Research Interests: Human–computer Interaction (HCI), Microelectromechanical systems (MEMS), Wearable Sensors.
Joseph Greenspun started his MS/PhD program in Electrical Engineering at UC Berkeley Fall 2012 with a concentration in MEMS under Kris Pister. Research efforts have focused on creating a MEMS device capable of fracturing micromachined barriers and membranes. He completed his B.S. in Electrical Engineering and Biomedical Engineering at Boston University, focusing in biomedical optics, in May of 2012.
Self-Destructing Silicon [BPN744]
Funded under the DARPA Vanishing Programmable Resources (VaPR) program, this project explores the
fundamental issues associated with making wireless sensor nodes disappear after achieving an
objective. The MEMS Hammer is a micromachined device capable of storing mechanical energy and
delivering that energy to a target. It has been used to fracture other microfabricated structures
made of silicon and silicon dioxide. The MEMS Hammer is capable of storing a wide range of
energies with the upper limit exceeding 10uJ. These devices have been characterized to determine
the tradeoffs among energy stored, total stroke, and layout area. The MEMS Hammer is being
developed for a variety of applications ranging from creating a self-destructing mote to
extending the effective lifetime of air-sensitive and moisture-sensitive sensors.