金属-半导体-金属光电探测器的瞬态特性分析

给出了金属—半导体—金属光电探测器(MSM—PD)高频特性的等效电路模型，在此模型基础上编写模拟分析程序，分析了探测器相关器件参数对器件截止频率的影响，为探测器与前置放大器的优化匹配提供了理论依据。     

南京电子器件研究所1989年度科研成果介绍之二

<正>1990年3月10日至12日南京电子器件研究所在南京召开了第33次科研成果鉴定会.对1989年度余下的18项科研成果进行了专家评议鉴定.其中半导体专业14项,光电专业8项.这次鉴定会展示了该所近年来在半导体及光电领域中取得的进展.现将半导体专业的部分鉴定项目介绍如下:     

表面电场整形高压RESURF LDMOST

提出了采用对ＬＤＭＯＳ漂移区表面进行分段离子注入，对表面电场进行了整形的一种新结构高压ＲＥＳＵＲＦＬＤＭＯＳＴ。利用二维数值模拟对这种器件结构的分析表明，这种新结构显著降低了表面电场峰值，降低了采用ＲＥＳＵＲＦ技术导致的耐压对工艺参数变化的敏感性，并在耐压不降低的情况下缩短器件漂移区长度，得到低的比导通电阻Ｒｏｎ．Ａ。     

MSM结构平面及掩埋叉指电极间电场的分布特性

提出了一种新型具有掩埋电极的金属-半导体-金属(MSM)探测器原型器件结构,并用数值计算的方法研究了其激活层内电场的分布特性,讨论了掩埋电极深度对电场分布的影响,并与传统平面叉指电极结构进行比较,得出该结构对器件性能改善具有重要的作用.     

GexSi1—x／Si红外探测器量子效率的理论计算

通过对ＧｅｘＳｉ１－ｘ／Ｓｉ红外探测器结构及机理的研究，建立了计算量子效率的模型，并计算了内量子效率与波长的关系，与他人的实验结果符合得很好。     

注入光器件工作原理的模拟与分析

通过数值求解双极半导体器件的基本方程,研究了载流子在注入光敏器件内部的运动,得到器件内部载流子的运动图像。在此基础上阐明了该种器件工作原理。     

光电耦合器的发展及应用

半导体光电耦合器现已发展成为一类特殊的半导体隔离器件。它体积小、寿命长、无触点、抗干扰、能隔离，并且有单向信号传输和容易连接等功能。文中介绍了光电耦合器的典型结构和特点以及国内外的发展现状，最后给出了半导休光电隔离耦合器件的多种应用电路实例。     

VMJ光电器件电极引线新法

本文分析了VMJ光电器件使用传统电极引线工艺所存在的问题,进而提出了一种非常简单的电极引线方法。     

国外SiGe器件及其应用

本文主要叙述SiGe器件的材料、制作工艺及其器件应用。     

Electric field sensors based on MEMS technology

The design and optimizatlon of two types of novel miniature vibrating Electric Field Sensors (EFSs) based on MicroElectroMechanical Systems (MEMS) technology are presented.They have different structures and vibrating modes. The volume is much smaller than other types of charge-induced EFSs such as field-mills. As miniaturizing, the induced signal is reduced enormously and a high sensitive circuit is needed to detect it. Elaborately designed electrodes can increase the amplitude of the output current, making the detecting circuit simplified and improving the signal-to-nolse ratio. Computer simulations for different structural parameters of the EFSs and vibrating methods have been carried out by Finite Element Method (FEM). It is proved that the new structures are realizable and the output signals are detectable.     

