Electronics Forum | Wed Dec 20 12:49:06 EST 2006 | paul_bmc
I am looking for white papers or information on what happens to 63/37 solder paste alloys when overheated. I have had some solder joint analysis done regarding missing finish on some of the joints. The analysis came back showing a low lead content
Electronics Forum | Wed Dec 20 16:50:26 EST 2006 | stepheniii
I worked for a company that had a nurse come in to talk to us about lead exposure. She assured us we had nothing in facility that would come close to vapourizing lead. Are you sure they didn't touch up using leadfree solder?
Electronics Forum | Wed Dec 20 16:30:40 EST 2006 | CK the Flip
I've seen smaller components have a "charred" appearance and a lack of wetting up the component termination. Also, extended heat exposure may introduce excessive IMC (intermetallic) formation - the bad kind, that is. That's where your IMC layer wil
Electronics Forum | Wed Dec 20 15:40:36 EST 2006 | slthomas
I'm no metallurgist but I don't think you're going to burn up lead with a soldering iron. That said, I would surmise that you could pull a lot of the metallization from the component terminations (very likely lead free) and the pads on the board (i
Electronics Forum | Wed Dec 20 20:34:09 EST 2006 | davef
We're not real clear on the issue. [Got ourselves wrapped around lead (Pb) versus lead (termination), we think.] That aside, comments are: * Boiling point of lead [Pb] is [/K]: 2022 [or 1749 �C (3180 �F)] * It's possible that the material that com
Electronics Forum | Wed Mar 28 14:40:13 EDT 2007 | amelara98
Unfortunately, the facility overseas does not have a profiler. We suspect it is overheating due to a thick pallet and a raised temperature to compensate for it.
Electronics Forum | Thu Dec 10 12:57:25 EST 2009 | scottp
We've used mostly cartridges for many years and I only saw separation once when a particular paste supplier had a problem. With cartridges it's just thaw and use - no mixing. We have some sites that use jars along with mixers and I've never been co
Electronics Forum | Mon Jan 15 13:31:11 EST 2007 | John S.
Since it is in a pallet, I would be sure the preheat temperature is correct across the entire assembly. We've seen large temperatue delta's across assemblies that are soldered in pallets. Could be overheated even or contact time too long. Interest
Electronics Forum | Wed Apr 21 22:15:12 EDT 1999 | Chris
| I'm having problems with trying to get a good solder joint using a Ceramic PCB. We are using AMTECH hi-temp solder (ws-486 96.5/3.5ag). My profile looks great and I used the recommended profile from Amtech with a few adjustments. My max temp is abo
Electronics Forum | Tue Dec 12 17:54:04 EST 2000 | ralph
I've had this problem myself, though in using water soluables. But the process to eliminate it is still the same. There are three possible causes for this to occure. Too much humidity, to much solder, and too much heat. Are you leaving the paste
