Patent ID: 8569728

Claim:
A nonvolatile memory device comprising: a first conductive layer; a second conductive layer; a first 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 or a passed current, the first resistance change layer having a lateral surface intersecting a plane perpendicular to a stacking direction from the first conductive layer toward the second conductive layer; and a first lateral layer contacting the lateral surface of the first resistance change layer, a direction from the first lateral layer toward the lateral surface of the first resistance change layer being perpendicular to the stacking direction, and the first lateral layer having an oxygen concentration higher than an oxygen concentration in the first resistance change layer, wherein the first resistance change layer includes AαMβOγ, and the first lateral layer includes Aα1Mβ1γ1 (γ1>γ), the A being a transition metal element, the M being a transition metal element, the O being oxygen.