Invention Grant
US09558545B2 Predicting and controlling critical dimension issues and pattern defectivity in wafers using interferometry 有权
使用干涉测量预测和控制晶片中的关键尺寸问题和图案缺陷

Predicting and controlling critical dimension issues and pattern defectivity in wafers using interferometry
Abstract:
Systems and methods for predicting and controlling pattern quality data (e.g., critical dimension and/or pattern defectivity) in patterned wafers using patterned wafer geometry (PWG) measurements are disclosed. Correlations between PWG measurements and pattern quality data measurements may be established, and the established correlations may be utilized to provide pattern quality data predictions for a given wafer based on geometry measurements obtained for the give wafer. The predictions produced may be provided to a lithography tool, which may utilize the predictions to correct focus and/or title errors that may occur during the lithography process.
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