Q: Regarding LED epi wafer,does the price include fabrication of p and n metal contacts? If not, can you fabricate p and n contacts plus SiO2 passivation based on my design? This can turn to a bigger project.
A: Sorry, we can not offer fabrication of [...]
2018-06-06meta-author
Q: Regarding your red LED epiwafers, what about the top layer or cap layer on the epiwafer structure?
A: As before we have p+GaAs(several nanometers only) in the top layer, however these two years, due to technology innovation, and all foundry remove this layer [...]
2018-06-19meta-author
PAM-XIAMEN can supply GaAs wafer with EPD less than 5000/cm2.
Q: Could you please advise guaranteed EPD for below substrate and epi?
Gallium Arsenide wafers, P/E 2″Ø×380±25µm,
LEC SI c doped 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, [...]
2018-09-06meta-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
Q:Could you tell us also what type of 4-H polytype SiC sudstrate you are able to provide?
A: Sure.
2018-06-19meta-author
Q: Is it possible to use 4” non-patterned sapphire for fabrication?
A:Not possible, currently all the manufacturers swift to patterned sapphire based wafer, including us, however if you really need flat sapphire based wafer, we we can offer 2″ size.
2018-06-19meta-author