薄膜全耗尽SOI CMOS电路高温特性模拟和结构优化

在300～600K温度范围内,利用ISE TCAD模拟软件对全耗尽SOI电路的温度特性进行了模拟分析,得到了较全面的SOI CMOS倒相器静态特性和瞬态特性,并提出了一种改进的AlN-DSOI结构.结果显示,SOI CMOS电路的阈值电压对温度较为敏感,随着温度的升高,输出特性衰退明显.瞬态模拟也表明电路的速度和功耗受外界环境温度的影响较大.改进后的AlN-DSOI结构在有效缓解SOI结构热效应和浮体效应的基础上,显著提高了电路的速度和驱动能力.     

宽温区高温体硅CMOS倒相器的优化设计

在对体硅 CMOS倒相器直流特性、瞬态特性的高温模型和高温特性深入研究的基础上 ,提出了高温体硅 CMOS倒相器结构参数设计的考虑 ,给出了宽温区 (2 7～ 2 5 0℃ )体硅 CMOS倒相器优化设计的结果。模拟验证表明 ,所设计的体硅 CMOS倒相器在宽温区能满足下列电学参数设计指标 :输出高电平 Vo H>4 .95 V,输出低电平 Vo L<0 .0 5 V,转换电平 V*i (2 7℃ ) =2 .5 V,V*i(2 5 0℃ ) =2 .4 V,上升时间 tr(2 7℃ ) <110 ns,tr(2 5 0℃ ) <180 ns,下降时间 tf(2 7℃ ) <110 ns,tf(2 5 0℃ ) <16 0 ns。     

薄膜全耗尽积累型SOI MOS 器件在( 27～300℃) 宽温区高温特性的研究

本文在对p^ pp^ 结构薄膜全耗尽积累型SOA MOS器件导电机理和基本特性研究的基础上，进一步研究了实验样品在（27－300℃）宽温区高温特性，理论和实验研究结果表明p^ pp^ 结构薄膜全耗尽积累型SOI MOS器件实验样品在（27－300℃）宽温区具有良好的高温特性。     

薄膜全耗尽SOI CMOS电路高温特性模拟和结构优化

在300～600K温度范围内,利用ISE TCAD模拟软件对全耗尽SOI电路的温度特性进行了模拟分析,得到了较全面的SOI CMOS倒相器静态特性和瞬态特性,并提出了一种改进的AlN-DSOI结构.结果显示,SOI CMOS电路的阈值电压对温度较为敏感,随着温度的升高,输出特性衰退明显.瞬态模拟也表明电路的速度和功耗受外界环境温度的影响较大.改进后的AlN-DSOI结构在有效缓解SOI结构热效应和浮体效应的基础上,显著提高了电路的速度和驱动能力.     

CMOS数字集成电路的高温电学性能分析

本文给出了ＣＭＯＳ倒相器的高温等效电路，分析了它的高温直流传输特性和瞬态特性，文章还讨论了ＣＭＯＳ静态数字集成电路高温电学特性的分析方法。本文提出了的ＣＭＯＳ数字集成电路的高温学特性模型和实验结果相接近。     

高温SOICMOS倒相器MOSFET组合的研究

在讨论薄膜 SOIMOSFET高温性能和高温应用优越性的基础上 ,以高温应用为目标 ,对适用于高温 SOICMOS倒相器的三种 MOSFET组合结构进行了比较分析 ,最终确定了高温 SOICMOS倒相器的 MOSFET组合结构的选取原则。     

HEMT DCFL倒相器的模拟分析

本文对HEMT DCFL倒相器直流传输特性及瞬态特性进行了模拟分析.在HEMT单管特性分析中,利用了K.Park的I-V特性分析模型,通过对E/D倒相器的驱动管与负载管工作区域的划分,讨论了电压传输过程中三个不同的工作区;模拟瞬态特性时,分别考虑了电流充放电过程中驱动管和负载管的不同工作状态,较为正确地算出了延迟时间;模拟结果与实验及理论分析吻合.     

基于速度饱和的CMOS倒相器延迟模型

提出了一个新的小尺寸CMOS倒相器延迟模型,它考虑了速度饱和效应以及非阶梯的输入信号对延迟的影响并给出了倒相器快输入响应与慢输入响应的判据,模型计算结果与SPICEBSIM1模型的模拟结果吻合得很好.     

高温CMOS数字集成电路的瞬态特性分析

本文分析了高温CMOS倒相器和门电路的瞬态特性,建立了它们的上升时间,下降时间和延迟时间的计算公式。根据本文分析的结果,高温CMOS倒相器和门电路瞬态特性变差的原因是由于MOST阈值电压和载流子迁移率降低,以及MOST漏端pn结反向泄漏电流增大的缘故。本文给出的计算结果能较好地解释实验现象。     

基于速度饱和的CMOS倒相器延迟模型

提出了一个新的小尺寸CMOS倒相器延迟模型,它考虑了速度饱和效应以及非阶梯的输入信号对延迟的影响并给出了倒相器快输入响应与慢输入响应的判据,模型计算结果与SPICEBSIM1模型的模拟结果吻合得很好.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.