Dan

High-energy spraying is the obvious answer but the parts would have to
be firmly jigged to prevent them from shooting about all over the place
and bashing themselves to pieces - unless you wish to shock test them at
the same time :-)

Ultrasonic cleaning with water is a hairy process because the cavitation
occurs preferably around dissolved gas nuclei, rather than on the parts
to be cleaned. In most cases, you need to degas the water.

What type of flux residues are you trying to remove?

The $64,000 question is do you NEED to clean the residues off? If so,
ask yourself why and try to think up a work-around? My biggest question
is water inside your non-hermetic cover???????

Brian

> "Dan R. Johnson" wrote:
>
> Anyone have any experience with aqueous cleaning of small parts? I
> have a need to clean "very" small populated pcb's (< .125" ) the
> problem is removing flux from the installation of a non-hermetic
> cover. We have tried ultrasonic without success. These parts are
> processed in small lots 1K or less. We also have a case of
> "fundsarelow" (I love that :)...)
> Dan

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