Electronics Forum | Fri Apr 13 05:07:57 EDT 2001 | zam_bri
Hi Dave, Thanx for your reply. What is it in the process of manufacturing the capacitor that can go wrong until it can caused the chips to be chipped-off or cracks. I've encountered alot of this problem lately. First I thought it was our process t
Electronics Forum | Fri Apr 13 10:47:28 EDT 2001 | davef
I'll respond directly to your question about capacitor fabrication in a later posting, but more importantly and possibly more directly in response to the situation many hands touch your capacitors before you do. Each of these stockroom personnel, UP
Electronics Forum | Wed Apr 11 06:56:20 EDT 2001 | brownsj
Most of the component vendors I've dealt with will guarantee the solderability of the terminations for three years if the components are still packaged in a full reel. If the reel is part used we've kept them for 1 year and then used a wetting balanc
Electronics Forum | Wed Apr 11 06:56:46 EDT 2001 | brownsj
Most of the component vendors I've dealt with will guarantee the solderability of the terminations for three years if the components are still packaged in a full reel. If the reel is part used we've kept them for 1 year and then used a wetting balanc
Electronics Forum | Thu Aug 29 18:28:19 EDT 2002 | Dreamsniper
Semi conductor devices last for 5-10 years or more when in use. Since those parts are in stock and are not in use they are considered in good condition. The only concern that you got is how will you process them. We had the same problem before and it
Electronics Forum | Thu Nov 17 21:52:27 EST 2022 | stephendo
You might be able to create a process that involves testing a sample before each run. But then you would need something showing that a given batch would be consistent enough to justify testing a pcb to prove the batch. Or if they accept SPC then you
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.
