Wayne et al,
Actually many flux manufacturers claim to have conformal coating
compatible no-cleans. I know that Interflux do, I also know that
there are many products running no-clean with coating.
The issue however, is to verify how much residue is left behind and
whether they might cause a reliability issue. You will need to test
your process. IPC-TM-650 2.6.3.7 is designed to help you do that.
Kindest regards
Graham Naisbitt
[log in to unmask]
www.gen3systems.com
Phone: +44 (0)12 5252 1500
Mobile: +44 (0) 79 6858 2121
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On 23 Oct 2007, at 18:08, Thayer, Wayne wrote:
> Yes, but you have to qualify the heck out of it. So it makes sense if
> you have the budget for it, such as if you are planning to make 5
> million cars or so, but not for short, special runs such as is
> commonly
> the case with Class 3.
>
> Unfortunately, no one seems to both sell no clean flux and a
> compatible
> conformal coat.
>
> Also, the no cleans are problemmatic with rework--and short runs of
> class 3 often have rework on every single unit. The trouble is the
> flux
> is only de-activated if done in a very controlled way. The right
> reflow
> profile will do it, but how do you get that during rework?
>
> Wayne Thayer
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Zilber Gil
> Sent: Tuesday, October 23, 2007 12:45 PM
> To: [log in to unmask]
> Subject: [TN] No clean Flux for Class 3 products compatible with
> Conformal Coating
>
> Hello TechNet,
>
> Does anyone using a No Clean flux with Conformal coating? Is it
> possible
> to have a match pair in order to omit the cleaning step?
>
> Thanks,
>
> Dr. Gil Zilber
> Technologist, Elta system Ltd.
>
> The information contained in this communication is proprietary to
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