Recording/producing separated type magnetic head

Details Recording/producing separated type magnetic head Recording/producing separated type magnetic head

2006-05-09

2006-05-09

Cao, Allen (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07042677

ABSTRACT:
A protrusion24having a width Lpfw equal to or somewhat larger than a track width Tw and protruding to the air bearing surface is provided on a lower magnetic pole5or lower magnetic pole front end layer19. The lower magnetic pole5or the lower magnetic pole front end layer19other than the protrusion is retracted by Lpfd from the air bearing surface15. With the constitution, since the upper end surface23of the lower magnetic pole5or the lower magnetic pole to end layer19that generates the leakage magnetic fields in the off-track portions is not exposed to the air bearing surface15, the leakage magnetic fields Hxz in the off-track portions can be decreased greatly.

REFERENCES:
patent: 5452164 (1995-09-01), Cole et al.
patent: 6195232 (2001-02-01), Cohen
patent: 6788497 (2004-09-01), Cates
patent: 6791795 (2004-09-01), Ohtomo et al.
patent: 2003/0099054 (2003-05-01), Kamijima
patent: 2004/0037012 (2004-02-01), Nakanishi
patent: 2000276707 (2000-10-01), None
patent: 2002157705 (2002-05-01), None

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