Bob's research interests are in large-area electronic materials and devices, including amorphous silicon (a-Si), flat panel x-ray image sensors, and more recently, printed organic semiconductors, flexible electronics, nanowire devices, and solar cells. He is exploring: printing technologies that could replace the photolithographic techniques traditionally used to create thin-film transistors; and solution-based organic materials to create large-area transistor and sensor arrays. Bob’s previous work on digital x-ray imaging has been commercialized through PARC spin-off dPix, the world's leading source for high-resolution a-Si sensor arrays that provide the foundation for medical, industrial, military, and security X-ray imaging. dPix was acquired by Trixell (a Siemens Medical/ Phillips Medical/ Thomson-CSF joint venture), Planar Systems, and Varian Medical in 1999. Bob has over 75 patents and has been honored with the American Physical Society David Adler Award and The American Institute of Physics prize for Industrial Applications of Physics. He has published more than 350 papers and articles and has served as Associate Editor of both the Journal of Materials Research and Solid State Science and Technology. Bob has also served on the National Research Council Committee for Material Science and Engineering, as well as the ICAMS (International Conference on Amorphous and Microcrystalline Semiconductors) Program Committee and International Advisory Committee. Dr. Bob Street holds a Ph.D. and B.S. in physics, both from Cambridge University in England. He joined PARC in 1976.