Cadence PCB Best Practices

High Density Interconnect (HDI)

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High Density Interconnect Working with HDI October 2019 12 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. control stacking, and stacked vias are seen as a group entity with options for breaking the stack when necessary. For more information, see Working with Constraint Objects in the Constraint Manager User Guide. Constraint Manager – Same Net Spacing Domain Same Net Spacing rules are managed entirely within the Same Net Spacing domain in Constraint Manager. An equivalent Same Net DRC represents each Spacing DRC. The Same Net domain is structured similarly to the Spacing domain, in terms of constraint inheritance and overrides. Constraint objects unsupported in the domain are Net Class-Class and Region Class-Class, as they are used exclusively for net-net rules. For more information, see Domains, Workbooks, Worksheets, and Cells in the Constraint Manager User Guide. Figure 1-5 Same Net Spacing Domain Same Net Constraint Set The Same Net system supports a Same Net CSet, abbreviated SNSC, which can be applied to net or hierarchical elements. The CSet enables the Same Net DRC on a layer basis. For more information, see the Objects – Create – Same Net Spacing CSet command in the Constraint Manager Reference.

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