GoKawiilSeoul Viosys starts mass production of rare-earth-free white LED chip
Seoul Viosys has begun mass producing a white light-emitting chip, called WICOP 3, that uses gallium nitride instead of rare-earth materials like YAG. The chip can be made as small as 10 micrometres and the company says it costs roughly half as much to produce as conventional white LEDs, which currently rely on rare-earth coatings over blue LED chips.