Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1994-11-25

1996-03-05

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428336, 428694B, 428694BS, 428694BN, 428694BA, 428694BH, 428694BM, 428900, B32B 302, B32B 516, G11B 566

Patent

active

054966078

ABSTRACT:
Disclosed is a magnetic recording medium comprising at least two layers comprising at least one lower non-magnetic layer containing at least a non-magnetic particle and a binder on a non-magnetic support, and at least one upper magnetic layer containing at least a ferromagnetic particle and a binder on the lower non-magnetic layer, wherein a mean total thickness d of the upper magnetic layer is more than 0.01 .mu.m to less than 0.3 .mu.m, and a standard deviation .sigma. of the total thickness of the upper magnetic layer and the mean total thickness d of the upper magnetic layer satisfy the relationship of 0.05.ltoreq..sigma./d.ltoreq.0.5.

REFERENCES:
patent: 4367263 (1983-01-01), Kawahara
patent: 4649073 (1987-03-01), Suzuki
patent: 4741953 (1988-05-01), Katsuta
patent: 4794042 (1988-12-01), Kubota
patent: 4847147 (1989-07-01), Aonuma
patent: 4857388 (1989-08-01), Ogawa
patent: 4863793 (1989-09-01), Ogawa
patent: 4865924 (1989-09-01), Saito et al.
patent: 4963433 (1990-10-01), Ogawa et al.

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