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首页> 外文期刊>Magnetics, IEEE Transactions on >An In Situ Measurement Method for Electric Potential at Head-Disk Interface Using a Thermal Asperity Sensor
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An In Situ Measurement Method for Electric Potential at Head-Disk Interface Using a Thermal Asperity Sensor

机译：使用热粗糙传感器的磁头-磁盘界面电势的原位测量方法

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摘要

The electrostatic force at head–disk interface (HDI) becomes increasingly significant when the head–disk clearance is dropping into 1 nm scheme. Therefore, detecting and eliminating the electric potential in the HDI is a critical task for hard disk drives. To that end, this paper proposed an measurement method for electric potential at HDI using a thermal asperity (TA) sensor. When calibrating the electric potential, both dc and ac components of the external voltage were supplied to the disk. As a result, the output of the TA sensor to the first harmonic of the ac component was linearly increasing with the decrease in the dc components. Experimental results show that this method is more efficient and flexible than the traditional methods.
机译：当磁头磁盘间隙降至1 nm方案时，磁头磁盘界面（HDI）上的静电力变得越来越重要。因此，检测和消除HDI中的电势是硬盘驱动器的一项关键任务。为此，本文提出了一种使用热粗糙（TA）传感器的HDI电位测量方法。校准电位时，外部电压的直流分量和交流分量都提供给磁盘。结果，随着直流分量的减少，TA传感器对交流分量的一次谐波的输出线性增加。实验结果表明，该方法比传统方法更有效，更灵活。

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