Patent ID: 6501178
Filing Date: 2002-12-31
Classification: H01L,Y10S

Abstract:
A semiconductor device comprising:a first conductive film formed on a semiconductor substrate; a second conductive film formed on said first conductive film with a first insulating film interposed therebetween; a third conductive film formed on said second conductive film with a second insulating film interposed therebetween, said third conductive film being formed of polysilicon; and a columnar connecting portion penetrating at least said second insulating film and said first insulating film from said third conductive film so as to reach said first conductive film and the semiconductor substrate, said columnar connecting portion being formed of polysilicon integral with and as a part of said third conductive film; said second conductive film being brought into contact with said columnar connecting portion at its end surface and the thickness of said second conductive film being less than that of said third conductive film.