One for discussion I think.
There appears to be limited options when it comes to the control of moisture
sensitive devices through the assembly process, the options being a
paperwork based system or the use of RF tracking software. We have some
ideas here based on the use of indicator strips which change colour when
exposed to moisture. If these were developed to be time sensitive with the
use of an absorbent film of some kind then they could be used to monitor
floor life on batches of components - trays or reels.
For instance, a level 3 strip would change colour (from green to red would
be nice !) after 7 days at a certain humidity. This would have to be based
on J-STD-033. Sounds feasible but I can not seem to trace anyone who is
selling such an item. Does anyone have any experience of this technique
being used ? If not, any comments would be appreciated. Perhaps a good
buisness idea for someone considering the potential market !

Thanks

Bryan Kerr
Principal Quality Engineer
Process and Materials Laboratory
AMS Hillend
Scotland

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