Thin film magnetic head which suppresses inflow of magnetic...

Details Thin film magnetic head which suppresses inflow of magnetic... Thin film magnetic head which suppresses inflow of magnetic...

2007-05-16

2010-10-19

Davis, David D (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07817381

ABSTRACT:
A thin film magnetic head comprises a lower magnetic shield layer and an upper magnetic shield layer which are mutually opposed in the layering direction, a magnetoresistance effect element having a free layer, and a bias-applying layer which applies a bias magnetic field to the magnetoresistance effect element. The free layer is positioned between the lower magnetic shield layer and the upper magnetic shield layer, and is positioned on the side of the media-opposed surface. The bias-applying layer has a first portion, a second portion, and a third portion. The first portion and the second portion are positioned at a distance in the track width direction so as to enclose the magnetoresistance effect element therebetween. The third portion is positioned either between the magnetoresistance effect element and the lower magnetic shield layer or between the magnetoresistance effect element and the upper magnetic shield layer, and connects the first portion and the second portion.

REFERENCES:
patent: 6005753 (1999-12-01), Fontana et al.
patent: 6563679 (2003-05-01), Li et al.
patent: A 2002-123912 (2002-04-01), None
patent: A 2002-175611 (2002-06-01), None
patent: A 2004-319709 (2004-11-01), None
patent: A 2006-228326 (2006-08-01), None

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