Magnetic recording medium having a magnetic layer comprising iro

Details Magnetic recording medium having a magnetic layer comprising iro Magnetic recording medium having a magnetic layer comprising iro

1996-01-24

1997-01-07

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428212, 428323, 428328, 428329, 428336, 428402, 428408, 4284259, 428522, 428694694BGBS, 428694BN, 428900, G11B 5708

Patent

active

055915124

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support, an intermediate layer which is formed on the non-magnetic support containing carbon black and non-magnetic particles other than carbon black, a particle size ratio between the carbon black and non-magnetic particles being from 1.0 to 4.0 in terms of a ratio of a diameter or a short axis size of the non-magnetic particles to a particle size of carbon black, and a magnetic layer which is formed on the intermediate layer and has a thickness of 0.2 to 1.0 .mu.m, in which magnetic layer a difference of an intensity at 102 mm.sup.-1 and that at 205 mm.sup.-1, in a frequency analysis of non-contact surface roughness is from 9 dB to 15 dB, in which a total thickness of the non-magnetic support, the intermediate layer and the magnetic layer is not greater than 13 .mu.m, which recording medium is excellent in electromagnetic conversion characteristics and durability.

REFERENCES:
patent: 4602359 (1986-07-01), Palmer
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patent: 4956220 (1990-09-01), Sueyoshi et al.
patent: 5084342 (1992-01-01), Isobe et al.
patent: 5258223 (1993-11-01), Inaba et al.
patent: 5342668 (1994-08-01), Echigo et al.
patent: 5398113 (1995-03-01), deGroot

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