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Date: | Wed, 27 Oct 2010 07:29:43 -0500 |
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Good morning all,
I posted a picture to the IPC Technet gallery.
http://ipc-technet.groupsite.com/gallery/16251
This is taken from a failure analysis effort I am working on. Its amazing
what happens to electronics when you spill coffee into them.
One of the assemblies I have been looking at has a very odd visual effect
that I have never seen before. The conformal coating has a fluorescing
dye to it that glows blue under black light, which is common. Notice how
the fluoresence has disappeared from the areas over one set of traces. I
have seen fluorescence disappear before, but it usually heat releated and
over a large area, nothing highly localized like this. My first thought
was that there had been a jumper wire installed in these locations, but
that is not the case.
I showed this to my good friend Phil Kinner at Humiseal, who is no
stranger to the wierd and wacky world of conformal coating oddities, and
he has not seen anything like this either.
Anyone else seen this?
Doug Pauls
Maybe this could be one of Inge's Friday quiz items............
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