Dynamic magnetic information storage or retrieval – Head – Coil
Patent
1986-04-14
1988-11-22
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Coil
360125, 360126, 360110, 336175, 336184, G11B 517, G11B 531, G11B 5127, H01F 1706
Patent
active
047870036
ABSTRACT:
A magnetic head integrally assembled with a step-up transformer. The magnetic head portion is formed on a lower substrate by a thin film technology and the number of turns of the signal winding is 1 or a value near 1. The transformer portion mainly comprises a transformer magnetic circuit which is formed by the lower substrate and upper substrate. A one-turn primary coil of a thin film formed over the lower substrate and a secondary coil by a bulk wire are arranged so as to couple inductively with each other through the transformer magnetic circuit. The signal winding and the primary coil winding are formed by the same thin film process. The head portion and the transformer portion thus are arranged very closely and hence coupled with very little transfer loss of signal.
REFERENCES:
patent: 2585065 (1952-02-01), Wiegand
patent: 3055987 (1962-09-01), Ricketts
patent: 3344237 (1967-09-01), Gregg
patent: 3546565 (1970-12-01), Downing et al.
patent: 3660617 (1972-05-01), Hagopian
patent: 3789158 (1974-01-01), Walker et al.
patent: 3987487 (1976-10-01), Berger
patent: 3996543 (1976-12-01), Conner et al.
patent: 4402027 (1983-08-01), Nakamura et al.
Nakamura Kazuo
Takahashi Ken
Hecker Stuart N.
Matsushita Electric - Industrial Co., Ltd.
Urcia Benjamin E.
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