Perpendicular magnetic recording head, method of...

Details Perpendicular magnetic recording head, method of... Perpendicular magnetic recording head, method of...

2006-03-31

2008-10-07

Blouin, Mark (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07433152

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.

REFERENCES:
patent: 6687084 (2004-02-01), Takahashi et al.
patent: 2003/0193744 (2003-10-01), Takahashi et al.
patent: 2006/0002021 (2006-01-01), Li et al.
patent: 0 360 978 (1990-04-01), None
patent: A-02-066710 (1990-03-01), None
patent: A-2001-250204 (2001-09-01), None
patent: A-2002-197615 (2002-07-01), None

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