2009/1/19 Mark Robinson <
mark.robinson@...>:
> Juan EA7FNJ wrote:
>> Hi guys!
>> I''ve seen this: http://c4r0.skrzynka.org/_hv/index.php?page=lasers/cnc2
>>
>> I was thinking: why don't use this kind of laser to burn the
>> photoresist board. After you develop it and ready for the etch. I
>> knoww the CO2 laser but it's more expensive than a simple burn laser
>> from a DVD burner.
>
> A laser from a DVD burner should be quite adequate to expose photoresist.
I think Juan's contemplating burning the resist off, rather than exposing it.
I've got a 25W CO2 laser marker, (google synrad fenix) but no etching
gear here. If anyone wants to send me a bit of photoresist board, I'll
blast a few test images onto it at varying powers and send it back to
you for etching. Working area is credit card size, spot size is 180uM.
It'll almost certainly burn away the etch resist - but I don't know if
it will do odd thermal stuff to the remaining areas, and what the
effective resolution will be. It'll definitely not burn the copper,
with a puny 25W.
('Here' is Cambridge, England)
Steve