Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1990-09-11

1993-06-01

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428333, 428694B, 428900, B32B 310, B32B 516, G11B 566

Patent

active

052158039

ABSTRACT:
There is disclosed a magnetic recording medium having improved output levels of electromagnetic conversion properties and reduced rubbing noise. The recording medium copmprises an uppermost magnetic layer and a lower magnetic layer, wherein a thickness of the uppermost layer is 0.1 to 1.0 .mu.m; a coercive force of the total magnetic layers is 690 to 770 Oe; and a surface waviness of the uppermost layer is 0.015 .mu.m or less.

REFERENCES:
patent: 4735844 (1988-04-01), Ide et al.
patent: 4828903 (1989-05-01), Ejiri et al.
patent: 4847147 (1989-07-01), Aonuma et al.
patent: 4992330 (1991-02-01), Kawahara et al.
patent: 5035856 (1991-07-01), Koyama et al.

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