Prints using #nanoparticle-based conductive ink. Can create multilayer #pcb routing!
Looks interesting. There was a company in the 80’s that did this with epoxy and #40 gauge wire. What wasn’t really clear was what sort of signal integrity you can get over the silver paste but assuming you can get 20 - 30Mhz on it then it should be useful for a number of interesting projects.
I deal more with high current switch mode power/regulation. Not sure if the ink could handle several amps on it without being as wide as a postage stamp.