Cadence Design Systems, Inc.

Paul S Musto

Randall Scott Lawson

Sean Bergan

Brett Allen Neal

Richard Allen Woodward, Jr

Jelena Radumilo-Franklin

Frank X Farmar

Joseph Dexter Smedley

Gregory M Horlick

Ken Wadland

Jilin Tan

Richard Woodward

Walter M Katz

Raymond Komow

Greg Horlick

Shangli Wu

Donald Keith Morgan

Roger Cleghorn

Shu Ye

Joe Smedley

A system and method are provided for establishing an automated routing environment in an electronic design automation (EDA) work flow for the routing of a circuit design. A user may merely specify a flow via pattern, a flow via location, and a start and end terminal and thereby, the auto router or path finder will automatically find the least-cost paths between each of the start terminals through at least one intermediate via of the flow via and ending at an end terminal. Upon successful routing of all needed terminals, an at least partially routed circuit design may be output.

Method and system for routing optimally between terminals through intermediate vias in a circuit design

A model library contains one or more storable models of a physical system each constructed by numerically solving relationships between a characteristic of the physical system given a set of model parameters. Such a model may be retrieved from the library according to values assigned to the model parameters and used to determine a corresponding characteristic of the physical system without repeating the numerical solution method originally used to create the model. Instead, a mapping may be applied to the storable model to seamlessly obtain the characteristic upon request.

Analysis of physical systems via model libraries thereof

A mechanism is provided for the user to define a circuit design intent or strategy in the form of data that is stored with the design database. An autorouter then uses this guidance from the user to create a plan for routing the design. The user can then modify their guidance to the router until the results for the plan are acceptable. Using the planned flow, the autorouter can complete the design, creating detailed paths including etch segments and vias. Allowing such interaction with an autorouter significantly reduces the routing time and hence time-to-market.

User-guided autorouting

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Hollis, NH, United States of America

Paul S Musto