Homebrew PCBs

>
> Try moving the UV source a lot further from the artwork and PCB, so that 
> the
> exposure takes about 10 minutes. You aren't using enough exposure, so you
> are leaving a very thin film of resist on the tracks and with the 2 
> minutes
> exposure you don't have enough latitude to get it right. With about 10
> minutes exposure do some more testing to find the optimum exposure. I had
> some problems getting everything right when using Fotoboard 2, but now I 
> get
> excellent results every time. I use 13 minutes exposure with two UV 
> tubes at
> a distance of about 20 cm.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html
>


i too think there is still resist left due to not enough exposing.

try by scratching on a spot. if yu dip it in the etchant
and this spot gets dull and the "exposed" areas not then it is
as leon says...

ST