Laser Droplet Brazing for Electrical Contacting of Composite Materials with Integrated Active Elements

To be used as actuators or sensors, piezoceramic components have to be electronically contacted. A temperature stable connection can be achieved with brazing techniques. Since piezoceramics are susceptible to damage by high temperatures and temperature gradients, it is important to control the energy input in the brazing process. Therefore, we use a laser droplet brazing method which allows for precise contacting of piezoceramics and avoids thermal damage. The influence of the laser parameters on the brazing process and the contacting accuracy is presented in this paper.