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From: pgc@csadfa.cs.adfa.oz.au (Phil Clark)
Newsgroups: sci.electronics
Subject: Re: Blue LED
Summary: Blue LEDs
Message-ID: <1988@ccadfa.adfa.oz.au>
Date: 25 Oct 90 06:34:09 GMT
References: <3534@mindlink.UUCP> <12630655371015@osu-20.ircc.ohio-state.edu> <3681@dciem.dciem.dnd.ca>
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In article <3681@dciem.dciem.dnd.ca>, king@dciem.dciem.dnd.ca (Stephen King) writes:
> In article <1990Oct18.035324.10362@ariel.unm.edu> ee5391aa@hydra.unm.edu (Duke McMullan n5gax) writes:
(Stuff deleted)

- Be glad you don't live up here in Canada, where these little critters are
- costing me $32.46 EACH (Canadian dollars).

- >They'll get cheaper fast, when production yields rise and demand increases.
- >They remain a curiosity at this point...you'll see _very_ few specified as
- >manufacturing components.

- Not according to Siemens, the only manufacturer of blue LEDs that I know
- of. Apparently, it is not possible to manufacture large slabs of silicon
- carbide of the form necessary for making the LEDs. Unfortunately, I can't
- find my Siemens opto-electronic manual at the moment, so I can't quote from
- it. 

I saw somewhere recently that someone (I think it was IBM) had developed a 
Blue solid state laser diode. This was apparently done using frequency
doubling techniques and they claimed efficiency of something like 10%.

Has anyone seen anything about this and any idea of the cost yet?


Phil Clark               Department of Computer Science,        Phone: 
(VK1PC)                  Australian Defence Force Academy,      +61 6 268 8157
Email:                   Northcott Drive, Campbell,             Fax:
pgc@csadfa.cs.adfa.oz.au Canberra, Australia, 2600.             +61 6 268 8581