Electronics Forum | Mon Jan 08 03:16:12 EST 2007 | oswald5087
hi' i need advise on immersion gold PCb shelf life. 1) what is the issue shelf life or expire for Immersion gold PCB? 2) How long we can keep the PCB? (with vacuum seal and without vacuum seal) 2) iF PCB expire, can we bake the immersion PCB? what t
Electronics Forum | Sun Aug 03 08:27:41 EDT 2008 | davef
IPC-4553, Specification for Immersion Silver Plating for Printed Circuit Boards, 1.4.1 Solderability. This primary function of IAg is to provide a solderable surface finish, suitable for all surface mount and through-hole assembly applications and wi
Electronics Forum | Fri Sep 12 08:01:55 EDT 2008 | davef
There is no standard. On the web, you can find shelf life estimates for various types of solderability protection on bare boards. These estimates won't translate directly to the storage of assembled boards, because assembled boards [and the solderabi
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 | Sun Feb 20 20:52:26 EST 2011 | Jacki
I agreed not to ask the shelf life extension to the maker of solder paste. However, somtimes we have no chioce except using expired or used paste. When I have to, try the first PCB as a test. If Ok, just carry on other boards. Unless, use a new solde
Electronics Forum | Mon Feb 09 06:56:39 EST 2015 | saoasasd
What is the maximum PCB shelf life for double side PCBs after first reflow? I mean, after assembly bottom side, how long can I keep the PCB without solder paste waiting for the second reflow? (Considering exposure on production environment conditions
Electronics Forum | Tue Dec 12 19:57:56 EST 2017 | myke03o
Hi Experts. We have an expired OSP pcb and we wanted to extend the shelp life. Is it possible to rework the PCB by removing the OSP coating, micro etching and re-applying OSP finish. Any advice if this can be done? Any solution for this OSP pcb e
Electronics Forum | Thu Nov 10 12:29:57 EST 2022 | stephendo
The G in ENIG is gold. It does not oxidise. Either you are thinking of OSP or your board shop is providing defective boards if your boards show oxidation. It would be the nickel that is oxidising but should be totally covered by the gold. Is there
Electronics Forum | Tue Aug 03 13:03:20 EDT 1999 | Dave F
| | I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone know of
Electronics Forum | Tue Aug 03 13:03:48 EDT 1999 | Dave F
| | I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone know of
