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:
Jun. 23, 2015
Filed:
Nov. 30, 2012
Western Digital (Fremont), Llc, Fremont, CA (US);
Yuankai Zheng, Fremont, CA (US);
Qunwen Leng, Palo Alto, CA (US);
Cheng-Han Yang, Mountain View, CA (US);
Western Digital (Fremont), LLC, Fremont, CA (US);
Abstract
A method is provided for providing a magnetic recording transducer having a pinning layer with high pinning field stability. A bottom structure comprising a substrate, a magnetic shield above the substrate, a magnetic seed layer above the shield, a nonmagnetic spacer layer above the magnetic seed layer, and a layer of antiferromagnetic (AFM) material on the nonmagnetic spacer layer is provided. The bottom structure is heated to a temperature of at least 373 Kelvin (K) and then the bottom structure is cooled until the temperature of the structure is reduced to less than 293K. A pinned layer is deposited on the AFM layer, a nonmagnetic spacer is provided on the pinned layer, and a read sensor fabricated above the nonmagnetic spacer. In one embodiment, cooling the structure comprises reducing the temperature of the structure by at least 100K in less than 25 minutes.