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    • 9. 发明申请
    • Magnetic write head design for reducing temperature induced protrusion
    • 磁写头设计用于降低温度引起的突起
    • US20070247750A1
    • 2007-10-25
    • US11411590
    • 2006-04-25
    • Wen-Chien HsiaoYimin HsuEdward LeeVladimir NikitinKatalin Pentek
    • Wen-Chien HsiaoYimin HsuEdward LeeVladimir NikitinKatalin Pentek
    • G11B5/147
    • G11B5/1278G11B5/3133G11B5/3136
    • A magnetic write pole having a structure that prevents thermally induced pole tip protrusion. The write head has a return pole with a magnetic pedestal formed at the air bearing surface (ABS) and a back gap at an end opposite the ABS. An electrically conductive write coil having a plurality of turns passes over the return pole. A fill layer of a material having a low coefficient of thermal expansion, such as alumina is disposed between the coil and the pedestal, and may extend over the top of the coil to the back gap. A photoresist coil insulation layer may be provided between the turns of the coil to insulate the turns of the coil from one another. The photoresist coil insulation layer can also extend to the back gap. A write pole, formed above the return pole and coil is magnetically connected with the back gap layer and return pole by a magnetic shaping layer.
    • 具有防止热感应极尖突出的结构的磁性写入极。 写头具有在空气轴承表面(ABS)形成的磁性基座的返回极和与ABS相对的一端的后部间隙。 具有多个匝的导电写入线圈通过返回极。 具有低热膨胀系数的材料的填充层(例如氧化铝)设置在线圈和基座之间,并且可以在线圈的顶部延伸到后部间隙。 可以在线圈的匝之间设置光致抗蚀剂线圈绝缘层,以将线圈的匝彼此绝缘。 光致抗蚀剂线圈绝缘层也可以延伸到后隙。 在返回极和线圈之上形成的写极通过磁性成形层与后间隙层和返回极磁连接。