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 | Wed Jan 13 15:47:57 EST 2016 | dyoungquist
What surface finish are you using on the bare PCBs? ENIG, Silver, OSP, Leadfree HASL, etc.?
Electronics Forum | Wed Nov 21 16:56:46 EST 2007 | pms
Thanks folks, Yes, we do not have enough info yet to make decisions at this point. Just trying to get a feel what folks would do in this case. Enig,Black-Pad-Nickle skips....Always concerned about ENIG. Silver finish? Is this better? DaveF, Thank
Electronics Forum | Mon Jun 10 22:14:49 EDT 2002 | davef
While they're '50 pitch', you need to think of 0402 as fine pitch parts. So, ENIG, imm silver, and imm tin finishes and probably OSP would be good choices. Stay away from HASL.
Electronics Forum | Sun Jun 29 15:03:04 EDT 2008 | jensteele
I was referring to the HASL supplied by the supplier...specifically Lead Free HASL. I've been searching the web and I cannot find a thickness specification like we have for ENIG and Immersion Silver.
Electronics Forum | Thu Jul 08 23:46:21 EDT 2010 | rdoss
I have this same problems on the flex i use, most of which has an ENIG or immersion silver finish. About the only thing I know to do is have your supplier package it in a vaccume seeled bag to keep it from oxidizing. Otherwise you end up having to
Electronics Forum | Wed Apr 02 15:55:04 EDT 2008 | boardhouse
See if you can find someone with an XRF machine or talk to your Current Board house they probably have this equiptment if they run ENIG or Silver finishes. I would stop in with some boards your having issues with and have them measure the thickness.
Electronics Forum | Wed Jan 12 17:24:16 EST 2011 | piter
HI Ok solder past seems to be ok, but what type do you have finihing of PCB(ENIG, immersion silver, SN100??), second what type of solder alloy do you have on BGA, its important, I don't think that you have problem with stencil. answer on my questio
Electronics Forum | Tue Apr 28 04:06:25 EDT 2015 | anirudh_thabjul
thankyou for your answer. I came to know that "ENIG/ENEPIG is much costlier than Immersion Silver and Immersion Tin. So, my company doesn't allow me to use ENIG/ENEPIG". So, i will suggust my company to use Immersion silver or Immersion tin. Rega
Electronics Forum | Wed Jan 31 02:56:53 EST 2018 | robl
Hi Fluxgate, Doubt it's the laminate unless you have embedded components. Nickel is ferromagnetic (can be magnetised),so I would expect some level of magnetism in ENIG, but not silver. Are you 100% sure it was immersion silver and not something
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