Hmt Technology Corporation

James L Chao

Michael A Russak

Ming M Yang

Brij B Lal

Bruce M Harper

Sudhir S Malhotra

Zhangmin Wang

Chao Gao

Zhaoguo Jiang

Yu-Cheun Lee

Protective overlayers for magnetic recording media are described. The overlayers, composed of a transition metal-silicon or transition metal-germanium interlayer and a carbon overcoat, provide good wear resistance and corrosion resistance at thicknesses of less than 100 &angst;.

Thin overlayer for magnetic recording disk

A magnetic recording medium having a barrier layer deposited directly on the magnetic recording layer is described. The barrier layer is deposited by sputter deposition under a nitrogen-containing sputtering atmosphere to form a nitrogen-containing chromium or chromium alloy barrier layer. The barrier layer is effective to inhibit migration of cobalt from the underlying magnetic recording layer, reducing corrosion of the medium and improving magnetic recording performance.

Magnetic recording medium having a nitrogen-containing barrier layer

A texturing device for texturing a disc substrate of the type used in forming a thin-film medium is described. The device includes a rotatable assembly having a first pad attached to one end of a spindle and an annular ring having a second pad attached on one surface. Each pad defines a texturing surface for texturing the inner and outer regions of the disc substrate.

Device for texturing a disc substrate

A thin-film magnetic recording disc for use with a read/write head in a disc drive is disclosed. To reduce the static and dynamic frictional coefficients of the disc surface, the disc is coated with a lubricant layer composed of a mixture of a polyphenoxycyclotriphosphazene lubricant and a perfluoropolyether oil. Also disclosed is a lubricant composition containing these two components, as well as a method for improving the lubricating properties of a perfluoropolyether oil.

Lubricant composition and method

An improvement in a magnetic recording disc having a protective overcoat is described. The overcoat extends between an inner-diameter landing zone and a data zone and has a thickness in the landing zone of at least 135 .ANG. and a thickness in the data zone of less than 90 .ANG..

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Milpitas, CA, United States of America

James L Chao