Patent ID: 11887643
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 15:
16. A method of forming a non-volatile memory structure, the method comprising:
forming a magnetic shield-containing material stack on a metal level containing first electrically conductive structures embedded in a first interlayer dielectric (ILD) material layer, wherein the magnetic shield-containing material stack includes a bottom magnetic shield material-containing layer sandwiched between a bottom cladding dielectric material layer and a top cladding dielectric material layer;
forming a plurality of openings in the magnetic shield-containing material stack, wherein each opening physically exposes a surface of one of the first electrically conductive structures embedded in the first ILD material layer;
forming a bottom sidewall spacer and a bottom electrode structure in each of the openings;
forming an MTJ-containing structure on top of each bottom electrode, wherein the MTJ-containing structure comprises a MTJ pillar and a top electrode;
forming a second ILD material layer laterally surrounding and on top of each of the MTJ-containing structures;
forming a top magnetic shield material-containing layer on a topmost surface of the second ILD material layer; and
forming a third ILD material layer on the top magnetic shield material-containing layer, wherein the third ILD material layer comprises second electrically conductive structures embedded therein, wherein each second electrically conductive structure contacts a surface of one of the MTJ-containing structures and is isolated from the top magnetic shield material-containing layer by a top sidewall spacer.