Electronics Forum | Wed Oct 11 10:29:28 EDT 2000 | G. English
Try the following steps : FIRST CHECK THE ARCHIVE for further information, it WILL help you. Step One : What�s the chemical analysis of this white res? Obtain a sample. It could be tin, rosin, or something else??? Step Two : The fastest way I know
Electronics Forum | Mon Aug 30 16:07:06 EDT 2004 | Shean Dalton
Hi Chen, Based on your posted message, the following ideas are for your consideration: "brown residue" The water soluble solder paste you are using could be a water soluble rosin solder paste formulation. Perhaps the solder paste may not be proper
Electronics Forum | Thu Aug 20 11:24:22 EDT 2009 | ghepo
Hello Armando, this is what I found into the handbook "Failure Analysis of Electronic processes" : "...Flux residues with water-soluble flux activators that are conductive and corrosive if left on in large enough quantities are detrimental. If you
Electronics Forum | Thu Jan 20 08:19:47 EST 2005 | davef
esoderberg: So, why do you want to clean your no-clean flux residues?
Electronics Forum | Tue Mar 06 13:59:39 EST 2001 | dason_c
I have experience to the Kester 2331 water soluble flux long time ago with white residue and it related to the solder masking. Check what kind of the solder mask and ask Kester to do the test for you. Rgds.
Electronics Forum | Mon Dec 18 23:24:50 EST 2006 | grantp
Hi, Yes, I would hate to resort to cleaning, but the product must be clean. We have been using palettes to keep most of the flux off the PCB, but there is still residue around the connectors. Does anyone suggest a good no clean flux to use with le
Electronics Forum | Thu Jan 20 09:49:08 EST 2005 | Mike Konrad
Regarding the reference (Patrick) to a previous thread promoting �no-residue� fluxes, I must say that there is absolutely no such thing as �No-Residue� flux. There are �Low-Residue� fluxes and even �Very-Low� residue fluxes but to suggest that there
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 | Mon Jul 01 00:09:47 EDT 2002 | Ben
Hi all How can I clean the white residue between QFP 0.5 mil Pitch? The white residue was created from mistake adding liquild No-clean flux Lonco 23F for reworking clean board. I can clean almost of it by using EC7M cleaning solvent except between
Electronics Forum | Sun Apr 05 18:59:15 EDT 1998 | Graham Naisbitt
Jaqueline There are so many variables in the electronic assembly manufacturing process involving more than 12 different chemistries, that it is impossible to easily identify and determine the nature and reason of such residues. GEC Hirst Research in
