Electronics Forum | Tue Dec 13 17:27:23 EST 2011 | davef
Here is a link to an interesting Ron Lasky blog posting on the topic http://blogs.indium.com/blog/an-interview-with-the-professor/has-the-time-come-for-tin-bismuth-solders We have no relationship, nor receive benefit from the company referenced abo
Electronics Forum | Tue Nov 06 22:37:35 EST 2012 | davef
Ryan ... "As for bismuth-based lead-free alloys, a lower melting temperature than that of tin-lead is offered together with a cost similar to that of tin [in the area of $3/lb]. Unfortunately, bismuth in soldering alloys tends to create embrittlemen
Electronics Forum | Wed Nov 20 09:27:28 EST 2002 | davef
There's a fair number of issues with lead and bismuth solder alloys: * Lead and bismuth alloys can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. Melting point of the eutectic alloy is 95�C [~96�C?]. * Fillet lifting of PTH du
Electronics Forum | Mon Dec 12 21:38:05 EST 2005 | davef
Effect of lead on bismuth solders * Lead from hot air leveling (HAL) coatings can diffuse through the grain boundaries of the alloy. * Lead can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. * Melting point of this eutectic all
Electronics Forum | Thu Jan 15 10:33:05 EST 2009 | rrpowers
One thing you must be very careful with when using Bismuth is that there is no lead anywhere else within the process, either components or boards. Lead-terminated components or hot air solder leveled (HASL) finished boards used in combination with a
Electronics Forum | Tue Jun 06 14:34:22 EDT 2000 | Charles Harper
Please refer to prior answer recommending contact with Dr. Jennie Hwang.
Electronics Forum | Fri Jul 08 09:40:28 EDT 2005 | Jason Fullerton
"The only real problem we're seeing is some suppliers trying to use bismuth. That's a big no-no in a SnPb process and we won't accept those parts." Yes and no. Since the SnPbBi tertiary alloy melts at 96 degC, any product rated for storage above tha
Electronics Forum | Tue Aug 15 12:15:27 EDT 2006 | russ
Was there not concern about Bismuth for some reason? Cannot remember what it was but it seemed to do with reliability or something? Russ
Electronics Forum | Wed May 07 07:56:51 EDT 2008 | ck_the_flip
We go RoHS. I learned in a seminar that one can ingest Bismuth and not die.
Electronics Forum | Wed Dec 14 12:27:01 EST 2011 | svijais
Hi Dave, Thanks for sharing
