Invention Grant
US08067104B2 Manufacturing method of magnetic recording medium, the magnetic recording medium, and magnetic recording and reproducing apparatus 有权
磁记录介质的制造方法,磁记录介质和磁记录和再现装置

  • 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
  • Application No.: US12272461
    Application Date: 2008-11-17
  • Publication No.: US08067104B2
    Publication Date: 2011-11-29
  • Inventor: Tsutomu TanakaKenji Sato
  • Applicant: Tsutomu TanakaKenji 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
Manufacturing method of magnetic recording medium, the magnetic recording medium, and magnetic recording and reproducing apparatus
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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