What do we want ? we want the copper of the vias being covered with the
solder mask but the via holes open.

I add a solder mask expansion design rule that simply says the rules
attribut is -Minimum_Annular_Ring (what i use for the vias 10mil). This
means that the copper is covered but the hole is left open. Works
perfect for us, both sides of the pcb have soldermask on the vias.


Dipl.-Ing. (FH) Michael Schmitt
Baumer Ident GmbH
Entwicklung / Development Department
Hertzstr. 10
D-69469 Weinheim
Deutschland / Germany
Tel. +49 (0) 6201 9957 - 30
Fax. +49 (0) 6201 9957 - 99
E-Mail : [EMAIL PROTECTED]
Web: http://www.baumerident.com

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