Abstract: A functional ink (200) suitable for use as a dielectric layer (303) in a printed semiconductor device (300) comprises a dielectric carrier (201) and a plurality of dielectric particles (202) sized less than about 1,000 nanometers that are disposed within the dielectric carrier. In a preferred approach the dielectric carrier comprises a dielectric resin and the dielectric particles comprise a ferroelectric material (such as, but not limited to, BaTiO3. So provided, this functional ink can be applied to a substrate (301) of choice through a printing technique of choice to thereby provide a resultant printed semiconductor device, such as a field effect transistor, having a relatively thin dielectric layer comprised of this functional ink.