Patent ID: 9123889
Filing Date: 2015-09-01
Classification: G11C,H01L

Abstract:
1. A resistance change nonvolatile memory device, comprising: a first wiring; an interlayer insulating layer formed over the first wiring; and a second wiring formed over the interlayer insulating layer, wherein the interlayer insulating layer is interposed between the first wiring and the second wiring and includes a hole having a width not greater than a width of the first wiring, wherein the resistance change nonvolatile memory device further comprises: wherein the lower electrode, the resistance change layer, and the upper electrode are formed inside the hole, wherein the first wiring includes copper, while the lower electrode includes at least one metal selected from the group constituting of ruthenium, tungsten, cobalt, platinum, gold, rhodium, iridium, and palladium, wherein the resistance change layer comprises: wherein a lower surface of the upper electrode is formed on a top surface of the first portion, and wherein a distance between a top edge of the second portion and the lower electrode is greater than a distance between the lower surface of the upper electrode and the lower electrode.