Lon,

What do the failed solder joints look like? i.e. do they look like they have
suffered mechanical damage or have they gone through another reflow perhaps.

Is it always the same component that fails?

Martin

===== Original Message from [log in to unmask] (TechNet E-Mail Forum.) at
10/05/00 12:02
>Hi,
>
>Is one of you technetters familiar with this problem:
>
>For a customer we produce a board (3 by 5 centimeters)with no more then 6
>smt components 1206. When they encapsule the board with a compound one of
>the components looses from the board. They put the compound on the board
>with 30-40 bar pressure and 150deg celsius temperature. It seems to me that
>the preesure causes a higher temperature then 150 deg.
>The customer says the soldering joints are bad , but we can't find any
>solderingproblems at all.
>
>Thanks in advance
>
>Lon Weffers
>Matas Electronics bv
>De Dieze 16
>5684PT Best The Netherlands
>www.matas.nl
>
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