Single pole magnetic head having intermediate magnetic layer...

Dynamic magnetic information storage or retrieval – Head – Core

Reexamination Certificate

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C360S119050

Reexamination Certificate

active

07359147

ABSTRACT:
A thin film magnetic head has a magnetic pole major layer terminated at a position receding from a medium-opposed surface. An intermediate magnetic layer extends forward toward the medium-opposed surface from the surface of the magnetic pole major layer. The intermediate magnetic layer is terminated at a position receding from the medium-opposed surface. A tip magnetic layer extends to the medium-opposed surface from the surface of the intermediate magnetic layer so as to expose the front end at the medium-opposed surface. The layered structure serves to diminish variation in the sectional area of the path of the magnetic flux. Saturation of magnetic flux is sufficiently suppressed irrespective of the reduction in the sectional area. Even if the tip magnetic layer is reduced in lateral width, the tip magnetic layer allows a sufficient leakage of magnetic flux from the front end.

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Liu et al.; “Advanced Probe Head for Perpendicular Recording”; IEEE Trans. on Magnetics, vol. 38, No. 4; pp. 1647-1651; Jul. 2002.
Stoev et al.; “High Linear Density Study of Advanced Single-Pole Head”; IEEE Trans. on Magnetics, vol. 38, No. 5; pp. 2243-2248; Sep. 2002.

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