Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1990-08-24

1991-08-27

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428694, 428900, G11B 2300

Patent

active

050432125

ABSTRACT:
A magnetic recording medium having plural magnetic layers is disclosed. The magnetic recording medium comprises a first magnetic layer containing magnetic powder having a coercive force of less than 800 Oe and a BET value of less than 45 m.sup.2 /g, a second magnetic layer containing magnetic powder having a coercive force of not less than 800 Oe and a BET value of less than 45 m.sup.2 /g and a third magnetic layer containing magnetic powder having a coercive force of not less than 800 Oe and a BET value of not less than 45 m.sup.2 /g, in this order.

REFERENCES:
patent: 4409281 (1983-10-01), Kitamoto et al.
patent: 4847147 (1989-07-01), Aonuma et al.
patent: 4851289 (1989-07-01), Ogawa et al.
patent: 4873129 (1989-10-01), Fukke

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