Issue link: https://resources.pcb.cadence.com/i/1180264
Working with Backdrilling Backdrilling October 2019 38 Product Version 17.4-2019 © 1999-2020 All Rights Reserved. Manufacturing Stub Length Analysis (Drill Parameters Tab) There is an advanced setup for Backdrill and Analysis to verify that the remaining stub length after backdrill is manufacturable by specifying a manufacturing stub length. This is a fabrication vendor driven value and should not be confused with the minimum Electrical Stub requirements which is defined using the BACKDRILL_MAX_PTH_STUB Property. It is the remaining stub that can be reliably manufactured without comprising the Must Not Cut Layer. The default value of manufacturing stub length is 0.00 which disables the advanced analysis and reporting. Entering the stub value provided by the fabricator turns on the advanced analysis and layer pair violation reporting to influence your backdrill decisions. This value is also reported in the Backdrill Analysis log file and in the Backdrill Drill Legends. Backdrill Analyzes and generates backdrill data on pins/vias in the design. Padstacks which do not have any backdrill data are updated using the Padstack Parameters tab. All other padstacks with user-defined backdrill data entered in the design or in the library remain unchanged. Purge Removes backdrill data on pins/vias and from design padstacks which were updated based on the criteria under the Padstack Parameter tab.