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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 12 Aug 1998 13:35:48 -0700 |
Content-Type: | text/plain |
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I concur with Jan.
In my previous life, I used a batch cleaner try to clean
water-soluble solderpaste flux from smt boards. Tried 3 or 4
solderpaste mfg's, and all had flux residue remaining under
components and in solder joints after many cycles of
dishwashing. For some cleaning cycles, 5 to 10% saponifier
was used but still same result. Ending up throwing away 5
dozen good boards because of solder joint discoloration.
conclusion:
A batch cleaner is for dishwashing dishes. It's not for
dishwashing smt boards.
Matthew Park
NII-Norsat International Inc.
>>> Jan Satterfield <[log in to unmask]> August 12,
1998 1:07 pm >>>
I've never seen a batch cleaner yet that would remove RMA from
SMT
assemblies. I've worked with both Batch cleaners and in-line
cleaners
and have learned that batch works great with thru-hole
components, but
you really need an in-line cleaner to clean under SMT parts.
Good Luck!
>-----Original Message-----
>From: Devitt, Kenneth [SMTP:[log in to unmask]]
>Sent: Wednesday, August 12, 1998 8:33 AM
>To: [log in to unmask]
>Subject: [TN] Batch cleaning of SMT RMA fluxes
>
>To TechNet,
>
>We are currently running a dishwasher type batch cleaner
>(AqueousTechnologies Model RU400) and Kyzen XJN (30%
concentration) are
>having difficulties removing flux residues from our SMT
assemblies with RMA
>solder paste (ESP 63/37 RMA flux).
>
>Our current parameters are 155 F for wash chemistry for 9
Minutes, 100 F
>water rinse for total of 15 minutes, and 12 min. dry @ 120 F.
>
>We would like to hear from Techneters who are successfully
using batch
>cleaners to remove RMA fluxes in terms of machine mfr.,
chemistry type, wash
>and rinse parameters.
>
>thanks in advance,
>
>Ken Devitt Tom Long
>[log in to unmask] [log in to unmask]
>973-284-3880 973-284-2786
>
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