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    • 2. 发明授权
    • Granular perpendicular media with surface treatment for improved magnetic properties and corrosion resistance
    • 具有表面处理的颗粒垂直介质,用于改善磁性能和耐腐蚀性
    • US07169488B2
    • 2007-01-30
    • US10705069
    • 2003-11-10
    • Qixu ChenTom NolanRaj Nagappan ThangarajZhong (Stella) WuSamuel Dacke Harkness
    • Qixu ChenTom NolanRaj Nagappan ThangarajZhong (Stella) WuSamuel Dacke Harkness
    • G11B5/66G11B5/70
    • G11B5/732G11B5/65G11B5/667G11B5/72G11B5/8408G11B5/851G11B2005/0029
    • A granular perpendicular magnetic recording medium having a surface treated magnetic layer comprising an oxidized or nitrogenized boundary layer formed on the surface of the magnetic layer, wherein the magnetic layer comprises granular magnetic regions having oxygen and/or nitrogen-containing grain boundaries. In one embodiment, the granular perpendicular recording medium further comprises a soft magnetic layer below the surface treated granular magnetic layer and a protective overcoat over the surface treated granular magnetic layer. A method of manufacturing a granular perpendicular magnetic recording medium includes depositing a magnetic layer having granular structure over a substrate and subsequently surface treating the granular magnetic layer in an oxygen and/or nitrogen-containing atmosphere to produce an oxidized and/or nitrogenized boundary layer formed on the surface of the granular magnetic layer. The granular perpendicular magnetic recording medium of the present invention exhibits high Hc and SNR while exhibiting improved corrosion resistance and contact start-stop performance.
    • 一种具有表面处理的磁性层的颗粒状垂直磁记录介质,包括形成在磁性层的表面上的氧化或氮化的边界层,其中磁性层包括具有氧和/或含氮晶界的颗粒状磁性区域。 在一个实施例中,粒状垂直记录介质还包括在表面处理的颗粒磁性层下方的软磁性层和在表面处理过的颗粒状磁性层上的保护性外涂层。 一种制造粒状垂直磁记录介质的方法包括在衬底上沉积具有粒状结构的磁性层,随后在氧和/或含氮气氛中表面处理粒状磁性层,以形成形成的氧化和/或氮化的边界层 在粒状磁性层的表面上。 本发明的粒状垂直磁记录介质表现出高的Hc和SNR,同时具有改进的耐腐蚀性和接触起止性能。