Patent ID: 6190749
Filing Date: 2001-02-20
Classification: C10M,C10N,C23C,G11B,Y10S,Y10T

Abstract:
An information storage system comprising:a rigid information storage medium having a nitrogenated carbon overcoat or hydrogenated nitrogenated carbon overcoat on a surface of said medium;at least one read/write head comprising a transducer for information introduction and/or retrieval from said medium;an actuator supporting said at least one read/write head for moving said transducer relative to said storage medium; andlubricating means for lubricating the surface of said storage medium, wherein said lubricating means includes a perfluoropolyether with hydroxyethyloxymethyl endgroups having the formula of:HO.sub.p (CH.sub.2 --CH.sub.2 O)CH.sub.2 --Z--CH.sub.2 (OCH.sub.2 --CH.sub.2).sub.p OHwhere Z is --CF.sub.2 --(OC.sub.2 F.sub.4).sub.m --(OCF.sub.2).sub.n --OCF.sub.2 --, and p has an average value of 1.5, the ratio of m to n is approximately 1.0, and where said lubricating means has a molecular weight in the range of approximately 2000 to 6000 AMU.