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July 2006

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Subject:
From:
"Schaefer, Chris" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Schaefer, Chris
Date:
Thu, 27 Jul 2006 08:55:01 -0500
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I agree with Steve. We use Kyzen A4520 @ 13% (125F) on boards processed with no-clean paste and 2% liquid flux. The results are great and since the change of chemistry and a new machine that has a level 4 chem. iso, I never here from the floor concerning white residues. Great huh? Now I can do more productive Engineering projects - one at a time. I have evaluated the A4630 and it works even better at lower temps., but I don't have the time to implement at this point. Kyzen is also working on a soap that would be used to remove water soluble fluxes at very low concentration, but I'm not sure if it is out yet. Note: this is not a sales generation of any sort - we just use their product.

Hope this helps.

CAS

Chris Schaefer
Suntron Corporation
Process Engineer
540 N. Rogers Road
Olathe, Kansas 66062
913.393.5878
[log in to unmask] 

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-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Steve Gregory
Sent: Wednesday, July 26, 2006 3:25 PM
To: [log in to unmask]
Subject: Re: [TN] Water Cleaning No Clean FLux from a PCBA


Hi Michael!

From experience, Kyzen Aquanox XJN works very well on no-clean residues.
Kyzen also has newer formulas such as 4512P and 4520 that works even
better at lower concentrations. Any of the Aquanox family cleans
no-clean residues very well...

-Steve Gregory- 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael Forrester
Sent: Wednesday, July 26, 2006 3:15 PM
To: [log in to unmask]
Subject: [TN] Water Cleaning No Clean FLux from a PCBA

      We have a PCBA assembly that requires very low/none ionic
contamination due to high impedance circuitry.  Normally we use a water
soluble flux solder paste and wash the PCBAs.  Our current vendor only
uses Indium NC-SMQ92 no-clean solder paste.  To met the following spec:

Printed Circuit Assemblies shall meet cleanliness standards as per
IPC-A-610 and IPC/EIA J-STD-001.
Testing shall be in accordance with and meet the requirements of IPC/EIA
J-STD-001 Paragraph 8.3.6 or 8.3.7.

they want to use water and Kyzen XJN+ as a saponifier.  Has anyone used
this method of cleaning  a no clean assembly?  If so what was the
result?  Any other suggestions?
Thank you.

Best Regards,

Michael Forrester
Sr. Manufacturing Engineer
LeCroy Corp

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