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To propose an appropriate cooling solution for a three-dimensional (3D) chip stack at the design phase, it is necessary to estimate the total thermal resistance of a 3D chip stack. The interconnection between stacked chips is considered as one of the thermal resistance bottleneck of a 3D chip stack, but it is not experimentally clear yet. We have previously measured the thermal conductivity of SnAg...
Three-dimensional (3D) chip stacks are receiving more attention for system performance enhancements. However, because of the higher circuit density, the cooling of 3D chip stacks gets more challenging. In conventional cooling methods, a heat sink or a micro-channel cooler is located at the top of the chip to dissipate the generated heat in a chip. In this paper, possible cooling methods from the bottom...
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