on said first insulating film to prevent moisture from externally entering;a contact hole formed through said barrier film and said insulating film to a depth at which said silicon substrate is exposed;a protective film formed on a side surface of said contact hole to protect said first insulating film against etching which is performed to remove a spontaneous oxide film formed on a surface of said silicon substrate which is exposed on a bottom surface of said contact hole;a barrier metal continuously formed on at least the side and bottom surfaces of said contact hole and serving as a buffer conductor; andan interconnection metal buried in said contact hole on which said barrier metal is formed wherein said barrier film has a thickness of 50 .ANG. to 500 .ANG..