Chemistry: electrical and wave energy – Processes and products
Patent
1982-12-20
1984-09-18
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
C25D 356
Patent
active
044722486
ABSTRACT:
A magnetic recording medium having a magnetizable metallic thin-film layer of perpendicular anisotropy can be produced at commercially viable production rates by electrodepositing cobalt, hypophosphite, and preferably also nickel ions at a plating bath temperature of 50.degree.-80.degree. C. and a plating current density of at least 20 mA/cm.sup.2.
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Chen, T. and Cavalotti, P., "Electroplated Cobalt Film for Perpendicular Magnetic Recording Medium", Applied Phys. Lett., 7/82.
Sato, M. and Hoshino, Y., "Magnetic Properties of Electrodeposited Co-Ni-P Recording Films", Denki Kagaku, 1967 (Japan).
Bate, G., "A Brief Review of High-Coercivity Thin Films for Digital Magnetic Recording", Journal of Applied Physics, Mar., 1966.
Koretzky, H., "Electrodeposited Magnetic Films: A Critical Survey", in Electrochemistry, Pergamon Press, 1965 at pp. 417, 429-433.
Judge, J. S., et al., "Flexible Recording Surfaces of Electrodeposited Cobalt-Nickel-Phosphorous", Plating, Apr., 1966, pp. 44-50.
Bate, G. and Speliotis, D. E., "Hard Magnetic Films of Co-Ni-P", Journal of Applied Physics, vol. 34, No. 4, (Part 2), pp. 1073-1074, Apr. 1963.
Kaplan G. L.
Little D. B.
Minnesota Mining and Manufacturing Company
Sell D. M.
Smith J. A.
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