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To: John Finley who wrote (348)	9/7/2000 8:19:54 AM
From: John Finley	Read Replies (3) of 565

A quick search of the substrate folks shows that lithium aluminate is a common III-V substrate. mkt-intl.com Using the crystal face to grow M-plane GaN is the difference, I guess. I'm having trouble visualising the static field problem however. I'm unclear as to whether its a piezoelectric effect caused by mismatch strain or some more localized charges caused by a polarity in a GaN direction.... Actually, rereading it, it sounds like a different phase altogether. Growing it may be a problem for deposition systems other than PE-MBE. Anyway, I'm sure that the big players have tried their hand at growing M-plane using their sledgehammer MOCVD systems. Something tells me they won't publish their results <VBG>. If this pans out and if LiAlO2 is as much a pain in the butt to grow as SiC we may have another CREE-type opportunity. Probably not. Hey Will, does AXTI do lithium aluminate? JF

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