Patent ID: 11925122
Assignee: EVERSPIN TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. A method of manufacturing a magnetoresistive device from a stack including (i) a free magnetic layer, (ii) a first electrode positioned below the free magnetic layer, (iii) a second electrode positioned above the free magnetic layer, (iv) a first tunnel barrier layer disposed between the free magnetic layer and the first electrode, and (v) a second tunnel barrier layer disposed between the free magnetic layer and the second electrode, the method comprising:
etching at least a first portion of the stack above the first electrode, wherein etching at least a first portion of the stack exposes a first surface above the first electrode and forms sidewalls above the first electrode;
depositing an encapsulating material above the first surface;
oxidizing the encapsulating material to form an encapsulation layer; and
etching a portion of the encapsulation layer above the first surface and an exposed portion of the free magnetic layer to expose the first tunnel barrier layer.