If you are buying board from Mega then I would recommend their Microtrak
board rather than the Fotoboard. It is the same price but it seems to be
more tolerant to over/under exposure and it seems to give better
definition. The only down side is that it takes over twice as long to
expose. You also need stronger developer.
Les
Leon Heller wrote:
>
>
> I use NaOH solution for developing (very cheap) and a UV exposure unit I
> built myself, with pre-coated boards (positive-working resist).
> Negative-working resist boards are difficult to find, you'd be better off
> making positives. The PCB manufacturers use negative-working resist as it
> gives better definition, but it's not really suitable for home use.
>
> If you want to buy everyting you need off-the-shelf, try Mega Electronics
> (UK).
>
> Leon
>
> Leon
>
>