Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-07-01

1986-11-25

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, 428331, 428694, 428695, 428900, G11B 570, G11B 572, B32B 516

Patent

active

046248927

ABSTRACT:
A magnetic recording medium comprising a magnetic recording layer formed on one major surface of a non-magnetic substrate and a topcoat layer formed on the magnetic layer is characterized in that the topcoat layer contains a submicron particulate pigment observable under an electron microscope to have a linear distribution density of 10 to 1,000 per linear 100 .mu.m and a particle size of less than 200 .ANG. whereby the topcoat layer has a surface roughness R20 of not more than 400 .ANG..

REFERENCES:
patent: 4309482 (1982-01-01), Suzuki et al.
patent: 4425404 (1984-01-01), Suzuki et al.
patent: 4443514 (1984-04-01), Yamamoto et al.

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