>
>
> There are deepest manufacturing problems David.
> At really large density (small via rings) they must add tear drops (if
> there are not already there), and struggle with laser/mechanical
> drilled holes like 5-6mil (0.125-0.15mm) and routes/clearances below 4
> mil (0.10mm) where any acid trap becomes a mess.
> Only a few houses are able to do this even they claim it's
> manufacturable and they handle the technology. The best way is to do
> yourself the panelisation for such restrictive designs. Unfortunately
> sometimes the PCB houses does not gave you enough informations to
> adjust your design acordingly with their technology.


Yeah, I know.. :(

But if they mod my files, then I never get to know what needs to be changed,
and I don't even necessarily get to know what they are changing.
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