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

Claim 0:
1. A method of manufacturing a magnetoresistive device, the method comprising:
forming a first electrode;
forming a free magnetic layer above the first electrode;
forming a first tunnel barrier layer above the first electrode;
forming a second tunnel barrier layer above the first tunnel barrier layer;
forming a second electrode above the second tunnel barrier layer, to form a stack including the first electrode, the free magnetic layer, the first tunnel barrier layer, the second tunnel barrier layer, and the second electrode;
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;
forming an encapsulation layer above the first surface; 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.