Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

There is a special type of material that is used on PCB's for membrane-switch
contacts. I believe it's carbon, and usually laid out in some "interlocking"
fashion to ensure contact/bridging when the membrane touches it. Seems to be
made directly on the PCB. Anyone know what this is, and how it's made?

No, I don't need any, but would like to know what it is exactly and how it's
done.

I'm sure I have something with it here, and will take a pic when I find it.

Cheers,
-Neil.