Digital Equipment Corporation

Quock Y Ng

Gary C Rauch

Earl R Johns

William G Haines

Robert M Raymond

Chongwon Byun

Durga Ravipati

A hard protective material and method for forming the medium having the formula C.sub.x N.sub.y. The medium may be formed as a protective film on a magnetic recording disk in a sputtering apparatus such as a magnetron apparatus. The amount of nitrogen in the film may be affected by controlling the collisions of the sputtered material between the target and deposition substrate by controlling the bombardment of the substrate by electrons. The films exhibit properties indicative of a textured morphology on a nanoscale which enhances the retention of lubricant overcoats.

Nitrogen-containing materials for wear protection and friction reduction

Amphiphilic compound having one of the following structures:

Lubricants for magnetic media

A method for providing a lubricant coating on the surface of a magneto-optical disk is disclosed. The method includes forming a lubricant solution by dissolving a functionalized fluorinated lubricant compound in a solvent, the compound containing at least one fluorinated alkyl chain, and a functional group selected from an alcohol group (OH), carboxyl group (COOH) and phosphate group (PO.sub.4). The lubricant compound has a melting point above the ambient operating temperature of said magneto-optical disk and below about 85.degree. C. and a viscosity in the range of about one hundred to about one thousand centipoises in the temperature range of about 60.degree. to about 85.degree. C. The surface of the magneto-optical disk is coated with the lubricant solution, and the solvent is evaporated to produce a lubricant coating on the surface of a magneto-optical disk.

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Scottsdale, AZ, United States of America

Quock Y Ng