Patent ID: 11921172
Assignee: NVE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A method of manufacturing a synthetic antiferromagnet biased magnetoresistive sensor, the method comprising:
depositing a reference structure that includes:
depositing a seed or adhesion layer directly on a substrate;
depositing a reference antiferromagnet layer on the seed layer;
depositing a reference pinned ferromagnetic layer upon the reference antiferromagnetic layer;
depositing a synthetic antiferromagnet non-magnetic spacer upon the reference pinned ferromagnetic layer; and
depositing a reference ferromagnet upon the synthetic antiferromagnet non-magnetic spacer;

depositing a spacer layer upon the reference structure;
depositing a sensing ferromagnetic layer on the spacer layer;
depositing an exchange-tuning spacer on the sensing ferromagnetic layer;
depositing a sense biasing ferromagnetic layer on the exchange-tuning spacer;
depositing a sense non-magnetic spacer on the sense biasing ferromagnetic layer;
depositing a biasing pinned magnetic structure on the sense non-magnetic spacer; and
depositing a biasing pinned magnetic structure on the sense non-magnetic spacer; and
depositing a capping layer on the biasing pinned magnetic structure,
wherein the reference ferromagnetic layer and the sense biasing ferromagnetic layer are pinned in in-plane directions that are parallel to one another.