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US 6,125,018 AGranted
Composite type thin-film magnetic head
AssigneeRead-Rite SMI Corporation
InventorsMasayuki Takagishi, Shin-ichi Akoh, Daisuke Iitsuka
Life of this patent
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Abstract
A composite type thin-film magnetic head. In one embodiment, a projection is formed on a second magnetic film layer of a composite type thin-film magnetic head. The position where this projection is formed is the area where a second magnetic film layer and third magnetic film layer face each other across a gap film layer. A width b of the projection is smaller than a width a of the third magnetic layer film.
Claims8
A composite type thin-film magnetic head, comprising:
- a first magnetic film layer, a second magnetic film layer having a major surface, and a third magnetic film layer;
- a magneto-resistive element interposed between the first magnetic film layer and the second magnetic film layer such that a magneto-resistive head used for playback is constructed, wherein end portions of the second magnetic film layer and third magnetic film layer face each other across a gap film layer such that an inductive head used for recording is constructed;
- a step-form projection formed in a portion of the second magnetic film layer that faces the third magnetic film layer, wherein a width of a facing portion of the projection is smaller than a width of a facing portion of the third magnetic film layer, the facing portion of the third magnetic film layer defining a boundary of the gap film layer, the step-form projection rising above the major surface of the second magnetic film layer;
- and
- the magneto-resistive head having a read gap, the read gap having a center, the composite type thin-film magnetic head having a writing gap, the writing gap having a center and a length, a distance between the center of the read gap and the center of the writing gap being less than 9 times the length of the writing gap.
2 more elements
Dependencies are inferred from the claim text.