Patent ID: 6916722

Claim:
A method for the creation of a metal capacitor, comprising: providing a substrate, semiconductor devices having been created in or over said substrate; creating a metal capacitor over the substrate, comprising: (i) depositing a first layer of capacitor plate material over the substrate, said first layer of capacitor plate material comprising copper diffusion barrier material TaN, TiN or Ta; (ii) depositing a layer of capacitor dielectric material over the first layer of capacitor plate material; (iii) depositing a second layer of capacitor plate material over the capacitor dielectric material, said second layer of capacitor plate material comprising copper diffusion barrier material TaN, TiN or Ta; and (iv) patterning said second layer of capacitor plate material, said layer of capacitor dielectric material and said first layer of capacitor plate material, thereby creating a metal capacitor; and creating spacers over sidewalls of the metal capacitor, wherein the spacers do not cover the second layer of capacitor plate material; and forming a conformal layer of etch stop material on the metal capacitor, wherein the spacers are located between the layer of etch stop material and the layer of capacitor dielectric material.