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| Date: | Fri, 12 Mar 2010 14:00:02 -0500 |
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Is acrylic conformal coat a possibility for you? Has solved some vibration
issues for us.
Best Regards,
-Chris
Inge
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03/12/2010 01:47 [TN] Vibration issue
PM
Please respond to
Inge
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ipnet.se>
Hi all,
we are making a very vital part for a aircraft builder. Problem with
TQFPs, some 200 legs. There are resonance peaks that kill the package legs.
Redesign is not to think of from the customer, so we must do something on
inside of the box. One solution (not popular) is to use a string of a glue
along the leg rows in order to lock them. Another is to place a vibration
dampening mat on one side of the board. That one is more tricky , but
there
is a US company with lots of stuff for that purpose. Anyone with
experience from this area? I should add that not all legs are broken, just
one or two after 100 hs of random vibration, but that is of course not
acceptable. BGAs would solve the problem, but there is no time for
redesign.
I'm sorry for coming with a serious message at this holy time of the week.
Thanks
/Inge
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