Thin film magnetic head capable of inhibiting occurrence of...

Details Thin film magnetic head capable of inhibiting occurrence of... Thin film magnetic head capable of inhibiting occurrence of...

2006-03-28

2006-03-28

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07019944

ABSTRACT:
Provided is a thin film magnetic head capable of inhibiting the occurrence of track erasing and improving the reliability of magnetic recording. Two taper surfaces are disposed on both sides of a return yoke layer. As no corner portion which may induce concentration of a magnetic flux exists on the both sides of the return yoke layer, even if the magnetic flux emitted from a pole layer is returned to the return yoke layer through a hard disk, a magnetic field strength is not locally and pronouncedly concentrated in proximity to the taper surfaces of the return yoke layer. Thereby, the concentration of the magnetic flux can be prevented, and the probability of the occurrence of unnecessary recording decreases, so the occurrence of track erasing can be inhibited, and the reliability of magnetic recording can be improved.

REFERENCES:
patent: 5384680 (1995-01-01), Mallary
patent: 5995341 (1999-11-01), Tanaka et al.

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