Recording heads with side shields

Details Recording heads with side shields Recording heads with side shields

1988-03-16

1990-06-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360113, 360121, G11B 512, G11B 538

Patent

active

049358324

ABSTRACT:
Side shields are provided adjacent to the magnetic poles of recording heads. The side shields are used for read and write operations for both longitudinal and vertical recording. During read, the side shields intercept flux from adjacent tracks and shunts it around the sensor to magnetic ground. During write, side shields contain the write field of the head so that it does not corrupt the data on adjacent tracks. Embodiments are disclosed for both longitudinal and perpendicular or vertical recording.

REFERENCES:
patent: 3700828 (1972-10-01), Zacoroli
patent: 3921217 (1975-11-01), Thompson
patent: 4566050 (1986-01-01), Beam et al.
patent: 4633352 (1986-12-01), Mizoguchi et al.
patent: 4651243 (1987-03-01), Daste et al.
patent: 4656546 (1987-04-01), Mallory
patent: 4758917 (1988-07-01), Gooch
patent: 4816950 (1989-03-01), Heinz et al.
Shew, "Increased Density Magnetic Recording," IBM TDB, vol. 2, No. 2, Aug. 1959, p. 35.
Vinal, "Magnetically Shielded Twin-Track Magnetic Read Head Structure," IBM TDB, vol. 26, No. 7B, Dec. 1983, pp. 3748-51.

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