Properties of plasma-enhanced atomic layer deposited TiCx films as a diffusion barrier for Cu metallization

2015 ◽  
Vol 590 ◽  
pp. 311-317 ◽  
Author(s):  
Sang-Kyung Choi ◽  
Hangil Kim ◽  
Junbeam Kim ◽  
Taehoon Cheon ◽  
Jong Hyun Seo ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Atomic Layer ◽  
Cu Metallization

scholarly journals Characterization of Atomic Layer DepositedWNxCy Thin Film as a Diffusion Barrier for CopperMetallization

2003 ◽  
Vol 766 ◽  
Author(s):  
Soo-Hyun Kim ◽  
Su Suk Oh ◽  
Hyun-Mi Kim ◽  
Dae-Hwan Kang ◽  
Ki-Bum Kim ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Rutherford Backscattering Spectrometry ◽  
Atomic Layer ◽  
Lattice Parameter ◽  
Grain Structure ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
Cu Metallization ◽  
Sputter Deposited ◽  
Deposited Film

AbstractThe film properties of WNxCy films deposited by atomic layer deposition (ALD) using WF6, NH3, and triethylboron source gases were characterized as diffusion barrier for Cu metallization. It is noted that the as-deposited film shows an extremely low resistivity of about 350 μΔ-cm with a film density of 15.37 g/cm3. The film composition measured from Rutherford backscattering spectrometry shows W, C, and N of approximately 48, 32, and 20 at.%, respectively. Transmission electron microscopy analyses show that the as-deposited film is composed of face-centered-cubic phase with a lattice parameter similar to both β-WC1-x and β-W2N with an equiaxed microstructure. The barrier property of this ALD-WNxCy film at a nominal thickness of 12 nm deposited between Cu and Si fails only after annealing at 700°C for 30 minutes while the sputter-deposited Ta (12 nm) and ALD-TiN (20 nm) fail at 650 and 600°C, respectively. It is thought that the superior diffusion barrier performance of ALD-WNxCyfilm is the consequence of both nanocrystalline equiaxed grain structure and the formation of high density film.

Highly Conformal Amorphous W–Si–N Thin Films by Plasma-Enhanced Atomic Layer Deposition as a Diffusion Barrier for Cu Metallization

2015 ◽  
Vol 119 (3) ◽  
pp. 1548-1556 ◽  
Author(s):  
Tae Eun Hong ◽  
Jae-Hun Jung ◽  
Seungmin Yeo ◽  
Taehoon Cheon ◽  
So Ik Bae ◽  
...  
Keyword(s):  
Thin Films ◽  
Atomic Layer Deposition ◽  
Diffusion Barrier ◽  
Atomic Layer ◽  
Cu Metallization ◽  
Layer Deposition

Characterization of Atomic Layer Deposited Ultrathin HfO2 Film as a Diffusion Barrier in Cu Metallization

2007 ◽  
Vol 990 ◽  
Author(s):  
Prodyut Majumder ◽  
Rajesh Katamreddy ◽  
Christos G Takoudis
Keyword(s):  
Diffusion Barrier ◽  
Photoelectron Spectroscopy ◽  
Effective Diffusion ◽  
Atomic Layer ◽  
X Ray Diffraction ◽  
Hfo2 Film ◽  
X Ray ◽  
Cu Metallization ◽  
Layer Deposition ◽  
Different Temperatures

ABSTRACTThermally stable, amorphous HfO2 thin films deposited using atomic layer deposition have been studied as a diffusion barrier between Cu and the Si substrate. 4 nm thick as-deposited HfO2 films deposited on Si are characterized with X-ray photoelectron spectroscopy. Cu/HfO2/<Si> samples are annealed at different temperatures, starting from 500 °C, in the presence of N2 atmosphere for 5 min and characterized using sheet resistance, X-ray diffraction and scanning electron microscopy. Ultrathin HfO2 films are found to be effective diffusion barrier between Cu and Si with a high failure temperature of about 750 °C.

Structural and Electrical Characterization of Si-Implanted TiN as a Diffusion Barrier for Cu Metallization

1995 ◽  
Vol 391 ◽  
Author(s):  
W.F. Mcarthur ◽  
K.M. Ring ◽  
K.L. Kavanagh
Keyword(s):  
Leakage Current ◽  
Diffusion Barrier ◽  
Depth Profiling ◽  
Electrical Characterization ◽  
Implantation Dose ◽  
Cu Metallization ◽  
Reverse Leakage Current ◽  
Transmission Electron ◽  
Current Voltage

AbstractThe feasibility of Si-implanted TiN as a diffusion barrier between Cu and Si was investigated. Barrier effectiveness was evaluated via reverse leakage current of Cu/TixSiyNz/Si diodes as a function of post-deposition annealing temperature and time, and was found to depend heavily on the film composition and microstructure. TiN implanted with Si28, l0keV, 5xl016ions/cm2 formed an amorphous ternary TixSiyNz layer whose performance as a barrier to Cu diffusion exceeded that of unimplanted, polycrystalline TiN. Results from current-voltage, transmission electron microscopy (TEM), and Auger depth profiling measurements will be presented. The relationship between Si-implantation dose, TixSiyNz structure and reverse leakage current of Cu/TixSiyNz/Si diodes will be discussed, along with implications as to the suitability of these structures in Cu metallization.

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