Thin-film magnetic head with thin-film coil of low resistance

Details Thin-film magnetic head with thin-film coil of low resistance Thin-film magnetic head with thin-film coil of low resistance

2005-09-27

2005-09-27

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Coil

Reexamination Certificate

active

06950279

ABSTRACT:
A thin-film magnetic head comprises a medium facing surface, a bottom pole layer, a top pole layer, a recording gap layer, and a thin-film coil. The bottom pole layer and the top pole layer are coupled to each other via a coupling portion located away from the medium facing surface. The coupling portion has an end face facing toward the medium facing surface. The end face includes a curved surface convex toward the medium facing surface. The thin-film coil has a conductive layer of three turns disposed around the coupling portion. The first turn of the conductive layer from an inner side thereof includes a portion disposed between the end face of the coupling portion and the medium facing surface. This portion has a minimum width of the conductive layer at a position on a virtual line connecting the end face of the coupling portion and the medium facing surface in the shortest distance, and increases in width with distance from the virtual line.

REFERENCES:
patent: 5995342 (1999-11-01), Cohen et al.
patent: 6043959 (2000-03-01), Crue et al.
patent: 6191916 (2001-02-01), Sasaki
patent: 6204997 (2001-03-01), Sasaki
patent: 6507455 (2003-01-01), Kikuiri et al.
patent: 2005/0073773 (2005-04-01), Sasaki et al.
patent: A 11-283215 (1999-10-01), None

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