The change in the Li–F/Li–O ratio showed a trend almost similar to the etch rate in Figure 6 .
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Enhancing the Plasma-Resistance Properties of Li<sub>2</sub>O-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> Glasses for the Semiconductor Etch Process via Alkaline Earth Oxide Incorporation.
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