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