AFAIK, it is not possible to solder through it. It has to be removed mechanically.
Brian
On 16 Dec 2003 at 7:34, Reuven ROKAH wrote:
> Thanks Brian.
>
> There is any hazards / risks during the process or rework (no cleaning
> is possible only heating by solder iron?) such fumes from the solder
> iron?
>
> Best Regards
>
> ROKAH Reuven
>
> e mail: [log in to unmask]
>
>
>
> Brian Ellis
> <b_ellis@PROTONI To:
> [log in to unmask] QUE.COM> cc:
> Sent by: TechNet Subject: Re: [TN]
> Conformal coating - PARYLENE DIMER DPX-C
> <[log in to unmask] >
>
>
> 15/12/2003 18:40
> Please respond
> to "TechNet
> E-Mail Forum.";
> Please respond
> to Brian Ellis
>
>
>
>
>
> By far the best protection of any kind of coating
> Very uniform thickness, even over sharp edges and points
> The vacuum/plasma reduces residual surface contamination, especially
> hygroscopic volatiles A bugger for rework Expensive GREAT!
>
> Brian
>
> Reuven ROKAH wrote:
> > Hi Perylene users,
> >
> > Can you share with your experience and inform the + and - of this
> process?
> >
> > I have last week visited one of the users site and it seems
> > promising.
> >
> > I have long experience with spraying systems and not vacuum systems.
> >
> > Best Regards
> >
> > Reuven
> >
> >
> >
> >
> > Graham Naisbitt
> > <Graham.Naisbitt@CON To:
> [log in to unmask]
> > COAT.CO.UK> cc:
> > Sent by: TechNet Subject: Re: [TN]
> Foreign material on top of the conformal coating
> > <[log in to unmask]>
> >
> >
> > 12/12/2003 18:02
> > Please respond to
> > "TechNet E-Mail
> > Forum."; Please
> > respond to Graham
> > Naisbitt
> >
> >
> >
> >
> >
> > Bruce
> >
> > If you are applying epoxies and other materials after conformal
> > coating, just be sure that the solvents (if any) are not affecting
> > the coating during their application and curing.
> >
> > Otherwise this should simply be regarded as a cosmetic issue.
> >
> > Cleaning after all these processes is unlikely to be a good option,
> > as
> the
> > coating will now be expected to withstand your cleaning
> > process...and surface cleaning using brushes, swabs etc., are only
> > likely to be moving the stuff around on the surface rather than
> > removing it.
> >
> > Hope this helps
> > --
> > Regards Graham Naisbitt
> >
> > [log in to unmask]
> >
> > Cell: 079 6858 2121
> > Office: +44 (0)1252 813706
> >
> > Concoat Limited - Engineering Reliability in Electronics
> >
> > NEW - HumiSeal 1H2O Bov Aerosol - NEW
> >
> > Web: www.concoat.co.uk and www.concoatsystems.com
> >
> >
> >
> >>Hey guys,
> >> I have be hit recently on a couple of occasions by the quality
> >> folks
> >>over "foreign material" that is present on CCA's after conformal
> >>coating. On quite a few boards we install heat sinks after CC and
> >>usually use an epoxy to aid in heat transfer as well as loctite on
> >>the mounting screws.
> >
> > I
> >
> >>have been gigged for the residuals (just smears really) whether it
> >>is on the solder pads or not. I know that we all are concerned with
> >>material left over directly on the solder connections, but I am
> >>having trouble
> >
> > with
> >
> >>this one from a logical standpoint. I mean lets face it, you
> >>definitely can't test for the presence of ionic contaminants or
> >>anything, but I know the general impression is the boards should be
> >>clean.
> >>
> >>I know the simple answer here is to clean up all the residuals (and
> >>everyone is instructed to do that), but there are times when stuff
> >>just happens.
> >>
> >>Your thoughts
> >>
> >>Bruce Stilmack
> >>GDLS-TO Manufacturing Engineer
> >>(850) 574-4773
> >>[log in to unmask]
> >>
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