Synopsys, Inc.

Mathieu Eric Drut

Philippe Aubert McComber

Friedrich Gunter Kurt Sendig

Hsiang-Wen Jimmy Lin

Arthur Nieuwoudt

William Patrick Pinello

Beifang Qiu

A customizable routing system allows designers to create custom connection layouts that can be stored, turned into templates, reused, and further customized. The system describes designer-input custom connection layouts in terms of 'structural directives' that specify its patterns and properties instead of using precise dimensions. Structural directives may describe particular connection patterns between structural components (e.g., backbone or fishbone), the placement, width, direction or layer of specific structural components, and properties of structural components relative to other components. These structural directives are implemented generally during routing, such as through design constraints, which allows the router to locally optimize the design (e.g., for cost or wire length) while considering the structural intentions of the designer. The system can also learn and replicate customization patterns based on existing layout templates by comparing connectivity information to that of existing layout templates and applying applicable structural directives.

Creating and reusing customizable structured interconnects

A computer-implemented method of extracting parasitics associated with a circuit design layout generated by modifying a previous iteration of the layout, includes, in part, identifying a first multitude of nets that have been changed in the circuit design layout relative to the previous iteration of the circuit design layout. The method further includes, in part, calculating a first multitude of parasitic capacitance values between each of the first multitude of first nets and each of a second multitude of nets disposed in proximity of the first multitude of nets. The method further includes, in part, identifying each net in the second multitude of nets as an aggressor net if a number defined by the net's associated parasitic capacitance value is higher than a threshold value. The method further includes excluding nets in the second multitude of second nets that are not identified as aggressor nets from the parasitic extraction.

Determining ECO aggressor nets during incremental extraction

Growing community of inventors

Santa Clara, CA, United States of America

Mathieu Eric Drut