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 | 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.
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 | Tue Sep 02 14:59:41 EDT 2008 | hermes
if two boards with different solder masks give different results on flux residue level after soldering with the exact same machine settings than it is clear that one of the solder masks is not compatible with your no-clean flux. could be the solder m
Electronics Forum | Wed Aug 27 15:49:43 EDT 2008 | grics
I think WML ought to have some photos on how to do this...
Electronics Forum | Wed Aug 27 22:54:44 EDT 2008 | omid_juve
what is WML ? can you please explain more
Electronics Forum | Thu Aug 28 16:21:23 EDT 2008 | realchunks
Larry, I'm seeing a pattern here of you and fire!?!?! What gives?
Electronics Forum | Thu Aug 28 09:30:20 EDT 2008 | patrickbruneel
Omid, No-clean fluxes need to be used right out of the can without thinning. In the past with RA and RMA fluxes you could adjust or thin them to your desired density because they had plenty of solids up to 30%. No-Clean fluxes have a lot lower solid
Electronics Forum | Wed Aug 27 14:58:21 EDT 2008 | omid_juve
we have problem in setting the density of a no clean flux for using before wave soldering . first we dilute the flux but we have many short circuit problem between the pads of edge connector,then we densify the flux all the short circuit is removed b
.gif)
winsouce.jpg)