Thin film magnetic head and method of manufacturing the same

Details Thin film magnetic head and method of manufacturing the same Thin film magnetic head and method of manufacturing the same

2005-10-04

2005-10-04

Tupper, Robert S. (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

06952325

ABSTRACT:
Provided is a thin film magnetic head capable of ensuring the strength of a perpendicular magnetic field and improving recording performance. A bottom pole portion layer and a top pole portion layer constituting a part of a main magnetic pole are formed so that a cross sectional area of a complex including front end portions of the bottom pole portion layer and the top pole portion layer is smaller than a cross sectional area of a complex including rear end portions thereof, and a width of a top edge in an exposed surface is larger than a width of a bottom edge, and is equal to or larger than a width of the exposed surface in a middle position between the top edge and the bottom edge. In recording, magnetic fluxes flowing in a main magnetic pole are focused toward an air bearing surface, and are concentrated on the front end portion of the top pole portion layer which is a main emitting portion of the magnetic fluxes, so sufficient magnetic fluxes can be supplied to the air bearing surface.

REFERENCES:
patent: 6504675 (2003-01-01), Shukh et al.
patent: 6721131 (2004-04-01), Litvinov et al.
patent: A 2002-208113 (2002-07-01), None
“From longitudinal recording to perpendicular recording Challenge to unexplored field in HDD” In the 8thMMM-Intermag Joint Conference Nikkei Electronics (No. 789) published on Feb. 12, 2001 w/ English translation.

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