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To: John Finley who wrote (349)	9/7/2000 8:27:09 AM
From: John Finley	Respond to of 565

Oh, and another feature that Ploog et al points out is that LiAlO2 can be selectively wet-etched from GaN..... Sure would beat polishing off sapphire <g>. JF

To: John Finley who wrote (349)	9/7/2000 9:20:48 AM
From: kinkblot	Respond to of 565

Some more LiAlO2 vendors crystal-gmbh.com coatingandcrystal.com The Ploogies say theirs was provided by Crystal Photonics, about which I could find nothing. These all seem to be low-key operations; I don't get the feeling that demand for these substrates is skyrocketing. AXT's expertise is in III-V compound substrates, so I doubt if they're looking at it. I wonder if lithium aluminate can be formed by combining dilithium crystals with transparent aluminum? Not that I have any... WT