I am looking for guidance on conductive epoxy selection for components on
PCBs. I heard that there is a formulation of conductive epoxy with silicone
as a filler that is more flexible. Do you know of any studies or
evaluations available on conductive epoxy for electronics?

We attached a 4 pin LGA component that has gold finish terminations to
a HSAL finished PCB. We syringe dispensed the conductive epoxy to the land
pattern. Optically machine placed part and allowed the conductive epoxy to
cure over the weekend.
During environmental stress test ( hot / cold cycling) one joint failed.
All of the LGAs were removed and what we found is the component came off
way to easily.

I would like to continue using conductive epoxy to mount special
application SMD's: however reliability is a concern. Any words of wisdom?


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