Electronics Forum | Wed May 03 13:06:54 EDT 2000 | Sal
GUYS SEEING A PROBLEM WITH SOLDER PASTE LEACHING. THE PCB IS HASL FINISH , AND THE DEVICE IN QUESTION IS A O.O30" PITCH RESNET. THE SIZE OF THE PADS ARE 0.020 x 0.0.047 THOU , THE APERTURE SIZES ARE 0.018 x 0.042 THOU . THE LEACHING IS OCCURING DUE
Electronics Forum | Wed May 03 20:19:31 EDT 2000 | Dave F
Sal: Sorry, sometimes (more often than I�d like to admit) I�m a bit dense. But first � Leaching. Dissolution of a metal coating into liquid solder. Leaching applies to liquid solder and is applied inaccurately to metallurgical effects, like diff
Electronics Forum | Fri Apr 25 17:03:34 EDT 2003 | davef
Leaching. Dissolution of a metal coating into liquid solder. Leaching applies to liquid solder and, at times, is applied inaccurately to metallurgical effects, like diffusion, that occur after the solder has solidified. Please help us understand y
Electronics Forum | Fri Apr 09 20:28:14 EDT 2004 | Ken
I have experience in this. My company offers Lead free SMT and Wave soldering. I have processed ImSn, ImAg, Enig, OSP in both smt and wave. Yes, silver leaching will occur. Yes, copper leaching will occur. High tin content solders disolve everyt
Electronics Forum | Tue Jun 29 15:55:26 EDT 1999 | Roberto Cardozo (Brazil)
Could somebody tell me what means Leaching, ie: "Leaching of terminal end face exposing the ceramic"?
Electronics Forum | Wed Jun 30 11:09:24 EDT 1999 | John Thorup
| | | Could somebody tell me what means Leaching, ie: "Leaching of terminal end face exposing the ceramic"? | | | | | Roberto: Leaching, according to the SMTnet Library of Terms: | | | | Leaching. Dissolution of a metal coating into liquid solder.
Electronics Forum | Fri May 02 12:33:47 EDT 2003 | Kris
Hi What is your reflow profile ? Try to limit exposure at parts with visible leaching to around 30 to 40 secs at around 235 to 240 deg T
Electronics Forum | Sat Feb 28 18:09:49 EST 2004 | Indraneel
Hi, I am having some problem during reflow of solder paste. There seems to be leaching of solder paste. Can anyone let me know some solutions to minimize it . Rgds Indraneel
Electronics Forum | Tue Dec 21 13:18:41 EST 2004 | patrickbruneel
Here a link to a study on leaching http://www.pbfree.com/pdf/groundwater_leaching/solder_leachate.pdf
Electronics Forum | Wed Feb 20 16:55:52 EST 2008 | flipit
Pd/Ag doesn't usually dissolve (leach) nearly as bad as Ag only. In my hybrid days, we would use 62/36/2 solder. The 2% silver helps saturate the solder joint and thus keep the Ag from being leached away by the Sn.
