Electronics Forum | Fri Sep 15 05:48:11 EDT 2000 | carsonho
Have any experience that Sn/Pb plated integrated circuit products will appear some rainbowbridge-like substance after exposing at conditions of 121degC, 100%RH and 15psi for 48hours or above? The rainbow bridge substance was analyzed by EDAX and fou
Electronics Forum | Tue Jul 27 13:48:45 EDT 2004 | Ralf
Hi Recently i have noticed that after reflow (hot air oven) on the solder lands without components but with solder(screen printing) there is discoloration. It looks like gasolin spilled on the wet road (rainbow). Any idea and reason Ralf
Electronics Forum | Thu Mar 10 13:05:41 EST 2005 | patrickbruneel
This phenomenon is caused by a high amount of halogens (Cl, Br etc.) used in the flux activators or in the flux surfactants. We've seen effects creating all colors of the rainbow. Changing to No-Clean (halide-free) will eliminate this color effect.
Electronics Forum | Tue Dec 14 14:04:07 EST 1999 | John
My memory is so bad, I can't even remember the dirty one..... Try this: If they can remember The first two, black, then brown, all that you need to remember is the colors of the rainbow, in order, then grey. I just visualize it, but there may be so
Electronics Forum | Fri Jan 19 10:43:28 EST 2007 | jimmyjames
You guys are all joking right?! There aren't any contaminates in your solder, the different colors on the surface are completely normal and even expected. The top layer of solder oxidizes and the structure of the surface resembles crystals, refract
Electronics Forum | Fri Sep 21 15:33:59 EDT 2007 | chef
I've been away for a bunch of years, chasing a different rainbow - all I got to say to SAmir is "Want some cheese with that whine?" C'mon- this is supposed to be a peer to peer help forum, if I can remember the original intent. Ragging on rookies do
Electronics Forum | Thu Oct 06 18:58:29 EDT 2005 | PWH
Holders and blades can be spendy. "JNJ" is good place to get aftermarket stuff (I have no affiliation with them). I've also found laser cut metal blades work fairly good and are cheap. Your stencil supplier might be able to cut them for you if you
Electronics Forum | Thu Jan 12 11:45:18 EST 2006 | patrickbruneel
Noah 2005 In the year 2005, the Lord came unto Noah, who was now living in the United States, and said, �Once again, the earth has become wicked and over-populated, and I see the end of all flesh before me. Build another Ark and save 2 of every liv
