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March 2009

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Subject:	Re: Traces and vias under components
From:	Charles Gervasi <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Wed, 18 Mar 2009 09:15:29 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (40 lines)

I hope you tell us what they are trying to accomplish with this requirement once you find out.  I'm curious to know what's behind it.  Maybe they just mean no traces under discrete caps or something.

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of wheels
Sent: Wednesday, March 18, 2009 9:44 AM
To: [log in to unmask]
Subject: [DC] Traces and vias under components

Guys,

We have a customer which we are designing a mostly SMT board for that 
requires all traces and vias not to be under components. This would also 
include any planes being under the components. I guess in the past they had 
a board designed by some else that had a shorting problem with traced and 
vias under the components. They are insistence that this is the way it has to 
be. Has anyone else had experience with this sort of demands? This is not for 
space, military, high voltage, high vibration or a medical application. Can 
anyone think of anything we could tell they to change their mind?

Thank you, 
wheels

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