Perpendicular magnetic recording medium and manufacturing method

Details Perpendicular magnetic recording medium and manufacturing method Perpendicular magnetic recording medium and manufacturing method

1983-07-13

1986-11-04

Sheehan, John P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Foil or filament smaller than 6 mils

428611, 428621, 428678, 428679, 428680, 428681, 428928, 360134, 360135, B21C 3700

Patent

active

046210300

ABSTRACT:
A perpendicular magnetic recording medium free from spike noise having a high permeability magnetic material film, an antiferromagnetic material film and a perpendicularly oriented magnetic material film formed on a substrate in this order. Another high permeability magnetic material film may be formed between the antiferromagnetic material film and the perpendicularly oriented magnetic material film. During the formation of the antiferromagnetic material film, a magnetic field is applied in a direction of a track width.

REFERENCES:
patent: 3582912 (1971-06-01), Valin et al.
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4224381 (1980-09-01), Patel et al.

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