Three-pole magnetic recording head

Details Three-pole magnetic recording head Three-pole magnetic recording head

1987-07-29

1990-03-06

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360113, 360121, G11B 512, G11B 538

Patent

active

049071130

ABSTRACT:
The head includes a read pole disposed between a pair of write poles spaced apart to form a gap therebetween. The read pole conducts flux to a flux sensor that is located away from the gap. The head can be utilized for both longitudinal and perpendicular recording and the readback function can be carried out by an inductive coil or flux sensing devices such as a Hall sensor or an MR sensor. The recording head achieves high readback resolution, high write field gradients, and the capability for write wide-read narrow. The read pole and write poles are laminated structures.

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patent: 4639811 (1987-01-01), Diepers et al.
patent: 4644432 (1987-02-01), Heim
patent: 4656546 (1987-04-01), Mallary
patent: 4672493 (1987-06-01), Schewe
patent: 4713710 (1987-12-01), Soda et al.

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