Abstract
Welding characteristics of thin copper wire using complex vibration ultrasonic wire bonding are studied. The welding systems used have a complex transverse vibration welding tip which is driven by two longitudinal vibration systems crossed at a right angle. Welding tip vibration locus shape is controlled by regulating these vibration systems. Welding specimens used are 0.025 mm diameter copper wire and 1.0 mm thick copper plate. These specimens are welded successfully with smaller vibration amplitude and shorter weld time than a conventional welding system. Weld strength is independent of specimen wire direction.
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