Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1983-11-03
1986-09-09
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428216, 428469, 428472, 428632, 428667, 428694, 428900, 428928, G11B 562, H01F 1000
Patent
active
046109110
ABSTRACT:
A thin film magnetic recording disc is provided wherein the magnetic layer is an alloy of cobalt and platinum disposed on a chromium layer. A barrier layer of chromium is formed on the cobalt-platinum film and a wear layer of an oxide of cobalt is provided on the barrier layer. The platinum content in the magnetic film is varied so as to provide a magnetic film with a desired coercivity which is significantly less dependent upon film thickness. This permits the cobalt-platinum film thickness to be adjusted to meet a wide range of recording system design parameters. The coercivity of the magnetic film may be determined primarily by the amount of platinum in the alloy and the saturation magnetization-thickness product of the film is determined primarily by the film thickness.
REFERENCES:
patent: 3138479 (1964-06-01), Foley
patent: 3150939 (1964-09-01), Weiner
patent: 3515606 (1966-03-01), Crowther
patent: 3520664 (1966-11-01), York
patent: 3787237 (1974-01-01), Grunberg et al.
patent: 3973920 (1976-08-01), Tadokoro et al.
patent: 4079169 (1978-03-01), Nigh et al.
patent: 4124736 (1978-11-01), Patel et al.
patent: 4154875 (1979-05-01), Yanagisawa et al.
patent: 4172171 (1979-10-01), Suzuki et al.
patent: 4245008 (1981-01-01), Michaelsen et al.
patent: 4254189 (1981-03-01), Fisher
patent: 4271232 (1981-06-01), Heiman et al.
patent: 4323629 (1982-04-01), Kunieda et al.
patent: 4426265 (1984-01-01), Brunsh et al.
patent: 4438066 (1984-03-01), Aboaf et al.
patent: 4456661 (1984-06-01), Yamamoto
Natarajan Bangalore R.
Opfer James E.
Atkinson William M.
Hewlett--Packard Company
Lesmes George F.
Murray Leslie G.
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