Patent ID: 8741712

Claim:
A method for forming a capacitor stack, the method comprising: forming a first layer on a substrate, wherein the first layer is operable as an electrode; forming a second layer on the first layer, wherein the second layer comprises a dielectric material, and wherein the second layer further comprises a dopant; forming a third layer on the second layer, wherein the third layer is operable as a blocking layer, wherein the third layer comprises a ternary metal oxide, and wherein the k value of the third layer is between 20 and 50 and the band gap of the third layer is greater than 4.8 eV; after forming the third layer, annealing the first layer, the second layer, and the third layer at a temperature of between about 300 C and 600 C in an oxidizing atmosphere including between about 0% O 2 and 20% O 2 , wherein the second layer is crystalline after annealing, wherein the third layer is amorphous after annealing; and after annealing the first layer, the second layer, and the third layer, forming a fourth layer on the third layer, wherein the fourth layer is operable as an electrode.