Patent ID: 8519371
Filing Date: 2013-08-27
Classification: H01L

Abstract:
1. A nonvolatile memory device comprising: a substrate; a first electrode provided on the substrate; a second electrode crossing on the first electrode; and a memory portion provided between the first electrode and the second electrode and including a resistance change material and an insulator in contact with the resistance change material within the memory portion; said resistance change material and said insulator only extending laterally over a cross surface of the first electrode and the second electrode opposed to each other by the crossing, both of an area of a first memory portion surface of the memory portion in contact with the first electrode and an area of a second memory portion surface of the memory portion in contact with the second electrode being smaller than an area of a cross surface of the first electrode and the second electrode opposed to each other by the crossing, and the memory portion has a tapered pillar shape extending along a stacking direction from the first electrode toward the second electrode.