Version management mechanism for fluid guard ring PCells

摘要

A version management system for fluid guard ring (FGR) PCells uses one or more new version management parameters that are added to the FGR PCell definition to manage the source code versions for a PCell. The system saves instance layout information with a version management parameter that identifies the current PCell source code version for each FGR PCell instance. When evaluated using a newer version of the PCell source code, the instance layout information generated with a previous version of PCell source code can be retrieved. The retrieved layout information will be used during evaluation of the PCell to ensure the integrity of the PCell geometries that were previously verified. The saved layout information will be uniquely identifiable with a hash code of the name-value pairs for one or more parameters associated with the PCell instance.

主权项

1. A method for using a processor for version management for fluid guard ring PCells in a circuit design, the method comprising:
upon saving the circuit design, identifying each instance of a fluid guard ring PCell in the design; for each instance of a fluid guard ring PCell in the design:
identifying a version management parameter associated with the instance, andfor an instance having an associated version management parameter not equal to zero, generating a hash code from a plurality of parameters associated with the instance and saving a cellview for the instance to a memory device, the saved cellview identifiable by the generated hash code, using a processor.