Electro-deposition of a nonmagnetic conductive coating for memor

Details Electro-deposition of a nonmagnetic conductive coating for memor Electro-deposition of a nonmagnetic conductive coating for memor

1977-09-16

1982-08-17

Pianalto, Bernard D.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

204 40, 428665, 428680, 428935, B32B 1500

Patent

active

043450075

ABSTRACT:
Plated memory wire is provided with a nickel-phosphorous alloy protective coating through an electro-deposition process. The protective coating is electrically conductive, nonmagnetic and has a bright surface amenable to good solder bonding. The memory function is provided by a Saccharin-type nickel-iron-cobalt film and the protective overcoating is applied by submerging the wire in an electrolyte bath composed of 360 g/l of nickel sulfate (NiSO.sub.4.6H.sub.2 O), 80 g/l of sodium sulfate (Na.sub.2 SO.sub.4), 60 g/l of sodium hypophosphite (NaH.sub.2 PO.sub.2.H.sub.2 O) and 25 g/l of boric acid (H.sub.3 BO.sub.3). The static bath is maintained at room temperature and the wire is moved through it at approximately eighteen inches per minute. An electro-deposition current density of from 20 to 80 ma./cm..sup.2 of plating area is employed.

REFERENCES:
patent: 3354059 (1967-11-01), Koretzky
patent: 3531322 (1970-09-01), Kefalas et al.
patent: 3637471 (1972-01-01), Faulkner
patent: 3691032 (1972-09-01), Luborsky et al.
patent: 3704211 (1972-11-01), Phillips
patent: 4108739 (1978-08-01), Tadokoro et al.

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