Patent ID: 6720600
Filing Date: 2004-04-13
Classification: H01L

Abstract:
A semiconductor device comprising:a first impurity diffusion region formed in a semiconductor substrate; a first insulating layer formed over the semiconductor substrate; a capacitor formed over the first insulating layer and having a lower electrode, a ferroelectric layer, and an upper electrode; an insulating capacitor protection layer made of material that is different from the first insulating layer, for covering an upper surface and a side surface of the capacitor; a second insulating layer formed over the capacitor protection layer and the first insulating layer, and made of material that is etched selectively from the capacitor protection layer; a first hole formed in the second insulating layer and positioned next to the side surface of the capacitor via the capacitor protection layer; and a first conductive plug formed in the first hole and connected electrically to the first impurity diffusion region.