Charlie
Welcome back.
I'm sure several responses may help you but, before you short-circuit
all evaluation, please remember the two basic facts:
1. Water-soluble chemistry gives you the widest operating window
2. "No-clean" chemistry gives you a narrow operating window.
This means that it is really impossible to just switch, as there are so
many parameters to consider, e.g. solderability of boards and
components, desired reliability of end product etc., etc., etc. Another
point that it is important to realise: the term "no-clean" covers a
multitude of sins and the easiest "no-clean" fluxes/pastes to use are
those which are the most active and may leave the most active residues,
causing future problems.
I would therefore counsel caution in interpreting the responses to your
enquiry. Caveat emptor.
Brian
Charles Barker wrote:
>
> Hello Technetters;
>
> As Steve Gregory let slip last week, I am back on the job. I'm somewhat
> inundated with catching up, so I had not checked back in on TechNet right away.
>
> MANY THANKS for all the prayers and good wishes. They were felt and very much
> appreciated by both my wife and me. I still have a good bit or soreness from the
> trauma of the surgery, but in general, I feel very good.
>
> Now back to the work/no clean thing:
>
> I am asking a BIGGG favor!
>
> I need to take a serious look at switching our process from a water soluble flux
> soldering operation to a no clean one. Normally, I would put several cored wire
> solders, liquid fluxes and solder pastes through a rigorous evaluation process.
> That could be considered re-inventing the wheel, since many of you have probably
> already done that.
>
> If any of you have done this and could share the results (OFF-LINE, of course),
> I would be greatly obliged.
>
> I would like to know which brands, which model numbers, which alloys and under
> what conditions they were tested, as well, of course, as the results.
>
> THANKS A BUNCH!!!
>
> Charlie B.
> [log in to unmask]
>
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--
Brian Ellis
Protonique SA
PO Box 78
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Voice: +41 21-648 23 34 Fax: +41 21-648 24 11
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