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.
2018-06-19meta-author
Q:I was wondering if you carried any semi-insulating(not doped)SiC or single crystal HPSI SiC?
A: For our semi-insulating SiC substrate, it is V doped, we can not offer High Purity semi-insulating SiC, however we can offer undoped SiC if your quantity is good.
2018-06-19meta-author
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
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: 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
Q:Do you offer monocrystalline SiC or polycrystalline SiC?
A:We offer monocrystalline SiC currently.
2018-06-19meta-author