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Wed, 25 Aug 2021 21:04:12 +0000 |
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Hello Raye,
automotive standard is maximum 1000µm/m, VW recommends 500µm/m max stress on PCBA line, depanelization is the worst, but some (AOI) PCB fixing systems are critical, too.
take care,
Torsten
-----Ursprüngliche Nachricht-----
Von: TechNet <[log in to unmask]> Im Auftrag von Rivera, Raye
Gesendet: Mittwoch, 25. August 2021 21:22
An: [log in to unmask]
Betreff: [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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