Although this may be a triggerpoint for this phenomenon, it is by no means the only one. Just in the final stages of a design (P99SEsp6) the very same thing happened to me on the bottom layer.. No buried vias in this board, just 4 layers and the stack order is as suggested by Emanuel.
This usually happens to me on a much smaller scale (leaving only some tiny holes in the polygon in question) and most of the times it could be remedied by changing the fill type, track width, grid and/or minimum primitive size. Could (past perfect tense), because now I'm stuck... Some experimenting reveals that placing keepout items (be it objects with the keepout attribute set or objects on the keepout layer) in the polygon provokes the problem. Lines with the same orientation as the polygon hatching seem to be OK, fills cause serious problems (including hatching outside the polygon). Having all this said, I'm not nearer a solution than before. Any of the other masterminds on this forum? Leo At 14-8-2006 07:46, Emanuel Zimmermann wrote: >Brian > >This happens if you have resorted the layer order in the layer stack >manager. With blind/buried the order MUST be Top, Mid1, Mid2, Mid3 ... >Mid(n), Bottom. > >regards, Emanuel > >--- >MPL AG www.mpl.ch >Emanuel Zimmermann [EMAIL PROTECTED] >Manager R&D Phone: +41 56 483'34'34 >Taefernstrasse 20 Fax: +41 56 493'30'20 > >CH-5405 Daettwil >--- > >[EMAIL PROTECTED] wrote on 14.08.2006 01:13:20: > > > Screenshot: > > http://img147.imageshack.us/img147/1004/messeduppolygonsp7.png > > > > As you can see, the polygon fill has made a bunch of rectangular > > voids in weird places. > > > > This only happens when I attempt the polygon fill on layers 5 & 7 of > > my 8 layer PCB. > > > > Note that my PCB uses blind-buried Vias from top->even layers & > > bottom->odd layers. > > > > I remember seeing this few years back, however, I don't remember how > > I fixed the problem. > > > > ____________ > > Brian G. ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[email protected] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[email protected] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[email protected]
