Perpendicular magnetic recording head with divided auxiliary...

Details Perpendicular magnetic recording head with divided auxiliary... Perpendicular magnetic recording head with divided auxiliary...

2008-04-23

2011-12-06

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

08072707

ABSTRACT:
In a perpendicular magnetic recording head comprising a main magnetic pole layer, a return yoke layer, and an auxiliary yoke layer, a plurality of rear magnetic connecting layers intermittently extending to a connecting position with the return yoke layer are provided at the same lamination position as with the main magnetic pole layer on the rear side of the main magnetic pole layer in the height direction. The auxiliary yoke layer is formed by a plurality of divided auxiliary yoke layers intermittently extending on the rear side of the medium-opposing surface in the height direction and magnetically connecting the main magnetic pole layer to the plurality of rear magnetic connecting layers, respectively. In each of the main magnetic pole layer, plurality of rear magnetic connecting layers, and plurality of divided auxiliary yoke layers, the size in the track width direction is defined greater than the size in the height direction.

REFERENCES:
patent: 2004/0190197 (2004-09-01), Watabe et al.
patent: 2006/0098338 (2006-05-01), Watabe et al.
patent: 2006/0176613 (2006-08-01), Lim et al.
patent: A-5-166130 (1993-07-01), None
patent: A-2000-331310 (2000-11-01), None
patent: A-2006-147058 (2006-06-01), None
patent: A-2006-221785 (2006-08-01), None

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