Micromechanical Adhesion Experiments and Simulation on Cu-Damascene Processed Test Devices
IEEE Transactions on Device and Materials Reliability(2023)
摘要
A novel experimental setup for testing interface properties of single copper interconnect structures is presented. The method is based on in-situ SEM nanoindentation experiments, utilized to probe customized copper structures manufactured by the Dual Damascene process. In this way the testing structures resemble product-like length-scales and properties. For the investigation of interface properties, the experimental load-displacement data is reviewed. Focused ion beam (FIB) cross sections are performed to validate the delaminated interface. FEM-simulations, based on the measured load-displacement data are used to determine the stress state in the test structures and to derive values for the interface fracture strength of the investigated interface.
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关键词
FEM-simulations,interconnect reliability,interface testing,in-situ micromechanical testing
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