My experience with suppliers was just like yours. They were terribly
sloppy with both ESDS and MSD marking. We identified the component
sensitivity issues on our component drawings. Wrong marks are worse than
no marks. Sounds like things have not changed for the better in the last
couple of years . . . Why would they? On this same subject I just got a
message wondering about bags for MSD/ESDS control. Seems that bags which
comply with J-STD-033A are not the norm.

You get the MIL-PRF-81075 physical characteristics or the Water vapor
transmission rate (WVTR)< 0.002 gm/100 in2 ASTM F1249 performance but
not both. I was only able to find one source that satisfies both
performance requirements. What gives?!

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Jim Jenkins
> Sent: Wednesday, September 18, 2002 2:03 PM
> To: [log in to unmask]
> Subject: [TN] Moisture sensitive parts
>
>
> Hi everybody,
>
> Lately we have had a few problems with moisture sensitive
> part precautions.  During the design phase, a part is
> identified as moisture sensitive.  The purchase orders are
> then modified to include packaging/labeling notices
> identifying the moisture requirements.  Then, when the parts
> are received, some are properly packaged and labeled and some
> are not. In all cases when we contact the supplier we are
> told that the part in question is no longer sensitive
> [component assembly processes were changed, etc] or we have
> parts come identified as sensitive which were not when we
> created the design. So the $1000 QUESTION is, do you try to
> identify moisture sensitive parts on your design
> documentation or do you rely on your supplier to properly
> identify and package sensitive parts and just handle them
> accordingly when you receive them???
>
> We have had a number of discrepancies, and I was wondering
> what everyone else does to avoid this kind of thing.  As
> always, thank you in advance for any help you can provide.
>
> Have fun,
>
> Jim Jenkins

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