Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1983-12-16

1986-06-10

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428611, 428668, 428928, 360134, G11B 566

Patent

active

045942960

ABSTRACT:
A magnetic recording medium which comprises a magnetic layer formed on a substrate and comprising Co, or Co and one to three elements selected from the group consisting of Ni, Cr and O, wherein, when the magnetic layer is divided equally into four portions in the direction of the thickness of the magnetic layer, the density of the portion located farthest from the substrate is greater by at least 20% than the average density of three other portions.

REFERENCES:
patent: 4124736 (1978-11-01), Patel et al.
patent: 4162350 (1979-07-01), Yanagisawa et al.
patent: 4293621 (1981-10-01), Togami
patent: 4307156 (1981-12-01), Yanagisawa
patent: 4323629 (1982-04-01), Kunieda et al.
patent: 4371590 (1983-02-01), Izumi et al.
patent: 4385098 (1983-05-01), Sugita et al.
patent: 4387136 (1983-06-01), Saito et al.
patent: 4410583 (1983-10-01), Hanaoka
patent: 4418126 (1983-11-01), Izumi et al.

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