Patent ID: 8053540

Claim:
A method of preparing transparent electromagnetic interference shielding material, comprising: preparing a catalyst precursor composition comprising: (a) a reactive oligomer which has acrylate or methacrylate as a functional group, and a molecular weight ranging from 500 to 5000; (b) a reactive monomer which has acrylate or methacrylate as a functional group, and a molecular weight ranging from 100 to 600; (c) α-hydroxyketone as a photoinitiator; (d) a catalyst precursor for electroless plating which is an organic compound or an inorganic compound including a group VIII B metal or a group I B metal; and (e) a solvent selected from the group consisting of chloroform, acetonitrile, methylethylketone, ethylacetate, and mixtures thereof; printing a lattice pattern on a transparent base material with the prepared catalyst precursor composition; heating the base material to evaporate the solvent from the catalyst precursor composition; curing the base material by irradiation of a UV (ultraviolet) ray to reduce the metal ion of the catalyst precursor to a catalyst metal which can function as a catalyst for electroless plating; and immersing the cured base material in an electroless plating solution to perform electroless plating on the surface of the base material.