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http://dx.doi.org/10.6109/jkiice.2014.18.6.1401

A Study of Data correction method when in-situ end point detection in Chemical-Mechanical Polishing of Copper Overlay  

Kim, Nam-Woo (Department of Electronic Engineering, Mokwon University)
Hur, Chang-Wu (Department of Electronic Engineering, Mokwon University)
Abstract
Knowledge of the manufacturing process of semiconductor devices in order to obtain a copper pattern using chemical mechanical polishing (CMP) planarization using a Wafer polishing process is applied with a thickness of the copper measured in real time, which need to be precisely controlled by, where the acquisition the actual thickness of the sensor value with the calculated value in terms of error can occur in the process. Approximated the actual measurement values so as to obtain a method using a simple average, moving average, compared to the results using filters onggo Strom real-time measurements of the thickness of the units of the control system to reduce the variation in the implementation of the method described for the.
Keywords
Eddy current; Sensor; Cu wafer; CMP;
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  • Reference
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