Allegro/OrCAD Rigid Flex Design Creation Best Practices
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Special Zone Characteristics
Stackup zones provide the boundary and stackup information for a particular region of a design. They
also provide the awareness of non-existent layers for those particular regions. As a zone is created in the
database, route keepouts are added to prevent traces from being added into a zone where no
conductor layer exists. Zones also become placement aware so that when an SMD Package is placed in
a zone, the pads are pushed to the outermost conductor layer.
TOP and BOT TOM Ro ute keepo uts generated a s part o f the zo ne
When placing a component into a zone, the component padstack and geometry adjust for that zone.
Without requiring the user to set up the design for embedded geometry or creating special alternate
footprints, the tool leverages the embedded capability to place packages on legal conductor layers. The
