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.
Leading manufacturer of compound semiconductor material in China
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.
Q:In the test report of blue LED wafers,it shows Vf and IV (mcd). How is this mcd being measured without actually processing the wafer into devices? A:We use prober equipment and contact positive and negative pole, connect current, and then get the voltage and IV.
Q: After MOCVD, do you anneal the wafer for p-GaN activation? A:Yes! We will anneal the wafer for p-GaN activation
Q: Could you please advise guaranteed EPD for below substrate and epi? Gallium Arsenide wafers, P/E 2″Ø×380±25µm, LEC SI undoped GaAs:-[100]±0.5°, n-type Ro=(0.8E8-0.9E8)Ohmcm, One-side-polished, back-side matte etched, 2 Flats, LT-GaAs EPI: 1-2µm, Resistivity >1E7 Ohm-cm, Carrier lifetime <1ps, Sealed under nitrogen in single wafer cassette. A: Dislocation Density<1×10^6cm-2
Q:Do you sell SiC wafers that are not (0001) plane? For example, (11-20)? A:We can offer a-plane, but the size would be smaller,and should require quantity, do you have size requirement?
Q: What is the highest temperature and the highest thermal shock that the wafers can withstand? A: At the temperatures higher than 1000 C on the free surface of Si-face of 6H-SiC (0001) the carbon segregation properties are started so that during short time the thin [...]
Q:We want to know the refractive index of these SiC wafers? A:The refractive index is no=2.707, ne=2.755