DICK LURIA / SCIENCE PHOTO LIBRARY DICK LURIA / SCIENCE PHOTO LIBRARY
A gallium arsenide (GaAs) wafer being heated inside a scanning auger electron spectrometer. This machine tests the wafer for purity before it is passed through the superconductor manufacturing process. The wafer will later be placed in a molecular beam epitaxy system, where molecules of various elements are implanted into the GaAs lattice structure.
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