Fabrication and packaging processes have been developed for micro fuel cells. The fuel cells are either (i) Proton Exchange Membrane (PEMFC) or (ii) Solid Oxide (SOFC) in nature and can be utilized as source for on-chip power in IoT clusters located on autonomous platforms. For PEM Fuel Cells (PEMFC) we have developed (i) membrane electrode assembly structures based on PVDF-TrFE coated Nafion membrane, (ii)bipolar plates for fuel diffusion, and a (iii) Low Temperature Co-fired Ceramic (LTCC) packaging process. The present capabilities inherent to LTCC technology permits fabrication of 3-D multi-layer structures to realize microelectronic (heaters, sensors) and microfluidic (channels,reservoirs, valves) components. The devices can be operated at elevated temperatures (873K). For Solid Oxide Fuel Cells (SOFC) we have designed and implemented schemes for integration in an LTCC platform. Such an active packaging concept helps miniaturization of fuel cell as well as peripherals. In parallel to this, high temperature test kits have been developed in-house in order to determine multi-fuel performance. Recently, an US Patent (2015/0119719) has been awarded for development of a test protocol to monitor fluid-flow (nano-liter/min) in a PDMS tube, based on bubble time-of-flight (TOF) technique.. Flow rate variability as a function of channel hydraulic diameter has been measured. This invention has considerable promise in detection and mitigation of clots in peritoneal shunts, which help in the outflow of excess cerebro-spinal fluid from the brain to the abdomen.
Dr. Siddhartha Prakash Duttagupta obtained BTech (Honours) from IIT Kharagpur and PhD from University of Rochester, USA. He has previously held the position of Assistant Professor in Electrical and Computer Engineering, Boise State University, USA, and also Director of Technology, Solar Integrated Technologies, USA. At present he is an Associate Professor in Electrical Engineering at IIT Bombay. Dr. Duttagupta's research interests are in Micro/Nano-fabricated devices, and Integrated Electronic Systems. The R&D activity is supported by United States Army, DBT (India), Crompton Greaves (India), Nipro (Japan), and TCS. Dr Duttagupta holds two US patents (2018) and two Indian Patents (2018, 2016) and has filed for more than 20 patents in Micro/Nano-scale Transducers and in Green Power Circuits and Systems. He has authored five monographs on platform technologies in Fuel Cells, Body Area Sensing, Non Uniform Image Analysis, and Precision Cooling. The impact of 146 publications is reflected in 4332 citations (reference: Google Scholar).