標題: A gap capacitance method for slider flying height measurement in near-field optical disk drives
作者: Chen, JW
Liu, TS
機械工程學系
Department of Mechanical Engineering
關鍵字: flying pickup head;near-field optical disk drive;flying height;gap capacitance
公開日期: 1-十二月-2004
摘要: In order to overcome the diffraction limit of conventional optical disk drives, and substantially increase data storage capacity and density, near-field optical disk drives remain to be realized. The slider of a flying pickup head in a near-field optical disk drive has to fly at a stable spacing above the disk surface. To sense the slider flying height, a gap capacitance method is developed in this study to measure capacitance variation between the pickup head and disk surface. The capacitance varying with the flying height is modulated by a Colpitts oscillator. Subsequent demodulation accounts for height variation of the flying pickup head. Measurement results of this method are verified by using a laser Doppler interferometer. (C) 2004 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.mechatronics.2004.06.008
http://hdl.handle.net/11536/25603
ISSN: 0957-4158
DOI: 10.1016/j.mechatronics.2004.06.008
期刊: MECHATRONICS
Volume: 14
Issue: 10
起始頁: 1141
結束頁: 1155
顯示於類別:期刊論文


文件中的檔案:

  1. 000224824700004.pdf