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    • 70. 发明申请
    • CPP-GMR SENSOR WITH CORROSION RESISTENT SPACER LAYER AND HIGHER SIGNAL/NOISE RATIO
    • 具有腐蚀电阻间隔层和高信号/噪声比的CPP-GMR传感器
    • US20130052484A1
    • 2013-02-28
    • US13222827
    • 2011-08-31
    • Jeffrey R. ChildressJohn C. ReadNeil Smith
    • Jeffrey R. ChildressJohn C. ReadNeil Smith
    • G11B5/33B05D5/12
    • G11B5/3906B82Y10/00G11B2005/3996
    • A method and apparatus for increasing the electrical resistivity and corrosion resistance of the material forming a spacer layer in current-perpendicular-to-the-plane (CPP) giant magnetoresistive (GMR) sensors. The increased resistivity of the spacer layer, and thus, the CPP-GMR sensor permits a larger voltage across the sensor and a higher signal-to-noise ratio. The increased corrosion resistance of the spacer layer minimizes the effects of exposing the spacer layer to corrosive materials during fabrication. For example, adding tin to silver to form a metallic alloy spacer layer increases the corrosion resistance of the spacer layer and the electrical resisitivity of the CPP-GMR sensor relative to a spacer layer consisting solely of silver. The Ag—Sn alloy permits a larger current to flow through the sensor, which increases the signal-to-noise ratio.
    • 一种用于增加在电流垂直平面(CPP)巨磁阻(GMR)传感器中形成间隔层的材料的电阻率和耐腐蚀性的方法和装置。 间隔层以及因此CPP-GMR传感器的电阻率增加允许传感器两端的电压较大,信噪比更高。 隔离层增加的耐腐蚀性最小化在制造期间将间隔层暴露于腐蚀性材料的影响。 例如,将锡添加到银以形成金属合金间隔层增加了间隔层的耐腐蚀性和CPP-GMR传感器相对于仅由银构成的间隔层的电阻率。 Ag-Sn合金允许更大的电流流过传感器,这增加了信噪比。