Wireless driven EWOD technology for a MEMS pond skater

Mita, Yoshio, Li, Yifan, Kubota, Masanori, Parkes, William, Haworth, Les, Flynn, Brian, Terry, Jonathan, Tang, T., Ruthven, Alec and Smith, Stewart (2008) Wireless driven EWOD technology for a MEMS pond skater. In: 38th European Solid-State Device Research Conference, 2008. ESSDERC 2008. IEEE, Piscataway, NJ, pp. 306-309. ISBN 978-1-4244-2363-7

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Official URL: http://dx.doi.org/10.1109/ESSDERC.2008.4681759

Abstract

A silicon swimming robot or pond skating device has been demonstrated. It floats on liquid surfaces using surface tension and is capable of movement using electrowetting on dielectric (EWOD) based propulsion. Its dimensions are 6 times 9 mm with a thickness of 380 mum. The driving mechanism involves the trapping of air bubbles within the liquid onto the hydrophobic surface of the device with the subsequent ejection using a recently reported Ta2O5 EWOD technology. The required driving voltage of ~15 V is low enough for RF power transmission, thus providing wire-free movement. A wired version has been measured to move 1.35 mm in 168 ms (a speed of 8 mm s-1). This low-voltage EWOD device, fabricated using a CMOS compatible process, is believed to be the worldpsilas smallest swimming MEMS device that has no mechanical moving parts. The paper also reports results of EWOD droplet operation driven by wireless power transmission and demonstrates that such a wireless design can be successfully mounted on a floating EWOD device.

Item Type: Book Section
Additional Information: This paper was presented at the 38th European Solid-State Device Research Conference, 15-19 Sept. 2008. Edinburgh.
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Yifan Li
Date Deposited: 26 Feb 2015 15:10
Last Modified: 10 Nov 2016 12:39
URI: http://nrl.northumbria.ac.uk/id/eprint/21230

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