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:
Apr. 12, 2016
Filed:
Dec. 31, 2008
Erol Girt, San Jose, CA (US);
Dieter K. Weller, San Jose, CA (US);
Alexander Y. Dobin, Hauppauge, NY (US);
Bogdan F. Valcu, Fremont, CA (US);
Thomas F. Ambrose, Sewickley, PA (US);
Yingguo Peng, Pittsburgh, PA (US);
Yukiko A. Kubota, Pittsburgh, OR (US);
Abebe Hailu, San Jose, CA (US);
Erol Girt, San Jose, CA (US);
Dieter K. Weller, San Jose, CA (US);
Alexander Y. Dobin, Hauppauge, NY (US);
Bogdan F. Valcu, Fremont, CA (US);
Thomas F. Ambrose, Sewickley, PA (US);
Yingguo Peng, Pittsburgh, PA (US);
Yukiko A. Kubota, Pittsburgh, OR (US);
Abebe Hailu, San Jose, CA (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
A perpendicular magnetic recording layer of a magnetic recording medium includes a plurality of bit-patterned magnetic islands, wherein each of the plurality of islands overlay a soft magnetic under-layer. Each of the magnetic islands includes a first magnetic sub-layer adjacent a second magnetic sub-layer, wherein the first sub-layer has a relatively high magnetic anisotropy that is greater than a magnetic anisotropy of the second sub-layer. The magnetic recording layer further includes a third sub-layer, which extends to connect each of the plurality of islands. The third sub-layer may have a magnetic anisotropy that is less than that of the second sub-layer of each of the magnetic islands and/or may serve as an interlayer, extending between the first sub-layer and the soft magnetic under-layer of the recording medium, and having a structure to help to produce the greater anisotropy first magnetic sub-layer.