Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1997-11-04

2000-03-07

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428328, 428694BB, 428900, G11B 568

Patent

active

060337591

ABSTRACT:
A tape-shaped magnetic recording medium for executing recording/reproducing processes at a running speed 2m/sec or higher is capable of exhibiting an excellent running characteristic and making it hard to cause print-through as well. This magnetic recording medium comprises a non-magnetic support, a magnetic layer formed on one surface of the non-magnetic support body and containing at least ferromagnetic metal powders and binding agent resin, and a backing layer formed on an opposite surface thereof and containing at least a carbon black and the binding agent resin. In this magnetic recording medium, a three-dimensional root mean square value roughness Rq of the surface of the backing layer is 200 nm or above through 280 nm or under, and a three-dimensional distortion degree Rsk of the surface thereof is -0.2 or under: ##EQU1## where f(x, y) is the roughness surface expressed on the unit of nm on the definition that an X-Y plane is the roughness mean surface, a recessed portion is negative and a protruded portion is positive, and S represents an area of a roughness measurement area on the X-Y plane.

REFERENCES:
patent: 5202810 (1993-04-01), Nakamura et al.
patent: 5607747 (1997-03-01), Law et al.
patent: 5737229 (1998-04-01), Bhushan
patent: 5820969 (1998-10-01), Satoh

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