Simplified, shielded twin-track read/write head structure

Details Simplified, shielded twin-track read/write head structure Simplified, shielded twin-track read/write head structure

1985-10-02

1987-10-06

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360126, G11B 5147

Patent

active

046987118

ABSTRACT:
This invention is an improvement in the design of a twin-track read/write heads. The present design eliminates the reluctance gap between the U-shaped write drive coil structure and the U-shaped magnetic sensor and coupling leg structure in that patent. A new structure incorporating two separate coupling legs with a gap at the pole tip interface to the magnetic recording medium for reading and writing is utilized. The new design also incorporates a back gap to adjust the overall reluctance and proportional effect of flying height gap variations. In addition, magnetic shields are introduced to further reduce the effects of fringe field interference at the write head to media interface.

REFERENCES:
patent: 4315291 (1982-02-01), Lazzari
patent: 4599668 (1986-07-01), Griffith

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