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

Claim 14:
15. 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 and below the second electrode;
forming an encapsulation layer above the first surface, wherein forming the encapsulation layer above the first surface includes forming the encapsulation layer on the sidewalls and in contact with the first surface; and
after the encapsulation layer is formed, 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.