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- W2046720565 abstract "The fabrication of embedded passives represents a promising solution for system in package (SiP) regarding the reduction of size and assembly costs. But the thermo-mechanical deformation caused by residual stress generated from embedded passives processing have a significant impact on reliability of embedded passives. Due to the complication of embedded passives processing, there are several challenges in simulating the process of embedded passives, such as time-variation structures and boundary conditions. In this study, the finite element model of embedded capacitor is developed and employed to simulate the process of embedded passives with the application of element birth and death technology. The results represent that the maximum displacement take place at the outermost substrate after the process. In addition, the stress concentration is also found in the micro-vias. And then the stress field of process simulation is the initial stress field of the subsequent finite element analysis, the reliability of embedded capacitor is studied by coupling residual stress with accelerated thermal cycling. Comparative analysis of simulation result and experimental result, the results show that the micro-via in the lateral substrate has been obvious deformed, which will result in signal integrity problems and other reliability problems. In addition, the stress concentration is also found in the micro-vias. In the subsequent uncoupling analysis, an assumption made for the finite element analysis is that there is not residual stress in the embedded substrate. The result shows that that the maximum deformation did not take place at the micro-via of substrate, which is not accord with practice and results of coupling analysis. So in the study of process and thermo-mechanical reliability, residual stress of embedded process must be considered." @default.
- W2046720565 created "2016-06-24" @default.
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- W2046720565 date "2010-08-01" @default.
- W2046720565 modified "2023-09-23" @default.
- W2046720565 title "Study on process of embedded passives based on FR4 substrate series" @default.
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- W2046720565 doi "https://doi.org/10.1109/icept.2010.5582686" @default.
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