Patent ID: 6337007
Filing Date: 2002-01-08
Classification: C25D,H01F

Abstract:
A method for preparing a soft magnetic thin film in the form of a cobalt-iron-nickel-carbon thin film consisting essentially of 40 to 70% by weight of cobalt, 20 to 40% by weight of iron, 5 to 20% by weight of nickel, and 0.02 to 0.1% by weight of carbon, and having a sulfur content up to 0.1% by weight,said method comprising the step of effecting electroplating in a plating bath containing a water-soluble cobalt salt, a water-soluble iron (II) salt, a water-soluble nickel salt, and an organic additive having an amino group within the molecule, which is at least one selected from the group consisting of diethylenetriamine, &agr;-alanine, &bgr;-alanine, glycine, glutamic acid and water-soluble salts thereof and being free of sulfur element, said plating bath being acidic.