Magnetic headwith specified tapered pole tip width ratio

Details Magnetic headwith specified tapered pole tip width ratio Magnetic headwith specified tapered pole tip width ratio

1997-09-08

1999-11-30

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Head

Core

360122, 360119, G11B 531, G11B 5187, G11B 523

Patent

active

059953438

ABSTRACT:
A magnetic head includes an elongate pole extending from an upper magnetic pole layer. The elongate pole has a tapered portion formed whose width is minimum width at the tip end of the pole. A ratio of the width of the narrowest section of the tapered portion to the width of the widest section (root) of the tapered portion is less than 1.0 but not less than 0.75.

REFERENCES:
patent: 4763215 (1988-08-01), Gueugnon et al.
patent: 4921508 (1990-05-01), Nonaka
patent: 5600519 (1997-02-01), Heim et al.
"Side Fringing of Thin Film Heads with Pole Trimming" J.Su et al.; IEEE Transactions of Magnetics, vol. 26, No. 5; Sep. 1990, p. 2463-2465.

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