存储器测试仪新进展

随着ＤＤＲＳＤＲＡＭ、ＤＲＤＲＡＭ、ＳＬＤＲＡＭ及ＰＢＳＲＡＭ等超高速存储器相继问世，以及测试仪采用ＡＬＰＧ、ＤＤＲ模式等功能以适应高速测试的要求，今后必须采用依测试脚配置资源的结构，并设法解决进一步提高专用集成电路集成度的问题。超高速存储器Ｌ...     

高压RESURF LDMOST的开态电阻与关态电压

降低表面电场原理可大大提高ＬＤＭＯＳＴ的器件性能。本文详细研究了用ＲＥＳＵＲＦ原理设计的ＬＤＭＯＳＴ的开态电阻与击穿电压的理论分析模型，并根据这一模型对ＲＥＳＵＲＦ ＬＤＭＯＳＴ的优化设计深入的讨论。最后评价了高压ＲＥＳＵＲＦ ＬＤＭＯＳＴ在保持器件耐压不变时降低其开态电阻的几种方法。     

ADSL系统中的RS编译码

考虑到ＡＤＳＬ线路环境中突发干扰对系统性能的影响，可以采用ＲＳ编码改善系统性能。文中给出了实现，ＡＤＳＬ系统ＲＳ编译码的一种方法。     

首条ISDNVoDSL电话呼叫测试成功

作为世界领先的汇聚接入解决方案供应商 ,ＲＡＤ数据通信公司日前宣布该公司已成功地实现了在ＤＳＬ上运行ＩＳＤＮ的话音业务的功能。该项实验使用ＲＡＤ公司的ＬＡ— 140集成接入设备 (Ｉｎｔｅ ｇｒａｔｅｄＡｃｃｅｓｓＤｅｖｉｃｅ—ＩＡＤ)通过另一家大型通信设备制造商的ＤＳＬＡＭ设备与话音接入网关相连接。话音呼叫从ＩＳＤＮ电话发起 (ＢＲＩ) ,通过ＬＡ— 140转化成ＡＴＭ信元在ＳＤＳＬ上传送到ＤＳＬＡＭ ,并通过话音网关被交换到ＰＯＴＳ电话上。ＲＡＤ的ＬＡ— 140ＩＡＤ可以满足运营商们延长ＩＳＤＮ业务的寿命的愿望。Ｒ…     

ORACLE数据库性能优化

ＯＲＡＣＬＥＲＤＢＭＳ已在各行业得到了广泛的应用和关注。本文对ＯＲＡＣＬＥＲＤＢＭＳＶ６．０的运行机制进行了分析，并对数据库规范化设计、数据参数调整、ＳＱＬ优化等优化系统的方法进行了讨论。     

利用3D Studio MAX为VRML建立虚拟现实世界

利用３ＤＳｔｕｄｉｏＭＡＸＲ２强大的三维建模和输出功能，可以将三维场景转化为ＶＲＭＬ２．０文件格式输出，从而为建造虚拟现实世界提供了极大的方便。文章详细讨论了利用３ＤