The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2013
Filed:
Jun. 04, 2012
Yuankai Zheng, Fremont, CA (US);
Qunwen Leng, Palo Alto, CA (US);
Mahendra Pakala, Fremont, CA (US);
Zhitao Diao, Fremont, CA (US);
Christian Kaiser, San Jose, CA (US);
Cheng-han Yang, Moutain View, CA (US);
Yuankai Zheng, Fremont, CA (US);
Qunwen Leng, Palo Alto, CA (US);
Mahendra Pakala, Fremont, CA (US);
Zhitao Diao, Fremont, CA (US);
Christian Kaiser, San Jose, CA (US);
Cheng-Han Yang, Moutain View, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A magnetic sensor configured to reside in proximity to a recording medium during use having a high spin polarization reference layer stack above AFM layers. The reference layer stack comprises a first boron-free ferromagnetic layer above the AFM coupling layer; a magnetic coupling layer on and in contact with the first boron-free ferromagnetic layer; a second ferromagnetic layer comprising boron deposited on and contact with the magnetic coupling layer; and a boron-free third ferromagnetic layer on and in contact the second ferromagnetic layer. A barrier layer is deposited on and in contact with the boron-free third ferromagnetic layer. In one aspect of the invention, the magnetic coupling layer may comprise at least one of Ta, Ti, or Hf. A process for providing the magnetic sensor is also provided.