Electronics Forum | Tue Apr 14 17:39:34 EDT 2009 | gregoryyork
Sorry been away for a while. It is actually due to high boiling solvents or plasticizers leaching from the porous resist that kills the cure as it puddles out and has nothing to adhere to. We do have some wipes to check the cure and are looking to ma
Electronics Forum | Tue Nov 03 18:09:17 EST 2009 | gregoryyork
I think most have summed up the first pictures also is the drillng looking like it is misregistered as well. Better to do a solvent test to determine resist cure not the old stuff the newer chemicals show under cure problem much better. Try your st
Electronics Forum | Mon Jan 11 09:15:36 EST 2010 | lynn_norman
In a former job we had issues with leakage currents on a QFP. The component was acting as a thermal shield leaving a lot of flux residue behind. To make it worse, the flux solvent wasn't totally evaporated, so we had ionic residue, a fluid media, a
Electronics Forum | Wed Sep 01 17:34:18 EDT 2010 | kevm
Having solder flow issues on gold pads. Issues started when supplier switched adhesive tape used to cover pads during varnish process. By running SEM/EDX and XPS analysis it has been determined that the new tape leaves behind a thicker organic residu
Electronics Forum | Wed Feb 19 06:16:53 EST 2014 | cunningham
Yeh due to the solvents in the coatings im guessing there is a health and safety risk. Solvent stripping is a lengthy process for the coatings we use and usually means submerging the whole board so not local to the rework. We have a booth with ioni
Electronics Forum | Fri Feb 10 11:35:44 EST 2017 | rgduval
150º de-ionized water, however, if you're doing hobby work at home, regular hot water will be fine. Just be sure to allow the water to dry sufficiently before powering up the board. You can also use IPA or a custom flux cleaning solvent available o
Electronics Forum | Wed Feb 28 20:10:08 EST 2001 | mhunter
Checked the archives with no luck. Anyone have a reliable test method of verifying acrylic conformal coat cure. Using Humiseal 1B31 mixed with approximately 30% solvent, spraying with a Nordson. Thanks in advance.
Electronics Forum | Wed Feb 28 20:16:26 EST 2001 | mhunter
Checked the archives with no luck. Anyone have a reliable test method of verifying acrylic conformal coat cure. Using Humiseal 1B31 mixed with approximately 30% solvent, spraying with a Nordson. Thanks in advance.
Electronics Forum | Thu Mar 29 16:35:57 EST 2001 | DMZog
To all following this string, there is at least one other chemistry which has passed the South Coast Air Quality Management District testing and has Clean Air Solvent CERTIFICATION! Call Zestron for details 703-589-1198. Dave
Electronics Forum | Thu Aug 24 13:09:30 EDT 2000 | Dr. Ning-Cheng Lee
Yes, a flux with a fast wetting rate will be more prone to have spattering. Fluxes with high boiling point solvents are also more prone to have spattering, if the same flux is fast in wetting rate.