Laser solidification of conductive composites on a fabric surface

Selective laser solidification of conductive composites on rough fabric surfaces for electric circuit boards was carried out. This process has been used for flat, smooth, heat resistant surfaces, such as glass or silicon. However, there are currently numerous applications of printed or fabricated conductive lines for circuit boards on flexible and rough surfaces, and many of them have not been investigated for selective laser solidification. In our study, conductive paste containing nanoparticles that become a conductive layer when solidified was applied to a fabric substrate, and a laser beam was irradiated on the surface to fabricate a conductive line. Conductive lines with low electrical resistance were successfully achieved on the fabric surface. An experimental study and theoretical analysis of solidifying pastes with conductive nanoparticles is presented, and its process characteristics are discussed.