Patent ID: 8349696

Claim:
A method for forming a capacitor stack, the method comprising: forming a first electrode layer on a substrate; forming a dielectric layer on the first electrode layer; and forming a bilayer second electrode structure on the dielectric layer, wherein forming the bilayer second electrode structure comprises forming a bottom layer on the dielectric layer, subjecting the first electrode layer, the dielectric layer, and the bottom layer of the bilayer second electrode structure to a post metallization anneal (PMA) treatment, wherein the PMA treatment crystallizes the bottom layer of the bilayer second electrode structure and anneals defects in the dielectric layer and an interface formed by the dielectric layer and the bottom layer of the bilayer second electrode structure, and forming a top layer on the bottom layer of the bilayer electrode structure after subjecting the first electrode layer, the dielectric layer, and the bottom layer of the bilayer second electrode structure to the PMA treatment.