Electronics Forum | Mon Jul 10 09:25:47 EDT 2006 | nodlac
Here is a nugget from the Data Sheet... Wave Soldering: Excess moisture on the PCB during soldering may lead to random solder balling and poor wetting of some solder joints. IT IS IMPORTANT that the flux solvent carrier (water) is fully evaporated a
Electronics Forum | Thu Dec 21 13:33:46 EST 2006 | ppcbs
The problem with super glue is that is has a cyanide base that turns into a toxic gas and evaporates when heated. See IPC-7095. Via's should be fully plugged with solder mask at the fab house. If your PCB designers are not up to speed on IPC requi
Electronics Forum | Mon Feb 26 19:05:32 EST 2007 | KEN
Is there a typical DI cleaner (washer) bath/ spray temperature? (In-line cleaner) Is there a maximum temperature? I know some parts do tend to have issues like TH electrolytic jackets shrinking. But is there any situations to be aware of? Bacteri
Electronics Forum | Tue Sep 08 07:07:55 EDT 2009 | davef
We think the idea is to avoid boiling-off the moisture and let it 'cook-off' at a lower temperature to decrease the potential damage to components. If you heat a pan of water on the stove below, but close to the boiling point of water, the water in t
Electronics Forum | Thu Aug 27 11:35:07 EDT 2009 | davef
There are many possibilities: * Conformal coat is incompatible with surface residue on the board * Conformal coat is incompatible with solder mask on the board * Moisture is out-gassing from the board * Conformal coat is too thick and does not allow
Electronics Forum | Wed Sep 01 06:18:05 EDT 2010 | grahamcooper22
Dear SMT Manufacturer, As moisture is eliminated as the cause then solder paste volume will probably be the main contributing factor. More paste means more chance of solder balls and more flux fumes that need to be evaporated to reduce voiding. Even
Electronics Forum | Mon Mar 21 15:44:12 EDT 2011 | ldavis
Kevin, Not sure about Florida but in Colorado we just transfer the wash solution to a drum and then dispose of it as haz.waste because of the lead. Currently costs about $200/55 gallon drum and we change the solution monthly. Another option would
Electronics Forum | Wed May 23 11:57:00 EDT 2012 | patrickbruneel
Since you have an alcohol based flux one more thing you can try to eliminate flux encapsulation under the connector. Is flux a board and remove when fluxed. Let the board sit for an hour to assure all solvents are evaporated and place the board in th
Electronics Forum | Fri May 13 10:13:24 EDT 2016 | esoderberg
Have used a Pressure Products N29 stencil cleaner for many years with outstanding results. The fluid is Zestron Vigon SC200. Tank holds 14 gallons that lasts for 1 year providing that you change the filters every month and makeup the fluid evaporatio
Electronics Forum | Wed Aug 09 11:59:19 EDT 2017 | dleeper
As you already know, it depends on the paste. There isn't really a rule of thumb, but less time exposed it better. The issue is the flux exposure to the air and ambient conditions. The flux can evaporate or absorb moisture from the air. If the paste
