Invention Grant
US07901805B2 Magnetic recording medium and method of producing the same 有权
磁记录介质及其制造方法

  • Patent Title: Magnetic recording medium and method of producing the same
  • Patent Title (中): 磁记录介质及其制造方法
  • Application No.: US11729842
    Application Date: 2007-03-30
  • Publication No.: US07901805B2
    Publication Date: 2011-03-08
  • Inventor: Koji Naoe
  • Applicant: Koji Naoe
  • Applicant Address: JP Tokyo
  • Assignee: FUJIFILM Corporation
  • Current Assignee: FUJIFILM Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Sughrue Mion, PLLC
  • Priority: JP2006-094924 20060330
  • Main IPC: G11B5/706
  • IPC: G11B5/706
Magnetic recording medium and method of producing the same
Abstract:
A magnetic recording medium, which comprises: a nonmagnetic support; and a magnetic layer comprising a ferromagnetic powder and a binder, wherein an average surface roughness (Ra) at a center of a surface of the magnetic layer measured by using an atomic force microscope (AFM) is 2 nm or less, the maximum height (Rmax) thereof is 50 nm or less, and an arithmetic average of phase difference between a drive signal and a response signal of a probe measured with the atomic force microscope in a tapping mode is from 2 to 20°, and a method of producing the same.
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