Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2005-11-02
2008-11-25
Blouin, Mark (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
07457080
ABSTRACT:
A perpendicular magnetic recording head capable of minimizing the possibility of erasing recorded information without intention at the time of recording information is provided. A pole layer has a structure in which a main pole layer disposed on a leading side and an auxiliary pole layer disposed on a trailing side are laminated. Even if a part of a magnetic flux contained in the auxiliary pole layer is directly emitted from an air bearing surface to outside not via the main pole layer, as the magnetic flux is contained in the magnetic layer, the magnetic flux is not easily emitted from the air bearing surface to the outside directly. Therefore, an unnecessary perpendicular magnetic field is not easily generated by the magnetic flux. Thereby, a recording medium is not easily magnetized again by the unnecessary magnetic field, so information recorded on the recording medium is not easily erased without intention.
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Aoki Susumu
Kurumisawa Reiichi
Notsuke Yasuyuki
Ota Norikazu
Watabe Yuichi
Blouin Mark
Oliff & Berridge PLC.
TDK Corporation
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