Vertical magnetic recording medium

Details Vertical magnetic recording medium Vertical magnetic recording medium

1984-12-04

1987-08-18

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428635, 428660, 428668, 428678, 428679, 428928, G11B 566

Patent

active

046877126

ABSTRACT:
A vertical magnetic recording medium comprises a non-magnetic substrate, a permalloy film consisting of plural permalloy layers separated by at least one non-magnetic layer placed therein, each of said plurality of permalloy layers being 2000 .ANG. or less thick, and a Co-Cr vertical magnetization film formed on the permalloy film directly or through another non-magnetic layer.

REFERENCES:
patent: 3350180 (1967-10-01), Croll
patent: 3479156 (1969-11-01), Ginder
patent: 3787237 (1974-01-01), Grunberg et al.
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 4550062 (1985-10-01), Takayama et al.
patent: 4621030 (1986-11-01), Vesaka et al.
Kazuo Kabayashi et al., "High Density Perpendicular Magnetic Recording on Rigid Disks", Fujitsu Sci. Tech. J. 19, 1, pp. 99-126, Mar. 1983.
Lodder et al., "R.F.-Sputtered Co-Cr Layers for Perpendicular Magnetic Recording", Thin Solid Films, 101, (1983), 61-73.

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