Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-02-26

1988-10-25

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

427131, 428329, 428336, 428694, 428900, G11B 570

Patent

active

047803657

ABSTRACT:
In a magnetic recording medium comprising a nonmagnetic support, a magnetic recording layer provided on one surface of said support and a back layer containing carbon black provided on another surface of said support, the improvement wherein said back layer has thickness of not larger than 0.6 .mu.m and contains an inorganic filler powder having a Mohs' scale of hardness of not less than 5, a mean particle diameter of smaller than the thickness of the back layer and not smaller than 1/5 of the thickness thereof, and the maximum particle diameter of not larger than 11/10 of the thickness of the back layer.

REFERENCES:
patent: 4582757 (1986-04-01), Miyoshi et al.
patent: 4618535 (1986-10-01), Nishimatsu et al.
patent: 4639389 (1987-01-01), Nishimatsu et al.

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