PCB stackup analysis and design, Part 2: Stackup analysis can help to optimize layer count, trace width and spacing and electrical performance.

Printed Circuit Design & FabVol. 25 Nbr. 12, December 2008

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PCB stackup analysis and design, Part 2: Stackup analysis can help to optimize layer count, trace width and spacing and electrical performance.

WHEN DESIGNING a PCB stackup, it is essential to consider crosstalk (1) requirements. Depicted by FIGURE 4 are two single-ended traces having line width W, thickness t, edge-to-edge separation Sn and height over reference plane H. Er is the relative dielectric constant of the substrate.

In order to minimize crosstalk, it is desirable to set H as small and Sn as large as allowed by board target

impedance and routing restrictions. (14) The effect of these stackup param...

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