Patent ID: 8946668
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A semiconductor device comprising a resistive change element between a first wiring and a second wiring, which are arranged in a vertical direction, with an interlayer insulation film being interposed on a semiconductor substrate, wherein the resistive change element comprises: an upper electrode electrically connected to the second wiring; a lower electrode electrically connected to the first wiring; and a resistive change element film interposed between the upper and lower electrodes, the resistive change element film being made of a metal oxide, wherein the second wiring comprises a plug, wherein the plug comprises a metal layer that constitutes the second wiring that is buried inside the upper electrode of the resistive change element, which is buried while covering an outermost side surface and a bottom surface of the plug, wherein the metal layer that constitutes the second wiring comprises a barrier metal and a copper film, and wherein the upper electrode covering the bottom of the plug is in contact with an upper surface of the resistive change element film that is spaced apart from a side surface of the resistive change element film.