I've designed some interesting prototypes with conductive paint (bare paint). I'd like to see if I can make them more space efficient via some sort of printed design. However, I would like to keep using ink on paper, ie, actual PCBs are out of the question for this project.
Are there any off the shelf cost effective ways of printing a conductive pattern to paper?
Bonus love if you know if printing is possible with a transparent solution like: http://en.wikipedia.org/wiki/Indium_tin_oxide
Best Answer
Boy, this seems like an HP7475-style plotter hacked to take a pen with conductive ink would be the way to go. These were plotters that moved pens in x and z, while y was handled by a paper-mover. I don't know if there's anything like it out there today. They were pricey in the late '80s.
Poking around a bit, I can find a ref to them being used for PCB
http://www.youtube.com/watch?v=IG9KNDvoRl4