Is reflow taking them out or cleaning? I have used a lot of SMT film caps
without problems but they don't like cleaning. DI water ok, IPA ok, very hot
saponified water or other solvents bad.
Haven't see them just come apart during reflow.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of [log in to unmask]
> Sent: Thursday, May 23, 2002 9:52 PM
> To: [log in to unmask]
> Subject: [TN] Film Capacitors...geeze!
>
>
> 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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