Characterization of Electrically Active Interfacial Defects in High-k Gate Dielectrics

2019 ◽  
Vol 11 (4) ◽  
pp. 393-406 ◽  
Author(s):  
Eric Vogel ◽  
Arif M. Sonnet ◽  
Chris L. Hinkle
1999 ◽  
Vol 567 ◽  
Author(s):  
M.C. Gilmer ◽  
T-Y Luo ◽  
H.R. Huff ◽  
M.D. Jackson ◽  
S. Kim ◽  
...  

ABSTRACTA design-of-experiments methodology was implemented to assess the commercial equipment viability to fabricate the high-K dielectrics Ta2O5, TiO2 and BST (70/30 and 50/50 compositions) for use as gate dielectrics. The high-K dielectrics were annealed in 100% or 10% O2 for different times and temperatures in conjunction with a previously prepared NH3 nitrided or 14N implanted silicon surface. Five metal electrode configurations—Ta, TaN, W, WN and TiN—were concurrently examined. Three additional silicon surface configurations were explored in conjunction with a more in-depth set of time and temperature anneals for Ta2O5. Electrical characterization of capacitors fabricated with the above high-K gate dielectrics, as well as SIMS and TEM analysis, indicate that the post high-K deposition annealing temperature was the most significant variable impacting the leakage current density, although there was minimal influence on the capacitance. Further studies are required, however, to clarify the physical mechanisms underlying the electrical data presented.


2001 ◽  
Vol 670 ◽  
Author(s):  
Ran Liu ◽  
Stefan Zollner ◽  
Peter Fejes ◽  
Rich Gregory ◽  
Shifeng Lu ◽  
...  

ABSTRACTRapid shrinking in device dimensions calls for replacement of SiO2 by new gate insulators in future generations of MOSFETs. Among many desirable properties, potential candidates must have a higher dielectric constant, low leakage current, and thermal stability against reaction or diffusion to ensure sharp interfaces with both the substrate Si and the gate metal (or poly-Si). Extensive characterization of such materials in thin-film form is crucial not only for selection of the alternative gate dielectrics and processes, but also for development of appropriate metrology of the high-k films on Si. This paper will report recent results on structural and compositional properties of thin film SrTiO3 and transition metal oxides (ZrO2and HfO2).


2010 ◽  
Vol 518 (9) ◽  
pp. 2505-2508
Author(s):  
Kana Hirayama ◽  
Wataru Kira ◽  
Keisuke Yoshino ◽  
Haigui Yang ◽  
Dong Wang ◽  
...  

2014 ◽  
Vol 778-780 ◽  
pp. 549-552 ◽  
Author(s):  
Jing Hua Xia ◽  
David M. Martin ◽  
Sethu Saveda Suvanam ◽  
Carl Mikael Zetterling ◽  
Mikael Östling

LaxHfyO nanolaminated thin film deposited using atomic layer deposition process has been studied as a high-K gate dielectric in 4H-SiC MOS capacitors. The electrical and nano-laminated film characteristics were studied with increasing post deposition annealing (PDA) in N2O ambient. The result shows that high quality LaxHfyO nano-laminated thin films with good interface and bulk qualities are fabricated using high PDA temperature.


2010 ◽  
Vol 7 (2) ◽  
pp. 316-320 ◽  
Author(s):  
D. Müller-Sajak ◽  
A. Cosceev ◽  
C. Brand ◽  
K. R. Hofmann ◽  
H. Pfnür

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