Electronics Forum | Tue Aug 01 22:04:11 EDT 2006 | davef
Problems with IPA are: * IPA / material being 'cleaned' combination still needs to be removed from the board. * IPA and empty containers are a hazardous material by RCRA criteria (40CFR 261) * Flash point (~12*C TCC) of IPA is low enough that all ele
Electronics Forum | Wed Sep 02 16:41:44 EDT 2009 | pcbcleaning
Advanced Cleaning Solutions is a Johnstown, PA based electronic manufacturing service provider (EMS) with more than 3,500 square feet of ESD safe facilities. Our services include precision PCB cleaning and ionic cleanliness testing/verification usin
Electronics Forum | Thu Apr 06 15:22:19 EDT 2006 | L. Molinero
In fact the use of gloves will eliminate the transfer of oils and some organic residues to the boards, but then you may have an additional problem, cotton residues (lint) are also a concern specially when handling boards with fine pitch or small size
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 | Thu Sep 19 17:14:02 EDT 2002 | davef
Comments are: * Use an eraser if the surface of Au is not clean, but make sure the eraser has no/low ionics (such as sulfur that is a common additive for rubber). * If the plating surface required eraser to remove the top surface, the plasma normally
Electronics Forum | Thu Sep 20 01:13:05 EDT 2001 | Michael Konrad
Hi Dave, It may be. DI water alone will not build up residue. It can attack the finish of electro-polished (mirrored) stainless steel though. I have seen a white / chalky buildup on poly inline cleaners, usually isolated in the wash section. The
Electronics Forum | Wed Dec 19 11:52:24 EST 2001 | mparker
Have you tried to polish the flex with an ESD camel hair brush? The residual films - are they organic, left over from the water? Maybe try some TSP - tri-sodium phosphate, it's a mildly caustic detergent. A thorough rinse would be needed after using
Electronics Forum | Thu Dec 23 03:13:47 EST 2004 | Steve Stach
The "Rose" test is a process control tool because it is cheap and easy to use. It has it's problems; but, it is generally agreed to be the best tool available for this purpose. All others are much more expensive and time consuming to run every day.
Electronics Forum | Wed Aug 23 10:04:24 EDT 2006 | blnorman
We have seen leakage currents around parts that have high impedance. Evidently with a small amount of moisture, weak organic acids present in the flux residue can cause a low leakage.
Electronics Forum | Thu Oct 01 12:46:57 EDT 2015 | gregoryyork
Would be nice to see your profile, as I would imagine you could be too cool in reflow especially if seeing milky residues in Paste could be Organics that havent volatised out properly
