I’m on the same issue.
Preparing a touch activated drum machine.
see the next screen shot:
I put my finger contacts on the Top layer and duplicate the same drawing on the T stop layer to be sure this wires will be covered with surface finish and not with solder mask.
¿Is that correct?
By other side…
Will be the HASL finish reliable for this application? or will be necessary to choose Rosh HASL or ENIG? in other words… can HASL oxidate?
Here the “.brd” for reference:
dl.dropbox.com/u/7062739/Proyect … nBongo.brd
Thanks!!