Patent ID: 6188099
Filing Date: 2001-02-13
Classification: H01L

Abstract:
A semiconductor device comprising:a conductive layer formed on a main surface of a semiconductor substrate;an insulating film formed on the main surface of said semiconductor substrate including said conductive layer, said insulating film formed with a contact hole extending from an upper surface of said insulating film to said conductive layer;a columnar conductive body portion formed in said contact hole and filling said contact hole up to a level lower than the upper surface of the insulating film;a lower electrode formed on the upper surface of said insulating film and said columnar conductive body portion, said lower electrode further comprising:a first conductive body portion formed on the upper surface of said insulating film;an opening portion formed in said first conductive body portion, extending from an upper surface of said conductive body portion to the upper surface of said insulating film and exposing an upper surface of said columnar conductive body portion, wherein said opening portion has a width greater than a width of said contact hole and exposes a portion of upper surface of said insulating film adjoining said contact hole; anda second conductive portion formed on the upper surface of said first conductive portion with an interface therebetween, the side surfaces of said opening portion, the exposed portion of the upper surface of said insulating film, and the upper surface of said columnar conductive body portion, for electrically connecting said columnar conductive body portion and said first conductive body portion; andan upper electrode including a third conductive body portion formed on a surface of said lower electrode with a dielectric film therebetween.