Invention Grant
- Patent Title: Magnetic recording medium and method for producing the same
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Application No.: US15857593Application Date: 2017-12-28
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Publication No.: US10170145B2Publication Date: 2019-01-01
- Inventor: Shinji Uchida , Hitoshi Nakata , Tomohiro Moriya , Akira Furuta , Hirohisa Oyama , Takehito Shimatsu
- Applicant: FUJI ELECTRIC CO., LTD.
- Applicant Address: JP Kawasaki-Shi, Kanagawa
- Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee: FUJI ELECTRIC CO., LTD.
- Current Assignee Address: JP Kawasaki-Shi, Kanagawa
- Agency: Rabin & Berdo, P.C.
- Priority: JP2016-003596 20160112
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/73 ; G11B5/65 ; G11B5/738 ; G11B5/851 ; G11B5/84

Abstract:
A magnetic recording medium is provided that includes, in the order recited, a substrate; a first seed layer; a second seed layer containing ZnO; a third seed layer containing MgO; and a magnetic recording layer containing an ordered alloy. The first seed layer contains Ru and at least one material selected from the group consisting of oxides, carbides, and nitrides. Employing seed layers enables the magnetic recording medium to be a perpendicular magnetic recording medium by having the magnetic recording layer contain an ordered alloy suitable for perpendicular magnetic recording. Recording density is improved thereby while ensuring required thermal stability. Further, the invention achieves an increased thickness of the magnetic layer and a reduced grain size.
Public/Granted literature
- US20180122416A1 MAGNETIC RECORDING MEDIUM AND METHOD FOR PRODUCING THE SAME Public/Granted day:2018-05-03
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