基于双材料悬臂梁结构的非制冷红外成像系统

报道了一种利用MEMS技术制备 ,基于双材料悬臂梁结构的非制冷红外焦平面阵列 (FPA)并配有可见光读出部分的红外成像系统 ,可以在 8～ 14 μm光谱区得到成像。基于该结构的非制冷红外成像系统利用的是光力学效应原理。我们采用MEMS表面硅工艺制备FPA ,深入研究了双材料悬臂梁结构成像系统的基本原理 ,工艺制备难点和响应结果     

基于双材料悬臂梁结构的非制冷红外成像系统

报道了一种利用MEMS技术制备,基于双材料悬臂梁结构的非制冷红外焦平面阵列(FPA)并配有可见光读出部分的红外成像系统,可以在8～14μm光谱区得到成像.基于该结构的非制冷红外成像系统利用的是光力学效应原理.我们采用MEMS表面硅工艺制备FPA,深入研究了双材料悬臂梁结构成像系统的基本原理,工艺制备难点和响应结果.     

基于双材料悬臂梁结构的非制冷红外成像系统

报道了一种利用MEMs技术制备，基于双材料悬臂梁结构的非制冷红外焦平面阵列(FPA)并配有可见光读出部分的红外成像系统，可以在8～14μm光谱区得到成像。基于该结构的非制冷红外成像系统利用的是光力学效应原理。我们采用MEMS表面硅工艺制备FPA，深入研究了双材料悬臂梁结构成像系统的基本原理，工艺制备难点和响应结果。     

光学读出红外成像及其FPA性能分析

针对已提出的光学读出非制冷红外成像系统,设计研制了一种单元尺寸分别是50 μm×50μm和60 μm×60 μm的新型双材料微悬臂梁红外焦平面阵列(FPA),进行了人体红外热成像实验,并对光学读出非制冷红外成像系统的温度-灰度响应曲线及噪声进行了测定.实验结果表明该微梁结构FPA构成的红外成像系统的噪声等效温度差(NETD)约100 mK.和课题组之前的研究结果(微梁单元尺寸120μm×120μm,NETD约300 mK)相比,红外图像的温度分辨率和空间分辨率都得到了明显改善.     

非制冷MEMS红外成像系统

利用光力学效应设计研制了非制冷MEMS红外焦平面阵列及图像探测系统,提出并制作了新型间隔镀金的、无Si衬底的非制冷MEMS红外成像焦平面阵列,分析了FPA热响应时间、NETD、像元的一致性等问题,与光学检测系统共同组成红外成像系统,成功得到了室温背景下人体的热像.     

热红外探测器的最新进展

对基于热敏电阻的微测辐射热计和基于热释电效应的热释电红外探测器在探测元材料、焦平面阵列(FPA)结构和读出电路(ROIC)3个方面进行了分析对比,讨论了这两种非制冷探测器热电材料的选取原则,FPA单元的热绝缘构造和读出电路的组成方式,并介绍了它们的最新进展和发展方向。     

双材料微梁阵列非制冷红外成像系统——微梁阵列的设计与制作

给出了一种用于非制冷光学读出红外探测器的核心器件--双材料微悬臂梁阵列的设计和制作.微梁阵列是无硅基底的SiNx/Au双材料单层膜结构,其制作工艺简单、可以直接放在空气中成像.实验使用了设计制作的140×98微梁阵列和高信噪比的12-bit CCD,得到120℃以上的物体热像,噪声等效温度差(NETD)为7K左右,实验结果与热机械模型预测结果一致.     

非制冷红外焦平面阵列的非均匀性校正及其实现

针对基于氧化钒(VOx)的非制冷红外焦平面阵列,介绍了非制冷红外成像系统的构成及其原理,并根据焦平面阵列及其读出电路的特点,给出了相应的非均匀性校正及其FPGA设计的实现。     

二极管原理非制冷红外焦平面阵列的集成设计

面向非制冷红外成像的低成本高性能应用,二极管原理的红外焦平面阵列的设计和工艺实现得到研究和发展.焦平面和读出电路的设计集成以及CMOS和MEMS工艺集成是此项技术的研究重点.基于SOI的二极管原理焦平面阵列在低成本的利用CMOS工艺实现大规模阵列集成方面有很大的优势.读出电路是基于标准CMOS工艺进行设计的.320×2...     

非制冷红外焦平面CMOS读出电路设计

在过去的10年里红外焦平面阵列成像技术逐渐进入了成熟期,从红外焦平面的发展背景出发,简要介绍了一种新颖的非制冷焦平面成像技术,论述了读出电路在红外焦平面信号传输中的作用并介绍了其基本框图,分析了国内外焦平面读出电路的现状,最后提出了一些在红外焦平面阵列读出电路设计中所需要注意的问题。     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks