International Business Machines Corporation

Xiaoyun K Wu

Jason D Hibbeler

Matthew Thomas Guzowski

Leon Jacob Sigal

Michael S Gray

Christopher J Gonzalez

Kevin W McCullen

Robert F Walker

Stephen Larry Runyon

Xin Yuan

Rani Narayan

Veit Gernhoefer

Pieter J Woeltgens

Stephen I Runyon

Methods of independently migrating a hierarchical design are disclosed. A method for migrating a macro in an integrated circuit comprises: determining an interface strategy between a base cell in the macro and the macro, the base cell including an interface element involved in the interface strategy; migrating the base cell independently with respect to the macro based on the interface strategy; initially scaling the macro; swapping the migrated base cell into the macro; and legalizing content of the initially scaled macro.

Independent migration of hierarchical designs with methods of finding and fixing opens during migration

A method of modifying a VLSI layout for performance optimization includes defining a revised set of ground rules for a plurality of original device shapes to be modified and flattening the plurality of original device shapes to a prime cell. A layout optimization operation is performed on the flattened device shapes, based on the revised set of ground rules, so as to create a plurality of revised device shapes. An overlay cell is then created from a difference between the revised device shapes and the original device shapes.

Method for implementing overlay-based modification of VLSI design layout

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Hopewell Junction, NY, United States of America

Xiaoyun K Wu