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 Nov 30 00:41:23 EST 2017 | abhilash4788
Dear All, I have OSP finsh pcb on my production, the pcb thickness is 1.5mm and the product is one sideded pcba. After reflow process, Is there any specific time frame defined for smt completed OSP finish pcba before going for wave soldering proce
Electronics Forum | Wed Dec 06 09:09:54 EST 2017 | davef
Suppliers have improved the utility and quality of OSP [organic solderability preservative] solderable surface protection over the years. Be cautious reading too much into older SMTnet [and web in general] conversations about handling OSP. When prop
Electronics Forum | Mon Feb 09 09:45:16 EST 2015 | saoasasd
Thanks for the support Jax. Our current scenario: Baking - Not allowed for PCBs Washing - Not allowed Heat Cycles - 2 (Bottom and top side). It's a notebook board Our concern is related to solderability because OSP finishing will be seriously imp
Electronics Forum | Mon Feb 09 08:34:50 EST 2015 | saoasasd
In my case most of the PCBs are OSP finishing and worst case of MSD component on bottom side is level 3 (168 hours). You mean that PCB shelf life with bottom side assembled shoud be 84 hours?
Electronics Forum | Mon Feb 09 10:51:10 EST 2015 | jax
If solderability is the only concern, then there is no standard time. Multiple factors involving OSP thickness, Flux activation levels, profile parameters, storage environment will drive the problem. You just need to perform tests to determine your m
Electronics Forum | Mon Feb 05 07:02:11 EST 2007 | CL
ASIR, Findings for us so far: OSP- has worked well for us for single sided boards only. We have seen problems with using it on double sided reflow applications. Also, some customers have specified OSP, but are intolerant of exposed copper. Limited
Electronics Forum | Mon Feb 09 09:00:17 EST 2015 | jax
Outside the MSD issues stated already (and I cannot provide a exact time not knowing multiple factors like Humidity levels, temps, exposure times, etc...) OSP might be the very worst finish to use in this scenario of side 1 / store on a shelf / side
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