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Will Rogers said that an economist’s guess is liable to be as good as anyone’s, but with advanced-node optical lithography, I might have to disagree. Unlike the fickle economy, the distorting effects of the mask and lithographic system are ruled by physics, and so can be modeled.
In this installment, I’ll talk about two critical… Read More
Wyatt Earp probably wasn’t thinking of OPC when he said, “Fast is fine, but accuracy is everything,” but I’ll adopt that motto for this discussion of full-chip OPC and post-OPC verification models.
Accuracy is the difference between the calibrated model prediction and the calibration wafer result. Accuracy depends on several… Read More