Q:Dislocation density < 1E8 of GaN on sapphire from what kind of characterization?
A:Considering edge dislocation and mixing dislocation and then abtained by XRD
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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.
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Q: After MOCVD, do you anneal the wafer for p-GaN activation?
Q: After MOCVD, do you anneal the wafer for p-GaN activation? A:Yes! We will anneal the wafer for p-GaN activation
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Q We actually want to check our reflectance (mirror type) measurement method on an LED structure on a PSS wafer. Would it be possible to get the same LED structure on both a PSS wafer and a single-side polished wafer so we can compare the two directly?
Q We actually want to check our reflectance (mirror type) measurement method on an LED structure on a PSS wafer. Would it be possible to get the same LED structure on both a PSS wafer and a single-side polished wafer so we can compare [...]
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The epitaxial wafer on pss substrate is attractive to me, so I want to know the overall efficiency it can deliver. Could you please tell me an efficiency number (lm/w or cd/A or EQE) of the device based on a structure similar to the picture in your email?
Q: The epitaxial wafer on pss substrate is attractive to me, so I want to know the overall efficiency it can deliver. Could you please tell me an efficiency number (lm/w or cd/A or EQE) of the device based on a structure similar to [...]
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Q: What is the minimum batch size for blue LED wafers on 4 inch sapphire (patterned sapphire)?
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Q:We want to know the refractive index of these SiC wafers?
Q:We want to know the refractive index of these SiC wafers? A:The refractive index is no=2.707, ne=2.755
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