Magnetic head

Details Magnetic head Magnetic head

1994-10-24

1996-03-12

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Coil

G11B 517

Patent

active

054991501

ABSTRACT:
It is an object of the present invention to decrease imbalance of a recording magnetic field of a read/write head generated due to leakage of an erase magnetic field of an antecedent erase head, and to decrease the error rate at a time of reading data. The number of turns of a second read/write coil generating a magnetic field for recording data having one polarity in a direction opposite to that of a leakage magnetic field generated by an erasing coil is made smaller than that of a first read/write coil generating a magnetic field for recording data having the other polarity in the same direction as the leakage magnetic field, whereby rise time of a recording electric current flowing in the second read/write coil is shortened and a magnetic field thus generated is made stronger than the magnetic field generated by the first read/write coil, thus reducing the influence of the leakage magnetic field so as to enable uniform writing of data having both polarities and decreasing an error rate at a time of reading the recorded data.

REFERENCES:
patent: 2475421 (1949-07-01), Camras
patent: 3697705 (1972-10-01), Holt
patent: 5021910 (1991-06-01), Murakami
IBM Technical Disclosure Bulletin, Write-Wide, Read Narrow Magnetic Head, vol. 4 No. 10 Mar. 1962.

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