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Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 2 Jun 1998 00:49:54 -0600 |
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Steven,
We had the same problem a couple of years ago where part
markings were coming off of glass bodied parts. It happened
during saponified aqueous, and the only way we stopped it
100% was to buy different parts. It all depends on your
application and circumstances though, but you may want to
pursue that option as opposed to investing in hand cleaning,
or other expensive options.
We also use RMA flux exclusively, and with some changes in
our cleaning parameters (reduced pressure and temperature on
our in-line aqueous) we reduced it a lot, still cleaned our
boards adequately (ionic clean test) but never really
stopped the problem. Even hand cleaning will remove
markings and is much harder to control.
Hope this helps!
Steve McBride
[log in to unmask]
______________________________ Reply Separator _________________________________
Subject: [TN] How to Clean RMA Flux?
Author: PC:[log in to unmask] at INTERNET
Date: 6/1/98 1:26 PM
I'm looking for pointers to information on how to clean RMA flux from
circuit boards. We're doing contract assembly and the design currently
specifies RMA flux. (Build specs are basically WS-6536 and Mil-Std-2000,
NOT 2000A or J-Std) We've got an in-line aqueous system (using Armakleen
detergents) in place, but it's removing markings from diodes (and the
markings are required to be readable). We've also been using a solvent
vapor system (AK-225), but it's attacking the adhesive bonding heatsinks
to the boards.
Anybody care to make suggestions for RMA flux cleaning approaches or
pointers to likely candidates for a)information or b)product
representatives?
Thanks
Steven Axdal
General Dynamics Information Systems
[log in to unmask] 612-853-3830
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