电弧炉控制系统设计

我国能源日趋紧缺,大功率冶炼工业电弧炉的安全运行与节能降耗是至关重要的。文章通过对软硬件的设计,并依据额定值方法,得到了二次侧电压自动换档以及电弧炉电极的智能控制系统。设计结果表明,通过采用相应的变压器档位开关、固态继电器、温度传感器、交流电量传感器可以很好地采集现场信号,实现系统与生产过程的连接,具有节能降耗并提高产量等显著优点,同时加强了信息管理能力,降低了工人的劳动强度,取得了显著的经济效益和社会效益。     

External Electric Field Oependence of Optical Absorbance in SnO2 Nanoclusters

The optical absorbance in near UV wavelength region in SnO2 nanoclusters in an external electric field is determined at room temperature.The absorbance spectra as appliced field and the absorbance variations with the applied field are obtained.The relation between absorbance change and applied field is non-linear.and is saturated at high field region.     

高压半导体器件电场的二维数值分析

利用作者们开发的有限元二维分析程序对高压半导体器件的电场分布进行了模拟分析.给出了这类器件中有离子注入、场板和栅极延伸等终端结构时的电场分布;根据模拟结果得出突变平面结表面电场的近似公式,将此公式与圆柱坐标对称解和计算机模拟结果进行了比较.     

蒙特卡洛法模拟半导体高场输运过程

讨论了用蒙特卡洛法模拟高电场下半导体内电子输运现象的基本过程。研究了 Ｚｎ Ｓ 中电子输运的性质,对电子数目对模拟结果的影响进行了分析。讨论了电子输运中的暂态过程,得出了稳态下的电子分布曲线     

1GHz以上微波暗室电场强度标准及误差分析

本文阐述了利用系列角锥喇叭建立１ＧＨｚ以上微波暗室标准电场强度的原理和方法。导出了角锥喇叭近场增益的简化公式。简述了２０８０天线测试系统及三天线法测量技术，且对测量误差进行了分析。理论和实验结果表明，建立标准电场强度的误差≤０．５ｄＢ。     

平面波导有效折射率数值解及光场分析

提出了一种计算有效折射率（ｎｅｆ）的数值迭代算法,并通过计算得出平面光波导的光场分布,并由此确定平面光波导的厚度。     

HBT中基区内建电场的物理机制及其理论分析

计算了具有线性Ｇｅ 分布的ＳｉＧｅ 基区价带有效态密度和空穴浓度的分布，分析了基区内建电场的物理机制，分别采用Ｂｏｌｔｚｍ ａｎｎ 统计和Ｆｅｒｍ ｉ Ｄｉｒａｃ统计给出了内建电场分布的表达式并进行了计算，最后讨论了基区重掺杂对电场的影响     

Multiscale Pattern Generation in Viscoelastic Polymer Films by Spatiotemporal Modulation of Electric Field and Control of Rheology

Electric‐field‐induced hierarchical, multiscale patterning of incompletely cross‐linked viscoelastic polydimethylsiloxane (PDMS) films is achieved by spatiotemporal variation of the field, which produces a multiplicity of complex mesopatterns from the same electrode. Experiments and simulations are employed to uncover pathways of hierarchical pattern formation. Spatial modulation of the field is introduced by employing different types of simply patterned electrodes: stripes, elevated concentric circular rings, and box‐patterned ridges. Multiscale complex structures consisting of increasingly finer primary, secondary, and tertiary hierarchical structures are fabricated by progressively ramping up the electric field while maintaining the integrity of the already formed structures. The latter is achieved by partially cross‐linking the films before patterning, which engenders optimal viscosity to prevent a rapid ripening and coalescence of earlier formed patterns. These multiscale structures can be controlled by the geometry and periodicity of patterned electrodes, the strength of the electric field, and its programmable temporal variation. The PDMS patterns are made permanent by complete cross‐linking after a desired multiscale structure is obtained.     

A microfabricated metal grating oscillator for electric field detection

This letter proposes a novel design of a Micro Electro Mechanical System （MEMS） device featuring a metal grating vibratory mierostructure driven by electrostatic force to sense the spatial electric field. Due to the advantages in slide-film damping and large vibration amplitude, such a device makes atmospheric packaging a low-cost option for practical manufacture. In this letter, we present the operating principles and specifications, the design structure, as well as the finite element simulation. Computational analysis shows that our design obtains good results in device parameters setting, while its simplicity and low-cost features make it an attractive solution for applications.