Magnetic recording media having two magnetic layers; the first f

Details Magnetic recording media having two magnetic layers; the first f Magnetic recording media having two magnetic layers; the first f

1990-07-18

1991-08-27

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428329, 428336, 428694, 428900, 360134, G11B 2300

Patent

active

050432109

ABSTRACT:
A magnetic recording medium is used with a magnetic recording system in which a baseband recording signal is recorded on a magnetic recording medium and a surface-band recording signal with the effective recording depth being smaller than that of the baseband recording signal is then recorded thereon in superimposed relation. The non-magnetic substrate includes thereon a first magnetic layer and a second magnetic layer on that order, said second magnetic layer having a thickness substantially equal to the effective recording depth of said surface-band recording signal and a coercivity higher than that of said first magnetic layer.

REFERENCES:
patent: 4409281 (1983-10-01), Kitamoto et al.
patent: 4506000 (1985-03-01), Kubota et al.
patent: 4946740 (1990-08-01), Ono et al.

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