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:
Aug. 12, 2014
Filed:
Oct. 17, 2006
Hiroyuki Matsumoto, Kanagawa-ken, JP;
Mitsuhiro Shoda, Kanagawa, JP;
Reiko Arai, Kanagawa, JP;
Yuzuru Hosoe, Tokyo, JP;
Katsumi Mabuchi, Ibaraki, JP;
Hiroyuki Matsumoto, Kanagawa-ken, JP;
Mitsuhiro Shoda, Kanagawa, JP;
Reiko Arai, Kanagawa, JP;
Yuzuru Hosoe, Tokyo, JP;
Katsumi Mabuchi, Ibaraki, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.