Continuous wave laser-induced forward transfer of conductive Ag nanoparticle inks

Abstract

The laser induced forward transfer of silver nanoparticle ink using continuous wave laser is studied in this work. The feasibility of this method for printing well-defined lines is proven. Line formation is studied in the laser intensity - scan speed parameter space, showing satisfactory results for a range of energies and speeds. The conductivity of the lines was measured to be comparable to those obtained with inkjet printing, proving the effectiveness of this technique to produce functional electrical interconnects. High speed photography of the transfer process is performed, revealing the markedly different transfer dynamics compared to the traditional, pulsed laser LIFT process.