Allegro/OrCAD Rigid Flex Design Creation Best Practices
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Inside Rules – 1 Inside 2 and 2 Inside 1
The Inside rules are used to check that a graphical element on one subclass is contained within another
geometry defined on another subclass. For example, an epoxy adhesive can be used as a stiffener. The
adhesive edge to stiffener edge distance must have a minimum value of 1.27mm to prevent the epoxy
from leaking out the sides of the stiffener.
1. In Constraint Manager Inter Layer rules, select the two subclasses:
Select the subclass EPOXY_BOTTOM.
This will be designated as Layer 1.
Select Layer 2 as the STIFFENER_BOTTOM subclass.
With the EPOXY_BOTTOM subclass contained within the STIFFENER_BOTTOM, the rule 1 Inside
2 is selected, indicating that Layer 1 is within the bounds of the object on Layer 2.
2. Assign the edge to edge spacing value as 1.27mm.
3. Set the DRC label to "e" for epoxy.
4. Assign the DRC Display Layer to INTER_LAYER.
5. Add a note, if required.
D efinin g a 1 Ins ide 2 ru le
As the user adds the geometry that represents the epoxy adhesive, the DRC checks the distance
between the epoxy geometry and the stiffener geometry edges. If in violation, a DRC will display
indicating the issue.
