What wafer size do you provide with flat sapphire substrate?_Epitaxy_FAQ_Compound semiconductor wafer

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Q: What wafer size do you provide with flat sapphire substrate?

A:Currently we still can offer 2" wafer on flat sapphire substrate.

I am not sure whether practically LLO can be done on the PSS given it is not a flat surface
Q:We are using 40x40 mil size and 45x45 mil size chips for 1W . And 45x22 or 38x22mil size for 0,5w . Eff. is min. 120lm/w , package form is 3535 ceramic no lens flat type, and 5050 smd flat type. Cct 6500k, cri min 70-75, drive current 350 mA ( it c
Q: What is the minimum batch size for blue LED wafers on 4 inch sapphire (patterned sapphire)?
Q:What is the highest temperature and the highest thermal shock that the wafers can withstand?

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