Patent ID: 8748884
Filing Date: 2014-06-10
Classification: H01L

Abstract:
1. A nonvolatile memory device, comprising: a substrate; a first insulating layer on the substrate and including a first opening therein; a lower electrode in the first opening and protruding from a surface of the first insulating layer outside the first opening; an electrode passivation pattern on a sidewall of the lower electrode that protrudes from the surface of the first insulating layer; a second insulating layer on the first insulating layer and including a second opening therein at least partially exposing the lower electrode, wherein the electrode passivation pattern comprises a material having an etching selectivity to that of the second insulating layer; and a variable resistance material layer extending into the second opening to contact the lower electrode, wherein the electrode passivation pattern electrically separates the sidewall of the lower electrode from the variable resistance material layer.