Electronics Forum | Wed Aug 10 07:55:21 EDT 2005 | ajaydoshi
we are using heareous F381, F352 no clean solder paste. specially in qfp for high frequency board we observe that cleaing / removing of ' no clean flux 'is require. if we do not clean same most of time after all test & envioumental test it shows pin
Electronics Forum | Wed Sep 05 14:53:45 EDT 2001 | Jeff Meier
We have customers that are requiring no flux residue left on boards after soldering of non-water washable parts. We currently use Multicore Crystal 502 No-Clean to solder parts that are not washable. Has anyone come up with a good way to remove this
Electronics Forum | Wed Aug 10 08:10:39 EDT 2005 | davef
Comments are: * Sounds like it's necessary to clean "heareous F381, F352 no clean solder paste" in your application. Consider a paste that may be better suited to your application. * If you're cleaning "low residue flux", consider using an organic ac
Electronics Forum | Thu Sep 06 10:55:37 EDT 2001 | davef
saturation occurs at ppm levels. Remember, IPA is extremely flammable and its bulk use makes the plant liable to all sorts of quite repressive safety rules/regulations and so on. Ignoring these rules exposes the owner to fines and possible plant cl
Electronics Forum | Wed Aug 10 17:19:24 EDT 2005 | Steve Stach
The propensity for flux residues to cause shorts can be increased in humid environments where water molecules hydrate the surfaces. At high frequencies, electrons travel on the surface of conductors/insulators, increasing the likelihood of shorts in
Electronics Forum | Thu Sep 06 10:34:21 EDT 2001 | Mike Konrad
Hi Jeff, Sean is correct. Although ultrasonic technology will work in post-reflow de-fluxing applications, you will receive concerns regarding ultrasonic �damage� to wire bonded components. Much has been written to combat this belief but the conce
Electronics Forum | Thu Sep 06 09:49:26 EDT 2001 | ksfacinelli
This is a real problem. We have experimented with a number of off the shelf products as well as discussed the issue with a few solder manufacturers. As you are aware IPA or Flux off can make the product look worse. I would discuss with the custome
Electronics Forum | Thu Sep 06 10:58:54 EDT 2001 | Steve
If I had to deal with this problem, I would switch to water soluble paste. It is a much more cost effective solution.
Electronics Forum | Fri Sep 07 21:43:40 EDT 2001 | mugen
Hi, We use IPA and Prozone, if IPA is so drastically detrimental, to the pcba's.....what suggested alternative, can you please recommend, as IPA replacement? Thanks.
Electronics Forum | Wed Aug 10 08:53:45 EDT 2005 | jh0n!
Wasn't aware of that. We're using a no-clean with RF pcbs, and that's something to bear in mind for the future - thanks.
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