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:
Oct. 18, 2016
Filed:
May. 28, 2013
Applicant:
Hgst Netherlands B.v., Amsterdam, NL;
Inventors:
Akemi Hirotsune, Odawara, JP;
Ikuko Takekuma, Yokohama, JP;
Hiroyuki Matsumoto, Chigasaki, JP;
Oleksandr Mosendz, San Jose, CA (US);
Assignee:
HGST Netherlands B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/73 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7325 (2013.01);
Abstract
A magnetic medium for perpendicular magnetic data recording having improved corrosion characteristics and reduced surface roughness. The magnetic medium includes an under-layer and a perpendicular magnetic recording layer formed over the under-layer. The under-layer can be formed of MgO and has an oxygen concentration that is greater at the perpendicular magnetic recording layer than it is away from the perpendicular magnetic recording layer.