James,

I have been involved in two different "disasters" in which a conductive
epoxy was used to connect solder coated chip type components.   The
products were intended for or used in office type environments.  Some
failed in the factory and some failed weeks or months after being
fielded.  The failure mode was elevated DC resistance of the interconnection.

I seem to recall some conductive epoxies out there which can be used with
solder terminations, can't recall the specifics.  Otherwise I'd only use
the epoxy for gold plated chip components and use solder for solder coated
terminations.

Good Luck,
Gregg

mailto:[log in to unmask]

At 03:34 PM 1/23/01, Marsico, James wrote:
>Hello, Technet...
>
>Here is an unusual situation.  We have to assemble a surface mount assembly
>using silver epoxy.  Some of the components will be solder coated.  I know,
>don't bother asking... this is the way it has to be.  The good thing is that
>this assembly is a prototype for bench-top laboratory use only.  There is no
>harsh environment and needs to operate 1, maybe 2, years.  The question is
>does anyone foresee any problems?  What happens when one mixes toe two
>technologies?
>
>Thanks,
>Jim Marsico
>EDO Electronic Systems Group
>[log in to unmask] <mailto:[log in to unmask]>

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