On 18/06/2012 14:35, Electron wrote:
> I wonder if, to make for best results, should I make the holes larger tha=
n
> normal, else the tin won't be able to reach the opposite side of the PCB?

Most PCB manufacturing companies will take your gerber/drill files and=20
make holes of the requested size after plating.  So if your tool size=20
says 2mm then it will be a 2mm hole after it has been plated.  There are=20
a few weird exceptions (Olimex come to mind).

There is no reason I see to make holes bigger than you need, so long as=20
components aren't forced into tiny holes.  Depending on the finish you=20
don't want to ruin the through plating when reworking parts.

For an obvious example of small holes just think of vias.  I have been=20
using 13mil vias on recent boards which are by design through plated.

David
--=20
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