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Flexible printed circuit board as novel electrodes for acoustofluidic devices

Sun, Chao, Mikhaylov, Roman, Fu, Yongqing, Wu, Fangda, Wang, Hanlin, Yuan, Xichen, Xie, Zhihua, Liang, Dongfang, Wu, Zhenlin and Yang, Xin 2021. Flexible printed circuit board as novel electrodes for acoustofluidic devices. IEEE Transactions on Electron Devices 68 (1) , pp. 393-398. 10.1109/TED.2020.3039760

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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 was measured by a laser vibrometer, which increases with the applied input voltage. The FPCB-SAW device has been applied to actuate 10-m 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 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0018-9383
Date of First Compliant Deposit: 3 December 2020
Date of Acceptance: 12 November 2020
Last Modified: 10 Feb 2021 03:00
URI: http://orca.cf.ac.uk/id/eprint/136748

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