Dynamic magnetic information storage or retrieval – Head – Coil
Reexamination Certificate
2011-04-05
2011-04-05
Castro, Angel A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Coil
Reexamination Certificate
active
07920357
ABSTRACT:
Provided is a thin-film magnetic head capable of writing data with high accuracy on a magnetic recording medium having high coercive force without heating. The head comprises an electromagnetic coil element comprising: a main magnetic pole; an auxiliary magnetic pole; and a write coil formed so as to pass through at least between the main magnetic pole and the auxiliary magnetic pole, for generating the write magnetic field. In this head, a part of the write coil has a layered structure of: a resonance coil layer for generating a resonance magnetic field having ferromagnetic resonance frequency of a magnetic recording layer of a magnetic recording medium or having a frequency in the vicinity thereof; and a write coil layer. And further, the resonance coil layer and the write coil layer sandwich an insulating layer therebetween.
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Ikeda Hiroshi
Matsuzaki Mikio
Ota Norikazu
Roppongi Tetsuya
Sato Isamu
Castro Angel A.
Oliff & Berridg,e PLC
TDK Corporation
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