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October 2003

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Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 24 Oct 2003 12:43:55 -0700
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text/plain (134 lines)
        It looks hawaiian all right, thanks for the info.

> -----Original Message-----
> From: Brooks,Bill [SMTP:[log in to unmask]]
> Sent: Friday, October 24, 2003 1:01 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] Cleaning of via holes under components
>
> http://images.amazon.com/images/P/0764004603.01.LZZZZZZZ.jpg
>
> Check out this link Ramon...It looks sort of Hawaiian...:)
>
> Bill Brooks
> PCB Design Engineer , C.I.D., C.I.I.
>
> -----Original Message-----
> From: Dehoyos, Ramon [mailto:[log in to unmask]]
> Sent: Friday, October 24, 2003 9:51 AM
> To: [log in to unmask]
> Subject: Re: [TN] Cleaning of via holes under components
>
>         Ellis:
>         Is it a Hawaiian animal?
>         Ramon
>
> > -----Original Message-----
> > From: Brian Ellis [SMTP:[log in to unmask]]
> > Sent: Friday, October 24, 2003 11:02 AM
> > To:   [log in to unmask]
> > Subject:      Re: [TN] Cleaning of via holes under components
> >
> > 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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