White light from LED Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : White light from LED

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: kinkblot who wrote (93)	12/5/1999 9:40:00 AM
From: John Finley	Read Replies (1) of 565

There are some things I'm wondering about SiC. Nice specs at : cree.com It's a pdf file with lots of interesting stuff. I need to do some homework to find out: 1) What the heck are "micropipes"? 2) Do they degenerately dope the SiC and that makes it a conductor? 3) Why off-axis cuts? They can't grow epi on-axis? I guess this whole thing of making a material with a bandgap of ~3eV into a sufficient conductor w/o modifying the lattice has me scratching my head. Granted I've been out of the loop for awhile and don't have access anymore to all the references I used to use..... (I'm going to bite the bullet one of these days and BUY Sze, the CRC, and a few others.) Re: >>The old proprietary buffer layer trick... << Yeah, CeO2 is the "magic buffer" for superconductors (SrTiO3 is OK and MgO on M-plane sapphire) but I don't think anybody patented those, just the noble metal contacts and bicrystals for making weak links <g>. Did you see Cree said they got >15 minutes continuous with their blue laser <g>. They also mention HBTs.... Also, Will, thanks for the Forbes links. I must've missed the first one. It's good to know Nichia is still making money off Nakamura's work! I'll read the other link today. JF

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next