Cadence PCB Best Practices

Allegro/OrCAD Rigid Flex Design Creation Best Practices _______________________________________________________________________ Learn more at Cadence Online Support - https://support.cadence.com © 2015 Cadence Design Systems, Inc. All rights reserved worldwide. Page 3 Table of Contents Rigid Flex Stack Design Creation ................................................................................................................... 4 Subclass Definitions .................................................................................................................................. 4 Creating the Physical Outline .................................................................................................................... 5 Creating Rigid-Flex Stackups ......................................................................................................................... 7 Overview ................................................................................................................................................... 7 Mask Layer Site File ................................................................................................................................... 8 Rigid Flex Design Structure Example ......................................................................................................... 9 Stackup Details for Documentation ........................................................................................................ 22 Creating Multi-Stackup Zones in the Design Drawing ................................................................................ 24 Overview ................................................................................................................................................. 24 Creating a Zone ....................................................................................................................................... 24 Adding a Rectangle ............................................................................................................................. 25 Adding a Shape ................................................................................................................................... 27 Editing a Zone.......................................................................................................................................... 27 Special Zone Characteristics ................................................................................................................... 30 Flex and Rigid Flex Bend Areas ................................................................................................................... 33 Overview ................................................................................................................................................. 33 Defining a Bend Area .............................................................................................................................. 33 Modifying a Bend Area ........................................................................................................................... 36 The InterLayer Checks ................................................................................................................................. 38 Overview ................................................................................................................................................. 38 Using InterLayer Check Rules .................................................................................................................. 38 Gap ...................................................................................................................................................... 38 Overlap ................................................................................................................................................ 40 Inside Rules – 1 Inside 2 and 2 Inside 1 ............................................................................................... 42 Limitations of InterLayer Checks ............................................................................................................. 44 Summary ..................................................................................................................................................... 45 Support ....................................................................................................................................................... 45 Feedback ..................................................................................................................................................... 45

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