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:
Sep. 25, 2007
Filed:
May. 28, 2004
Tatsuya Hinoue, Kanagawa, JP;
Tetsuya Kanbe, Kanagawa, JP;
Hiroyuki Suzuki, Kanagawa, JP;
Tomoo Yamamoto, Kanagawa, JP;
Tatsuya Hinoue, Kanagawa, JP;
Tetsuya Kanbe, Kanagawa, JP;
Hiroyuki Suzuki, Kanagawa, JP;
Tomoo Yamamoto, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands BV, Amsterdam, NL;
Abstract
A magnetic recording medium capable of attaining high in-plane recording density of 100 Mbits or more per 1 mmis provided. Magnetic recording medium is provided in which underlayers, a first magnetic layer, a first intermediate layer, a second magnetic layer, a second intermediate layer, a third magnetic layer, a protection layer and lubrication layer are formed in this order above a substrate. Each of the third magnetic layer and the second magnetic layer comprises a Co-based alloy containing at least Pt, Cr and B. The concentration of Pt contained in the second magnetic layer is not more than that in the third magnetic layer.