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:
Jul. 17, 2018
Filed:
Mar. 12, 2010
Sok-hyun Kong, Seoul, KR;
Hoo-san Lee, Osan-si, KR;
Sadayuki Watanabe, Tokyo, JP;
Shunji Takenoiri, Tokyo, JP;
Sok-hyun Kong, Seoul, KR;
Hoo-san Lee, Osan-si, KR;
Sadayuki Watanabe, Tokyo, JP;
Shunji Takenoiri, Tokyo, JP;
Seagate Technology LLC, Cupertino, CA (US);
Abstract
A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.