Dr. George Metze Senior Electrical Engineer and Program Director Laboratory of Physical Sciences College Park, Maryland, 20740 National Science Foundation Directorate for Engineering Directorate for Geosciences Office of Polar Programs Dear NSF Smart Sensor Networks Program: I am writing to strongly express my support for the proposed work by Dr. Neil Goldsman and his colleagues on millimeter scale integrated smart sensor networks. We at the Laboratory of Physical Sciences (LPS) have worked with Dr. Goldsman’s group for several years, and have been consistently impressed with the high level of creativity, rigor and intellectual ability of the group. We have collaborated in detail with Goldsman and his colleagues on our 3D Integration program. In this program we are developing the process, the software, and the circuits for 3-dimensional integrated circuit development. We feel that small smart sensor networks are an ideal application for 3D IC integration, since it facilitates for the incorporation of various systems on the same chip. We will continue to work with Dr. Goldsman’s group in our 3D integration process. Our laboratory will support his effort in designing and fabricating 3D IC’s for the development of small smart sensors. We will continue to make arrangements for Dr. Goldsman’s group members to have access to our considerable processing and test equipment at the LPS. Thank you. Sincerely, George Metze