Electronics Forum | Tue Feb 15 21:27:18 EST 2005 | davef
Component shelf life depends on: * Solderability protection type. * Quality of process and materials used in applying solderability protection. * Duration of time from when the solderability protection was applied. * Packaging used in component stor
Electronics Forum | Thu Apr 14 06:00:01 EDT 2005 | bryan
The shelf life of immersion silver is 6 to 12 months in good storage conditions. The finish is usually coated with a protective layer that inhibits oxidation (like with copper OSP). Care must be taken when handling the boards as the protective la
Electronics Forum | Fri Jul 15 16:50:04 EDT 2005 | davef
Few of us here on SMTnet fabricate our bare boards. Most of us are assemblers. So, the solderability of the connections of our boards is a BIG issue with us. Our suppliers protect the solderability of the copper by coating the copper to limit the
Electronics Forum | Thu May 07 08:11:58 EDT 2009 | davef
We don't have a good answer for you, but we do have several thoughts on the issue: * First, tin in your solder or solderability protection is going to diffuse into the copper trace or pad on the board naturally. You can stop that by using a protectiv
Electronics Forum | Thu Aug 30 14:47:08 EDT 2012 | rway
We have plenty of people with longer hair. This has never been an issue and there is no evidence it ever has been. Like I said, as long as your facility is following proper ESD protection protocol, which it appears you are, why the fuss? As long a
Electronics Forum | Thu Dec 05 17:59:14 EST 2013 | hegemon
By hand, we apply a precision die cut plastic protective film to a particular "lens" product. It is of the "peel the backing off and apply" style product. Due to the ESD event possibilities, this application is done in an area far away from any ele
Electronics Forum | Tue Oct 31 22:28:03 EST 2000 | Dave F
F: Try ... http://www.ipresearch.com/rrt.html
Electronics Forum | Wed May 07 09:24:33 EDT 2003 | davef
Kris The majority of our tombstoning in very small passive SMT is caused by imperfections in end-cap solderability protection plating.
Electronics Forum | Wed Jul 02 19:20:43 EDT 2003 | teamcanada
Have you looked into Kapton tape as a protectant?
Electronics Forum | Wed Dec 24 16:05:14 EST 2003 | pdeuel
Kapton tape is heat resistant to tempratures accociated with wave solder process. If your process is not no clean then masking compound will work.
