Low-noise magnetic read/write head

Details Low-noise magnetic read/write head Low-noise magnetic read/write head

1988-12-21

1990-07-03

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Plural gaps

360122, 360125, G11B 5265, G11B 5187

Patent

active

049396080

ABSTRACT:
Disclosed is a magnetic head apparatus, which comprises a pair of magnetic cores defining a magnetic gap for recording and reproducing information, and grooves in the lateral faces of the magnetic cores, extending at right angles to those faces of the cores which are opposed to a magnetic recording medium or which define the magnetic cores. The grooves determine the width of the magnetic gap. That face of at least one of the magnetic cores which is opposed to the recording medium, is recessed from the remaining portion of the core, so as to cover a width equivalent to the length of the grooves, at the maximum. In the magnetic head of the invention, moreover, a nonmagnetic portion is formed at least on an erase gap, so that the degree of magnetic coupling between the erase gap and the recording medium is lower than that between a read/write gap and the medium. Thus, magnetic induction, which is produced in the erase core when data is read from the medium, is reduced.

REFERENCES:
patent: 4017899 (1977-04-01), Bagby
patent: 4531170 (1985-07-01), Takei et al.
Morrison et al., "Magnetic Transducer Head", IBM Tech Disc Bull, vol. 7, No. 4, Sep. 1964, p. 333.

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