for a
PCB with vias/thru holes
try
140 F with 95% RH for 96 hrs.
then
reflow 3 cycles
wave
solder
take a
look at flow up thru holes/vias
some
believe this represents 8 months of shelf life approx.
(from
a Mike Carano IPC workshop) - thanks Mike!
Mike
Weekes
Hello TechNet:
We are searching for a method of
accelerated aging of PCBs with surface finish in white tin (chemical
tin).
This method should be
recognized , in order to simulate the storage of 6 or 12 month under normal
conditions.
(85/85/1d or 2d test
??)
After such an accelerated test,
the solderability will be tested by the wetting balance method.
Thank you for your answer
With best regards
Peter Hefti