Thin film magnetic head having a lower pole shaped to improve re

Details Thin film magnetic head having a lower pole shaped to improve re Thin film magnetic head having a lower pole shaped to improve re

1995-11-13

1999-11-02

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360122, G11B 5147, G11B 5187

Patent

active

059781874

ABSTRACT:
The leading edge of a lower pole is constituted by a protruded central parallel portion, opposite end parallel portions, and slanted portions coupling the central parallel portion and the opposite end parallel portions. The width T.sub.wc of the central parallel portion is set to 10 to 25% of the total width T.sub.wa of the lower pole. The thickness P1' of the opposite end portion is set in the range from 3/1 or thicker to 3/2 or thinner than the thickness P1 of the central parallel portion.

REFERENCES:
patent: 4896417 (1990-01-01), Sawada et al.
patent: 5406434 (1995-04-01), Amin et al.
patent: 5452164 (1995-09-01), Cole et al.
patent: 5452166 (1995-09-01), Aylwin et al.
patent: 5479310 (1995-12-01), Atsushi et al.
M. Yoshida, et al., "Edge Eliminated Head", IEEE Transactions Of Magnetics, vol. 29, No. 6, Nov. 1993, pp. 3837-3839.

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