I'm looking for a conductive carbon coating that I can apply to PCBs=20
myself, for conductive membrane switches.  Or something else that can=20
serve the same purpose.  The last time I researched this a few years=20
ago, I ended up going with gold plating, which worked great, but now I=20
need to do just 10 pads, and $100 from my current PCB manufacturer is=20
quite pricey.  I really don't want to swap PCB houses at this time either.

I've seen people experimenting with carbon mixed in inks, etc but those=20
seems experimentative and unproven.  However, I found some products that=20
seem to be what I need -- MG Chemicals 838-340G (=20
http://www.amazon.com/MG-Chemicals-Conductive-Coating-Aerosol/dp/B008OA931A=
=20
) seems like the right product, but I'm not sure how long it would=20
last.  Henkel lists some (=20
http://www.henkel-adhesives.com/conductive-inks-coatings-27433.htm ),=20
but their products aren't readily available retail AFAIK. Similar for=20
Coates XZ302 coatings.

Anyone here used the MG Chemicals one?  Or know of another product that=20
would serve this purpose?  Spray or brush-on is fine.

Cheers,
-Neil.

--=20
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