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
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 | Thu Dec 16 09:15:07 EST 2010 | davef
Please post pictures of microsections
Electronics Forum | Thu Dec 16 23:17:02 EST 2010 | Jacki
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.
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 | Fri Apr 25 04:44:56 EDT 2008 | jkhiew
Hi all, I mean after post adhesive oven curing (SMD at bottom side) prior to manual insert of PTH components (top side), what is the recommended storage time prior to wave soldering in order to avoid pin/blow holes and sunken joints issues (pcb asse
Electronics Forum | Mon Nov 07 17:45:37 EST 2022 | emeto
Hello all, Can anyone advise if any standard covers ENIG plated boards shelf life? Or share what you do for bare boards storage and expiration criteria?
Electronics Forum | Thu Nov 10 20:39:44 EST 2022 | SMTA-64386598
The solderability shelf life of ENIG is related almost entirely to diffusion of O2 through the gold plating. When O2 diffuses through the gold, the underlying nickel is oxidized rendering it unsolderable (with ENIG - you solder to Ni, the gold dissol
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