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La2O3/In0.53Ga0.47As metal-oxide-semiconductor capacitor with low interface state density using TiN/W gate electrode
被引:21
|作者:
Zadeh, D. H.
[1
]
Oomine, H.
[1
]
Suzuki, Y.
[1
]
Kakushima, K.
[2
]
Ahmet, P.
[1
]
Nohira, H.
[1
]
Kataoka, Y.
[3
]
Nishiyama, A.
[2
]
Sugii, N.
[2
]
Tsutsui, K.
[2
]
Natori, K.
[1
]
Hattori, T.
[1
]
Iwai, H.
[1
]
机构:
[1] Tokyo Inst Technol, Frontier Res Ctr, Yokohama, Kanagawa 2268502, Japan
[2] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Yokohama, Kanagawa 2268502, Japan
[3] Tokyo City Univ, Dept Elect & Elect Engn, Tokyo, Japan
基金:
日本学术振兴会;
关键词:
La2O3;
High-k/InGaAs;
Capacitor;
Metal gate;
Interface reaction;
Interface state density;
LAYER;
D O I:
10.1016/j.sse.2013.01.013
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
Effect of W and TiN/W gate metal on the interface quality of La2O3/InGaAs metal-oxide-semiconductor (MOS) interface is investigated. Hard X-ray photoelectron spectroscopy revealed that gate metal greatly affects the oxidation states at La2O3/InGaAs interface after post-metallization annealing (PMA). Results demonstrate that TiN/W gate metal can effectively control the reaction at La2O3/InGaAs interface and also suppress the formation of As, Ga, and In oxides. As a result, superior capacitance-voltage (C-V) characteristics with low interface state density (D-it) of 4.6 x 10(11) cm(-2)/eV (similar to 0.1 eV from midgap) and leakage current below 10(-5) A/cm(2) was obtained for TiN/W/La2O3 (10 nm)/InGaAs MOS capacitors. The MOS structure integrity was preserved for annealing temperature up to 620 degrees C. (C) 2013 Elsevier Ltd. All rights reserved.
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页码:29 / 33
页数:5
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