Now nikkei.net reports that Sumitomo has started to make and soon will start to sell sapphire substrates as the basis for white LEDs.
According to the report, the sapphire substrates will be polished with silica granules with diameters of a not very considerable 100 nanometres.
The report said sapphire will help the white LEDs be brighter and samples are already being shipped. µ
nikkei.net sub needed
Napier's Sapphire archive of Scottish publications
Chard and Corundum An attractive cabouchon sapphire
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