Valveless impedance micropump with integrated magnetic diaphragm

Biomedical Microdevices
Chia-Yen Lee, Zgen-Hui Chen

Abstract

This study presents a planar valveless impedance-based micropump for biomedical applications comprising a lower glass substrate patterned with a copper micro-coil, a microchannel, an upper glass cover plate, and a PDMS diaphragm with an electroplated magnet on its upper surface. When a current is passed through the micro-coil, an electromagnetic force is established between the coil and the magnet. The resulting deflection of the PDMS diaphragm creates an acoustic impedance mismatch within the microchannel, which in turn produces a net flow. The performance of the micropump is characterized experimentally. The experimental results show that a maximum diaphragm deflection of 30 microm is obtained when the micro-coil is supplied with an input current of 0.5 A. The corresponding flow rate is found to be 1.5 microl/sec when the PDMS membrane is driven by an actuating frequency of 240 Hz.

References

Dec 13, 2006·Biomedical Microdevices·Ling-Sheng JangChing-Cheng Hou
May 17, 2007·Biomedical Microdevices·Ling-Sheng Jang, Wai-Hong Kan

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Citations

Apr 24, 2014·Sensors·Yusheng JiangWeijia Wen

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