On Tue, Aug 21, 2012, at 09:59 AM, Jason White wrote: > > Is that really optional? I can't think of any upside for leaving it out= .. > > I welcome any thoughts on it. > > > > Thanks, > > Bob >=20 > Wouldn't it free up space for routing traces beneath the chip ? Only if I used tented vias (filled with resist). I don't like having bare vias under conductors. And even if I spec tented vias, quite often that gets changed in later production runs (another story, arghh!). Thanks! Bob --=20 http://www.fastmail.fm - One of many happy users: http://www.fastmail.fm/docs/quotes.html --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .