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To enable the miniaturization, electrical performance and heterogeneous functionality needs for emerging Analog applications, a stacked Wafer-level Chip Scale Package (WCSP) package platform has been developed using Through-Silicon Via (TSV) technology. This allows stacking of ICs, MEMS, passives and other components in the vertical direction onto active or passive TSV wafers, to create innovative...
In this study, electromigration (EM) reliability of TSV-microbump (μ-bump) joints was investigated. Sn-based μ-bumps with three different schemes of metallization were tested under current stressing at elevated temperatures. EM-stressed μ-bumps, together with thermal anneal-only μ-bumps and as-received controls, were cross-sectioned and characterized using scanning electron microscope (SEM), energy...
In a continuous drive to achieve low form-factor packages, chip-to-package interconnections have evolved from the conventional solders to a more hybrid technology consisting of copper and solder. However, scaling down the bump pitch to increase the interconnect density poses serious reliability and yield issues. In the previous, a low-profile interconnect architecture, ~20µm total height, was demonstrated...
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