Composite type magnetic head and magnetic recording/playback apparatus adopting the same
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkiyoshi Hirano, Hiroshi Yamaki
Life of this patent
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Abstract
A composite type magnetic head suitable for use in a magnetic recording and playback apparatus includes a main gap having an azimuth preset for recording and/or playing back a signal and a pair of pseudo gaps, each having an azimuth which is arranged to be not parallel to the main gap. The azimuth of the pseudo gaps is also arranged not to be parallel to the azimuth of the signal recorded on a recording track. With the above-described structure, the output level of a signal produced by the pseudo gap when recording or reproducing is reduced such that interference which the pseudo gap exerts upon a signal played back by the main gap is reduced, thereby eliminating deterioration in the signal-to-noise ratio.
Claims10
A magnetic recording and playback apparatus, comprising:
- a plurality of magnetic heads, at least one magnetic head being a composite type magnetic head, each said at least one composite type magnetic head having a main gap and at least one pseudo gap, a pseudo gap being a boundary formed between two adjacent dissimilar non-gaseous materials;
- said main gap of said at least one composite type magnetic head having an azimuth preset for recording and/or playing back a signal;
- said at least one pseudo gap of said at least one composite type magnetic head having an azimuth which is non-parallel to said main gap of said at least one composite type magnetic head;
- said at least one pseudo gap of said at least one composite type magnetic head being non-parallel to a main gap of another of the plurality of magnetic heads, the another magnetic head having a main gap with a preset azimuth different from said preset azimuth of said main gap of said at least one composite type magnetic head.
A composite type magnetic head composed of a plurality of dissimilar solid materials, comprising:
- a main gap having an azimuth preset for recording or playing back a signal;
- and
- at least one pseudo gap, a pseudo gap being a boundary formed between two adjacent dissimilar solid materials, each pseudo gap having an azimuth preset to be non-parallel to said main gap;
- said azimuth of said at least one pseudo gaps being arranged non-parallel to an azimuth of a signal recorded on a recording track.
Dependencies are inferred from the claim text.