Patent ID: 6753060
Filing Date: 2004-06-22
Classification: G11B,Y10T

Abstract:
A data/information storage and retrieval medium with enhanced Contact Start/Stop (â€œCSSâ€ ) performance, comprising:(a) a disk-shaped substrate including at least one surface, a layer stack formed on said at least one surface and including at least one magnetic or magneto-optical (â€œMOâ€ ) recording layer and an uppermost, protective overcoat layer comprising a carbon (C)-based material; and (b) a lubricant topcoat layer on said protective overcoat layer, comprising at least one perfluoropolyether compound as a primary lubricant and at least one phosphazene derivative as a lubricant additive, said lubricant topcoat layer treated solely with UV radiation at a dosage sufficient to: (i) increase the glide yield of said medium, relative to that provided by the same medium but with an untreated lubricant topcoat layer; (ii) decrease the glide noise of said medium, relative to that provided by the same medium but with an untreated lubricant topcoat layer; and (iii) increase the number of CSS pass cycles of said medium before failure, relative to that provided by the same medium but with an untreated lubricant topcoat layer.