Patent ID: 8681530
Filing Date: 2014-03-25
Classification: G11C,H01L

Abstract:
1. A nonvolatile memory element, comprising: a first layer operable as a first electrode; a second layer operable as a second electrode; a third layer disposed between the first layer and the second layer, wherein the third layer is operable as a variable resistance layer; a fourth layer disposed between the first layer and the third layer, wherein the fourth layer is a resistive layer, and comprises a material selected from the group of titanium, tantalum, aluminum, zirconium, hafnium or silicon, and the fourth layer is not operable as a variable resistance layer: and a current steering device disposed between the first layer and the second layer, wherein the current steering device preferentially allows current to flow from the second layer to the first layer: wherein the current steering device has a first impedance and the fourth layer has a second impedance, and the second impedance is between about 75% and about 125% of the first impedance.