In ultrasonic wire bonding the required vibrations are generated by an ultrasonic transducer driven in its longitudinal mode. Asymmetries lead to additional orthogonal motions, which result in unwanted fluctuating normal forces in the friction contact. In this publication, a novel design of an ultrasonic transducer with control actuators is presented. The parasitic vibrations are damped in an active control and by the semi-active piezoelectric shunt damping with inductance-resistance networks. A Finite-Element model is developed to optimize the dimensions and the placement of the piezoceramics and to tune the electrical networks. Measurements are conducted on a prototype transducer which validate the simulation results.

Date Published: 27 March 2012
PDF: 8 pages
Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 83412L (27 March 2012); doi: 10.1117/12.914789

Published in SPIE Proceedings Vol. 8341:
Active and Passive Smart Structures and Integrated Systems 2012
Henry A. Sodano, Editor(s)