解説 Lubricant and Overcoat Systems for Rigid Magnetic Recording Media

概要

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Implementation of advanced magnetic alloys and sensor technologies in hard-disk drives have in the past decade fueled a 60% yearly compound growth rate in storage densities. Over this same time period, however, very little advancement has been realized in the materials employed at the head-disk interface (HDI) for tribology. Since future increases in magnetic recording densities will necessitate substantial reductions in both the fly heights and the thicknesses of the protective overcoats and lubricants used at the HDI, an increased understanding of the fundamental principles by which to optimize the tribological performance of these materials is required. This review focuses on the interaction forces that develop between the molecularly thin perfluoropolyether lubricant films and the commonly employed overcoats used on magnetic recording heads and disks. The impact of these intermolecular forces on the mechanical reliability of the HDI is discussed and future design criteria outlined.
社団法人日本磁気学会の論文
2002-03-01