Abstract
Because of their high strength and oxidation resistance as well as low cost, Cu micro bonding wires have received increased interests in microelectronic packaging industry. The present work revealed that the coating boundary provided additional strength improvement by blocking dislocation gliding. Furthermore, the greater strain concentration along slip bands introduced larger cracks within the Pd coating layer with coarser grains. The present study provides insights for reliable Pd-coated Cu micro bonding wire processing and bonding applications.
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