Jorge,

Tantelums are a bit more robust for the wave process than ceramic chip
capacitors.  According to documents from Kemet Electronic Corporation,
document F-2105A
"Larger size (1825, 2225) resistor chip and ceramic capacitor chips should
not be wave soldered".

However their document for "Tantelum Chip Capacitors" (named but not
numbered), states; "KEMET's families of surface mount tantelum capacitors
are compatible with wave (single or dual) soldering and IR or vapor phase
reflow techniques".  "Preheating these components is recommended to avoid
extreme thermal stress.  The maximum recommended preheat rate is 2C per
second."
They also give a time/temp graph for maximum recommended parameters.

I would imagine your supplier of tantelums might have similar information,
but I would check it out before I started pushing them through the wave
process.

Steve A

> -----Original Message-----
> From: Jorge Rodriguez [SMTP:[log in to unmask]]
> Sent: Tuesday,October 02,2001 11:29 AM
> To:   [log in to unmask]
> Subject:      [TN] Tantalum Caps
>
> Technetters,
>
> I have a product that has Tantalum Caps, having them waved would make our
> life easier, the board has some TH components we currently hand solder and
> that could be waved. I know that there might be some reason not to wave
> Tantalums, but I am not sure. Can Tantalum Caps be wave soldered?, Has
> anyone done this?
>
> Any responses would be appreciated
>
> Jorge Rodriguez
> Process Engineer
> Varian Inc
>
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