Abstract
A reactive ink for forming conductive structure includes a metal complex ion solution and an alcoholic solvent having at least two hydroxyl groups. A volumetric ratio of the metal complex ion solution to the alcoholic solvent ranges between 9:1 and 1:9. A method of making conductive structure is also disclosed, including the steps of contacting the reactive ink with a surface of a substrate, wherein at least one of the reactive ink and the substrate has light transmission; reducing the metal ion contained in the reactive ink to elemental metal to form a conductive structure on the surface of the substrate by emitting a laser beam to the reactive ink or the substrate; and removing the residual reactive ink from the surface of the substrate.