4H-SiC功率MESFET直流I-V特性解析模型

提出了一种改进的4H-SiC MESFET大信号直流解析模型。该模型基于栅极下面电荷的二维分布进行分析,在考虑电场相关迁移率、速度饱和及沟道内电荷堆积的基础上,计入沟道长度调制效应,建立基于物理的沟道长度调制效应模型。计算结果表明,计入沟道长度调制效应后的直流模型在饱和区与实测的I-V特性较为吻合。     

4H-SiC MESFET直流Ⅰ-Ⅴ特性解析模型

提出了一种改进的4H-SiC MESFET非线性直流解析模型,基于栅下电荷的二维分布,对该模型进行了分析,采用多参数迁移率模型描述速场关系.在分析了电流速度饱和的基础上,考虑沟道长度调制效应对饱和区漏电流的影响,建立了基于物理的沟道长度调制效应模型,模拟结果符合高场下漏极的MC(蒙特卡罗)计算的结果.与以前的研究模型相比较,结果说明了该研究的有效性,饱和电流的结果与实测的Ⅰ-Ⅴ特性更加吻合.     

4H-SiC MESFET直流I-V特性解析模型

提出了一种改进的4H-SiC MESFET非线性直流解析模型,基于栅下电荷的二维分布,对该模型进行了分析,采用多参数迁移率模型描述速场关系.在分析了电流速度饱和的基础上,考虑沟道长度调制效应对饱和区漏电流的影响,建立了基于物理的沟道长度调制效应模型,模拟结果符合高场下漏极的MC(蒙特卡罗)计算的结果.与以前的研究模型相比较,结果说明了该研究的有效性,饱和电流的结果与实测的Ⅰ-Ⅴ特性更加吻合.     

适于器件及电路分析的全耗尽短沟道LDD／LDSSOI MOSFET器件模型

本文系统描述了全耗尽短沟道ＬＤＤ／ＬＤＳＳＯＩＭＯＳＦＥＴ器件模型的电压电压特性。该模型扩展了我们原有的薄膜全耗尽ＳＯＩＭＯＳＦＥＴ模型，文中着重分析了器件进入饱和区后出现的沟道长度调制效应，及由于ＬＤＤ／ＬＤＳ区的存在对本征ＭＯＳ器件电流特性的影响。     

扩散杂质分布对VMOS和DMOS器件的直流特性的影响

为了研究杂质分布对器件性能的影响,同时制作了双扩散MOS(DMOS)和V形槽MOS(VMOS)晶体管。为了获得沟道的长度和峰值沟道掺杂浓度,变换了工艺参数。用两探针扩展电阻法测量杂质分布。DMOS器件横向杂质分布的性质是根据VMOS和DMOS器件的电性能的比较而推断的。业已发现,通常的一些模型不能恰当地模拟。饱和时的器件的输出电导由沟道-漏结周围区域的一维泊松方程的解推导出沟通长度调制的表示式。当将测量的杂质分布数据引入新的沟道长度调制模型时,在沟道长度从0.6微米到2微米范围内,器件的输出电导能够精确地模拟出。     

深亚微米薄膜全耗尽SOI MOSFET的强反型电流模型

本文在分析ＦＤＳＯＩＭＯＳＦＥＴ特殊物理结构的基础上提出了一个新的适用于深亚微米器件的强反型电流物理模型．模型包括了大部分的小尺寸器件效应如迁移率下降、沟道调制、载流子速度饱和、漏致电导增强（ＤＩＣＥ）和串联Ｓ／Ｄ电阻等．该模型最大的优越性在于线性区和饱和区电流可以用同一个简单的表达式描述，确保了电流及其高阶导数在饱和点连续．将模型模拟计算结果与实验结果进行了对比，当器件的沟道长度下降到深亚微米区域时，二者吻合得仍然很好     

深亚微米薄膜全耗尽SOI MOSFET的强反型电流模型

本文在分析ＦＤＳＯＩＭＯＳＦＥＴ特殊物理结构的基础上提出了一个新的适用于深亚微米器件的强反型电流物理模型．模型包括了大部分的小尺寸器件效应如迁移率下降、沟道调制、载流子速度饱和、漏致电导增强（ＤＩＣＥ）和串联Ｓ／Ｄ电阻等．该模型最大的优越性在于线性区和饱和区电流可以用同一个简单的表达式描述，确保了电流及其高阶导数在饱和点连续．将模型模拟计算结果与实验结果进行了对比，当器件的沟道长度下降到深亚微米区域时，二者吻合得仍然很好     

