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where do I get cheap wafers? - Page 2

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Posted by Eeyore on June 23, 2008, 10:12 am
 


coj wrote:


especially

Mea Culpa.



That's the one I was really thinking of. Apparently the solat business likes to
use
'scrap' IN wafers so presumably they'll have to then dope them themselves.



Do try Google anyway. You might be surprised what it pulls up. Remember to be
flexible and inventive with the search terms.



They could possibly do most of that more easily with mechanical 'polishing'.

I've worked on wafer etching machinery in the past btw. Just stay clear of the HF
mostly.

Graham


Posted by coj on June 23, 2008, 1:16 pm
 
Eeyore wrote:

especially

No worries, just think yourself lucky we don't have to do maths using
Roman numerals. I mean calculating in imperial units is difficult enough !

  > That's the one I was really thinking of. Apparently the solat
business likes to use

I heard that the solar industry is now bigger than the chip industry can
provide so they need to source their own supplies from the start. There
are various projects on refining or mixing metallurgical grade Silicon
(a lot cheaper but a lot more impurities) and it'll be interesting to
see how that develops.


I don't know if the original poster "pineappleCoward" is still here, it
was him/her that wanted the wafers. I could get a few wafers from my
contacts but I wouldn't be free to pass them on to third parties.


I was involved once in lapping of GaAs.

HF ? Very nasty stuff it is too.

--
coj

"But it's nothing to worry about; it's all part of growing up and being
British."

Posted by pineappleCoward on June 26, 2008, 1:40 pm
 
OK, I didn't realize it would be difficult to find wafers.  I was
hoping that someone here made their own cells and would have some
spares to sell.  As to what I wanted them for I'll just say I had an
idea I wanted to try out before I went to the expense of applying for
patent.  Oh well, I'll maybe try asking on other groups.

Posted by Eeyore on June 26, 2008, 3:32 pm
 

pineappleCoward wrote:


Google.

But it'll cost. Maybe less than you think though.

Graham



Posted by coj on June 26, 2008, 9:36 pm
 pineappleCoward wrote:


I doubt anyone here makes their own solar wafers, you need some
expensive equipment to do that well.

There's more solar cell capacity in the world than there are wafers to
start off with so there won't be that many spare.

I don't want to put you off learning but there are hundreds if not
thousands of experienced solar cell technologists around the world
trying to improve the performance, have you done a literature search to
see if your idea has already been done ?

If you are interested in solar cells then I would have thought that this
was the group to ask in as some people here are in or have been in the
solar industry.

--
coj

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