Brian,

Well said (again!!)

David A. Douthit
Manager
LoCan LLC

Brian Ellis wrote:

> 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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