Yoke-type magnetic head and magnetic disk apparatus

Details Yoke-type magnetic head and magnetic disk apparatus Yoke-type magnetic head and magnetic disk apparatus

2007-06-22

2010-12-07

Castro, Angel A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07848063

ABSTRACT:
According to one embodiment, a yoke-type magnetic head for reading out magnetic information from a medium in which information is magnetically recorded in a track direction, the head includes a magnetic pole which is provided on a plane perpendicular to a linear recording direction and has an opposing surface facing the medium, a saturation magnetic flux density Bs1, and a volume V1, a sub yoke which is formed on the plane by being connected to the magnetic pole, and has a length SYW in a direction perpendicular to the linear recording direction longer than a length SYH in a direction perpendicular to a surface of the medium, and a saturation magnetic flux density Bs2and a volume V2, the product Bs2V2of which is larger than the product Bs1V1, and a magnetoresistance effect film which is formed between the sub yoke and the opposing surface, and abuts the magnetic pole.

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patent: 6-119619 (1994-04-01), None
patent: 2001-256608 (2001-09-01), None

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