Electrodepositing CoNiFe alloys for thin film heads

Details Electrodepositing CoNiFe alloys for thin film heads Electrodepositing CoNiFe alloys for thin film heads

1986-04-21

1987-04-28

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 356

Patent

active

046612165

ABSTRACT:
A bath for electroplating a high cobalt magnetic alloy material suitable for fabrication of thin film heads. The ternary cobalt-nickel-iron (CoNiFe) alloy electroplating bath composition produces a high cobalt magnetic thin film having high saturation magnetization, a magnetostriction coefficient that is substantially zero, and low coercivity. A process suitable for deposition of the soft magnetic material provides a thin film head where 4.pi.Ms is higher than 14K gauss, Hc is less than 20e, 1-10 MHZ permeability is near 1000, and has a near zero magnetostriction.

REFERENCES:
Journal of Applied Physics, vol. 38, pp. 3409-3410, (1967), "Non-Magnetostrictive Compositions of Fe-Ni-Co Films", by C. H. Tolman.

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