Here is an interesting question.

We use Roederstein film capacitors (through hole configuration) in many
of our boards.  Typically all boards are run through our wave solder
machine with the same recipe.  The weird thing is that some of these
caps fail either open or shorted but only on the boards belonging to one
design engineer.  Is this "full moon residue", a circuit design issue or
is it possible a regular failure that no one else is complaining about?
We keep track of our test failures and if this were happening on many
other boards we should be seeing the data, but there is none.

I'm interested in what your thoughts may be.

Thanks in advance.

Phil Nutting

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