HEMT器件小信号模型研究

提出一种AlGaAs/GaAs HEMT器件沟道电荷新模型,该模型用一个通用解析函数中系数的不同值来描述二维电子气(2DEG)和AlGaAs层中的电子浓度。在小信号特性上,除考虑了2DEG层外,又在考虑了AlGaAs层、速度饱和、饱和区沟道长度调制效应和源、漏串联电阻RS和RD等效应的基础上,推导出直流特性、跨导、输出电导和栅电容的解析表达式。仿真说明,在较大的栅、漏压范围内,该模型的理论值与实验结果符合良好。     

具有短沟道的结栅场效应晶体管的特性

本文推导出具有短沟道长度的结栅场效应晶体管的两段模型。在此模型中,导电沟道分为源段和漏段。在源段假设包含有热电子效应修正项的渐变沟道近似。对于漏段,用公式阐述了和过剩载流子堆积效应有关的饱和速度传输。给出了归一化设计曲线和两个样品器件的特性。     

不同沟道长度MOSFET的热载流子效应

对同一工艺制作的几种不同沟道长度的 MOSFET进行了沟道热载流子注入实验。研究了短沟 MOS器件的热载流子效应与沟道长度之间的关系。实验结果表明 ,沟道热载流子注入使 MOSFET的器件特性发生退变 ,退变的程度与器件的沟道长度之间有非常密切的关系。沟道长度越短器件的热载流子效应越明显 ,沟道长度较长的器件的热载流子效应很小。利用热载流子效应产生的机理分析和解释了这一现象     

An analytical CMOS inverter delay model including channel-lengthmodulations

An analytical delay model of a CMOS inverter that includes channel-length modulation and source-drain resistance as well as high-field effects is introduced. This model is based on the improved short-channel MOSFET model derived from a quasi-two-dimensional analysis of operation in the saturation region. Calculations of the rise, fall, and delay times show good agreement with SPICE MOS level three simulations     

A physically based C∞-continuous model forsmall-geometry MOSFET's

An explicit single-piece MOSFET model is derived from a surface potential formulation. The model covers small-geometry effects, like mobility reduction, channel-length modulation, carrier velocity saturation, and short- and narrow-channel effects. Good agreement has been found with measured characteristics. Furthermore, the DC current calculated using the new model shows smooth transitions through all regions of operation. Therefore the convergence when employed in circuit simulation will be improved     

A simple analytical model for hot-carrier MOSFETs

Several second-order effects such as mobility degradation, carrier velocity saturation, and channel-length modulation are included in the model. The source-drain series resistances are accounted for, and a simple formula to calculate the output conductance without creating a discontinuity at the transition from the linear to the saturation region is proposed. The accuracy of the model is confirmed by comparing its theoretical predictions with the experimental data available in the literature. The model is used to estimate the lateral electric field at the drain to which hot-carrier effects are sensitive     

低温NMOSFET的解析模型

利用缓变沟道近似（ＧＣＡ）及准二维分析，提出了在７７～２９５Ｋ温区工作的ＮＭＯＳＦＥＴ的解析模型。建模中不仅考虑迁移率蜕变（电场引起）、载流子速度饱和及沟道调制效应，而且计入温度相关参数的温度特性。模拟结果显示了该模型的正确性及其在低温热载流子效应中的应用潜力。     

A parametric short-channel MOS transistor model for subthreshold and strong inversion current

The authors present a parametric model which covers the subthreshold and strong inversion regions with a continuous transition between these regions. The effects included in the model are mobility reduction, carrier velocity saturation, body effect, source-drain resistance, drain-induced barrier lowering, and channel-length modulation. The model simulates accurately the current characteristics as well as the transconductance and output conductance characteristics which are important for analog circuit simulation.     

A charge-based model for short-channel MOS transistor capacitances

A model that conserves charge, is valid in the strong inversion regime, and is based on the quasi-static approximation is presented. Major second-order effects such as carrier velocity saturation, mobility degradation, and channel-length modulation are included in the derivation of current and charges. The theoretical predictions of the model are compared to both experimental and numerically simulated data and are found to be in good agreement over a wide range of gate and drain voltages and to confirm many properties that have been observed or predicted     

Short-channel effects in SOI MOSFETs

Short-channel effects in thin-film silicon-on-insulator (SOI) MOSFETs are shown to be unique because of dependences on film thickness and body and back-gate (substrate) biases. These dependences enable control of threshold-voltage reduction, channel-charge enhancement due to a drain bias, carrier velocity saturation, channel-length modulation and its effect on output conductance, as well as device degradation due to hot carriers in short-channel SOI MOSFETs. A short-channel effect exclusive to SOI MOSFETs, back-surface charge modulation, is described. Because of the short-channel effects, the use of SOI MOSFETs in VLSI circuits provides the designer with additional flexibility as compared to bulk-MOSFET design. Various design tradeoffs are discussed