Patent ID: 8742392
Filing Date: 2014-06-03
Classification: H01L

Abstract:
1. A multistate nonvolatile memory element comprising: a first layer operable as a first variable resistance layer; a second layer operable as a second variable resistance layer; and a third layer operable as a third variable resistance layer; wherein the first layer, the second layer, and the third layer are interconnected in series within the multistate nonvolatile memory element; wherein the first layer is configured to switch between a first low resistance state and a first high resistance state; wherein the second layer is configured to switch between a second low resistance state and a second high resistance state; wherein the third layer is configured to switch between a third low resistance state and a third high resistance state; wherein at least two of the first layer, the second layer, and the third layer comprise lanthanum oxide; and wherein the multistate nonvolatile memory element is switchable between at least four different stable resistive states.