Flexible Printed Circuit Board as Novel Electrodes for Acoustofluidic Devices

Chao Sun; Roman Mikhaylov; Richard Fu; Fangda Wu; Hanlin Wang; Xichen Yuan; Zhihua Xie; Dongfang Liang; Zhenlin Wu; Xin Yang

doi:10.1109/ted.2020.3039760

Flexible Printed Circuit Board as Novel Electrodes for Acoustofluidic Devices

Chao Sun, Roman Mikhaylov, Richard Fu, Fangda Wu, Hanlin Wang, Xichen Yuan, Zhihua Xie, Dongfang Liang, Zhenlin Wu, Xin Yang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Surface acoustic wave (SAW)-based acoustofluidics shows broad applications in biomedicine and chemistry. Conventional manufacturing process for SAW devices uses photolithography and metal deposition, thus requires accessing cleanroom facilities. This study presents an efficient and versatile technique based on a flexible printed circuit board (FPCB) for developing SAW acoustofluidic devices. By mechanically clamping interdigital electrodes (IDEs) made on the FPCB onto a piezoelectric substrate, SAWs can be effectively generated with an additional matching network. The SAW amplitudes were measured by a laser vibrometer, which increases with the applied input voltage. The FPCB-SAW device has been applied to actuate 10- μm microspheres to form strong streaming vortices inside a droplet, and to drive a sessile droplet for transportation on the substrate surface. The use of the FPCB rather than a rigid printed circuit board (PCB) can help cut down on the overall footprint of the device and save space. The low requirement in assembling the FPCB-SAW device can facilitate versatile acoustofluidic applications by providing fast prototyping devices.

Original language	English
Pages (from-to)	393-398
Number of pages	6
Journal	IEEE Transactions on Electron Devices
Volume	68
Issue number	1
Early online date	8 Dec 2020
DOIs	https://doi.org/10.1109/ted.2020.3039760
Publication status	Published - 1 Jan 2021

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title = "Flexible Printed Circuit Board as Novel Electrodes for Acoustofluidic Devices",

abstract = "Surface acoustic wave (SAW)-based acoustofluidics shows broad applications in biomedicine and chemistry. Conventional manufacturing process for SAW devices uses photolithography and metal deposition, thus requires accessing cleanroom facilities. This study presents an efficient and versatile technique based on a flexible printed circuit board (FPCB) for developing SAW acoustofluidic devices. By mechanically clamping interdigital electrodes (IDEs) made on the FPCB onto a piezoelectric substrate, SAWs can be effectively generated with an additional matching network. The SAW amplitudes were measured by a laser vibrometer, which increases with the applied input voltage. The FPCB-SAW device has been applied to actuate 10- μm microspheres to form strong streaming vortices inside a droplet, and to drive a sessile droplet for transportation on the substrate surface. The use of the FPCB rather than a rigid printed circuit board (PCB) can help cut down on the overall footprint of the device and save space. The low requirement in assembling the FPCB-SAW device can facilitate versatile acoustofluidic applications by providing fast prototyping devices.",

author = "Chao Sun and Roman Mikhaylov and Richard Fu and Fangda Wu and Hanlin Wang and Xichen Yuan and Zhihua Xie and Dongfang Liang and Zhenlin Wu and Xin Yang",

note = "This work was supported in part by the Natural Science Basic Research Program of Shaanxi Province under Grant 2020JQ-233, in part by the Fundamental Scientific Research of Central Universities under Grant 3102017OQD116, in part by the Engineering and Physical Sciences Research Council Fellowship under Grant EP/P002803/1 and Grant EP/P018998/1, in part by the Global Challenges Research Fund, and in part by the Royal Society under Grant IEC/NSFC/170142 and Grant IE161019. The review of this article was arranged by Editor M. M. Hussain. ",

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AU - Yang, Xin

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N2 - Surface acoustic wave (SAW)-based acoustofluidics shows broad applications in biomedicine and chemistry. Conventional manufacturing process for SAW devices uses photolithography and metal deposition, thus requires accessing cleanroom facilities. This study presents an efficient and versatile technique based on a flexible printed circuit board (FPCB) for developing SAW acoustofluidic devices. By mechanically clamping interdigital electrodes (IDEs) made on the FPCB onto a piezoelectric substrate, SAWs can be effectively generated with an additional matching network. The SAW amplitudes were measured by a laser vibrometer, which increases with the applied input voltage. The FPCB-SAW device has been applied to actuate 10- μm microspheres to form strong streaming vortices inside a droplet, and to drive a sessile droplet for transportation on the substrate surface. The use of the FPCB rather than a rigid printed circuit board (PCB) can help cut down on the overall footprint of the device and save space. The low requirement in assembling the FPCB-SAW device can facilitate versatile acoustofluidic applications by providing fast prototyping devices.

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Flexible Printed Circuit Board as Novel Electrodes for Acoustofluidic Devices

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