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 | Thu Jan 20 11:20:28 EST 2000 | Brian W.
It sounds like what you are seeing is leaching of the end cap. You need to check the manufacturer's spec. Many components have terminal barriers, which get a solder plating. Sometimes this plating process is not done well, and the solder plating le
Electronics Forum | Wed Mar 24 09:04:46 EST 1999 | Dave F
| 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.ferroemd.com/
Electronics Forum | Sat Apr 26 01:27:33 EDT 2003 | Iman
no S**t, I was going into SMTnet to post a question, on : 1) what is the actual "physics" behind "Leaching" defect? what is the accurate desciption to define this defect? how to eliminate the general causes to this defect? If encounter, what work pr
Electronics Forum | Wed Apr 07 08:28:41 EDT 2004 | Dougie
Hi, We are Scottish manufacturing company considering a move to Immersion Silver finished PWB's from HASL. The driver behind it being the RoHS and WEEE legislation in Europe at present. My question is... We plan on using a Sn/Cu/Ni solder bar in o
Electronics Forum | Wed Apr 07 08:30:22 EDT 2004 | Dougie
Hi, We are Scottish manufacturing company considering a move to Immersion Silver finished PWB's from HASL. The driver behind it being the RoHS and WEEE legislation in Europe at present. My question is... We plan on using a Sn/Cu/Ni solder bar in o
Electronics Forum | Thu Dec 16 16:28:51 EST 2004 | Indy
Hi, We are using Sn/3.0Ag/0.5Cu solder paste on Pd/Ag pad metallization in one of our application. Could someone provide me information on the following: 1. How bad is the Leaching of Ag in SAC alloy and how it can be mitigated. 2. During reflow so
Electronics Forum | Thu Jun 08 07:56:34 EDT 2017 | jkitt84
In an excellent previous thread davef mentions brass should be plated prior to soldering to prevent zinc leaching from the brass. It is reported once the zinc leaches, the joint is weak. He recommends copper or nickel plating. Would silver plating w
Electronics Forum | Thu May 04 17:14:11 EDT 2000 | Boca
Solder 'follows' heat, sounds like the fab is heating up faster than the component. Or the components are solderability 'chanllenged' and the paste turns liquid, and would rather spead out on the land than wet to the component termination. Are thes
Electronics Forum | Thu Aug 16 19:58:49 EDT 2001 | davef
Just feel relieved that we didn't go to the matt on the use of "leaching" rather than "dissolution". And you thought this was easy, eh?
