Cadence PCB Best Practices

Working with Backdrilling Backdrilling October 2019 33 Product Version 17.4-2019 © 1999-2020 All Rights Reserved. The Depth column in the Backdrill Setup and Analysis form and the analysis report provides maximum backdrill depths based on the layout cross-section. Prior to executing Backdrill The final step is to ensure that all of your padstacks contain backdrill information that can be used at each backdrill location. Padstack Parameters Tab of the Backdrill Setup and Analysis Form Padstacks which do not have backdrill data are automatically updated based on the criteria in this tab. Padstacks with user-defined backdrill data, from the library or manually entered in

• Cover
• Contents
• Backdrilling
• Introduction
• Licensing
• Prerequisites
• Backdrill Commands, Properties, Parameters, and Subclasses
• Terminology
• Net Identification
• Applying the BACKDRILL_MAX_PTH_STUB Property in Constraint Manager
• Stub Calculation
• Pin Plating Restrictions
• Applying the Minimum Pin Plating Property
• Pressfit Connectors
• Backdrill Exclusions
• User Overrides
• Fabrication Vendor Backdrill requirements (Reference Only)
• Setup and Analysis User Interface
• Initially Launching the Backdrill Setup and Analysis Dialog Box
• Prior to executing Backdrill
• Padstack Parameters Tab of the Backdrill Setup and Analysis Form
• Flag Codes tab of the Backdrill Setup and Analysis form
• Final Backdrill Steps – Executing Backdrill
• Manufacturing Stub Length Analysis (Drill Parameters Tab)
• Effects of Setting a Manufacturing Stub Length:
• Layer Pairs tab feedback – Depth column yellow cells:
• Backdrill Canvas Display Controls
• Backdrill Data Show Element visibility (Pins/Vias)
• DRC and Shape Voiding
• Board Testability
• NC Drill and Legend Output
• Enabling Backdrill Output
• NC Backdrill Legends
• Legend Customization
• Backdrill Cross Section Chart Display