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http://dx.doi.org/10.4283/JMAG.2010.15.3.132

Satistical Analysis of SiO2 Contact Hole Etching in a Magnetically Enhanced Reactive Ion Etching Reactor  

Liu, Chunli (Department of Physics, Hankuk University of Foreign Studies)
Shrauner, B. (Department of Electrical and Systems Engineering, Washington University)
Publication Information
Journal of Magnetics / v.15, no.3, 2010 , pp. 132-137 More about this Journal
Abstract
Plasma etching of $SiO_2$ contact holes was statistically analyzed by a fractional factorial experimental design. The analysis revealed the dependence of the etch rate and DC self-bias voltage on the input factors of the magnetically enhanced reactive ion etching reactor, including gas pressure, magnetic field, and the gas flow rates of $CHF_3$, $CF_4$, and Ar. Empirical models of the DC self-bias voltage and etch rate were obtained. The DC self-bias voltage was found to be determined mainly by the operating pressure and the magnetic field, and the etch rate was related mainly to the pressure and the flow rates of Ar and $CHF_3$.
Keywords
Plasma; $SiO_2$; magnetically enhanced reactive ion etching;
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