Chin. Phys. Lett.  2007, Vol. 24 Issue (5): 1400-1402    DOI:
Original Articles |
Effect of Pretreatment of TaN Substrates on Atomic Layer Deposition Growth of Ru Thin Films
ZHOU Mi;CHEN Tao;TAN Jing-Jing;RU Guo-Ping;JIANG Yu-Long;LIU Ran;QU Xin-Ping
Department of Microelectronics, Fudan University, Shanghai 200433
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ZHOU Mi, CHEN Tao, TAN Jing-Jing et al  2007 Chin. Phys. Lett. 24 1400-1402
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Abstract The polycrystalline ruthenium films are grown on TaN substrates by atomic layer deposition (ALD) using bis(cyclopentadienyl) ruthenium [RuCp2] and oxygen as ruthenium precursor and reactant respectively at a deposition temperature of 330°C. The low-energy Ar ion bombardment and Ru pre-deposition are performed to the underlying TaN substrates before ALD process in order to improve the Ru nucleation. X-ray diffraction, x-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy are carried out to characterize the properties of ALD Ru films. The results show that the nucleation density of Ru films with Ar+ bombardment to the underlying TaN substrates is much higher than that of the ones without any pretreatment. The possible reasons are discussed.
Keywords: 85.40.Ls      81.15.Gh      81.65.-b     
Received: 27 December 2006      Published: 23 April 2007
PACS:  85.40.Ls (Metallization, contacts, interconnects; device isolation)  
  81.15.Gh (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))  
  81.65.-b (Surface treatments)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I5/01400
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ZHOU Mi
CHEN Tao
TAN Jing-Jing
RU Guo-Ping
JIANG Yu-Long
LIU Ran
QU Xin-Ping
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[12] Aaltonen T, Rahtu A and Ritala M 2003 Electrochem.Solid-State Lett. C 6 130
[13] Dey S K, Goswami J, Das A et al 2003 J. Appl. Phys. 94 774
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