Electronics Forum | Mon May 24 15:45:58 EDT 2004 | mleber
I am interested in how Military / Class 3 manufacturers are handling Gold SMT components. We are receiving an increasing number of tape and reel components that are gold plated. Per J-STD we need to tin all gold components. Are parts being removed fr
Electronics Forum | Mon Sep 27 22:25:05 EDT 2004 | KEN
Minimal cost and low melting point??? Have you bought Indium or Bismuth based alloys lately? Tin/Silver, Tin silver coper-X you name it....there are trade-offs (cost / performance). Not all are exactly published or are suitable for all appliations
Electronics Forum | Thu May 18 21:05:58 EDT 2006 | Wizard of Oz Tin Man
"Solder alloy compositions are numerous but the most important are still the tin lead solders which were used by the Romans. Tin melts at around 232�C and lead at about 327�C in the combination 62Sn 38Pb the resulting alloy melts at 183�C. This compo
Electronics Forum | Tue Sep 14 10:10:39 EDT 2010 | teamcanada
We are having an issue with a PCB supplier. Their Tin HASL layer seems to be the problem. We have triedworking with them to correct their process. What seems to have helped is lowering their temperature of the Tin dip from 540 F to 510 F.We still ha
Electronics Forum | Fri Mar 18 14:22:37 EDT 2011 | bradbriggs
We recently ran into a situation where a SMT header with tin plated tails would not wet properly during reflow. Someone told us that tin plating has a shelf life and needs to be re-tinned after a length of time. I have not heard of that before. Do
Electronics Forum | Fri Jan 18 14:24:07 EST 2013 | davef
Here's the story: * Solder will melt and alloy with the solder alloy that you have in the pot. * Flux will smoke, smell and leave schmutz floating on the surface of the solder in the pot. While the amount of smoke, smell and schmutz are variables, b
Electronics Forum | Fri May 18 15:07:56 EDT 2007 | jbecircuits
Thank you for all your help. I help all my customers to understand more about the production of their parts. I even build free parts using 3-4 different finishes so they can evaluate the parts. In working with CM's many of them are always asking us t
Electronics Forum | Sat May 09 23:05:17 EDT 2009 | kareal
Davef, It seems the tin resist residue on copper trace is root cause of whitish layer. but it could explian why I could not detect tin on fresh unit without UHAST. I have performed X-section and EDS analysis on many fresh units,but no any tin was
Electronics Forum | Thu Sep 11 11:34:52 EDT 2008 | patrickbruneel
Interesting observation Manuel. I will be blamed again for crying wolf but look below a lot more defects will soon see the daylight all related to lead-free. This information was posted at the tin whisker forum by Bob Landman of H&L Instruments.
Electronics Forum | Mon Oct 03 10:41:57 EDT 2011 | patrickbruneel
Some of us here attended the 5th CALCE international symposium on tin whiskers http://www.calce.umd.edu/symposiums/ISTW2011.htm where one of my former professors, Dr. Henning Leidecker, talked about the tin whiskers he and the others at NASA Godda
