Thermal properties characterization of conductive thin films and surfaces by pulsed lasers

Second, for a specific application of electrical contacts in microelectronics multilayer Au/Ni coatings on bronze substrates were studied. Thermal effusivity values plotted versus time after laser pulse enable estimation of the effusivity variation from the surface coating to the substrate. The effusivity of surface Au/Ni coatings with thickness 0.8/2 μm was estimated to 25 800 W s1/2 m−2 K−1 and with thickness 0.2/2 μm was estimated to 21 400 W s1/2 m−2 K−1.