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. 04, 2013
Filed:
Aug. 31, 2010
Kai-chieh Chang, Pleasanton, CA (US);
LI Tang, Fremont, CA (US);
Shanghsien S. Rou, Fremont, CA (US);
Connie Chunling Liu, San Jose, CA (US);
Bogdan Florin Valcu, Fremont, CA (US);
Wen Jiang, Fremont, CA (US);
Tao Zhang, Fremont, CA (US);
Kai-Chieh Chang, Pleasanton, CA (US);
Li Tang, Fremont, CA (US);
Shanghsien S. Rou, Fremont, CA (US);
Connie Chunling Liu, San Jose, CA (US);
Bogdan Florin Valcu, Fremont, CA (US);
Wen Jiang, Fremont, CA (US);
Tao Zhang, Fremont, CA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer. In some embodiments, the negative magnetic anisotropy layer includes a thickness of less than or equal to about 3 nm.