20mil is sufficient for soldering components without
having a soldermask, eg on selfetched pcb's.
Otherwise it can be lower.
Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
Tim Fifield wrote:
oh, I just thought of another question...
What is your (Protel user) preferred
The clearance for an internal power plane depends on the accuracy of the
plane alignment. 20 mils ahoould be sufficient, but check the spec with
the pcb vendor.
If it's just a via, and no lead gets soldered, then direct connect. If
you're soldering a component lead in the hole (i.e. to-220)
