Sam, One of the issues that's bitten me more often than I'm prepared to admit - Clearance around mounting holes. It's amazing how unfeasibly huge an M3 screw head looks when zoomed in on a PCB. Almost every time I'm doing a board I do a print to check that I really do need that much dead space, and every time it's true.
Another (related) issue is the clearance on inner plane layers. I had 100 boards manufactured once with a slight misalignment on the power plane. All the connections were ok, but the power plane was almost breaking through the wall of the mounting holes on one side. One or two screws cut sufficiently deeply into the side wall to cause a short to the chassis. Now I leave about 30 thou (as an aside - most PCB houses I speak to here in the UK always assume that I mean 'mm' if I say 'such and such mil', so I always say 'thou' - what's the convention?) Hope this helps Steve. P.S. Are you supposed to be using Protel with an email address like that? ;o) > -----Original Message----- > From: Samuel Cox "Sam" [mailto:[EMAIL PROTECTED]] > Hello everyone.. > What are the top Ten or twenty(now a days) DFM "Best Practices" process > steps, or checks or suggestions you might look for > to ensure a design is right the first time you send it to manufacturing.. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
