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Silicon Surface

High Pressure Phase Transformations (HPPT) of Silicon, Germanium, and Silicon Nitride, John Patten, Ron Scattergood, George Pharr, and Robert Nemanich WMU, NCSU, UT-K; DMR-0403650, a FRG. Diamond.

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Silicon Surface

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  1. High Pressure Phase Transformations (HPPT) of Silicon, Germanium, and Silicon Nitride, John Patten, Ron Scattergood, George Pharr, and Robert NemanichWMU, NCSU, UT-K; DMR-0403650, a FRG Diamond • During this past year we concluded research on silicon, germanium, silicon nitride and pursued additional research on silicon carbide. Three important contributions during this past year include: • Infrared laser heating of the metallic HPPT (see image). • Determination of geometrical effects of indenter shape, and development of a model. • 3. Established a minimum damage depth of 2-3 nm for machining semiconductors and ceramics Silicon Surface Thermal Infrared camera image of HPPT of Silicon being preferentially heated by diode laser; IR laser beam passes through the diamond tip and into the silicon. Est. temperature 600 C (red)

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