[sdiy] conductive rubber layer on PCBs??

[harrybissell]

I would try to gold plate the contact area.

Probably someone makes a rub-on pen or something like that...
I'd check "Injectorall" (sp?) or "Kepro" on google for some
ideas...

H^) harry

creekree at gmx.de wrote:
> 
> hi, i re-joined to get answers for this question ;)
> 
> i want to etch a pcb that is designed to be the switchboard for a simple
> keyboard.
> how can i keep the copper tracks from corroding?
> i am talking about those parts that "make the actual switch" , e.g.
> where the black thingie in the rubber cups underneath the keys of my
> scavenged toy keyboard connects two traces...
> (sorry for my bad explanation, i just dont know the correct terms)
> on commercial board these spots are coated with something that i suspect
> to be conductive rubber or something like that....
> 
> in a nutshell: how to do it properly?
> 
> thanks, creekree