Electronics Forum | Wed Dec 07 15:19:10 EST 2011 | soren
If this is a water soluble flux, then the discoloring is caused by the still active flux microetching the solder fillets. Prevention is to wash off all water soluble flux as soon as possible
Electronics Forum | Fri Jul 20 17:38:06 EDT 2018 | mikedcmt
We have some MLCC capacitors that show some discoloration, or spots. Does anyone know if this will affect reliability? Caps test good - and assemblies function perfectly.
Electronics Forum | Sat Jan 19 11:53:51 EST 2019 | davef
cColor is NOT a measure of solder connection quality. It is a process indicator. So, you're being smart by trying to figure out whats causing he discoloration
Electronics Forum | Tue Feb 23 08:46:11 EST 2021 | dianau
Hello, I have a topic with vias discoloration(that's what supplier said) and I don't know if it's an corrosion problem or something else. I believe that maybe the PCB's are not storage properly. I must mention that aren't any problem at soldering. D
Electronics Forum | Mon Nov 22 12:45:52 EST 2021 | proceng1
You say the resistor is blown. Is the body discolored? Is it possible that these are not the colors, like maybe the first GOLD is actually orange? Perhaps post a photo?
Electronics Forum | Wed Jul 05 17:06:36 EDT 2000 | Michael Parker
Patrick- You have not given enought detail of the type of discoloration. Is it "white residue"? Can it be "rust" colored? Whatever it is, you fab supplier needs to be called in immediately and give you an exact reason for this failure. Just rubbing
Electronics Forum | Tue Aug 21 05:05:52 EDT 2007 | vangogh
Hi All, I would like to get some inputs regarding this.... I have bare PCB which were stored with kapton tape attached on the Au plated pads. These were stored for close to a year. Upon removal of kapton tape, we noticed discolorations on the edges o
Electronics Forum | Sat Aug 30 11:42:49 EDT 2008 | davef
Some immersion silver [IAg] products can go brown with aging. On a newly plated board, we expect you to see Ag, C, & O. The amount will vary according to supplier and thickness. Questions are: * How uniform is the brown coloration of the IAg on the
Electronics Forum | Wed Jun 17 16:02:09 EDT 2009 | mhunter
Any thoughts on this will be appreciated, thanks in advance for reviewing. This assembly has been processed in our facility by going through a press operation (~ 1731 lbs), then into wave solder. Note the discoloration around the pemnut. The discol
Electronics Forum | Fri Feb 21 20:41:32 EST 2003 | Raul
It is a common knowledge that sulphur and immersion silver finish on a PCB do not go together very well. We are seeing peaks of sulphur on some of our assemblies (with silver finish) and as expected we experience severe difficulties with processing t
