System chips in the future will have all of a product's electronic circuitry squeezed onto one chip -- including both logic and memory functions, which have so far been produced with incompatible chip-making techniques. A team from Mitsubishi Electric Corporation has shown how light from a krypton-fluoride laser can 'print' 0.12 micron transistors (1 micron =10 -6 m). Tomorrow's chips could spring an even bigger surprise by combining incompatible materials, such as silicon and gallium arsenide.
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