Patent ID: 7666737

Claim:
A method of forming a metal-insulator-metal capacitor, comprising: providing a semiconductor substrate having a first dielectric layer formed thereon; forming a stack dielectric structure overlying said first dielectric layer by alternately depositing a plurality of second dielectric layers and a plurality of third dielectric layers; forming an opening in said stack dielectric structure to expose a portion of said first dielectric layer; performing a wet etch process to remove relatively-large portions of said second dielectric layers and relatively-small portions of said third dielectric layers, thereby forming a plurality of lateral recesses in said second dielectric layers along sidewalls of said opening; forming an isolation layer extending along the sidewalls and bottoms of said lateral recesses and said opening; forming a bottom electrode layer on said isolation layer; forming a capacitor dielectric layer on said bottom electrode layer; and forming a top electrode layer on said capacitor dielectric layer.