Electronics Forum | Fri Dec 17 03:26:04 EST 2010 | kemasta
Thanks. If based on your statement, I can understand why it still can absorb moisture. But the PCB supplier was suggested us to keep at 40%~70% RH, if any issue occur with the storage condition of less than 5% RH, I think it is difficult for us to ge
Electronics Forum | Thu Dec 16 04:14:16 EST 2010 | kemasta
Hi, I am new in this industrial. I learnt that PCB may absorb moisture and eventually caused delaminate after heat apply on it (reflow or wave). But I don't quite understand, if the PCB was keep in sealed bubble bag, and with the humidity control wit
Electronics Forum | Wed Apr 11 23:47:14 EDT 2001 | zam_bri
Thank you for the feedback guys. The concerns I have is related to components' performance as well as chipped-off & cracks. Does the performance also degrading over the time? thx
Electronics Forum | Fri Apr 13 17:08:57 EDT 2001 | davef
root around the following site http://www.faradnet.com/ ... you should find some good stuff on capacitors
Electronics Forum | Thu Nov 03 09:20:29 EST 2005 | russ
Unforunately, the only one who can give you that answer is the manufacturer. They are the only ones who know what is in their paste and how it reacts to different situations and conditions.
Electronics Forum | Thu Dec 16 19:28:50 EST 2010 | kemasta
I tired to attached the picture, but fail. maybe My company firewall block any document from leak out. Any other way?
Electronics Forum | Fri Dec 17 00:55:22 EST 2010 | kemasta
Hi Kim Dun take any risk in delamination bcoz u > will be the person to answer for being it. So, > we do bake all Pcbs, which have 3months of shelf > life, b4 startin any process although they are > still inside the factory packs. We keep it in
Electronics Forum | Thu Aug 29 17:45:54 EDT 2002 | nifhail
What are other testing/process step that we should do if we where to use the old date code QFPs other than solderability and baking ? What is the plating composition normally %? lead, % tin etc. I have my policy not to accept the more than 12 mont
Electronics Forum | Mon Jan 05 18:03:04 EST 2004 | davef
You may struggle finding the information that you seek, because there is so much variability in the design and fabrication of boards. * What is the purpose of such a test? * What product type sees such an use environment? Consider using the guidelin
Electronics Forum | Fri Dec 17 02:43:24 EST 2010 | grahamcooper22
Ideal storage conditions to stop pcbs absorbing moisture is at less then 5% RH, for example in sealed moisture barrier bags. You mention that storage was at 40~70%...at these levels the pcb will absorb quite a bit of moisture. Your baking time was no
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