SI
SI
discoversearch

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 : Wolf speed -- Ignore unavailable to you. Want to Upgrade?

To: speedskier who wrote (5308)4/16/2001 10:17:52 PM
From: unclewest  Read Replies (1) | Respond to of 10714
 
skier,
i also want to hear John W's response.

i do not think the transition problem is in the SiC crystal. i believe cree is fine in that regard.

i believe the problem in the transition to 3" for LEDs is in epitaxy.

if cree has other markets for the 3" it may not matter.
uw



To: speedskier who wrote (5308)4/17/2001 4:59:25 AM
From: John Walliker  Read Replies (2) | Respond to of 10714
 
speedskier,

I have a follow up question - is this essentially the same crystalline structure as Cree uses in their 2" wafers?

Yes, the difference is that larger crystals are now being grown (hopefully more economically).

Both 4H and 6H are now available in 2" and 3" wafers. It seems that 4H is preferred for high-power radio frequency devices, although I believe that it is possible to make them using 6H as well.

John


HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2026 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News