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    • 8. 发明授权
    • Thermally-assisted magnetic recording system with head having resistive heater in write gap
    • 带磁头的热辅助磁记录系统具有写入间隙中的电阻加热器
    • US06493183B1
    • 2002-12-10
    • US09608848
    • 2000-06-29
    • Prakash KasirajNeil Leslie RobertsonHemantha Kumar Wickramasinghe
    • Prakash KasirajNeil Leslie RobertsonHemantha Kumar Wickramasinghe
    • G11B5147
    • G11B5/3903G11B5/127G11B13/045G11B2005/0005G11B2005/0021
    • A thermally-assisted magnetic recording disk drive records data by heating a small region of the magnetic layer on the disk to near or above its Curie temperature while a write field is applied by a thin film inductive write head. The thin film inductive write head includes an electrically resistive heater located in the write gap between the pole tips of the write head. The resistive heater is sandwiched between first and second spacer layers that are located between the pole tips of the write head. In a current-perpendicular-to-the plane (CPP) embodiment, the spacer layers are electrically conductive and the pole tips serve as the electrical leads to provide electrical current in a direction generally perpendicular to the layer of resistive heater material. In a current-in-the plane (CIP) embodiment, the spacer layers are formed of insulating material and electrical leads are formed as portions of a film between the spacer layers and in contact with each side of the resistive heater. The width of the resistive heater is less than the width of the pole tips. Thus since only the region of the magnetic layer on the disk that is heated by the resistive heater can be written by the pole tips of the write head, the data track width on the disk is defined by the width of the resistive heater, not by the geometry of write head pole tips.
    • 热辅助磁记录磁盘驱动器通过在薄膜感应写头施加写入场的同时将盘上的磁性层的小区域加热到靠近或高于其居里温度来记录数据。 薄膜感应写头包括位于写入头的极尖之间的写入间隙中的电阻加热器。 电阻加热器被夹在位于写入头的极尖之间的第一和第二间隔层之间。 在电流垂直于平面(CPP)实施例中,间隔层是导电的,并且极尖用作电引线以在大致垂直于电阻加热器材料层的方向上提供电流。 在电流平面(CIP)实施例中,间隔层由绝缘材料形成,并且电引线形成为间隔层之间的膜的一部分并且与电阻加热器的每一侧接触。 电阻加热器的宽度小于极尖的宽度。 因此,由于只有由电阻加热器加热的磁盘上的磁性层的区域可以由写入头的极尖写入,所以盘上的数据磁道宽度由电阻加热器的宽度定义,而不是由 写磁头尖端的几何形状。