Re: gEDA-user: Results of CustomPCB build of FLEX board

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

For photo imagable solder mask, I think, the minimum is 5 mills wide. 
0.5 mm is 19 mills and so should be easy.

For silk screened solder mask, I imagine, the bridge must be a lot
wider. Any idea of which process your vender uses DJ?

Steve Meier

DJ Delorie wrote:
> Cool.
>
> About solder masks: I usually set those to the closest to the pad that
> the vendor allows, which usually means 1.5 mil or so away.  Worst
> case, have the mask edge halfway between the pin and the plane.
>
> I never trust the library's mask or clearance, I always bulk-update
> them once they're on the board.  Yeah, it's something we need in the
> vendor and drc functions, as what I update them to depends on where
> I'm sending it to be made.
>
> For fine-pitch parts, I usually don't bother with mask between pads.
> However, 4pcb can do mask between 0.5mm pitch pads (seemingly
> perfectly, too, although I didn't spec them as tight as they
> produced!)
>
> Some of the "round" copper bits look jaggie.  Is that the scanner, the
> design, or the board?
>
>
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