What is the purpose of the plug? What are you trying
to achieve? Does the customer require a flat service
verse a surface with a hole in the middle? What is
the requirement for the surface that the test pin will
come in contact with? Is gold acceptable?
Mike
--- Hans Rohr <[log in to unmask]> wrote:
> One of our customers wants us to plug vias
> (.016-.020") with a
> conductive epoxy material. The board is finished
> with white tin so
> plugging with solder is out. The vias do not have to
> be completely
> filled but the plugs must be strong enough to
> withstand test probe
> pressure. The epoxy filled vias will be used as
> test points. We have
> used carbon and silver epoxy on conductive surfaces
> but never to plug
> holes. Has anyone ever done this and can you
> suggest a conductive epoxy
> that can be screened on?
>
> Hans Rohr
>
>
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