Electronics Forum | Mon Jan 08 17:32:47 EST 2007 | Board House
Hi Oswald, Shelf life with ENIG if vacuum sealed and kept in controled enviroment would be 12 to 14 months. Shelf life in shrink wrap - No recomended packaging, 6 moths. If Shelf life goes over the 12 -14 months - Baking ? I would not suggest re-b
Electronics Forum | Fri Jan 06 00:03:10 EST 2023 | SMTA-64419298
Hello Evtimov, sorry...just saw post as I was looking through list...a bit late. I don't know if you ever got your answer. IPC-4552A covers EniG finishes and suggested shelf life. I've referred to these doc's quite a bit. Good spec's ! Yes, I beli
Electronics Forum | Mon Jul 22 17:29:03 EDT 2013 | jorge_quijano
I have Ag & ENIG finishes, for Ag I've seen some oxidation, specially if the bag is not sealed propperly. Is there any real due date for PCBs?
Electronics Forum | Wed Jun 25 11:53:01 EDT 2003 | gmurray
Does anyone have a listing of recommended usage requirements on SMT components. Can you use SMT resistors which are over 3 years old for example ? Can you use ICs which are not known to be moisture sensitive but which are over 5 years old.
Electronics Forum | Wed Jun 25 12:13:31 EDT 2003 | russ
A lot of it depends upon what the lead terminations are and the storage conditions. For example if they are tin you will run into trouble. We have used all types of parts that are all ages (We just started doing BGAs that are 5 years old.) I don't
Electronics Forum | Wed May 03 09:01:32 EDT 2017 | pavel_murtishev
Good day, Are there any IPC standards applying requirements to HASL PCB shelf life? Are there any exact figures such as one year for instance? Could you point me to standard numbers if they exist. Iny input would be appreciated. Regards, Pavel
Electronics Forum | Wed May 03 16:37:10 EDT 2017 | charliedci
I don't believe there should be any issues with the HASL finish. The issue is how long on the shelf and is a bake out required to remove moisture from PCB, as in any FR4 PCB's that may have had time to absorb moisture.
Electronics Forum | Mon May 15 12:36:12 EDT 2017 | edhare
I don't believe there should be any issues with > the HASL finish. The issue is how long on the > shelf and is a bake out required to remove > moisture from PCB, as in any FR4 PCB's that may > have had time to absorb moisture. > I don't believe
Electronics Forum | Mon Jul 22 15:02:31 EDT 2013 | dyoungquist
What is the pad surface finish on these boards? I know OSP and silver finishes have a shorter shelf life than HASL or gold. We do not use OSP or silver on our boards so I don't know what to look for visually on the pads when they have exceeded the
Electronics Forum | Tue Mar 25 03:18:31 EST 2003 | O' Connor
Thank you for your feedback, I've also looked at the archives on this issue & found useful information there as well.
