Magnetic head for perpendicular magnetic recording and...

Details Magnetic head for perpendicular magnetic recording and... Magnetic head for perpendicular magnetic recording and...

2011-06-07

2011-06-07

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S125200

Reexamination Certificate

active

07957097

ABSTRACT:
An encasing section includes an encasing layer having an encasing groove, and a nonmagnetic film disposed in the encasing groove at a position between the encasing layer and a pole layer. The pole layer includes a track width defining portion and a wide portion. The track width defining portion has a first side surface and a second side surface. The wide portion has a third side surface and a fourth side surface. The encasing layer has a first wall surface and a second wall surface. The distance between the third side surface and the first wall surface is smaller than the distance between the first side surface and the first wall surface. The distance between the fourth side surface and the second wall surface is smaller than the distance between the second side surface and the second wall surface.

REFERENCES:
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patent: 2001/0012541 (2001-08-01), Sasaki et al.
patent: 2006/0002014 (2006-01-01), Sasaki et al.
patent: 2006/0077589 (2006-04-01), Sasaki et al.
patent: 2006/0198049 (2006-09-01), Sasaki et al.
patent: 2007/0014048 (2007-01-01), Sasaki et al.
patent: 2007/0115584 (2007-05-01), Balamane et al.
patent: A 2002-92821 (2002-03-01), None
patent: A 2003-203311 (2003-07-01), None

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