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Temperature- and voltage-dependent trap generation model in high-k metal gate MOS device with percolation simulation |
Hao Xu(徐昊), Hong Yang(杨红), Yan-Rong Wang(王艳蓉), Wen-Wu Wang(王文武), Wei-Chun Luo(罗维春), Lu-Wei Qi(祁路伟), Jun-Feng Li(李俊峰), Chao Zhao(赵超), Da-Peng Chen(陈大鹏), Tian-Chun Ye(叶甜春) |
Key Laboratory of Microelectronics Devices & Integrated Technology, Institute of MicroElectronics, Chinese Academy of Sciences, Beijing 100029, China |
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Abstract High-k metal gate stacks are being used to suppress the gate leakage due to tunneling for sub-45 nm technology nodes. The reliability of thin dielectric films becomes a limitation to device manufacturing, especially to the breakdown characteristic. In this work, a breakdown simulator based on a percolation model and the kinetic Monte Carlo method is set up, and the intrinsic relation between time to breakdown and trap generation rate R is studied by TDDB simulation. It is found that all degradation factors, such as trap generation rate time exponent m, Weibull slope β and percolation factor s, each could be expressed as a function of trap density time exponent α. Based on the percolation relation and power law lifetime projection, a temperature related trap generation model is proposed. The validity of this model is confirmed by comparing with experiment results. For other device and material conditions, the percolation relation provides a new way to study the relationship between trap generation and lifetime projection.
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Received: 07 March 2016
Revised: 30 March 2016
Accepted manuscript online:
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PACS:
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73.40.Qv
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(Metal-insulator-semiconductor structures (including semiconductor-to-insulator))
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73.43.Cd
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(Theory and modeling)
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77.22.Jp
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(Dielectric breakdown and space-charge effects)
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Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. SS2015AA010601), the National Natural Science Foundation of China (Grant Nos. 61176091 and 61306129), and the Opening Project of Key Laboratory of Microelectronics Devices & Integrated Technology, Institute of MicroElectronics of Chinese Academy of Sciences. |
Corresponding Authors:
Wen-Wu Wang
E-mail: wangwenwu@ime.ac.cn
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Cite this article:
Hao Xu(徐昊), Hong Yang(杨红), Yan-Rong Wang(王艳蓉), Wen-Wu Wang(王文武), Wei-Chun Luo(罗维春), Lu-Wei Qi(祁路伟), Jun-Feng Li(李俊峰), Chao Zhao(赵超), Da-Peng Chen(陈大鹏), Tian-Chun Ye(叶甜春) Temperature- and voltage-dependent trap generation model in high-k metal gate MOS device with percolation simulation 2016 Chin. Phys. B 25 087306
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