Hello all, Just a question: If there is exposed edge copper, which is NOT electrical stuff, would it be allowed or tolerable? I used to put different non-electrical, sufficiently isolated dummy pads on inner layers directly on the board edge, staggered like a stair, which get milled apart later and thus allow to check the correct layer order and stackup with a simple magnifying glass, but learned that the board manufacturers don't like any kind of exposed copper and would remove this anyway. Regards Matthias On 3 Jun 2013 at 12:06, James Jackson wrote: > Is there an IPC callout for exposed edge copper? > > I seem to remember it not being allowed, but cannot locate an actual > statement in any of the IPC documentation. > > What I am referring to is when you have a negative copper plane (or > copper pour) on an internal layer that extends to the edge of the PCB. > When it gets fabricated, there would be a small line of internal > copper for each of the planes that extend to the edge of the PCB - > which could be shorted together, if a metal object were brought into > contact with the exposed copper. > > Any thoughts? > > Regards, > > James Jackson > Oztronics -- Matthias Mansfeld Elektronik * Printed Circuit Board Design and Assembly Neithardtstr. 3, D-85540 Haar, GERMANY Phone: +49-89-4620 0937, Fax: +49-89-4620 0938 E-Mail: [log in to unmask] Internet: http://www.mansfeld-elektronik.de ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 16.0. To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------------