Matthias, If you plot the Gerbers with the option "plot holes" checked you will rub out a 0 mil annular ring as well as a i.e. 0.001 mil (which satisfies your DRC rule). So never plot the holes in Gerbers!
Hope this helps, Emanuel [EMAIL PROTECTED] wrote: > > Hi, > > I have a problem with vias on a 6 layer board with a stack up like: > > T > --P-- > 1 > --C-- > 2 > --P-- > 3 > --C-- > 4 > --P-- > B > > Among others a via type, from layer 1 to layer 4, witch is depending on the layer >stack, were used. But some of the vias were only connected on layer 1 and layer 3. >Our board manufacturer had problems with these ones, because these vias appeared >without the pad on layer 4 in the Gerber files. In other words, there was just a >metallized hole in the board. During the etching process these vias were destroyed. >All vias and tracks were manually placed and routed. > In DRC runs with Minimal Anular Ring Rule set >0 no violation were found. > > Does anyone out there know, how to fix this trouble or how to check the vias. Any >help would be welcome. > Thanks in advance. > > > Regards, > > Matthias Trebeck > > Infineon Technologies AG > Automotive Industrial > AI MC AC EMC > > fon: +49 89 636 83244 > fax: +49 89 234 723831 > > mailto:[EMAIL PROTECTED] > > **** VISIT US AT: http://www.infineon.com **** > > Mit freundlichen Gr��en > > Matthias Trebeck > > Infineon Technologies AG > Automotive Industrial > AI MC AC EMC > > fon: +49 89 636 83244 > fax: +49 89 234 723831 > > mailto:[EMAIL PROTECTED] > > **** VISIT US AT: http://www.infineon.com **** > -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% MPL AG www.mpl.ch Emanuel Zimmermann [EMAIL PROTECTED] Manager R&D Phone: +41 (0)56 483 34 34 Taefernstrasse 20 Fax: +41 (0)56 493 30 20 CH-5405 Daettwil %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
