>I need to do several prototype PCBs for high power LEDs on something like
>Bergquist Thermalclad board.  I work with an engraving company that does
>very high precision work.  They have the capability to engrave the circuit
>board traces without going through the dielectric then they can do my
>mounting holes and cut all the way through the aluminum substrate.
>
>I would get better results and spend less money if I could etch the copper
>layer instead of having them cut the traces.  Does anyone know if it is
>possible to etch this material without hurting the aluminum substrate and
>what chemical would be best to use for etching?
>
>I have been unable to find a PCB house that does prototypes and small volume
>production for a reasonable price.  Bergquist will only do a full 18" X 24"
>panel for over $2,000, but I can buy blank panels for under $50 each.  From
>what they tell me, the PCB houses do not do their materials in house, they
>buy them finished and als have to buy full panels.  Any other suggestions
>for getting these boards in small quantities ag good prices is welcome.

These people do photoresist alu clad which you could photo-etch yourself :

http://www.cif.fr/new/produits_aff.php3?cat=1&scat=3&sscat=89&p=211

	

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