Patent ID: 6559499
Filing Date: 2003-05-06
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate with an active device region formed thereon; at least one layer of dielectric material formed on the device active region; a metal interconnect region formed over the device active region; and a layer of dielectric material on the metal interconnect region, the layer of dielectric material having a trench therein, wherein the bottom of the trench communicates with the metal interconnect region, wherein sidewall spacers of an insulating barrier material and a metal forming the capacitor bottom plate are inside the trench and the capacitor bottom plate decreases in thickness as the capacitor bottom plate extends upward in the trench and wherein a capacitor is formed in the trench, the capacitor comprising the bottom plate, a capacitor dielectric, and a capacitor top plate, wherein at least a portion of the capacitor dielectric and the capacitor top plate are between the sidewall spacers in the trench.