Invention Grant
- Patent Title: Magnetic recording medium and magnetic storage device
- Patent Title (中): 磁记录介质和磁存储装置
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Application No.: US12076004Application Date: 2008-03-12
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Publication No.: US08049993B2Publication Date: 2011-11-01
- Inventor: Satoshi Shirotori , Yoshiyuki Kamata , Kaori Kimura
- Applicant: Satoshi Shirotori , Yoshiyuki Kamata , Kaori Kimura
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Nixon & Vanderhye, P.C.
- Priority: JPP2007-128318 20070514
- Main IPC: G11B5/82
- IPC: G11B5/82 ; G11B5/72
Abstract:
A magnetic recording medium includes: a substrate; a recording layer that is formed on the substrate to have a grooved pattern; and a protection layer formed on the recording layer to fill in the grooved pattern, wherein the recording layer is defined to have a servo portion that retains servo data and a recording track portion that retains recording data, and wherein a first film thickness of the protection layer at the servo portion is larger than a second film thickness of the protection layer at the recording track portion by a thickness that is in a range from 1 nm to 10 nm.
Public/Granted literature
- US20080285174A1 Magnetic recording medium and magnetic storage device Public/Granted day:2008-11-20
Information query
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