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Heteroleptic Precursors for Atomic Layer Deposition

机译:用于原子层沉积的异杀菌剂前体

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As the atomic layer deposition (ALD) method is based on sequential, self-limiting surface reactions the precursor chemistry is the key to a successful processing of conformal high quality thin films. ALD precursor chemistry has traditionally been based on homoleptic compounds such as, but not limited to, metal halides, alkylamides and alkoxides. However, these precursors sometimes have drawbacks such as possible halide contamination and low thermal stabilities. Consequently, heteroleptic precursors have been investigated as alternatives to the existing homoleptic counterparts, leading to the development of several advantageous processes. Here, examples of heteroleptic precursors for ALD processes of transition metals and their oxides are given. Special focus is given to oxides of the rare earths and groups 4 and 5. Trends in the properties of heteroleptic precursors are discussed. Several examples of our recent results are shown, including introduction of novel processes based on amidinate-cyclopentadienyl complexes for ALD of rare earth oxides.
机译:由于原子层沉积(ALD)方法基于顺序的,自限性的表面反应,因此前驱体化学性质是成功加工保形高质量薄膜的关键。 ALD前驱物化学传统上是基于均化化合物,例如但不限于金属卤化物,烷基酰胺和醇盐。然而,这些前体有时具有诸如可能的卤化物污染和低热稳定性的缺点。因此,已经研究了杂合香精的前体作为现有均混香精替代物的替代品,从而导致了几种有利方法的发展。在此,给出了用于过渡金属及其氧化物的ALD工艺的杂合剂前体的例子。特别关注稀土以及第4和第5组的氧化物。讨论了杂合前体性质的趋势。显示了我们最近结果的几个例子,包括介绍基于a胺-环戊二烯基络合物的稀土氧化物ALD新工艺。

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  • 会议地点 Cancun(MX)
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    Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki P.O. Box 55, FI-00014 Helsinki, Finland;

    Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki P.O. Box 55, FI-00014 Helsinki, Finland;

    Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki P.O. Box 55, FI-00014 Helsinki, Finland;

    Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki P.O. Box 55, FI-00014 Helsinki, Finland;

    Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki P.O. Box 55, FI-00014 Helsinki, Finland;

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