Dear techies ;

apart from obvious I have today two problems ; if you could help please :

1)

We have this batteries (standard buttons) with the legs spot welded on ,
which we handsolder ( with all of the pitfalls ) onto our main boards ;
after the batteries happily age in store ; etc. .

My argument is to reflow a socket on ( found a couple of good ones ) and pop
in the button in assembly of complete unit .
Easy so far .
Now : how do I validate that the connection will stay on ( some 5mV drain )
for 3-5 years ? ; class 2 product ( http://www.resmed.com )
The contact is Nickel on Nickel ( I think ; or is the batteries case Chromed
? ) ; is there any Steam Accelerated Test for contacts validity in the IPC
arsenal ;
or MIL ; the faster the better ?

Werner ? ; or whoever went through this ?

2)

This second one is cute ; we have this molded p/carbon windows over LCD's ;
and they do they charge up ! ; wounding QC in the process as they pick up
every minute spec of dust on the > inside< of the machines (and no, it's not
the red bulldust from Australia's hinterland ; the plant is scrubbed daily )
;
therefore subsequently causing reopening (stressing of screw ports) ;
cleaning ; etc. .

Is there any plastic fellow pointing me to something like permanent surface
polarizing (UV light is doing something ?) ;
( no degrading antistat coatings as they'd wear of outside )
thus making the p/carbon less prone to such a charge build up (up to 5kV) .
Ionizing will not help : the unit goes to a poly bag before box , and picks
up the charge from there .
The cost of antistat bag of that size (500 x 300mm) is astronomical .

Thanks a lot folks

Paul Klasek
http://www.resmed.com

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