http://www.digitalartsonline.co.uk/news/hacking-maker/3d-systems-explores-conductive-inks-for-googles-project-ara-customisable-smartphone/
http://www.digitalartsonline.co.uk/news/hacking-maker/3d-systems-explores-conductive-inks-for-googles-project-ara-customisable-smartphone
“Racetrack” configuration for mass manufacturing sounds interesting.
I’m imagining different print stages with different levels of detail and perhaps even different processes. Fdm with an inkjet skin could be pretty and very fast.