Hi Technetters,

        Does anyone have experience with cocuring conductive and nonconductive
epoxies?  We're looking at a process of dispensing nonconductive epoxy
to secure the middle of a cap, then dispensing conductive epoxy for the
terminations, placing the component, and then doing only one cure?  The
two epoxies will most likely come into contact with each during the
dispense or cure step.

        We're trying to accomplish two things; additional strength of the
attachment and a dam for the conductive epoxy.  For risks, we see a
potential for the nonconductive epoxy developing a barrier between the
cap and the substrate.  There's also an issue with thermal expansion
that I need to do the math on.  But, this should be pretty straight
forward.

        Any stories out there?  Success or failure?

Thanks in advance for any input.

Glenn Pelkey
Quality/Reliability Engineer
Maxtek Components Corp.
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