Perpendicular magnetic recording medium

Details Perpendicular magnetic recording medium Perpendicular magnetic recording medium

1983-09-30

1985-10-01

Lesmes, George F.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428694, 428216, 428472, 428900, G11B 2504

Patent

active

045445915

ABSTRACT:
In a perpendicular magnetic recording medium comprising a high permeability film and a perpendicular magnetization film which are laminated on a non-magnetic substrate, a perpendicular magnetic recording medium is provided wherein a permanent magnet film is further sandwiched between the non-magnetic substrate and the high permeability film, thereby eliminating a spike noise.

REFERENCES:
patent: 3515606 (1970-06-01), Crowther
patent: 3929604 (1975-12-01), Shirahata et al.
patent: 4075384 (1978-02-01), Suzuki et al.
patent: 4210946 (1980-07-01), Iwasaki et al.
patent: 4277809 (1981-07-01), Fisher et al.
patent: 4391874 (1983-07-01), Yamamoto et al.
patent: 4410590 (1983-10-01), Kawashara et al.
patent: 4438066 (1984-03-01), Aboaf et al.
patent: 4454195 (1984-06-01), Fukuda et al.

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