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To: John Walliker who wrote (1991)	2/10/2000 8:03:00 PM
From: unclewest	Read Replies (2) \| Respond to of 10713

hi john, am i glad you showed up here... mike

To: John Walliker who wrote (1991)	2/11/2000 1:40:00 AM
From: wildhart	Respond to of 10713

John you wrote >>Switching costs for blue LEDs and lasers may not be huge. However, when SiC is designed into high voltage switchgear and high-power microwave transistors it will be possible to dispense with expensive cooling systems. Any return to conventional technology would then require a total re-engineering of such systems, greatly increasing their size back to current dimensions (space which will by then have been used for other things) and hence giving rise to substantial switching costs.<< John, that is very interesting. So essentially if SiC is used as the semiconductor in this application then only SiC could be used going forward, as opposed to substituting SiC with some other composite semiconductor? Wildhart