Thanks Steve,
you are a most reliable source, will do check.
/Inge
--------------------------------------------------
From: "Steve Gregory" <[log in to unmask]>
Sent: den 12 March 2010 13:15
To: "'Inge'" <[log in to unmask]>; <[log in to unmask]>
Subject: RE: [TN] Vibration issue
> Hi Inge,
>
> What about corner staking with Scotchweld DP-190?
>
> http://tinyurl.com/ygt3lb2
>
> It's pretty solvent resistant, and I've used it to bond/stake lots of
> components on military hardware, mostly armored vehicle stuff.
>
> Steve
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
> Sent: Friday, March 12, 2010 3:52 PM
> To: [log in to unmask]
> Subject: Re: [TN] Vibration issue
>
> Chris ,
> acrylic is not accepted by the customer, because it does not withstand the
> harsh environment (alcohol from de-icing wings, nor jet petrol and other
> stuff)
> Inge
>
>
> From: [log in to unmask]
> Sent: den 12 March 2010 11:00
> To: Inge
> Cc: [log in to unmask]
> Subject: Re: [TN] Vibration issue
>
>
> Is acrylic conformal coat a possibility for you? Has solved some vibration
> issues for us.
> Best Regards,
> -Chris
>
> Inge <[log in to unmask]>
>
>
> Inge <[log in to unmask]>
> Sent by: TechNet <[log in to unmask]>
> 03/12/2010 01:47 PM Please respond to
> Inge <[log in to unmask]>
>
>
>
> To
> [log in to unmask]
>
>
> cc
>
>
>
> Subject
> [TN] Vibration issue
>
>
>
> 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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