Electronics Forum | Thu Apr 13 21:02:37 EDT 2000 | Mario Carluccio
Can anyone advise me what are the types of contaminants which can be present on a printed circuit board at the very beginning of a SMT line. Of these contaminants, are any of them detrimental to the SMT process (i.e. label application, or solder pas
Electronics Forum | Wed Feb 21 22:08:23 EST 2001 | Dave E
Well, the vendor claims the contaminant caused the component failures. So? The only feasible possibilities would be contaminated solder paste, wash water or coating -- or maybe the problem is due to defective resistors?
Electronics Forum | Fri Feb 23 16:11:51 EST 2001 | Dave E
The sulphur outgassing from these rubber bands was >enough to contaminate every board... Well, if every rubber band is a threat then sulphur contamination must be a common problem. Are sulphur test kits available?
Electronics Forum | Mon Oct 22 09:32:27 EDT 2001 | Steve L
The solder joint appeared dull and there is dewetting on the PCB after Reflow. The leads of IC we used appeared dull grey before soldering. Dose anyone happen to know if there is a standard to verify the IC contamination and how to deal with the con
Electronics Forum | Fri Jul 22 07:36:18 EDT 2005 | Guest
It's the same like asking wether you get a gold-contaminated solder pot when soldering ENIG boards. As long as the replenishment of dross is large compared to the intake of contaminant, the contamination level will stay within acceptable levels.
Electronics Forum | Mon Dec 26 19:18:49 EST 2005 | arnold
I would to ask on what do you call on the color green contamination found on the soldered units. Whe i soldered some units after few days there was a color green on the wires. what do you call on this contamination?
Electronics Forum | Mon Mar 12 08:27:00 EDT 2007 | rgduval
Have you checked the parts for contamination? Are the voids out of spec? IPC allows some voiding, especially with lead free solder. Component contamination can cause this to repeat, as well. Try pre-tinning the component in question, and see if s
Electronics Forum | Tue Oct 12 13:07:49 EDT 2010 | markgray
Baking of the component helps it depends on the type of contamination and how much contamination. It sounds like your purchasing is buying from brokers.
Electronics Forum | Mon Oct 22 16:47:09 EDT 2012 | edmundo
We use a NC Flux in the wave solder and after aAcelerated Life Test cicle we found contamination white residues paths between some solder points. Does somebody know a possible cause for this contamination.
Electronics Forum | Tue Jan 20 10:00:25 EST 2015 | TM
Hello We are currently cleaning stencils from both process (PbSn and lead free) in the same cleaning machine. A customer is concerned about cross contamination of lead between stencils. Is there any test kit or tool that you can suggest to test the
