Invention Application
- Patent Title: MAGNETIC RECORDING MEDIUM AND MAGNETIC SIGNAL REPRODUCING DEVICE
- Patent Title (中): 磁记录介质和磁信号再现装置
-
Application No.: US15084828Application Date: 2016-03-30
-
Publication No.: US20160293196A1Publication Date: 2016-10-06
- Inventor: Masahide SATO
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2015-073958 20150331
- Main IPC: G11B5/706
- IPC: G11B5/706 ; G11B5/714 ; G11B5/127 ; G11B5/708 ; G11B5/73

Abstract:
The magnetic recording medium has a nonmagnetic layer containing nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer containing ferromagnetic powder and binder on the nonmagnetic layer, wherein a thickness of the nonmagnetic layer ranges from 0.10 to 0.60 μm; and the magnetic layer further contains nonmagnetic filler satisfying equation 1 below and having a Vickers hardness of less than or equal to 122 N/mm2: 1. 150≦D2/D1≦1.300 Equation 1: wherein, in equation 1, D1 is a value, with a unit of μm, obtained from equation 2 below: D 1 = 6 ρ · S , Equation 2 D2 is an average particle size, with a unit of μm, of the nonmagnetic filler, and in equation 2, ρ denotes a density, with a unit of g/cm3, of the nonmagnetic filler and S denotes a specific surface area, with a unit of m2/g, of the nonmagnetic filler.
Public/Granted literature
- US09704524B2 Magnetic recording medium and magnetic signal reproducing device Public/Granted day:2017-07-11
Information query
IPC分类: