Influence of superimposed ultrasound on deformability of Cu

The effects of superimposed ultrasonic vibration on the plastic deformation of 99.99% pure polycrystalline Cu are studied both during (temporary) and after (residual) the application of ultrasound (US) using deformability measurements acquired from an automated wire bonding machine and microhardness testing. It is found that if ultrasonic irradiation is applied during the deformation of the 100 μm diameter Cu free air balls (FABs) the Cu …