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May 2002

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Thu, 23 May 2002 21:51:58 EDT
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Hi all!

Just started building an assembly that calls out film capacitors to be used
in 64-locations on the board. Processed the assemblies in a typical manner as
one would for most SMT assemblies, and experienced massive failures of these
caps. They are PPS films. Unfortunately, this has been a first for me...never
had to process these caps before. They are delaminating...the layers of film
are flaking off from the caps.

Can anybody tell me how I should assemble these devils? Went to the web page
of the manufacturer, and they have a recommended reflow profile that is
2-mins, 45-seconds long...to me, that violates the specifactions that Kester
recommends for their paste to perform...

Is using SMT film caps a bad idea? ( I think I know the answer, but I just
want a confirming opinion...)

-Steve Gregory-

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