Invention Grant
- Patent Title: Manufacturing method of magnetic recording medium, the magnetic recording medium, and magnetic recording and reproducing apparatus
- Patent Title (中): 磁记录介质的制造方法,磁记录介质和磁记录和再现装置
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Application No.: US12272461Application Date: 2008-11-17
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Publication No.: US08067104B2Publication Date: 2011-11-29
- Inventor: Tsutomu Tanaka , Kenji Sato
- Applicant: Tsutomu Tanaka , Kenji Sato
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Priority: JP2008-118926 20080430
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A magnetic recording medium includes a substrate; and a recording film formed on the substrate and including a main magnetic film, the main magnetic film where a recording area and a guard area are formed by local ion doping, the guard area having saturation magnetization smaller than saturation magnetization of the recording area. A primary layer is provided at a substrate side of the main magnetic film. A main ingredient of the primary layer is at least one kind of atom selected from a group consisting of Cr, B, Mo, Al, Si, and C.
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