Invention Grant
US08623529B2 Method of producing a perpendicular magnetic recording medium and perpendicular magnetic recording medium 失效
制造垂直磁记录介质和垂直磁记录介质的方法

  • Patent Title: Method of producing a perpendicular magnetic recording medium and perpendicular magnetic recording medium
  • Patent Title (中): 制造垂直磁记录介质和垂直磁记录介质的方法
  • Application No.: US12935215
    Application Date: 2009-03-24
  • Publication No.: US08623529B2
    Publication Date: 2014-01-07
  • Inventor: Kouta Suzuki
  • Applicant: Kouta Suzuki
  • Applicant Address: SG Singapore
  • Assignee: WD Media (Singapore) Pte. Ltd.
  • Current Assignee: WD Media (Singapore) Pte. Ltd.
  • Current Assignee Address: SG Singapore
  • Priority: JP2008-088875 20080329
  • International Application: PCT/JP2009/055794 WO 20090324
  • International Announcement: WO2009/122963 WO 20091008
  • Main IPC: G11B5/66
  • IPC: G11B5/66
Method of producing a perpendicular magnetic recording medium and perpendicular magnetic recording medium
Abstract:
An object of the present invention is to provide a perpendicular magnetic recording medium including a suitable lubricating layer with sufficient durability, moisture resistance, and contamination resistance and also maintaining an R/W characteristic. In a typical structure of the present invention, a method of manufacturing a perpendicular magnetic recording medium 100 including a magnetic recording layer 122, a medium protective layer 126, and a lubricating layer 128 in this order on a base 110 includes: a CF bond density measuring step of measuring a CF bond density of a lubricant; and a lubricating layer forming step of forming a lubricating layer with the lubricant when the measured CF bond density is 2.0×1022 to 2.7×1022 atoms/cm3.
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