Abstract

Power delivery network integrity is very important for the high performance printed circuit boards (PCBs) designs. The direct current (DC) analysis of power/ground networks in PCBs plays the central roles for the power delivery integrity check. In this paper, we propose a novel two-dimensional finite element method (FEM) based DC power networks integrity analysis for PCBs. Unlike the existing 3D finite element based DC analysis such as the Cadence Sigrity PowerDC tool, 2D finite elements are used in the new method for space discretization so that the number of elements can be significantly reduced. To model the vertical vias and horizontal connects among different layers and parts in PCBs, simple resistive line elements are used to further redudce elements. To further reduce the number of elements, a novel contour shape modeling method is introduced so that we can easily trade off the efficiency and accuracy. Our experimental results show that the proposed 2D PCB DC solver is 29.29% faster than the commercial PowerDC tool with similar accuracy on the practical industry PCB designs.

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