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Signal through-the-silicon via (STS-via) planning plays an important role in multi-layer nets which need vertical interconnection between different device layers. Moreover, STS-via can also dissipate heat, which is a much more serious problem in 3D ICs than in 2D ICs. Since the through-the-silicon via is large and can only be inserted into whitespace of the device layer, planning STS-via for thermal...
As technology advances, the interconnect delay among modules plays dominant role in chip performance. Buffer insertion, as a traditional approach to reduce wire delay in 2D ICs, is still necessary in 3D ICs to further optimize interconnects. Since those cross multi-layer nets in 3D ICs need to go through vertical interlayer via, the traditional buffer planning turns into simultaneous buffer and interlayer...
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