Forgive me for missing this one at the time, but I just noticed that Toshiba announced its intention to get out of GaN-on-silicon white leds by the end of last year (2015) The company had published some high-efficacy devices, and was working on 200mm wafers, but maybe yields were lower than Toshiba was comfortable with. ...
Toshiba gets out of GaN-on-Si leds
from ElectronicsWeekly http://www.electronicsweekly.com/blogs/led-luminaries/toshiba-gets-out-of-gan-on-si-leds-2016-06/
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