Electronics Forum | Wed Aug 06 16:35:31 EDT 2003 | Carol
This is an old topic, but keeps coming up. Solderability and reliability issues with SMT gold plated terminations when used with tin/lead solder paste/hassle finish PWB. I need to know which standard (mil, IPC, J-STD??) tells you all about the probl
Electronics Forum | Wed Jun 16 15:07:00 EDT 2004 | jsmith01
I ran some test samples with a water soluble past (Amatech ws488). I also tried hand soldering using an Alpha ws375 wave soldering flux and some old fashioned RMA. The results are pretty much the same. Some of the joints look a better that others b
Electronics Forum | Fri May 03 19:02:41 EDT 2002 | davef
Several of the points you make are reinforced in the fine SMTnet Archives. Consider searching them for bedtime reading, until the responses start flowing.
Electronics Forum | Thu May 09 15:56:33 EDT 2002 | stownsend
We are using NC. Paste doesn't seem to have an effect on the solderability on a bad batch of ENIG. When ENIG has gone bad, throw the board out.
Electronics Forum | Thu May 09 17:14:45 EDT 2002 | davef
We are changing our ENIG boards to imm silver. Look here http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=5114&mc=5
Electronics Forum | Fri May 10 17:45:08 EDT 2002 | davef
Kinda makes ya wonder why ya changed, eh? Some of our 20 pitch HASL boards come-out just as flat as a farm pond. Just got ta letum be. Pete is spot on!!
Electronics Forum | Tue Jun 15 08:22:39 EDT 2004 | jsmith01
The parts are dated Mar 20 2004. My profile hits a peek of around 232-240c and is above 225 for around 30 seconds.
Electronics Forum | Tue Jun 15 11:08:02 EDT 2004 | russ
Well take away the easy answers! How are the parts falling off? Is the joint breaking the termination on the part or is it breaking at the solder to termination interface? Also, how long are these parts in liquidous state? and what type of paste a
Electronics Forum | Wed Jun 16 20:36:42 EDT 2004 | russ
Well I am clueless! I have a lead free build coming up and I am going to check to see if our parts do the same thing. I will let you know. Russ
Electronics Forum | Fri May 10 01:41:04 EDT 2002 | ianchan
Steve, Hi mate, was doing some text book reading and saw this one paragraph that commented on the PCB fab plating could have residue chemistry inherent in the PCB if the fab process control isn't up to mark. such chemistry could surface to the Au/N
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