Patent ID: 8765570

Claim:
A method for forming a capacitor stack, the method comprising: forming a first electrode material above a substrate; forming a first dielectric material above the first electrode material, the first dielectric layer being amorphous after forming; forming a second dielectric material above the first dielectric material; forming a second electrode material above the second dielectric material, the second electrode material comprising a metal oxide having a rutile-like crystal structure; and annealing the capacitor stack, the annealing causing the second dielectric material to crystallize to a high k-value rutile crystalline phase based on the rutile-like crystal structure of the second electrode material; wherein the first dielectric material remains amorphous after the annealing, and wherein the first dielectric material comprises one of barium-strontium-titanate (BST), hafnium silicate, niobium oxide, lead-zirconium-titanate (PZT), a bilayer of silicon oxide and silicon nitride, silicon oxy-nitride, strontium titanate (STO), tantalum oxide, or combinations thereof