Perpendicular magnetic recording head that suppresses side...

Details Perpendicular magnetic recording head that suppresses side... Perpendicular magnetic recording head that suppresses side...

2008-04-30

2011-11-08

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Gap spacer

C360S125300

Reexamination Certificate

active

08054578

ABSTRACT:
A perpendicular magnetic recording head includes a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, and a pair of side shield layers positioned on both sides in the track width direction of the main magnetic pole layer while interposing a nonmagnetic material layer therebetween. The magnetic gap layer is constituted by a first gap layer formed in a partial area in the track width direction bridging the main magnetic pole layer and the pair of side shield layers, and a second gap layer thinner than the first gap layer and interposed between the return yoke layer and the pair of side shield layers in a remaining area where the first gap layer is absent.

REFERENCES:
patent: 2006/0198049 (2006-09-01), Sasaki et al.
patent: 2008/0068747 (2008-03-01), Sasaki et al.
patent: A-2004-127480 (2004-04-01), None
patent: A-2005-092929 (2005-04-01), None
patent: A-2005-182987 (2005-07-01), None
patent: A-2005-310363 (2005-11-01), None
patent: A-2006-134540 (2006-05-01), None

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