I need to interface some switches to a motherboard, and the keyboard
interface seems easy and cheap ($9), so my plan is to rip up this kbd,
steal the electronics and wire it up to my switches, but I need to
solder onto these connectors/pads...
    http://www.narwani.org/neil/stuff/kbd-interface.jpg

Anyone know what this solid black (carbon-like) material is? It contacts
the metal traces on the transparency when assembled, but I'm not sure I
can solder to it, and wanted to ask before destroy it.

(Other plan would be run the switches to a PIC which would emulate
the std AT keyboard signals, but I'd like to avoid the extra coding
for this one-off).

Cheers,
-Neil.

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