Reliable Power Grid Network Design Framework Considering EM Immortalities for Multi-Segment Wires
Reliable Power Grid Network Design Framework Considering EM Immortalities for Multi-Segment Wires
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DOI：
10.1109/asp-dac47756.2020.9045673
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发表时间：
2020-01
期刊：
影响因子：
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通讯作者：
Han Zhou;Shuyuan Yu;Zeyu Sun;S. Tan
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文献类型：
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作者：
Han Zhou;Shuyuan Yu;Zeyu Sun;S. Tan
本文提出了一种新的电网网络设计和优化技术，考虑了新的EM不朽约束，由于EM空隙饱和体积的多段互连。空隙可以增长到其饱和体积而不显著改变导线电阻。然而，这一现象在现有的EM感知优化方法中被忽略。通过考虑这种新的影响，我们可以在EM感知的片上电源网格设计中去除更多的保守性。沿着最近提出的多段线的成核相不朽约束，我们表明，这两个EM不朽约束可以自然地集成到现有的基于编程的电网优化框架。为了进一步减轻现有的不朽约束优化方法过于保守的问题，我们进一步探索两种策略：首先，我们的大小失败的电线，以满足受设计规则的不道德条件之一;第二，我们考虑电磁感应老化对电源网络的目标寿命，这使得一些短寿命的电线失败，并优化其余的电线。对IBM格式电网的算例分析表明，与现有EM不朽约束优化方法相比，该方法可以减少更多的电网面积。此外，新的方法可以优化电网与核线，这将是不可能的与现有的方法。
This paper presents a new power grid network design and optimization technique that considers the new EM immortality constraint due to EM void saturation volume for multi-segment interconnects. Void may grow to its saturation volume without changing the wire resistance significantly. However, this phenomenon was ignored in existing EM-aware optimization methods. By considering this new effect, we can remove more conservativeness in the EM-aware on-chip power grid design. Along with recently proposed nucleation phase immortality constraint for multi-segment wires, we show that both EM immortality constraints can be naturally integrated into the existing programming based power grid optimization framework. To further mitigate the overly conservative problem of existing immortality-constrained optimization methods, we further explore two strategies: first we size up failed wires to meet one of the immorality conditions subject to design rules; second, we consider the EM-induced aging effects on power supply networks for a target lifetime, which allows some short-lifetime wires to fail and optimizes the rest of the wires. Numerical results on a number of IBM-format power grid networks demonstrate that the new method can reduce more power grid area compared to the existing EM-immortality constrained optimizations. Furthermore, the new method can optimize power grids with nucleated wires, which would not be possible with the existing methods.