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To: JRH who wrote (15304)	1/16/2000 2:23:00 PM
From: unclewest	Respond to of 54805

I had contact with someone from HP who said that they do not use CREE products, and that CREE was not the clear cut leader in the industry. In fact, HP/Agilent uses "InGaN sapphire LED materials", FWIW.... they are getting SiC for LEDs from somewhere... do you know where if not cree? there are two references to hp using SiC for blue in the following link.... hp.com

To: JRH who wrote (15304)	1/16/2000 2:40:00 PM
From: RocketMan	Respond to of 54805

I had contact with someone from HP who said that they do not use CREE products, and that CREE was not the clear cut leader in the industry. In fact, HP/Agilent uses "InGaN sapphire LED materials", FWIW.... Maybe we are talking two different things here. The HP guy may have been referring to their overall LED production, not just their blue/green high-brightness LEDs. If so, it would be correct that "cree is not the clear cut leader in the industry", because the industry is not (yet) based on SiC. Now, about the SiC that HP/Agilent does use. I looked through Agilen't site the other day and found their family of LEDs, in which they stated that they use SiC for their blue/green LEDs. Sorry, I looked for it again, and couln't find it and did not bookmark it. If they don't get their SiC wafers from cree, who supposedly controls 90 to 95% of the world's production, they must get it from a small supplier. GE, Westinghouse, and Siemens have been said to have tried to develop SiC, there may be others. But cree supposedly can sell the 2" diameter wafers for $495, which is competitive with sapphire. So again if they are not getting the wafers from cree, they are getting them from a small manufacturer and paying more. Just my thoughts, based on some reading. I am not all that knowledgeable in this area. Addition: I just read unclewest's post, where he has a link to HP's use of SiC, so ignore my comment above about not being able to find the link. His is a different link, but confirms their use of SiC.