High data rate write head

Details High data rate write head High data rate write head

2005-10-04

2005-10-04

Klimowicz, William J (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

06952326

ABSTRACT:
A magnetic head assembly includes first and second pole pieces and first and second coil layers wherein the second pole piece has a ferromagnetic pole tip which forms a portion of an air bearing surface and defines a track width of a write head. A write gap layer is located between the first pole piece and the pole tip. A dielectric first insulation layer interfaces first and second side surfaces of the pole tip and is located between the first and second coil layers. The second pole piece has a ferromagnetic second pole piece structure which is magnetically connected to each of the pole tip and the first pole piece and extends across the second coil layer. In a first embodiment the second pole piece structure is a single layer and in a second embodiment the second pole piece structure has front and back components with a flat laminated second pole piece yoke layer located therebetween.

REFERENCES:
patent: 6317288 (2001-11-01), Sasaki
patent: 6400526 (2002-06-01), Crue et al.
patent: 6553649 (2003-04-01), Santini
patent: 6693769 (2004-02-01), Hsu et al.
patent: 2001/0012177 (2001-08-01), Crue et al.
patent: 2002/0191334 (2002-12-01), Hsu et al.

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