Electronics Forum | Mon Nov 01 11:43:45 EDT 2010 | patrickbruneel
Jacki, Lead-free Cu based alloys with melting point below 210C don’t exist.
Electronics Forum | Mon Oct 26 15:38:27 EDT 2009 | davef
We believe that some suppliers replace nickel with cobalt in SN100 to product a shinier, less grainy, more attractive lead-free solder connection. SN100E sales-types like the idea that it is available in paste, bar stock, and other forms; as compare
Electronics Forum | Wed Sep 29 19:47:44 EDT 2021 | emeto
"For the lead free soldering of electronic assemblies, the inclusion of silver in the alloy results in better wetting compared to non-silver containing alloys and also allows for a broader process window. Silver also improves joint reliab
Electronics Forum | Thu Jan 03 08:32:28 EST 2002 | davef
You're correct. There's a range of issues. Two perspectives are: * TI and other suppliers has been shipping lead-free solderability protected leads on components for years. We have discussed, here on SMTnet, a need to adjust the reflow profile to
Electronics Forum | Wed Aug 10 10:41:23 EDT 2005 | patrickbruneel
Bob, Great theory if you're selling SN100C, but I have to disagree that an alloy being 4�C off eutectic will cause cracks. When a solder joint exits the solder wave, there is an immediate drop in temperature of 100�C. so being off 4�C is irrelevant.
Electronics Forum | Wed Oct 12 11:19:46 EDT 2005 | patrickbruneel
Yeah, adopting is the right word. In this new lead-free era spec.'s are made to stay within the scoop of the RoHS directive. The driving force for spec.'s should be reliability. Did you see any impurity level spec.'s yet in wave soldering for Cu, Au,
Electronics Forum | Tue Aug 11 19:46:34 EDT 2009 | padawanlinuxero
Guys I have a question since the ever present problem with the crack switch we had to change to a low temp lead free solder paste in these case eutectic 58Bi/42Sn and 57Bi/42Sn/1Ag alloys, now the main question whats diferent between these one and th
Electronics Forum | Tue Jan 31 12:13:26 EST 2006 | Calvin Kolokoy
Today's regular Sn-Pb paste chemistries are designed to run at higher peak temperatures ensuring that your lead-free alloys will coalesce with your regular Sn-Pb solder. That being said, it is do-able to solder both types in one oven. Generally, wit
Electronics Forum | Thu Aug 19 09:58:14 EDT 1999 | John Thorup
| | | we've received an inquiry if lead free solder for solder dips or surface mounting (cream solder) is available on a technical scale | Dr. Weber I'm not sure what you mean by "on a technical scale" but various no lead alloys are available in
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
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