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    • 7. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06803131B2
    • 2004-10-12
    • US10236772
    • 2002-09-06
    • Naoki IkedaSeiichi Onodera
    • Naoki IkedaSeiichi Onodera
    • G11B566
    • G11B5/64Y10S428/90Y10T428/11Y10T428/265
    • Fine projections on a magnetic layer surface are controlled so as to reduce a media noise and improve C/Nmedia characteristic. A magnetic recording medium allows reproduction through a MR head or a GMR head. The magnetic layer on a main surface of a non-magnetic base has a coercive force of 80 KA/m or more and 180 KA/m or less. Assuming that a height of the fine projections is h and a diameter of the fine projections at a half-height h/2 is &phgr;h/2, 99% of the fine projections having a height not less than 10 nm satisfy a relationship as expressed by 100 nm≧&phgr;h/2≧40 nm.
    • 控制磁性层表面上的微细突起,以减少介质噪音并提高C / N媒体特性。 磁记录介质允许通过MR磁头或GMR磁头进行再现。 非磁性基体的主表面上的磁性层的矫顽力为80KA / m以上且180KA / m以下。 假设微细突起的高度为h,半高h / 2处的微细突起的直径为phih / 2,则具有不小于10nm的高度的细突起的99%满足如下表达的关系: 100nm> = phih / 2> = 40nm。
    • 9. 发明授权
    • Lubricant, recording medium and carboxylic acid compound
    • 润滑剂,记录介质和羧酸化合物
    • US07323260B2
    • 2008-01-29
    • US10959819
    • 2004-10-06
    • Ken KobayashiTomoe SatoYutaka IwamotoTadashi OzueSeiichi OnoderaTakahiro Kawana
    • Ken KobayashiTomoe SatoYutaka IwamotoTadashi OzueSeiichi OnoderaTakahiro Kawana
    • G11B5/66G11B5/70
    • C07C69/63C10M105/54C10M2211/0445C10N2240/204C10N2250/121G11B5/71G11B5/725
    • The present invention provides a lubricant capable of holding an excellent lubricating property under various types of service conditions, maintaining a lubricating effect for a long period of time and providing excellent traveling property, abrasion resistance, durability and the like, a recording medium using the lubricant and a carboxylic acid type compound constituting the lubricant. The lubricant is formed by using a carboxylic acid type compound having at least two carboxyl groups and one ester bond as represented by the following general formula (1) (for example, a compound as represented by the following chemical formula (1)) as a constituting mixture and, then, the thus-formed lubricant is allowed to be contained on or in a recording layer of the recording medium: in which Rf represents a non-substituted or substituted, saturated or unsaturated, fluorine-containing hydrocarbon group or hydrocarbon group; Es represents an ester bond; and R may be omitted or represent a non-substituted or substituted, saturated or unsaturated hydrocarbon group.
    • 本发明提供一种润滑剂,其能够在各种使用条件下保持优异的润滑性,长时间保持润滑效果,并提供优异的行驶性,耐磨性,耐久性等,使用润滑剂的记录介质 和构成润滑剂的羧酸型化合物。 通过使用由以下通式(1)表示的具有至少两个羧基和一个酯键的羧酸型化合物(例如,由以下化学式(1)表示的化合物)形成润滑剂作为 然后将由此形成的润滑剂包含在记录介质的记录层上或记录介质的记录层中:其中R f表示未取代或取代的饱和或不饱和的含氟烃基或烃基 ; Es表示酯键; 并且R可以省略或表示未取代或取代的饱和或不饱和烃基。
    • 10. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06969550B2
    • 2005-11-29
    • US10418333
    • 2003-04-18
    • Tomoe SatoTetsuo SamotoShinya YoshidaHitoshi WakoTakashi KanouNaoki IkedaKazuhiko SuzukiSeiichi Onodera
    • Tomoe SatoTetsuo SamotoShinya YoshidaHitoshi WakoTakashi KanouNaoki IkedaKazuhiko SuzukiSeiichi Onodera
    • G11B5/725
    • G11B5/725Y10T428/3154
    • There is provided a magnetic recording medium which exhibits superior lubricating properties and superior tape-transport properties as well as superior robustness even in a low-temperature environment. A magnetic layer containing a ferromagnetic metal is formed on a nonmagnetic support, and a protecting film is formed on the magnetic layer. A lubricant auxiliary coating composition comprising an aromatic alcohol is applied to the protecting film to form a lubricant auxiliary layer, and a lubricant coating composition comprising a compound represented by the formula (1) below is applied to the lubricant auxiliary layer to form a lubricant layer. R1CH(COOR2)CH2COOR3  (1) wherein R1 represents an aliphatic alkyl group, an aliphatic alkenyl group, or a hydrogen atom, and each of R2 and R3 independently represents a fluoroalkyl group, a fluoroalkenyl group, a fluoropolyether group, or a hydrogen atom.
    • 提供了一种磁性记录介质,即使在低温环境下也表现出优异的润滑性能和优异的带传输性能以及优异的鲁棒性。 在非磁性载体上形成含铁磁性金属的磁性层,在磁性层上形成保护膜。 将包含芳香醇的润滑剂辅助涂料组合物施加到保护膜上以形成润滑剂辅助层,并且将润滑剂涂料组合物施加到润滑剂辅助层上以形成润滑层 。 <?in-line-formula description =“在线公式”end =“lead”?> R <1> CH(COOR 2)2 其中R 1表示脂肪族烷基 基团,脂族烯基或氢原子,R 2和R 3各自独立地表示氟代烷基,氟烯基,氟聚醚基或 氢原子。