Patent ID: 6793765
Filing Date: 2004-09-21
Classification: H01J,H01L

Abstract:
A system for determining and controlling a microloading effect in order to achieve desired isolated and dense feature depth on a wafer during feature fabrication comprising:a semiconductor structure having one or more layers formed over a substrate; a fabrication process assembly for forming one or more features in the semiconductor structure; a microloading characterization system for monitoring the fabrication process assembly, for measuring feature depth, and for processing the measurements in order to determine the microloading effect, the microloading characterization system operable to provide output based on data from a detection apparatus, wherein the detection apparatus is operatively coupled to the microloading characterization system and the output from the microloading characterization system comprises numerical data and calculated values relating to an amount of microloading on the semiconductor structure; and a control system for regulating the fabrication process based on the output from the microloading characterization system.