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arXiv · 2210.14259

Net Separation-Oriented Printed Circuit Board Placement via Margin Maximization

Chung-Kuan Cheng·Chia-Tung Ho·Chester Holtz
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Abstract

Packaging has become a crucial process due to the paradigm shift of More than Moore. Addressing manufacturing and yield issues is a significant challenge for modern layout algorithms. We propose to use printed circuit board (PCB) placement as a benchmark for the packaging problem. A maximum-margin formulation is devised to improve the separation between nets. Our framework includes seed layout proposals, a coordinate descent-based procedure to optimize routability, and a mixed-integer linear programming method to legalize the layout. We perform an extensive study with 14 PCB designs and an open-source router. We show that the placements produced by NS-place improve routed wirelength by up to 25\%, reduce the number of vias by up to 50\%, and reduce the number of DRVs by 79\% compared to manual and wirelength-minimal placements.

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Chung-Kuan Cheng, Chia-Tung Ho, Chester Holtz. 2022-10-25. Net Separation-Oriented Printed Circuit Board Placement via Margin Maximization. https://doi.org/10.1109/asp-dac52403.2022.9712480

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