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August 2021

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Subject:
Re: Strain or strain rate spec for PCBAs
From:
Roger Mack <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Roger Mack <[log in to unmask]>
Date:
Wed, 25 Aug 2021 19:27:54 +0000
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IPC-9704

Roger Mack

-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Rivera, Raye
Sent: Wednesday, August 25, 2021 14:22
To: [log in to unmask]
Subject: [EXT] [TN] Strain or strain rate spec for PCBAs

Hello Technetizens,

Does anyone know of a spec or criteria for acceptable strain or strain rate for a PCBA?

We are using strain gauges to understand how much strain is placed on a PCBA inside one of our products during typical shipping processes.

I know that IPC-TM-650, 2.4.41.2A tells how to measure coefficient of thermal expansion by this method, but I can't find anything about mechanical force, or how much is too much.

Best regards,
Raye Rivera
Quality Manager

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