Craig, The IPC-2222 (5-2) document says D / 2 + All registration tolerances. D = Score width Hope this helps. Ken _____________________________________ Kenneth J. Wood Saturn PCB Design, Inc www.saturnpcb.com -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Craig Sullivan Sent: Wednesday, August 19, 2009 3:35 PM To: [log in to unmask] Subject: [TN] Minimum Conductor to PCB edge distance I can't seem to find this information in any IPC document, unless I am obviously overlooking it. We have a PCB customer designed with a trace close to the board edge (0.013"). However, when the board is scored for depaneling, the score width reduces the distance to around 0.005" - 0.007". Can anyone recommend a reference or design guideline that specifies something like this? Something that may specify how close features can be placed to the board edge? We have our own guidelines for DFA, and generally speaking, we've never run into anything this tight where it's become a cause for concern. But there's also a first time I suppose. Thanks in advance for the input. Craig --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------