Dynamic magnetic information storage or retrieval – Head – Coil
Patent
1992-02-24
1999-01-05
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Head
Coil
360126, G11B 517
Patent
active
058568980
ABSTRACT:
A thin film magnetic head has individual coils series-connected to one another and formed with three connecting terminals selectively connectable to an external driver to effect magnetic reading and writing operation. The magnetic head has 2n (n being an integer of not less than 1) spiral patterns formed by a selective plating method, n spiral patterns out of the 2n spiral patterns being connected in series so that a first connecting terminal and an intermediate connecting terminal are formed to thus give a first coil, the remaining n spiral patterns out of the 2n spiral patterns being connected in series so that one end thereof is connected to the intermediate connecting terminal and the other end serves as a second connecting terminal to thus give a second coil, wherein the 2n spiral patterns are formed on n layers and each layer has two spiral patterns, one of which is a component of the first coil and the other of which is a component of the second coil.
REFERENCES:
patent: 4295173 (1981-10-01), Romankiw et al.
patent: 4416056 (1983-11-01), Takahashi
patent: 4684438 (1987-08-01), Lazzari
patent: 4713711 (1987-12-01), Jones, Jr. et al.
patent: 5124870 (1992-06-01), Toyoda
Evans Jefferson
NEC Corporation
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