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Method for Efficient Tuning of Net Wire Routes in a VLSI Design

IP.com Disclosure Number: IPCOM000241841D
Publication Date: 2015-Jun-03
Document File: 2 page(s) / 49K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for efficient tuning of net wire routes in a Very Large-Scale Integration (VLSI) design. Beginning with the existing wire routing solution created by a routing tool, the method then performs iterative refinements and improvements to the existing wire routes, leaving the original routing topologies intact.

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Method for Efficient Tuning of Net Wire Routes in a VLSI Design

The implementation of many Very Large-Scale Integration (VLSI) designs is done using an automatic wire routing software tool that electrically connects the functional components in a design using metal wire and via interconnect . The algorithms used by such routing tools consider a complex space of variables and constraints to provide a routing solution. The solutions delivered tend to comprise a form of averaging of this complex space of variables and constraints. This leaves room for additional, targeted

wire route optimization by additional software, which focuses on a much smaller set of specific variables and constraints to provide additional refinements and improvements to the solution delivered by the routing tool.

Beginning with the existing wire routing solution created by a routing tool, the novel contribution is a method to then perform iterative refinements and improvements to the existing wire routes, leaving the original routing topologies intact.

Each electrical signal net in a VLSI design is physically connected by a set of wire segments and vias. Each wire segment comprises a single metal layer straight-line

wire connection between two points in space. Vias connect wire segments on different metal layers together at the segment end points. A super segment is defined as a maximal set of wire segments and associated vias that implements a straight -line connection with no jogs. All wi...