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Glide height testing using a glide head apparatus with a piezoelectric actuator
Glide height testing using a glide head apparatus with a piezoelectric actuator
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机译:使用带有压电致动器的滑行头设备进行滑行高度测试
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摘要
A glide head apparatus for testing surface characteristics of a disc includes a gimbal, a slider and an actuator including a piezoelectric material disposed between the gimbal and the slider. A voltage applied across the piezoelectric material is controllable to cause the piezoelectric material to expand or contract depending on the applied voltage so as to vary the fly height between the slider and a disc under test. The fly height can be varied without substantially varying the linear velocity of the disc under test. Methods of testing surface characteristics of a disc using the glide head apparatus also are disclosed.
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