Electronics Forum | Tue Feb 11 12:02:52 EST 2014 | javierec
Process: Batch Cleaner, @16% concentration. Concentration is checked daily. Cleaning after Wave Process. See attached pictures and comment and what you think causes the solder joint to turn grey. i have read post that say the grey dull looking sol
Electronics Forum | Wed Mar 12 09:33:55 EDT 2014 | neiderman
The grey solder joint appearance in the picture looks to be due to chemistry etching the joints. This can be a common problem with alkaline chemistries running at high concentrations and or alkaline chemistries running in batch machines that require
Electronics Forum | Tue Feb 11 14:05:11 EST 2014 | dontfeedphils
I can't speak too much as to why your joints are appearing dull, even with the booster. I can recommend a new chemistry that Kyzen has out that I've been running for about a year now. Price is about the same, it can be run at low(er) concentrations
Electronics Forum | Wed Apr 28 12:08:02 EDT 2010 | tjg
Our latest designs are flip chip on flex based and we have issues with delamination/blistering. We know it is related to our vapor solvent (n-Propyl Bromide based) attacking an inner layer adhesive. Has anyone else ever heard of something like this?
Electronics Forum | Wed Apr 28 14:52:03 EDT 2010 | davef
When we hear the words 'flexible circuit' and 'delamination' in the same sentence, we think: * Excessive reflow temperature. * Entrapped moisture. Boardhouse: I hope this is a step towards redemption.
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 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 | Fri Jul 23 09:14:28 EDT 2004 | davef
Consider your flux suppliers recommendations when determining the proper cleaning method for your boards.
Electronics Forum | Wed Jul 21 17:49:52 EDT 2004 | jsk
problem: Too many solvents and boards are not clean Flux remains on the board after vapor degreaser and "Powdery" white residue after vapor degreasing Flux type is kester 186 Process: hand solder High Temp alloy, spot clean after hand solder e
Electronics Forum | Mon Jul 26 16:31:02 EDT 2004 | Sue PH
We use Kester 186 flux and the STU people would sometimes find white residue after cleaning with Isopropyl at the solder station. We have Lenium (Petroferm)in our vapor degreasers, and now they use Lenium at their stations as well as final clean, an
winsouce.jpg)
