Invention Grant
- Patent Title: Magnetic recording medium
- Patent Title (中): 磁记录介质
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Application No.: US13965140Application Date: 2013-08-12
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Publication No.: US09076479B2Publication Date: 2015-07-07
- Inventor: Tomonori Katano , Akiyasu Kumagai , Katsumi Taniguchi , Hiromi Ono , Narumi Sato , Shinji Uchida
- Applicant: FUJI ELECTRIC CO., LTD.
- Applicant Address: JP Kawasaki-Shi
- Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee Address: JP Kawasaki-Shi
- Agency: Rabin & Berdo, P.C.
- Priority: JP2012-190414 20120830
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/725 ; G11B5/72 ; G11B5/84

Abstract:
A magnetic recording medium includes a substrate having sequentially formed thereon (a) a magnetic layer; (b) a protective layer having a thickness ranging from 1.0 nm to 2.5 nm and being composed of an amorphous metal layer having a thickness of at least 0.3 nm, the amorphous metal layer being composed of a metal selected from the group consisting of Si, Al, Ge, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W that is in an amorphous state; (c) a carbon layer formed on the amorphous metal layer and having a thickness of at least 0.3 nm, the carbon layer including amorphous carbon; and (d) a lubricating layer, wherein the carbon layer includes nitrogen atoms in a surface thereof in which a ratio of number of nitrogen atoms to total number of carbon atoms, nitrogen atoms, and oxygen atoms is 14 atomic % or less.
Public/Granted literature
- US20140065445A1 MAGNETIC RECORDING MEDIUM Public/Granted day:2014-03-06
Information query
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