Whether in wind turbines or e-vehicles - heavy-wire bonds are an indispensable part of power electronics. Weak points in these wire bonds are currently breaks in the transition area from the bond point in the wire bridge and a lifting of the bonds from the surface. Shear tests with their various shear codes currently help to evaluate the quality of the connection. With the help of shear tests and the use of simulation tools, an objective quality evaluation of heavy wire bonds for different, novel wire materials will be made.

Therefore, the aim of the project is to describe the shear test on heavy wire bond points (wedges) used in the quality evaluation of bond wire joints by damage mechanics models and to correlate them with real tests. These tests and models are intended to scientifically interpret and make understandable both the increasing damage development and the hardening that occurs in the process. In this way, conclusions are to be drawn about the material- and process-specific influences of novel wire materials on the development of so-called shear codes, in order to contribute to the objective evaluation of bond quality.