Invention Grant
- Patent Title: Magnetic recording medium and manufacturing method thereof
- Patent Title (中): 磁记录介质及其制造方法
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Application No.: US13175485Application Date: 2011-07-01
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Publication No.: US08507116B2Publication Date: 2013-08-13
- Inventor: Takeshi Iwasaki , Kaori Kimura , Yoshiyuki Kamata , Masatoshi Sakurai
- Applicant: Takeshi Iwasaki , Kaori Kimura , Yoshiyuki Kamata , Masatoshi Sakurai
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Knobbe, Martens, Olsen & Bear, LLP
- Priority: JP2010-171136 20100729
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
According to one embodiment, a magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, a magnetic recording layer, and a protective layer, wherein the magnetic recording layer is provided with a pattern including recording portions and non-recording portions, the non-recording portions have a composition that is equal to a composition obtained by demagnetizing the recording portions, the non-recording portions contain at least one metal element selected from the group consisting of vanadium and zirconium and at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen, and the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen is contained in the non-recording portions at a higher content than the content of the at least one element selected from the group consisting of nitrogen, carbon, boron and oxygen in the recording portions.
Public/Granted literature
- US20120028076A1 MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF Public/Granted day:2012-02-02
Information query
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