International Business Machines Corporation

Hitachi Global Technologies

Jeffrey William Carr

Moris Musa Dovek

Mohamad Towfik Krounbi

Jeffrey Paul Gunder

Kenneth Parker Rodbell

Lawrence D David

Robert William Pasco

William L Guthrie

Frank Benjamin Kaufman

Anton Nenadic

William J Patrick

A magnetoresistive read/inductive write magnetic head assembly formed on a hard electrically insulating substrate and having electrostatic discharge protection comprises: a hard electrically insulating substrate, preferably formed of sapphire or alumina-TiC; multiple alumina layers formed over the substrate; a magnetoresistive read/inductive write head positioned between the alumina layers; a silicon layer supported by the substrate; and a semiconducting circuit integrated into the silicon layer and interconnected with said magnetoresistive read/write inductive write head to provide electrostatic discharge protection to the head. The silicon layer may be epitaxially grown on the substrate when implemented as sapphire, or bonded to the substrate when implemented as alumina-TiC. The hard electrically insulating substrate and alumina layers provide the assembly with a hard air bearing surface having generally uniform lapping and etching characteristics, and excellent durability.

Method of making magnetoresistive read/ inductive write magnetic head assembly fabricated with silicon on hard insulator for improved durability and electrostatic discharge protection

A composite thin film slider with a protruding R/W device formed by chemical-mechanical polishing to protrude above its substrate and thereby reduce the distance between the R/W device and the recording media. The slider includes a ceramic or non-ceramic substrate with a substantially planar bearing surface, and a R/W device. The R/W device includes an insulator and certain conductive R/W components, deposited onto the substrate's deposit end. The R/W components may include, for example, a magnetic shield layer, a MR stripe layer, and a magnetic pole tip layer, all layered over the deposit end of the substrate. The R/W components protrude from the insulator sufficiently to extend past the substrate's bearing surface. To manufacture this slider, a substrate with the R/W device deposited thereon is polished with a lapping slurry to disproportionately erode the substrate and insulator with respect to the R/W components. The R/W components therefore protrude from the insulator and the ceramic substrate's bearing surface.

Process for manufacturing a thin film slider with protruding R/W element

Magnetoresistive read/inductive write magnetic head assembly fabricated

Thin film slider with protruding R/W element formed by

Disclosed is a method of chem-mech polishing an electronic component substrate. The method includes the following steps;

Method of chemical-mechanical polishing an electronic component

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Morgan Hill, CA, United States of America

Jeffrey William Carr