Ultra high saturation moment soft magnetic thin film

Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic head

Reexamination Certificate

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C148S312000, C148S311000

Reexamination Certificate



A plated magnetic thin film of high saturation magnetization and low coercivity having the general form Co100-a-bFeaMb, where M can be Mo, Cr, W, Ni or Rh, which is suitable for use in magnetic recording heads that write on narrow trackwidth, high coercivity media. The plating method that produces the alloy includes four current application processes: direct current, pulsed current, pulse reversed current and conditioned pulse reversed current.

patent: 6120918 (2000-09-01), Osaka et al.
patent: 6538845 (2003-03-01), Watanabe et al.
Bozorth, “Ferromagnetism”, IEEE Press, 1993, pp. 190-209.
Lowenheim, Frederick, Electroplating, 1978, pp. 426-429.
“Atlas of Electrochemical Equilibria in Aqueous Solutions”, by Marc Pourbaix, Trans. from the French by J.A. Franklin, Nat'l Assoc. of Corrosion Eng., Houston, TX, USA, CEBELCOR, Brussels, p. 2.
Modern Electroplating, Fourth Ed., Edited by Schlesinger et al., A Wiley-Interscience Publication, John Wiley & Sons Inc., NY, Ch. 13, pp. 555-583.


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