Q: I am not sure whether practically LLO can be done on the PSS given it is not a flat surface
A: “laser lift-off” actually is according to “NL layer” as below image. If the NL layer is GaN layer, when it is heating to constant high [...]
2018-06-19meta-author
Q:We request for the following items
1. Silicon (Si) single crystal wafers, polished on one side N-type, orientation<100>, Resistivity 5E-3 ohm.cm, Thickness: 0.1 to 0.5 mm
2. Silicon (Si) single crystal wafers, polished on one side P-type, orientation <100>, Resistivity 5E-3 ohm.cm, Thickness: 0.1 to 0.5 [...]
Q: What is the minimum batch size for blue LED wafers on 4 inch sapphire (patterned sapphire)?
A:5pcs is ok, but the price would be higher.
2018-06-19meta-author
Q: Please let us know if you could supply below wafer, qty 25/50/300.
Gallium Arsenide wafers, P/P
150.00±0.25 mm) 6″Ø×650±25µm,
VGF SI undoped GaAs:-[100-2.0°towards[110]]±0.5°,
u > 4,000cm²/Vs,
Both-sides-polished, 1 Flat 57.5±2.5 mm @ 110±°1,
TTV<7µm, BOW<4µm, Warp<10µm, TIR<6µm,
Certificate: obligatory, Sealed under nitrogen in single wafer cassette
A: Yes, will check the [...]
2018-09-13meta-author
Q:As to the wafer dicing – is it possible to get a non-rectangular dicing? such as 6mm x 8mm size?
A:No problem, any size is workable.
2018-06-19meta-author
Q:Do these 2” PSS LED wafers have the same epi-stack as the 4” PSS? If not, please send me the diagram with thicknesses. Wavelength can be same: central 455nm
A: the 2″ detail layer thickness and structure is same as 4″, no any difference. Wavelength:455nm+/-5nm [...]
2018-06-19meta-author