Read Rite Corporation

Vincent D Retort

Yong Shen

Steven C Rudy

Peter G Bischoff

John R Osborne

David J Rauch

A magnetic head assembly includes a magnetoresistive (MR) read sensor dielectrically disposed between a magnetic shield layer and a first pole layer. A write transducer comprises an inductive coil having a plurality of windings dielectrically disposed between the first pole layer and a second pole layer. The magnetic shield layer partially overlaps portions of the coil windings. A nonmagnetic layer is coplanar with the magnetic shield layer. A reduced coupling area between the magnetic shield layer and the coil decreases the mutual inductance applied to the magnetic coil by the magnetic layer, resulting in the coil having better response to write current and being capable of operating at wider frequency ranges. The first pole layer includes a unique shape having a narrow mid-section integrally formed between the wider end sections. The narrow mid-section of the first pole layer also reduces the coupling area between the first pole layer and the coil and reduces the mutual inductance from the first pole layer to the coil.

Shielded magnetic head having an inductive coil with low mutual

A thin film magnetic head is made with a center-tapped coil structure formed of three layers of coils. The middle coil is configured to be bifilar. When recording data on a magnetic medium, current flows through one-half of the bifilar coil and through one adjacent coil to create positive transitions, and for negative transitions, current flows through the other half of the bifilar coil and through the other adjacent coil. When reading the data that is recorded on a magnetic medium, all turns of the entire coil configuration operate for transducing the data.

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Pleasanton, CA, United States of America

Vincent D Retort