Patent ID: 8941088
Filing Date: 2015-01-27
Classification: G11C,H01L

Abstract:
1. A nonvolatile memory device comprising: a first conductive layer; a second conductive layer; a resistance change layer provided between the first conductive layer and the second conductive layer and having an electrical resistance configured to change with at least one of an applied electric field and a passed current, the resistance change layer having a lateral surface intersecting a plane perpendicular to a first direction from the first conductive layer toward the second conductive layer; and a lateral layer contacting the lateral surface of the resistance change layer, a second direction from the lateral layer toward the lateral surface of the resistance change layer being parallel to the plane and the first lateral layer having an oxygen concentration higher than an oxygen concentration in the first resistance change layer, the resistance change layer having a first portion, a second portion provided between the first portion and the second conductive layer, and a third portion provided between the first portion and the second portion, and a length of the third portion along the second direction being longer than a length of the second portion along the second direction.