Working with Backdrilling in Allegro PCB Designer: Best Practices
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Final Backdrill Steps – Executing Backdrill
Disable Dynamic shape update during backdrill – When Backdrill is executed. route
keepouts are added to all backdrill locations to maintain backdrill hole clearance. On
designs with a lot of dynamic shapes might see a performance impact during backdrill.
This setting allows you to disable dynamic shape update.
Backdrill status
• Red – Backdrill data are out of date, select the Backdrill button to update.
• Green – Backdrill data on pins/vias are in sync.
• Grey – No backdrill data saved on pins/vias yet.
OK button – Close form and save settings with no backdrill data generated.
Cancel button – Close form and discard updated settings.
Analyze button – Analyze design only and report backdrill information, but do not add
backdrill data on pins/vias or update padstack backdrill values.
ViewLog button – Display the last generated Backdrill and Analysis report.
Backdrill button – Analyze and generate backdrill data on pins/vias in the design.
Padstacks which do not have any backdrill data will be updated using the Padstack
Parameters tab, all other padstacks with user-defined backdrill data entered in the
design or in the library will remain unchanged.
Purge button – Remove Backdrill data on pins/vias and from design padstacks, which
were updated based on the criteria under the Padstack Parameter tab.
