In a message dated 9/23/98 7:24:30 AM Pacific Daylight Time,
[log in to unmask] writes:

<<   Steve,

         Do you use this organic acid flux throughout the whole process?
         Reflow, wave, hand solder, etc?

         We have quite the opposite problem of most of your counterparts
         - we are PLAGUED with Customer directed board suppliers that
         constantly give us bad boards.  Couple that with the parts that
         come from a zillion suppliers, and we have chronic opportunities
         for SOMETHING to come up with solderability problems.  (We are a
         quite large contract manufacturer of PWAs)

         If we could go to a cure-all type flux, maybe I could spend a
         little more time doing PROACTIVE Quality Engineering instead of
         REACTIVE.

         Sigh - pipe dream, I know.

         Jan Pelchat>>

Hi Jan!

Customer directed fab houses huh? Figures....they don't have to deal with the
issues that you do...you just give them good assemblies and they got their
bare fabs for pennies...I feel for ya'!

Yes I do use organic acid through out the process. The only time I use
anything else is on third op stuff that can't go through the wash like
transformers, piezo's, etc., and then I use no clean.

That way I really don't have to worry that much about solderability, and when
something along those lines does pop up (it's been with parts usually), it's
not a questionable call,,,'cause if I'm not soldering with the flux I use,
there's something most definitely wrong.

I do have to keep after people about timely washing of the assemblies, you let
them sit for anymore than an hour or two with the flux on em', it'll take the
shine right out of the joints...

Do you use low activity flux?

-Steve Gregory-

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