Patent ID: 7776764

Claim:
A method of preparing an ink for printing a semiconductor layer of a thin-film transistor, comprising the steps of: a) preparing a water dispersion comprising a surfactant and a plurality of single walled carbon nanotubes wherein the surfactant is adsorbed on the single walled carbon nanotubes and is ca able of actin as a template for at least one of a plurality of monomers of a polymer dielectric substance; b) adding the plurality of monomers of the polymer dielectric substance to the water dispersion and agitating it; and c) polymerizing the added plurality of monomers such that the single walled carbon nanotubes having the surfactant adsorbed thereon are coated with a thickness of the polymer dielectric substance, wherein the thickness of the polymer dielectric substance coated on the surface of the single walled carbon nanotubes is controlled by the addition amount of the monomer of the polymer dielectric substance added to the water dispersion, wherein said ink is formed.