Abstract
The three-dimensional (3D) integration of electronics and/or MEMS-based transducers is an emerging technology that vertically interconnects stacked dies using through silicon vias (TSVs). They enable the realization of devices with shorter signal lengths, smaller packages and lower parasitic capacitances, which can result in higher performance and lower costs. This paper presents a novel low-cost fabrication technique for metal-filled TSVs using bonded gold-wires as conductive path. In this concept the wires are surrounded by polymer, which acts both as an electrical insulator causing low capacitive coupling towards the substrate and as a buffer for thermo-mechanical stress.
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