| From Hardassetsinvestor.com: Both gallium arsenide and gallium nitride are used in, amongst other things, integrated circuits (chips/microchips) - especially for mobile phones, LEDs, laser diodes, photodetectors and solar cells.
Gallium nitride is, in addition, used in amplifiers for cable TV and wireless communications base stations, certain advanced transistors, highly specialized chips and, perhaps a little closer to home, specifically in the blue laser diodes used in Blu-ray DVD devices..... Full Article: Source
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