Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-12-14

1988-08-23

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428469, 428694, 428900, 427130, 427131, 427132, 2041922, H01F 1008, H01F 1016

Patent

active

047660341

ABSTRACT:
A magnetic recording medium comprising a magnetic metal layer on a substrate. The uppermost layer of the magnetic metal layer consists essentially of a mixture of a magnetic metal such as Co or Co-Ni alloy and an oxide thereof. The surface portion of the magnetic layer consists essentially of a crystal phrase of said oxide and the ratio of oxide forming metallic atoms decreases continuously with the depth from the outer surface.

REFERENCES:
patent: 3829372 (1974-08-01), Heller
patent: 4239835 (1980-12-01), Iijima et al.
patent: 4323629 (1982-04-01), Kunieda et al.
patent: 4385098 (1983-05-01), Sugita et al.
patent: 4411953 (1983-10-01), Miyoshi et al.
patent: 4511635 (1985-04-01), Nagao et al.
patent: 4521482 (1985-06-01), Arai et al.
patent: 4554217 (1985-11-01), Grimm et al.
patent: 4596735 (1986-06-01), Noguchi et al.
patent: 4661418 (1987-04-01), Yanai et al.
Japio Abstract #83-208935, Regarding J58208935 of Dec. 5, 1983.

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