Tom,
Thanks for the information. I was able to download the Spirent DFM document. Our boards are no more complicated than theirs were in 2002. I think we're good.
Gary
>________________________________
> From: Tom Hausherr <[log in to unmask]>
>To: 'DesignerCouncil' <[log in to unmask]>; 'Gary Koven' <[log in to unmask]>
>Sent: Tuesday, February 26, 2013 10:49 AM
>Subject: RE: [DC] Edge spacing
>
>Gary,
>
>You need to update your standards to IPC-2221B and IPC-2222A.
>
>There is a DFM document created by Spirent Communications - PCB CAD Design
>Guidelines
>http://irtfweb.ifa.hawaii.edu/~ao/Electronic/Peter_dump/Electronics/System/T
>ext/PCBCADGuidelines.pdf
>
>This includes feedback from several PCB fabrication shops (TTM, Velie,
>Multek, DDi, ViaSystems, Fine Pitch).
>
>Its 10 years old, but it's a good guideline created by the "Performance
>Analysis Broadband Division of Honolulu Development Center".
>
>Tom
>
>Tom Hausherr
>President
>13730 Sorbonne Court
>San Diego, CA 92128
>858.592.4826 Office
>858.859.5371 Cell
>[log in to unmask]
>
>
>
>-----Original Message-----
>From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Gary
>Koven
>Sent: Tuesday, February 26, 2013 7:10 AM
>To: [log in to unmask]
>Subject: [DC] Edge spacing
>
>We design small form factor PCBs with board edge to copper spacing typically
>0.25mm (0.010").
>
>Thus far, no fabricator, whether our American prototype or our Asia Pacific
>production, has indicated this distance is a problem. Online prototype
>shops such as Advanced Circuits specify this distance as their minimum.
>
>
>Which IPC document addresses minimum edge spacing? My copy of IPC-2222 is
>15 years old, and I was not able to find this information in any other IPC
>specs on hand.
>
>
>
>TIA and Best Regards,
>
>Gary M. Koven, C.I.D.
>InVue Security Products
>
>Charlotte, NC, USA
>Board Of Directors, RTP Chapter
>
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