Oracle International Corporation

Numerical Technologies, Inc.

Deepak Agrawal

Yao-Ting Wang

Fang-Cheng Chang

Bhushan Khaladkar

Myunghoon Yoon

Tomas Saulys

Hyungjip Kim

Sheng-Yih Guan

Ian Macky

Described herein are techniques that allow applications developed in non-object oriented languages, such as C, to interact with DOM trees implemented under different DOM implementations. An application accesses different DOM implementations through a set of function pointers that conform to a set of function signatures. The set of function pointers may be stored in a data structure defined to have member function pointers that point to functions that conform to the set of function signatures. The set of function signatures define a common interface through which applications may interact with a variety of DOM implementations. One or more applications generate the set of function pointers and store them in a data structure. The other applications register the function pointers with an application by, for example, passing a pointer to the data structure to the application.

Call back structures for user defined DOMs

Layout processing can be applied to an integrated circuit (IC) layout using a shape-based system. A shape can be defined by a set of associated edges in a specified configuration. A catalog of shapes is defined and layout processing actions are associated with the various shapes. Each layout processing action applies a specified layout modification to its associated shape. A shape-based rule system advantageously enables efficient formulation and precise application of layout modifications. Shapes/actions can be provided as defaults, can be retrieved from a remote source, or can be defined by the user. The layout processing actions can be compiled in a bias table. The bias table can include both rule-based and model-based actions, and can also include single-edge shapes for completeness. The scanning of the IC layout can be performed in order of increasing or decreasing complexity, or can be specified by the user. The appropriate layout processing actions are applied to matching portions of the IC layout to form the corrected photomask layout. This process can be sequential or batch mode. Shape and action conflicts can be resolved by marking identified/modified elements or by designing rules for orderly resolution of any inconsistencies or overlaps.

General purpose shape-based layout processing scheme for IC layout modifications

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Milpitas, CA, United States of America

Deepak Agrawal