Abstract: A method of forming a desired conductive trace layout on a substrate, comprising the steps of: printing an organometallic compound onto the substrate in the desired conductive trace layout using a printer, the organometallic compound substantially transparent to electromagnetic radiation which is at least in part absorbed by the substrate; heating the substrate near or at an interface area of the organometallic compound and the substrate using the electromagnetic radiation; and, depositing at least part of the conductive trace on the substrate near or at the heated interface area as a result of the heating step.