During the last couple of years several ink manufacturers have presented metal nano-particle inks for inkjet printing. These inks provide low resistances on plastic and paper substrates, thus enabling manufacturing of high-conductivity conductors that could be used in circuit boards.Inkjet printing of a commercial silver nano-particle ink on paper and plastic substrates has been investigated. The focus has been on making narrow lines and low resistance structures by varying substrate type, substrate temperature during printing and ink drop size.It has been found that the metal nano-particle inkjet inks are suitable for making conductors. Also the inkjet technology itself is ready to produce fine details required in circuit board manufacturing.
Liisa Hakola, "Improving quality of inkjet printed metal nano-particle conductors" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP22), 2006, pp 99 - 102, https://doi.org/10.2352/ISSN.2169-4451.2006.22.1.art00025_1