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February 2000

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Tue, 29 Feb 2000 08:37:58 EST
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Steve
My only addition to the mix is for you to detemine where the
"ferns" are located.  Under the solder mask or on top of the
mask.

This will tell you what process is most likely responsible for
the problem.

Of course if you have a crack in the mask - you could subsequently
contaminate under the mask too

A little detective work is needed

Susan Mansilla
Robisan Lab

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