Victor,

try posting this on Designers Council, they might be able to tell you.

The only restriction I know of is when having V-scored edges, you need a 20 mil keep away for 0.062" thick boards and 0.030" for 0.093" thick. This is to avoid having the tool cutting into the copper.

I guess it all comes down to a minimum dielectric specing, particular to your design.

Regards,
Ioan

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Victor G. Hernandez
Sent: Monday, May 08, 2006 2:42 PM
To: [log in to unmask]
Subject: Re: [TN] IPC Standard msg4


Susan,
   Thanks for sharing the IPC sec/par.   I too have experience that some
criterions are not carried forward as Rev is being updated by IPC.   It
appears that the IPC STD have been relaxed.

Victor.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Susan Mansilla
Sent: Monday, May 08, 2006 1:21 PM
To: [log in to unmask]
Subject: Re: [TN] IPC Standard msg4

Here is a paragraph from the old IPC-D-275 that provides a measurement.

Could not find a similar para in IPC-2221

5.3.1.4 Edge Spacing Except for edge-board contacts,
the minimum distance between conductive surfaces and the
edge of the finished board shall not be less than the minimum
spacing specified in Table 3-1 plus 0.4 mm [0.016
in]. Printed boards that slide into guides shall have a minimum
external conductor to guide distance of 1.25 mm

Susan Hott
Robisan Lab

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