Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2007-11-27

2007-11-27

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Binder media

C428S848200

Reexamination Certificate

active

10868914

ABSTRACT:
A magnetic recording medium is provided, in which a high recording density is realized, and an electromagnetic transducing characteristic and an error rate are improved. The magnetic recording medium includes a non-magnetic layer containing a non-magnetic powder and a binder resin and a magnetic layer containing a ferromagnetic powder and a binder resin on one surface of a non-magnetic substrate, the non-magnetic powder contains a non-magnetic inorganic powder having an average particle diameter of 80 nm or less, the three-dimensional center surface average roughness of the magnetic layer surface is 3.0 nm or less in a region of 100 μm2based on a measurement with an atomic force microscope, and the area share held by asperities of at least ±5.0 nm with reference to the surface at an average height is 15 percent or less in a region of 100 μm2on the magnetic layer surface.

REFERENCES:
patent: 6579592 (2003-06-01), Matsubaguchi et al.
patent: 2001-331924 (2001-11-01), None
patent: 2002-312920 (2002-10-01), None
patent: 2002-367140 (2002-12-01), None

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