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. 26, 2018
Filed:
May. 12, 2016
Applicant:
Western Digital (Fremont), Llc, Fremont, CA (US);
Inventors:
Yuankai Zheng, Fremont, CA (US);
Qunwen Leng, Palo Alto, CA (US);
Assignee:
Western Digital (Fremont), LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 10/10 (2006.01); G11B 5/127 (2006.01); G11B 5/31 (2006.01); H01F 10/13 (2006.01); C23C 14/14 (2006.01); H01F 10/32 (2006.01);
U.S. Cl.
CPC ...
G11B 5/1272 (2013.01); C23C 14/14 (2013.01); G11B 5/3143 (2013.01); H01F 10/135 (2013.01); H01F 10/3218 (2013.01); H01F 10/3268 (2013.01); H01F 10/3254 (2013.01);
Abstract
Apparatuses and methods of recording read heads with a multi-layer anti-ferromagnetic (AFM) layer are provided. The AFM layer has gradient Manganese (Mn) compositions. A multi-layer AFM layer comprises a plurality of sub-layers having different Mn compositions. An upper sub-layer has a higher Mn composition than an lower sub-layer. Different types of gases may be used to deposit each sub-layer and the flow of each gas may be adjusted.