Patent ID: 9130167
Filing Date: 2015-09-08
Classification: H01L

Abstract:
1. A method of manufacturing a nonvolatile memory device, the method comprising: forming a first electrode; forming, above the first electrode, a metal oxide material layer comprising a first metal oxide; forming a mask above a portion of a main surface of the metal oxide material layer; forming, in a region of the metal oxide material layer not covered by the mask, a high oxygen concentration region comprising a second metal oxide having a degree of oxygen deficiency lower than a degree of oxygen deficiency of the first metal oxide, to form a first variable resistance layer including the metal oxide material layer in which the high oxygen concentration region is formed; removing the mask; forming, above the first variable resistance layer, a second variable resistance layer comprising a third metal oxide having a degree of oxygen deficiency lower than the degree of oxygen deficiency of the first metal oxide; and forming a second electrode above the second variable resistance layer.