Ralph Nuzzo is a University of Illinois professor of chemistry who wants to use soft lithography instead of conventional photolithography for fabricating transistors on curved surfaces. He says the desire for a new patterning process is driven by the need to fabricate components over large formats with unconventional materials. Soft lithography is better for component fabrication on curved surfaces because the process is compliant and conforms to small surface irregularities. Soft lithography patterning techniques, such as micron-scale polymer molding, require that the mold be flexible enough to conform to the curvature of the substrate, but stiff enough to preserve the integrity of the pattern. Fabricating microstructures on spherically curved substrates required depositing thin films of aluminum, silicon, and silicon nitride. When the mold contacted the substrate, Nuzzo flowed polyurethane into the mold, cured it, and peeled away the mold. The resulting polyurethane pattern on the substrate measured 30 microns. Thin-film arrays deposited on spherically curved substrates have potential applications in optical detectors for taking pictures over a wide field of view. Contact Nuzzo at (217) 244-0809 or e-mail email@example.com.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.