JSPS Postdoctoral fellowship: MEMS Vibrational Energy Harvesters for Internet-of-Things Applications


A 2 year JSPS postdoctoral position opens at LIMMS, Tokyo from April 1, 2017

Application deadline : August 28, 2016

Details on ABG website

LIMMS (Laboratory for Integrated Micro Mechatronic Systems) is an international laboratory between the French CNRS (Centre National de la Recherche Scientifique) and Institute of Industrial Science (IIS), the University of Tokyo, located in Komaba, Tokyo. LIMMS has more than 20 years of experience in international cooperative research and has welcomed more than 160 researchers from France and Europe.

The principal investigator Professor Hiroshi Toshiyoshi and his colleagues at the Institute of Industrial Science (IIS) with the University of Tokyo, Tokyo, Japan are conducting research and development on MEMS (microelectromechanical systems) vibrational energy harvesters that earn electrical power of nearly 1 mW from discarded environmental vibration of around 0.1 G at frequencies lower than 50 Hz. Primary target of application is wireless sensor node for infrastructure monitoring or so-called wearable IoT (internet of things). Silicon micromachined oscillators are post-processed with permanent electric charges (electret) that induce electrical current when the suspended mass is mechanically excited by the incoming acceleration. The project is currently supported by the NEDO (New Energy and Industrial Technology Development Organization) of Japan as well as the JST (Japan Science and Technology Agency).

A postdoctoral researcher called for this project is either (1) to explore the silicon micromachining technology to develop MEMS energy harvester of high energy conversion efficiency and/or (2) to develop a complete wireless sensor node device by combining the finished MEMS energy harvester device with the power control IC chip and with the wireless system such as Zigbee.

The laboratory is very well equipped with the MEMS / silicon micromachining utilities and cleanroom facilities that are capable of performing the development of MEMS energy harvesters. A candidate researcher is inserted into a team of collaborators including Professor Gen Hashiguchi with Shizuoka University, Japan, to develop electret material development, Dr. Shimpei Ono with CRIEPI (Central Research Institute of Electric Power Industry), Japan, to develop ultra large capacity, and Mr. Hiroyuki Mitsuya with Saginomiya Seisakusho Inc., Japan, to industrialize the MEMS energy harvester in a coming few years.

Period of Postdoctoral Position:
Two years starting from April. 1, 2017~ 

Paid equivalent to the JSPS Postdoctoral position

Candidates for topic (1) (development of MEMS energy harvester devices) are expected to have hands-on skills in silicon micromachining processes including mask designing on CAD, photolithography, chemical processing with draft chamber, vacuum-processes such as evaporation, sputtering, CVD, oxidation, vacuum anneal, reactive ion etching (RIE), and high-aspect ratio deep RIE (DRIE). Skills in MEMS evaluation will help, too, if he/she has mastered operation of laser Doppler vibrometer (LDV), scanning electron microscope (SEM), and semiconductor parameter analyzer.

Candidates for topic (2) (development of wireless sensor node with MEMS energy harvester) are expected to have fab-less design skills in low-power electronic VLSI using Cadence, electrical circuit simulation, layout design, circuit development from discrete component level, and IC test on probe-station with electrical testing instruments. Matlab / LabView skills will be helpful.