https://scholars.lib.ntu.edu.tw/handle/123456789/616392
標題: | 5 nm ruthenium thin film as a directly plateable copper diffusion barrier | 作者: | Arunagiri T.N. Zhang Y. Chyan O. El-Bouanani M. Kim M.J. Chen K.H. Wu C.T. Chen L.C. LI-CHYONG CHEN |
公開日期: | 2005 | 卷: | 86 | 期: | 8 | 起(迄)頁: | 1-3 | 來源出版物: | Applied Physics Letters | 摘要: | Interfacial stability of electroplated copper on a 5 nm ruthenium film supported by silicon, Cu (5 nm Ru) Si, was investigated using Rutherford backscattering and high-resolution analytical electron microscopy. Transmission electron microscopy (TEM) imaging shows that a 5 nm Ru film is amorphous in contrast to the columnar microstructures of thicker films (20 nm). Direct Cu plating on a 5 nm Ru film yielded a homogeneous Cu film with over 90% plating efficiency. It is demonstrated that 5 nm Ru can function as a directly plateable Cu diffusion barrier up to at least 300 °C vacuum anneal. TEM reveals an interlayer between RuSi, which expands at the expense of Ru upon annealing. Electron energy loss spectroscopy analyses show no oxygen (O) across the Cu (5 nm Ru) Si interfaces, thereby indicating that the interlayer is ruthenium silicide (Rux Siy). This silicidation is mainly attributed to the failure of the ultrathin Ru barrier at the higher annealing temperature. © 2005 American Institute of Physics. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-17044374035&doi=10.1063%2f1.1867560&partnerID=40&md5=f7a82cb9b83f04da965e57d34238dd9a https://scholars.lib.ntu.edu.tw/handle/123456789/616392 |
ISSN: | 00036951 | DOI: | 10.1063/1.1867560 | SDG/關鍵字: | Columnar microstructure;Interfacial stability;Silicidation;Thin interlayers;Copper;Electron energy loss spectroscopy;Electroplating;Energy dispersive spectroscopy;Ruthenium;Rutherford backscattering spectroscopy;Thickness measurement;Transmission electron microscopy;Thin films |
顯示於: | 凝態科學研究中心 |
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