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A Novel Transdermal Power Transfer Device for the Application of Implantable Microsystems

National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory of Shanghai Education Commission for Intelligent Interaction and Cognitive Engineering, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai 200240, China
Author to whom correspondence should be addressed.
Academic Editor: Paul Ronney
Micromachines 2015, 6(3), 396-408;
Received: 25 December 2014 / Revised: 4 March 2015 / Accepted: 18 March 2015 / Published: 23 March 2015
(This article belongs to the Special Issue Power MEMS)
PDF [1722 KB, uploaded 23 March 2015]


This paper presents a transdermal power transfer device for the application of implantable devices or systems. The device mainly consists of plug and socket. The power transfer process can be started after inserting the plug into the socket with an applied potential on the plug. In order to improve the maneuverability and reliability of device during power transfer process, the metal net with mesh structure were added as a part of the socket to serve as intermediate electrical connection layer. The socket was encapsulated by polydimethylsiloxane (PDMS) with good biocompatibility and flexibility. Two stainless steel hollow needles placed in the same plane acted as the insertion part of the needle plug, and Parylene C thin films were deposited on needles to serve as insulation layers. At last, the properties of the transdermal power transfer device were tested. The average contact resistance between needle and metal mesh was 0.454 Ω after 50 random insertions, which showed good electrical connection. After NiMH (nickel-metal hydride) batteries were recharged for 10 min with current up to 200 mA, the caused resistive heat was less than 0.6 °C, which also demonstrated the low charging temperature and was suitable for charging implantable devices. View Full-Text
Keywords: implantable; transdermal; power transfer; PDMS; Parylene implantable; transdermal; power transfer; PDMS; Parylene

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Liu, J.-Q.; Rui, Y.-F.; Kang, X.-Y.; Yang, B.; Chen, X.; Yang, C.-S. A Novel Transdermal Power Transfer Device for the Application of Implantable Microsystems. Micromachines 2015, 6, 396-408.

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