Invention Grant
- Patent Title: Perpendicular magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus
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Application No.: US15070733Application Date: 2016-03-15
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Publication No.: US09911448B2Publication Date: 2018-03-06
- Inventor: Takeshi Iwasaki , Kazutaka Takizawa , Akira Watanabe , Kaori Kimura , Akihiko Takeo
- Applicant: KABUSHIKI KAISHA TOSHIBA
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Tokyo
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Priority: JP2012-006248 20120116
- Main IPC: G11B5/84
- IPC: G11B5/84 ; G11B5/855 ; G11B5/65

Abstract:
A perpendicular magnetic recording medium according to an embodiment includes a substrate and perpendicular magnetic recording layer. The perpendicular magnetic recording layer includes a recording portion and non-recording portion. The recording portion has patterns regularly arranged in the longitudinal direction, and includes magnetic layers containing Fe or Co and Pt as main components, and at least one additive component selected from Ti, Si, Al, and W. The non-recording portion includes oxide layers formed by oxidizing the side surfaces of the magnetic layers, and nonmagnetic layers formed between the oxide layers.
Public/Granted literature
Information query
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