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To meet the continued demand for form factor reduction and functional integration of electronic devices, Wafer Level Packaging (WLP) is an attractive packaging solution with many advantages in comparison with standard Ball Grid Array (BGA) packages. The advancement of fan-out WLP has made it a more promising solution as compared with fan-in WLP, because it can offer greater flexibility in enabling...
Three dimensional finite element analysis (FEA) is performed to assess the board level temperature cycling reliability for lead-free solder Sn96.5Ag3Cu0.5 (SAC305) used in eWLB packages. With Anand viscoplastic constitutive model used for the solder material, the chosen damage parameters, i.e. accumulated creep strain or accumulated creep strain energy density, can be derived from the finite element...
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