Combined magnetic write and read head for the vertical magnetiza

Details Combined magnetic write and read head for the vertical magnetiza Combined magnetic write and read head for the vertical magnetiza

1984-12-20

1987-01-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

360123, 360113, G11B 5127, G11B 517

Patent

active

046398112

ABSTRACT:
A magnetic head for a recording medium which can be magnetized perpendicularly contains a ring head-like magnetic conduction body for carrying magnetic flux, the conduction body having two magnet legs, the poles of which are arranged one behind the other as seen in the direction of motion of the head and at a predetermined distance from each other. At least one coil winding is associated with the magnet legs, the turns of which extend through a space formed between the magnet legs. With this magnetic head, a switchable write and read function having high efficiency is obtainable. In addition to the mentioned coil winding serving only for executing a read function, an additional coil winding for executing a write function is provided which partly encloses one magnet leg. The other magnet leg has, at least in a subsection, a predetermined small cross section, so that this subsection is driven, at least largely, into magnetic saturation during the write function by means of the additional write coil winding while the read coil winding carries no current. The write function can be performed with the magnetic head as if it is a single-pole head.

REFERENCES:
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patent: 4287544 (1981-09-01), Lazzari
patent: 4317148 (1982-02-01), Chi
patent: 4404609 (1983-09-01), Jones, Jr.
patent: 4458279 (1984-07-01), Katz
Romankiw et al., "Batch Fabrication of Thin Film Magnetic Recording Heads: A Literature Review and Process Description for Vertical Single Turn Heads", IEEE Trans on Magnetics, vol. Mag-11, No. 1, Jan. 1975, pp. 50-55.
Hoagland, "Combined Longitudinal and Vertical Magnetic Recording Head", IBM Tech. Disclosure Bull., vol. 20, No. 8, Jan. 1978, pp. 3311-3312.
"IEEE Transactions on Magnetics", vol. MAG-16, No. 1 (Jan. 1980), pp. 71-76.
"IEEE Transactions on Magnetics", vol. MAG-18, No. 6 (Nov. 1982), pp. 1158-1163, 1170-1172.
"IEEE Transactions on Magnetics", vol. MAG-17, No. 6 (Nov. 1981), pp. 2538-2540, 3120-3122.
"IEEE Transactions on Magnetics"vol. MAG-16, No. 5 (Sep. 1980), pp. 967-972.

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