Chemistry: electrical and wave energy – Processes and products
Patent
1976-12-30
1978-07-25
Mack, J. H.
Chemistry: electrical and wave energy
Processes and products
204123, 204239, 204273, 204274, C25D 356, C25C 124, C25D 2114
Patent
active
041027566
ABSTRACT:
A thin film of low magnetostriction Permalloy 80% nickel - 20% iron .+-. 1% is electroplated in a bath having a ratio of about 1.8:1 to 24:1 g/liter ratio of Ni to Fe ions with a plating current density from 10 ma/cm.sup.2 - 200 ma/cm.sup.2 when plating in sheet form or an Ni/Fe ratio of 25:1 to 85:1 with a current density of 2 ma/cm.sup.2 - 110 ma/cm.sup.2 when plating through a mask. The fluid in the system is constantly mixed, replenished with fresh iron, acid, and other reagents, is adjusted in temperature and subjected to a continuous laminar regime of mixing. Fresh solution is added to the bath from a reservoir where the above adjustments are made. The inlet for the fresh solution is at the lower end of the plating chamber and directed at a bath mixer which includes a slot through which the fresh solution is directed to optimize mixing in the plating chamber. Complexing agents are avoided. High speed plating is obtained with about 24.4 g/l of Ni.sup.++, 1.05 g/l of Fe.sup.++, 25 g/l of H.sub.3 BO.sub.3, 0.2 g/l of Na saccharin and a pH of 1.5 to 3.6.
REFERENCES:
patent: 3317410 (1967-05-01), Croll et al.
patent: 3434956 (1969-03-01), Glenn
patent: 3442774 (1969-05-01), Mehaute et al.
patent: 3649509 (1972-03-01), Morawetz et al.
Castellani Eugene Evans
Powers John Vincent
Romankiw Lubomyr Taras
International Business Machines - Corporation
Jones II Graham S.
Mack J. H.
Valentine D. R.
LandOfFree
Nickel-iron (80:20) alloy thin film electroplating method and el does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nickel-iron (80:20) alloy thin film electroplating method and el, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nickel-iron (80:20) alloy thin film electroplating method and el will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1419417