Re: gEDA-user: Re: Pointer to 3d CAD?

[John Griessen <john_g@xxxxxxxxxx>]

Dave McGuire wrote:
>   Are printed organic transistors ready for prime-time?  

Not quite.  Or at least, the processes that work well are kept secret, applied 
to small displays -- not necessarily easy in a garage shop.  But for some things 
where short lifetime is OK, there are recipes used by grad students these days.

As far as cheap, tested, long lasting, there's Conductive polymer material from 
Agfa.  It is maybe a product with 400 Ohms per square with carbon black in it, 
and a clear blue coating that is 600 Ohms per square transparent blue color. 
 That kind of material is what you make transistors out of too...  only Agfa 
did not respond to a request for prices.   They may be in trouble as a company, 
but it's close to being available as a cheap material -- priced like automotive 
paint, (but water based low toxic).   You process it with oven temperatures like 
 130 deg C.  has to be stored in a fridge 7 deg C to last more than 2 months.

Dow and Dupont and Philips have something too...but they seem to be after the 
big fish right now -- I haven't gotten them to talk.

John Griessen




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