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2020 Fiscal Year Final Research Report

Surface reaction mechanisms for plasma enhanced atomic layer etching process by organic compounds

Research Project

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Project/Area Number 18K13532
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14030:Applied plasma science-related
Research InstitutionOsaka University

Principal Investigator

Ito Tomoko  大阪大学, 工学研究科, 助教 (10724784)

Project Period (FY) 2018-04-01 – 2021-03-31
Keywordsアトミックレイヤーエッチング / 遷移金属
Outline of Final Research Achievements

In this study, adsorption state of β-diketone molecules on magnetic metal surfaces were evaluated using the atomic layer etching process surface analysis system that we developed for this study. It was found that the presence of oxygen on the magnetic metal surfaces is important for the stable adsorption of β-diketone (hexafluoroacetylacetone and acetylacetone) molecules, and the metal oxide layer can be preferentially removed by heating the substrate. It was also found that even low-energy Ar+ ion irradiation (10-50eV) of an adsorbed pre-oxidized Ni causes breakdown of hexafluoroacetylacetone molecules on the surface.

Free Research Field

プラズマ応用

Academic Significance and Societal Importance of the Research Achievements

デバイス構造の複雑化および高集積化の要請を受け、デバイスプロセスに求められる加工寸法は原子スケールにまで迫っている中、本研究で得られた研究結果は、反応性プラズマエッチングプロセスにおいて難エッチング材料として知られる遷移金属材料に対して、ハロゲンに代わる反応性ガスとしてβジケトンガスを用いて原子層エッチング(ALE)反応が得られる可能性を示唆するものであり、βジケトンガスを用いた遷移金属材料に対する原子層エッチングプロセス開発の上で、非常に重要な価値があると考えられる。

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Published: 2022-01-27  

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