Patent ID: 8871621
Filing Date: 2014-10-28
Classification: H01L

Abstract:
1. A method to form a device, the method comprising forming a first layer, 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; annealing the second layer, wherein the annealing comprises one of a rapid thermal oxidation process or a plasma annealing process in an oxygen ambient; forming a third layer on the second layer, wherein the third layer comprises a non-stoichiometric composition of the dielectric material, wherein the third layer has a greater concentration of defects than the second layer; forming a fourth layer on the third layer, wherein the fourth layer is operable as an electrode, wherein the fourth layer comprises a material having a lower work function than a work function of the first layer; wherein the layers are operable to have a higher current flow when biased in a first polarity and a lower current flow when biased in a second polarity.