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Silicon-selective dry etch for carbon-containing films

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TLDR
In this article, a SiConi etch in combination with a flow of reactive oxygen is described, which reduces the carbon content in the near surface region and allows the siConi™ etch to proceed more rapidly.
Abstract
A method of etching silicon-and-carbon-containing material is described and includes a SiConi™ etch in combination with a flow of reactive oxygen. The reactive oxygen may be introduced before the SiConi™ etch reducing the carbon content in the near surface region and allowing the SiConi™ etch to proceed more rapidly. Alternatively, reactive oxygen may be introduced during the SiConi™ etch further improving the effective etch rate.

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References
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Enhancement of remote plasma source clean for dielectric films

TL;DR: In this article, a remote plasma source is used to generate reactive species that clean interior surfaces of a processing chamber in the absence of RF power in the chamber, such as amorphous carbon films, barrier films comprising silicon and carbon, and low dielectric constant films.
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