Laser direct fabrication of silver conductors on glass boards

Laser micro-cladding has been used to fabricate metal conductors, according to a designed electronic circuit, directly onto glass boards which had been coated with a silver-containing electronic paste. The electronic pastes, composed of silver powders, inorganic binders and organic medium, thus formed the conductive metal pattern (i.e. electric circuit) along the path of the laser allowing the rest of the layer to be removed subsequently by an organic solvent. Firing in a furnace at 600 °C resulted in conductive lines with resistivity of about 10−5 Ω cm and with adhesive strength of the order of magnitude of megapascals.