Patent ID: 6335552
Filing Date: 2002-01-01
Classification: H01L

Abstract:
A semiconductor device comprising:a MOSFET including a pair of impurity diffused regions formed on both sides of a gate formed on a semiconductor substrate; a first insulation film formed above an upper surface and a side wall of the gate; a second insulation film formed on the first insulation film and the semiconductor substrate; a third insulation film formed on the second insulation film, the third insulation film having etching characteristics different from that of the second insulation film; a fourth insulation film formed on the third insulation film; a through-hole formed through the second insulation film, the third insulation film and the fourth insulation film, and opened above one of the impurity diffused regions; and a capacitor including a storage electrode formed along substantially all over a sidewall and a bottom of the through-hole, and electrically connected to said one of the impurity diffused regions, a dielectric film formed on the storage electrode, and an opposed electrode formed on the dielectric film, a diameter of the through-hole at the third insulation film being larger than that at the fourth insulation film.