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单轴应变SiNMOSFET源漏电流特性模型

吕懿 张鹤鸣 胡辉勇 杨晋勇 殷树娟 周春宇

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单轴应变SiNMOSFET源漏电流特性模型

吕懿, 张鹤鸣, 胡辉勇, 杨晋勇, 殷树娟, 周春宇

A Model of channel current for uniaxially strained Si NMOSFET

Lü Yi, Zhang He-Ming, Hu Hui-Yong, Yang Jin-Yong, Yin Shu-Juan, Zhou Chun-Yu
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  • 本文在建立单轴应变Si NMOSFET迁移率模型和阈值电压模型的基础上, 基于器件不同的工作区域, 从基本的漂移扩散方程出发, 分别建立了单轴应变Si NMOSFET源漏电流模型. 其中将应力的影响显式地体现在迁移率和阈值电压模型中, 使得所建立的模型能直观地反映出源漏电流特性与应力强度的关系. 并且对于亚阈区电流模型, 基于亚阈区反型电荷, 而不是采用常用的有效沟道厚度近似的概念, 从而提高了模型的精度. 同时将所建模型的仿真结果与实验结果进行了比较, 验证了模型的可行性. 该模型已经被嵌入进电路仿真器中, 实现了对单轴应变Si MOSFET 器件和电路的模拟仿真.
    The channel current model is used to analyse the behavior of uniaxially strained Si NMOSFET device and circuit. With the development of mobility and threshold voltage model, starting from the basic drift-diffusion equation, the channel current model for an uniaxially strained Si NMOSFET device is developed under different bias conditions. Especially, the stress intensity is explicitly included in the mobility and threshold voltage model, and this makes the model convenient to directly reflect the relationship between the device channel current and the stress intensity. Moreover, in terms of the subthreshold current model, the charge of weak inversion rather than the normal effective channel thickness approximation is involved. In this way, the model accuracy can be improved. Furthermore, this model is implemented by using verilogA language and is applied to the strained Si circuit's SPICE simulation, the model parameters extraction tool ParamPlus++ is developed at the same time. As a result, the simulation of uniaxial-strained Si NMOSFET device and circuit can be achieved; the simulation data fits the experimental results or TCAD simulation results very well, and this proves the accuracy of the model. Meanwhile the simulation results of the threshold voltage and subthreshold current with respect to stress intensity are obtained and analyzed. The results show that with increasing stress intensity the subthreshold current is increased while the threshold voltage is decreased.
      通信作者: 胡辉勇, 35691513@qq.com
    • 基金项目: 教育部博士点基金(批准号: JY0300122503)和中央高校基本业务费(批准号: K5051225014, K5051225004)资助的课题.
      Corresponding author: Hu Hui-Yong, 35691513@qq.com
    • Funds: Project supported by the Research Fund for the Doctoral Program of Higher Education of China (Grant No. JY0300122503), and the Fundamental Research Funds for the Central Universities of China (Grant Nos. K5051225014, K5051225004).
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    Kumar M, Dubey S, Tiwari P K, Jit S 2013 Superlattices and Microstructures 58 10

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  • [1]

    Song J J, Yang C, Wang G Y, Zhou C Y, Wang B, Hu H Y, Zhang H M 2012 Jpn. J. Appl. Phys. 51 104301

    [2]

    Lv Y, Zhang H M, Hu H Y, Yang J Y 2014 Acta Phys. Sin. 63 197103(in Chinese) [吕懿, 张鹤鸣, 胡辉勇, 杨晋勇 2014 物理学报 63 197103]

    [3]

    Nicoleta W, Harald R, Mahadi-ul H 2011 Solid-State Electronics 57 60

    [4]

    Toshifumi I, Toshinori N, Tsutomu T 2008 IEEE Transactions on Electron Devices 55 649

    [5]

    David C, Gilmer, Jamie K 2010 IEEE Transactions on Electron Devices 57 898

    [6]

    Wang X Y, Zhang H M, Song J J, Ma J L, Wang G Y, An J H 2011 Acta Phys. Sin. 60 077205(in Chinese) [王晓艳, 张鹤鸣, 宋建军, 马建立, 王冠宇, 安久华 2011 物理学报 60 077205]

    [7]

    Valinajad H, Hosseini R, Akbari M E 2012 IJRRAS 13 2

    [8]

    Hung M F, Wu Y C, Tang Z Y 2011 Applied Physics Letters 98 162108

    [9]

    Lim J S, Thompson S E, Fossum J G 2004 IEEE Electron Device Letters 250 731

    [10]

    Roldn J B, Gmiz F, P Cartujo C P 2003 IEEE Tran Electron Devices 50 1408

    [11]

    Wang B, Zhang H M, Hu H Y, Zhang Y M, Zhou C Y, Wang G Y, Li Y C 2013 Chin. Phys. B 22 028503

    [12]

    Kang T K 2012 IEEE Electron Devices Letters 33 770

    [13]

    Kumar M, Dubey S, Tiwari P K, Jit S 2013 Superlattices and Microstructures 58 10

    [14]

    Chen D Y, Tang T G, Araujo C 1989 Chinese Journal of Semiconductors 10 547 (in Chinese) [陈登元, 汤庭鳌, C. A. Paz de Araujo 1989 半导体学报 10 547]

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出版历程
  • 收稿日期:  2015-04-20
  • 修回日期:  2015-06-02
  • 刊出日期:  2015-10-05

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