Method of making a magnetic core of a magnetic thin film head

Details Method of making a magnetic core of a magnetic thin film head Method of making a magnetic core of a magnetic thin film head

1994-03-21

1996-02-27

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal or alloy coating on...

205119, 205176, C25D 510, C25D 518

Patent

active

054945631

ABSTRACT:
A magnetic thin film head having a laminated structure includes a non-magnetic substrate, a lower magnetic layer deposited on the non-magnetic substrate, a magnetic gap layer overlying the lower magnetic layer, at least two insulating layers overlying the magnetic gap layer, at least one electrically conductive layer interposed between the insulating layers, and an upper magnetic layer overlying the insulating layers. A magnetic core of the magnetic thin film head is made up of the upper and lower magnetic layers, at least one of which includes a plurality of magnetically soft layers plated with a metal alloy and a plurality of modified layers each interposed between two adjoining magnetically soft layers. The modified layers function to magnetostatically separate the magnetically soft layers. Each of the modified layers is made by introducing, during electroplating, an anodic dissolution process wherein a surface to be plated is temporarily used as an anode.

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Tai-Ping Sun et al, Plating with Pulsed and Periodic-Reverse Current, Metal Finishing, May, 1979, pp. 33-38.
George W. Jernstedt, Better Deposits at Greater Speeds by PR Plating, Plating, Jul., 1948.
Romankiw et al., ECG Extended Abstract No. 300, pp. 430-431 180th Electrochemical Soc. Meeting (1989).

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