Patent ID: 6567717
Filing Date: 2003-05-20
Classification: H01L

Abstract:
A computer system for use in a mass production stream wherein upstream production samples each have at least one of a gate structure of directly or indirectly measured length and one or more adjacent gate sidewalls of directly or indirectly measured thickness, and wherein production results of downstream production steps are affected by said at least one of the gate structure length and the one or more gate sidewall thicknesses, said computer system comprising:(a) error determining means for determining one or more corresponding amounts of error in one or more production samples between the measured sidewall thickness and a pre-specified, target sidewall thickness or between the measured gate length and a pre-defined, target gate length; (b) error signal forwarding means for feeding forward error signals representing said corresponding amounts of error; and (c) downstream compensating means for receiving said fed forward error signals and for post-compensating for errors, if any, indicated by the fed forward error signals.