基于电磁微电机的密码锁控制系统研制

文章介绍了一种基于微电子机械系统技术制作的电磁微电机的密码锁控制系统。系统以AVR单片机为核心,驱动两个直径为6.9mm的电磁微电机,通过连接的键盘输入密码后,单片机驱动微电机解锁。     

三种弯曲旋转超声电机的原理及研究

介绍了三种不同结构的弯曲振动模态超声微电机。详细讨论了它们共同的驱动原理，分别介绍了压电片夹心式和压电管式电机的结构特点及性能测试。在此基础上，研制了一种更易实现微型化的压电柱式超声微电机，并介绍了它的极化原理及结构。文章对弯曲振动模态超声电机的设计具有指导意义，对其深入研究具有参考价值。     

基于微机械工艺的平面微电机的研究

为提高微电机的输出力矩，增加微电机散热能力和电流密度，提高电机工作效率，设计了一种具有双转子结构的平面微电机。两个转子对称分布于定子两侧。转子采用永磁体进行轴向充磁。定子为平面线圈，是采用硅微机械加工技术和LIGA工艺制作的。线圈之间则采用了三相星形连接方式，线圈结构为平面型、无槽、集中绕组。把制作好的定子和转子装配后通以三相方波电流进行驱动，通过对其输出力矩和转速的测试证明电机运转良好。     

微电机用联轴器的改进设计及分析

在小功率齿轮传动装置的设计中，微电机用的联轴器是一个重要部件。在以往设计、使用的联轴器的基础上，本文介绍了微电机用联轴器的特点及要求，给出了几种常用类型的联轴器，并介绍了对弹性十字盘联轴器的改进设计，最后对一些主要问题进行了深入的分析。     

基于低电压驱动MEMS的可调光衰减器的设计与性能分析

研制了一种低成本、小体积的静电驱动微电机系统（MEMS）可调光衰减器（VOA）。该器件采用了静电驱动微反射镜和光纤光准直器，它具有良好的光学性能，克服了传统VOA的缺点。它的驱动电压范围是0～8V，工作范围是0～25dB。给出了器件的衰减量和驱动电压的关系、光学性能的分析和试验结果。     

基于CPLD的红外焦平面阵列驱动电路设计与实现

给出了一种384×288非致冷红外焦平面阵列(UFPA)驱动电路的设计方法.在分析红外焦平面阵列工作原理的基础上,设计了红外焦平面阵列的驱动电压和时序电路,并对驱动时序信号进行了仿真和验证.实验结果表明,该驱动电路能够正确驱动出红外视频信号,可以满足实际红外热成像系统的工作需求.     

基于FPGA的线阵CCD驱动模块的实现

CCD应用的关键问题之一就是驱动电路的设计。以TCD1209D为例,设计并实现了一种CCD驱动模块。通过对TCD1209D芯片的时序分析,在ISE12.4开发平台上,运用Verilog HDL语言设计了TCD1209D的驱动逻辑电路,并构建了TCD1209D驱动模块的硬件电路。最后将设计的逻辑电路下载到XILINX公司的XC3S500E芯片上进行验证与实现。测试结果表明驱动电路能驱动TCD1209D正确工作并输出模拟图像信号。     

一种新型LD驱动电源的设计

本文详细介绍了半导体激光器驱动电源的工作原理,分别对基于晶体管、场效应管和专用芯片的驱动电源进行分析,对三种驱动电源进行了比较,并设计了一种基于DC/DC转换芯片的可调式激光器驱动电源,该电源输出恒流范围为0-4A,工作性能可靠、稳定,具有较大的应用价值.     

基于FPGA的线阵型CCD驱动电路设计

CCD驱动电路的设计是实现CCD各种设计功能的关键性因素,只有对其驱动信号设计的严格把关,才会进一步保证CCD器件后续工作的开展。分析线阵CCD器件TCD1703C的驱动时序要求,采用QuartusⅡ软件,选用Verilog HDL语言设计了各路驱动时序信号。将程序设计下载到FPGA器件中,通过逻辑分析仪对输出信号进行了波形监测,验证了线阵CCD的驱动时序设计的可行性。将产生的驱动时序信号接入CCD器件,不同光照入射的条件下,CCD在驱动信号的驱动下,正常工作并输出了相应的视频信号。     

一种光开关集成可调衰减器的设计与应用

介绍了一种兼具光开关功能、低成本、小体积的静电驱动微电机系统(MEMS)可调光衰减器件.器件采用了静电驱动微反射镜和光纤三芯准直器,具有良好的光学性能和可靠性指标.给出了器件的衰减量和驱动电压的关系、光学性能的分析以及相关试验结果.对于该器件的灵活应用,介绍了一种PLC技术的,新型、实用、低成本的ROADM设计方案.     

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.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

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.     

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.