Patent ID: 8541283

Claim:
A method for forming a capacitor stack, the method comprising: forming a first electrode material above a substrate, wherein the first electrode material is a metal nitride; forming a first ZrO 2 material above the first electrode material, wherein the first ZrO 2 material further contains a first dopant, wherein the first dopant is present at a concentration of less than 10 atomic %; forming a second ZrO 2 material above the first ZrO 2 material, wherein the second ZrO 2 material further contains a second dopant, wherein the second dopant is present at a concentration of greater than 15 atomic %; forming a second electrode material on the second ZrO 2 material, wherein the second electrode material is a metal nitride; and annealing the capacitor stack, wherein the first ZrO 2 material is equal to or greater than 30% crystalline after the annealing and the second ZrO 2 material is less than 30% crystalline after the annealing.