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Design aiding apparatus and method for designing a semiconductor device

Image Number 2 for United States Patent #6024478.

An electric work station calculates an output load of a selected cell based on information from at least one of a design cell information library, a logic circuit information library and a layout information library. The work station further calculates a hot carrier dependent lifetime of a transistor in the cell by using the computed output load and information from a reliability information library, and verifies reliability of the cell by comparing the calculated lifetime with a reference value.

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