Working with Backdrilling in Allegro PCB Designer: Best Practices
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2. Create layer pairs based on Design Backdrill Analysis: (Analysis – lower
section):
Enable Minimize electrical stub length or Minimize layer pairs. Next,
select the Create button in the section to create the backdrill layer pairs
based on the backdrill analysis of the design, and then select the Close
button to see the layer pairs.
Generate layer pairs based on Analysis – Minimize electrical stub length
