Chen, Chun-HaoChun-HaoChenChiang, Meng TingMeng TingChiangTUNG-HAN CHUANG2024-03-012024-03-012023-12-0121563950https://scholars.lib.ntu.edu.tw/handle/123456789/640158Ag-alloy wire is of particular interest in high-power integrated circuits (ICs) due to its superior physical properties, but studies on creep failure in Ag-alloy wire are extremely sparse. This article investigated the creep behavior of the widely used Ag-4Pd bonding wire at tensile stress levels of 20-80 MPa at constant temperature and in the temperature range of 300 °C-400 °C at constant tensile stress. The steady-state creep flow behavior was analyzed through fitting the Arrhenius power-law creep equation, and the rate-dependent process of creep deformation was found to be dislocation climb-controlled. The activation energy of creep in Ag-4Pd bonding wire is 133.86 kJ/mol within this temperature range, suggesting that fast diffusion paths could be involved. Results of the cross-sectional analysis of the brittle fractured wire correlate with the kinetic analysis from a phenomenological point of view, indicating diffusion paths through grain boundaries.Ag-alloy bonding wire | Arrhenius power-law creep | creep | failure analysisjournal article10.1109/TCPMT.2023.33366392-s2.0-85182606996https://api.elsevier.com/content/abstract/scopus_id/85182606996