Gate modeling for semiconductor fabrication process effects

Computer-aided design and analysis of circuits and semiconductor – Design of semiconductor mask or reticle – Layout generation

Reexamination Certificate

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Details

C716S126000, C716S132000, C716S139000, C703S014000

Reexamination Certificate

active

08051393

ABSTRACT:
In one embodiment, a method for determining a contour simplification of an object for a simulation is provided. An object in a layout of a transistor design to be created with the photolithographic process is determined. The object includes a width and a length in the layout. A contour simulation is performed to determine a generated contour object. The contour simulation simulates parametric variation factors that may occur in the photolithographic process. An adjusted width and adjusted length of the object is then determined based on the generated contour object. The adjusted width and the adjusted length are usable to determine a parametric model for simulation of the object. For example, a layout versus schematic (LVS) tool may back-annotate the layout. Then, a SPICE simulation may use the output of the LVS tool to verify the electrical behavior of the transistor using the adjusted width and adjusted length.

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