Electronics Forum | Tue Apr 29 09:43:30 EDT 2003 | davef
With a nickel barrier and 'tin' plating, reconsider your reflow recipe to reduce the leaching of the termination into the solder during reflow. Points are: * In designing a reflow temperature recipe, it is important that the temperature be raised at
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 Aug 13 16:54:20 EDT 2004 | davef
If the terminations on your components are not barrier plated, you must be very careful about the amount of time you stay above liquidous. As you'd expect, longer is not better. The longer you stay at liquidous, the more of the component terminatio
Electronics Forum | Mon May 14 13:33:36 EDT 2007 | jax
Solderability!!! The CM in question has probably seen too many solder problems with White Tin in the past. We have had the same issues. To save us from spending too much time and money(verifying pure Tin plating thickness, Chemical leaching from th
Electronics Forum | Thu Mar 25 02:22:32 EST 1999 | P.L. Sorenson - Technical Consultant
| | | Your problem may be related to silver migration (leaching) into the solder. I had what seems to be a similar problem. The solution was using solder with 2% silver content. See these pages for a bit more information: | | | | http://www.ferr
Electronics Forum | Tue Aug 30 09:24:08 EDT 2005 | Slaine
we manufacture a range of ceramic parts that have silver termination,there is already a small leaching problem (absorption of the termination by the solder in liquid form)with Sn62 that we live with, having to implement unleaded solder they are norma
Electronics Forum | Sun Mar 10 21:10:52 EST 2002 | alex_kirichenko
What is "leaching" ? > What is "Halo effect" ?
Electronics Forum | Tue Jun 04 16:14:25 EDT 2002 | Bob
Did I say leaching I meant bleeding. Doh!!
Electronics Forum | Wed Apr 07 09:23:20 EDT 2004 | davef
In addition to your concerns about leaching, why aren't you concerned about: * Tin whiskers * Total absence of in use reliability information about no-lead, especially given that creep is significantly different between SnPb and no-leads. While they
Electronics Forum | Wed Aug 27 09:45:22 EDT 2003 | caldon
My initial thought (Quick and not to in depth)made me think of the solder joint integrity. I would fear solder contamination if the metal making up the plating would leach (or its elements) into the solder joint. I strongly suggest if you were to go
