Daan,

The only "rule" currently being used by many component manufacturers is
"There are no rules!!".

Find several more vendors. Test their products.
Then continuously test samples as delivered.
This is becoming a way of life for many OEMs and CMs!


David A. Douthit
Manager
LoCan LLC

"d. terstegge" wrote:

> Hi Technet,
>
> I'm having some problems with a tantalum capacitor that outgasses
> during reflow soldering. The result is that components placed next to
> this tantalum are just blown off their pads, plus 25% of the caps
> themselves fail at testing.
> After waiting several months for the vendor's reaction we finally
> received a note mentioning that excessively humid storage conditions may
> lead to problems, and in such cases baking of the parts is recommended.
> Although I don't think we have excessive conditions here (R.H. normally
> between 30 and 70%, occasionally up to 75 %) the vendor tries to make us
> believe that we should put these parts and all similar tantalum caps in
> our separate dry storage room (that we only use for parts that have a
> JEDEC MSD level of 2 or higher).
>
> My questions:  Should our internal handling procedures be based on
> "vague" information that we get after a quality complaint, or may I
> expect that our component supplier conforms to JEDEC standards for
> packing and labelling of moitsure sensitive parts ?  Do you see it more
> often, that component manufacturers (and this is a large one !!!) seem
> completely unaware of the IPC/JEDEC specs for MSD's ?
>
> Best regards,
>
> Daan Terstegge
> Thales Communications
> Unclassified mail
> Personal Website: http://www.smtinfo.net
>
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