Electrochemical Atomic Layer Etching of Ruthenium
Electrochemical Atomic Layer Etching of Ruthenium
复制标题
钌的电化学原子层蚀刻
DOI:
10.1149/1945-7111/ab864b
复制
发表时间:
2020
影响因子:
3.9
通讯作者:
Akolkar, Rohan
中科院分区:
文献类型:
--
作者:
Gong, Yukun;Akolkar, Rohan
A novel process for the electrochemical atomic layer etching (e-ALE) of ruthenium (Ru) is described. In this process, the surface Ru is electrochemically oxidized to form a monolayer of ruthenium (III) hydroxide—Ru (OH) 3. The Ru (OH) 3 monolayer is then selectively etched in an electrolyte containing chloride (Cl–) species. This etching process is selective towards Ru (OH) 3 and does not attack the underlying Ru metal. Adsorbed Cl–on the Ru electrode is then cathodically desorbed before the sequence of Ru oxidation and Ru (OH) 3 etching is repeated. This e-ALE sequence is shown to etch Ru at approximately 0.5 monolayer per cycle while practically avoiding any surface roughness amplification. The proposed Ru e-ALE process uses a single electrolyte which eliminates the need for electrode transfer or electrolyte switching between process steps. In this report, we employ electrochemical, microscopic and spectroscopic techniques to gain insights into the various characteristics of the Ru e-ALE process.
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DOI:
--
发表时间:
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期刊:
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--
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期刊:
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