I'm a proponent of plugging -- with solder! Not only does it stop the
contamination problem, but it is electrically and thermally desirable,
as well. However, it should be done from only one side unless you like
to see miniature Krakatoas.

Brian

Paul Baine wrote:
> Hello,
>
> One of our Design Engineers is designing a surface mount PCB
> assembly and would prefer not to have the via holes solder mask
> tented.  However, he is concerned that, if he does not call up
> solder mask tenting on his bare PCB drawing, foreign matter could
> find its way into a via hole and, if a component (e.g. an IC) was
> mounted over the via hole, the foreign matter might not be removed
> during the cleaning process.
>
> Has anyone had experience with this situation?  I would appreciate
> any help you could give me.
>
> Thanks very much in advance.
>
> Paul Baine
> Q.A. Manager
> C-Tech Ltd.
> Cornwall, Ontario, Canada
>
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