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Vibration Reduction Control of a Voice Coil Motor(VCM) Nano Scanner
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  • Vibration Reduction Control of a Voice Coil Motor(VCM) Nano Scanner
  • Vibration Reduction Control of a Voice Coil Motor(VCM) Nano Scanner
저자명
Jung. Jong-Kyu,Youm. Woo-Seub,Park. Kyi-Hwan
간행물명
International journal of precision engineering and manufacturing
권/호정보
2009년|10권 3호|pp.167-170 (4 pages)
발행정보
한국정밀공학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

This paper presents vibration reduction control of a voice coil motor (VCM) nano scanner. We had developed a VCM scanner. The scanner has flexure hinges structure. However, the VCM nano scanner has some problems of thermal drift and small damping compared to the PZT driven nano scanner. Especially, the small damping coefficient of the VCM scanner causes mechanical vibration when the control input signal is near to the resonance frequencies. Additionally, disturbance to the VCM scanner and electronic noise in the sensor also cause the mechanical vibration when they are near to the resonant frequencies. The mechanical vibration reduces the servo bandwidth as well as the accuracy, which deteriorates the AFM image of the samples. We design a pre-filter to reduce the signal applied to the VCM nano scanner and electronic noise in the sensor whose frequency is closed the resonant frequency of the VCM nano scanner. We measure the time and frequency response of the VCM scanner without using the pre-filter and with using the pre-filter. Finally, the topology images of a bare wafer are measured and compared using the AFM.