Electronics Forum | Mon May 26 11:02:17 EDT 2008 | jandon
Hi Mr. Necdet Ozyonum, Recently we did have same kind of problems when we use lead free reflow profile for leaded solder paste (AIM WS-483). There where solder resist lacks, we found white residue after aqueous cleaning. Not in the solder joints but
Electronics Forum | Tue Jul 02 12:33:32 EDT 2002 | Mike Konrad
We have had success removing white residue. A change of chemical (PCB-Wash or Vigon A200) have a good track record in removing white residue. As Dave stated, we (and others) operate a contract cleaning service. Contact me offline and I�ll provide
Electronics Forum | Fri Apr 03 08:22:36 EST 1998 | Scott Cook
| At this moment in time we are using water soluble solder paste on our PCBs these are cleaned using water only, agitated with ultrasonics. After drying a white/grey residue is left around solder joints. Reflow profile is fine and a reliable wash pro
Electronics Forum | Wed Jan 27 19:42:34 EST 1999 | parag palshikar
i am working with the noclean process and getting white residues on the bottomside of the board probably due to the wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated temperature a
Electronics Forum | Mon Apr 29 10:42:47 EDT 2002 | Jim M.
I had problems with white residues on both WS609 and WS 3060.The WS 3060 turned out to be a carbonized material.The composition after analysis (Energy Dispersive X-ray spectrum) turned out to be tin,tin,phosphore and cloline and tin. Alpha also have
Electronics Forum | Mon May 26 08:59:32 EDT 2008 | davef
It's possible that the flux residues from the solder paste used in your SMT process is not compatible with your water wash process. For instance, some no-clean fluxes leave resudues that are not water washable. When these residues are washed, they de
Electronics Forum | Sun May 25 10:30:31 EDT 2008 | necdetozyonum
Dear All, I would like to take your opinion about the result that we have faced after cleaning the PC assemblies in a cleaning machine (Miele Dishwasher) with the cleaning detergent Qualitek Everkleen 1005. We use DI water for cleaning purpose in t
Electronics Forum | Mon Apr 22 18:09:14 EDT 2002 | pjc
Lots of good info on this subject in the SMTnet forum archives. Please search on your topic.
Electronics Forum | Mon Apr 22 21:10:07 EDT 2002 | davef
Russ: What is the composition of this non-ionic material on your pads?
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