Electronics Forum | Tue Feb 08 15:05:22 EST 2005 | Keith Lengling
I have several memory devices that have 2% bismuth in the lead coating. Is this enough bismuth to be concerned over the formation of a low temperature SnPbBi alloy? What are the allowable limits for bismuth in an SnPb process for both SMT and through
Electronics Forum | Tue Feb 08 22:04:34 EST 2005 | davef
Tough to say. Can you accept the loss of strength of your solder connection if upto 2% of the solder is affected? * Lead and bismuth alloys can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. * Melting point of the eutectic all
Electronics Forum | Mon Dec 12 14:04:33 EST 2005 | craigj
Hi All was wondering is there anything I should be aware of or look out for if using parts with SnBi (Pb free) lead plating with Sn/Pb/Ag solder paste? I was always lead to believe that mixng lead and bismuth caused problems or are the bismuth levels
Electronics Forum | Wed Feb 07 16:20:46 EST 2007 | davef
Bismuth is a low-melting metal with poor mechanical properties; if you melt the bismuth wire into a standard tin-lead solder joint, then the bismuth alloys with the solder, and forms a material that will crumble if you scrape it with your fingernail.
Electronics Forum | Thu Aug 24 15:35:55 EDT 2000 | jkervin
Hi Dr. Lee, Besides the requirement of a PB free surface finish on PCBs, could you tell me what the pros and cons of a Bismuth bearing solder are? Thanks, Jon Kervin
Electronics Forum | Thu Mar 04 02:17:11 EST 1999 | Teemu M�kiniemi
Hello! Does anyone know any PWB bitmuth finish suppliers? How thick layers are usually used? What pros and cons bismuth plating has in PWB applications? Teemu
Electronics Forum | Fri Mar 24 13:05:08 EST 2006 | samir
Patrick, I learned at a Lead-Free seminar, where the seminar lecturer was a proponent of Bismuth in soldering, that Bismuth is actually "safe to eat" and is one of the few non-toxic metals around.
Electronics Forum | Thu May 25 23:26:23 EDT 2006 | adihsr
anyone who knows if really BISMUTH is not good as a replacmeent plating for lead free?...pls.. advise..have a good day...
Electronics Forum | Tue Jan 06 18:06:05 EST 2009 | aj
Hi all, I am currently trialling a solder paste which contains Bismuth. It is leadfree and reflows at 138 degrees C. I would appreciate any pros/cons? aj...
Electronics Forum | Sat Dec 10 05:39:32 EST 2011 | svijais
Dear Friends, I would like to know whether any of you evaluating with Low Temperature Solder especially Tin-Bismuth-Silver COmbination. If you have any feedback/articles/evaluation/reliability/Yield Reports, please share. Regards Vijai
