SINTERING METHOD OF PRINTED CIRCUIT BY LASER WRITING

摘要

PURPOSE: A printed circuit sintering method is provided to prevent the damage of a substrate by irradiating laser to a conductivity ink circuit which is printed on the substrate. CONSTITUTION: A conductivity ink circuit(20) is printed on a substrate by using a conductivity ink which has a metal nanoparticle. The optical absorption rate of the conductivity ink circuit is greater than the optical absorption rate of a substrate. Laser(30) is condensed according to a predetermined size with a condensing lens or a cylinder lens. Laser is irradiated to the conductive ink circuit which is printed on the substrate. A conductivity circuit pattern(40) is sintered on a substrate by applying laser heat to the conductivity ink circuit.