Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Thomas" <teecee@c...> wrote:
 
> This UV Laser thing has me thinking (dangerous I know)  so slap me 
for bringing this up !! but during a few search's I come across some 
info that uses a UV Laser Diode in a DVD-R Burner & goes on about 
Photoresist being part of the Layer that records the Data, if its 
similar stuff or not i dont know. Maybe the UV Laser is to small and 
possible the focal point could be changed  to get a wider beam for 
Exposure, sounds easy enough but I bet it aint !! 

Possibly more useful than Lasers, Non-laser UV LEDs are available on 
Ebay etc for around 10-20c each. They seem to work fine directly off 
2x1.5v AA cells. The beam is divergent at an angle of approx 20 
degrees on the ones I have. I would imagine that it would be 
focussable with relatively inexpensive lenses too, or get a bunch of 
fibre optics and adapt an old dot matrix printer :o)

Mike