If I am not wrong , Rashmi is looking for information about Shelf Life of PCBA and not about PCB. So no need for further soldering operations later on in the years...)
Unfortunately there are not IPC standards taking kare about it. It may be you can find suggestions in some MIL Stds... or some OEM's Guidelines
Normally all is done by harmonizing the best practices for storage of electronic stuff and by experience feed back .
By not having batteries or large Cap on PCBA it is a very good point that facilitate the storage for long period ( for instance, by not having DC bias no risks for CAF growing or ECM etc).
By experience, put PCBA in a ESD S bag, if necessary sealed not only folded. Environment conditions the lower Temperature it is possible to get, and for sure the lowest RH% you can get.
With 20°C and 45-50% RH after 6 years, everything have been running as new PCBA.
What is above written , is just experience
Regards
Gabriele
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Gumpert, Ben
Inviato: mercoledì 25 gennaio 2017 19:51
A: [log in to unmask]
Oggetto: Re: [TN] TechNet Digest - 21 Jan 2017 to 23 Jan 2017 (#2017-12)
Rashmi,
IPC documents talk to solderability of piece parts and printed boards, but leave the user and supplier to agree upon expected shelf life requirements (and test conditions). Sounds like you want something to apply to assemblies which will have further soldering performed at a later point. This will likely depend on condition of the boards and surface to be soldered, surface finish, packaging, storage conditions, etc. and you might be able to glean some information from J-STD-002 and J-STD-003.
Ben
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mahant, Rashmi
Sent: Tuesday, January 24, 2017 2:24 AM
To: [log in to unmask]
Subject: EXTERNAL: Re: [TN] TechNet Digest - 21 Jan 2017 to 23 Jan 2017 (#2017-12)
Hello,
We are developing our handling documents, for that I need some information.
We get the PCBs assembled from the EMS supplier, but we are not having any guidelines on shelf life of the same.
Can you help me with the guideline for shelf life of Printed circuit board assemblies. (we are not using any battery /super cap in our assembly) Is there any IPS standard stating the same?
Thanks for your support in advance.
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