Patent ID: 9627612
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A non-volatile memory device comprising: a bottom electrode embedded in an insulating substrate, said bottom electrode having a topmost surface that is coplanar with a topmost surface of said insulating substrate; a layer of dielectric material having a plurality of sidewall surfaces located within a via opening, said layer of dielectric material is located above said bottom electrode and said insulating substrate; a metal nitride spacer located along a bottom portion of each sidewall surface of said layer of dielectric material and in said via opening, said metal nitride spacer having a bottommost surface that present directly on a portion of said topmost surface of said bottom electrode, and a height that is less than a height of said dielectric layer; a phase change material structure present within said via opening and contacting at least a sidewall surface of said nitride spacer, said phase change material structure having a bottommost surface that is present directly on a remaining portion of said topmost surface of said bottom electrode; and a top electrode located on a topmost surface of said phase change material structure.