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Subject:	Re: Compression Limit on FR4?
From:	Franklin D Asbell <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Franklin D Asbell <[log in to unmask]>
Date:	Thu, 12 Oct 2006 14:03:16 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (46 lines)

I've not read actual limits, but damage can indeed occur with excessive
torque. The excessive pressure will cause the glass and/or epoxy to
fracture, this may eventually lead to trace or interconnect damage/failure.

Franklin



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: Thursday, October 12, 2006 1:54 PM
To: [log in to unmask]
Subject: [TN] Compression Limit on FR4?

Does anyone know of any guidelines or recommendations that suggest a maximum
limit on compressing board material?

Can any damage occur by over-torque'n screws, for example?

I've never heard anyone discuss that...

Jack

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