Lucent Technologies Inc.

Cadence Design Systems, Inc.

Shun-Lin Su

Chi-Yuan Lo

Yue-Zhong Shu

Kuang-Wei Chiang

Doowan Paik

Using an adaptive square mesh for parasitic extraction, small squares of a predetermined minimum size will be placed where accuracy in the parasitic calculations is most critical&#x2014;around edges, contacts and vias, and corners. Then, in areas where the parasitic analysis is less critical, for example in open spaces, a more coarse grid consisting of larger squares may be used to calculate the parasitic values in those spaces. Squares in the mesh may increase in size gradually to provide more accurate results.

Method to adaptively calculate resistor mesh in IC designs

A method of compressing data used in integrated circuit (IC) layout verifications includes the steps of identifying each circuit component from each layer of the IC chip; sorting each circuit component in an established order; identifying predetermined parameters for each component; determining the difference in value of the parameters for each pair of components in successive order; and storing the difference values for each pair of components.

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Macungie, PA, United States of America

Shun-Lin Su