Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1991-03-22

1992-03-10

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428329, 428336, 428694, 428900, G11B 2300

Patent

active

050949047

ABSTRACT:
Disclosed is a magnetic recording medium comprising a non-magnetic support, and a first magnetic layer, a second magnetic layer and a third magnetic layer laminated on a non-magnetic support surface in this order, a total layer thickness of the second magnetic layer and the third magnetic layer of 0.7 .mu.m or less, and a coercive force of a ferromagnetic powder contained in the third magnetic layer being 1.2 to 2.5 times as strong as a coercive force of a ferromagnetic powder contained in the first magnetic layer.

REFERENCES:
patent: 4323621 (1982-04-01), Kober et al.
patent: 4784895 (1988-11-01), Mizuno et al.
patent: 4851287 (1989-07-01), Ogawa et al.
patent: 4992330 (1991-02-01), Kawahara et al.

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