Power Supplies For Wireless Integrated Microsystems (WIMS)

In this work, we developed a novel power supply for
the WIMS-ERC
(Wireless Integrated Microsystems - Engineering
Research Center,
Ann Arbor, MI) intraocular sensor (WIMS-IOS), an
autonomous and
implantable system. This device is representative of
a broad class of
microscale devices, whose full implementation in
environmental and
medical systems will require significantly smaller
power supplies;
presently, battery systems represent 85% mass and 50%
volume of
typical devices and they have intrinsically high
power (3.5-4.2V)
based on lithium chemistry which complicates
integration with low-
voltage MEMS, since it necessitates voltage
regulation. Our
underlying hypothesis was that selection of the optimum
electrochemistry and usage of physical vapor
deposition would
reduce intrinsic losses because of the high resulting
precision, while
allowing integration with chips because of more
benign processing
conditions to MEMS. They also offer potentially lower
cost than
existing systems.

Autorentext

Dr. Fabio Albano is Chief Manufacturing Engineer and co-founderof Sakti3. He received the diplôme d'ingénieur from INP of Grenoble in 2002 andthe M.S.E. and Ph.D. in Materials Science and Engineering from the University ofMichigan, Ann Arbor in 2004 and 2008, with a focus on battery materials under theguidance of Professor Ann Marie Sastry.

Klappentext

In this work, we developed a novel power supply forthe WIMS-ERC (Wireless Integrated Microsystems - EngineeringResearch Center, Ann Arbor, MI) intraocular sensor (WIMS-IOS), anautonomous and implantable system. This device is representative ofa broad class of microscale devices, whose full implementation inenvironmental and medical systems will require significantly smallerpower supplies; presently, battery systems represent 85% mass and 50%volume of typical devices and they have intrinsically highpower (3.5-4.2V) based on lithium chemistry which complicatesintegration with low-voltage MEMS, since it necessitates voltageregulation. Our underlying hypothesis was that selection of the optimum electrochemistry and usage of physical vapordeposition would reduce intrinsic losses because of the high resultingprecision, while allowing integration with chips because of morebenign processing conditions to MEMS. They also offer potentially lowercost than existing systems.