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Polar Light Technologies (PLT) — which stems from research by founder professor Per-Olof Holtz and his team at Linköping University (with support from Sweden’s innovation agency Vinnova) — has fabricated 625nm-wavelength red-light-emitting pyramidal micro-LED based on its non-etching bottom-up concept. The firm has hence achieved red, green and blue pyramidal micro-LEDs using the same material compound...