Patent ID: 9722176
Date: 2017-08-01
CPC Classifications: G11B,G11C,H01L,Y10T

Claim:
1. A method of manufacturing a magnetoresistive device that includes a magnetoresistive stack, comprising: etching a first portion of the magnetoresistive stack to produce an etched first portion of the magnetoresistive stack having sidewalls, where the first portion of the magnetoresistive stack includes a first dielectric layer corresponding to a tunnel barrier layer for the device and at least one layer of magnetic material; after etching the first portion of the magnetoresistive stack, oxidizing the sidewalls of the etched first portion of the magnetoresistive stack to encapsulate the sidewalls of the first portion of the magnetoresistive stack; and after oxidizing the sidewalls of the etched first portion of the magnetoresistive stack, etching a second portion of the magnetoresistive stack to produce an etched second portion of the magnetoresistive stack, wherein the second portion of the magnetoresistive stack includes a layer of antiferromagnetic material, and where the first portion of the magnetoresistive stack is over the second portion of the magnetoresistive stack.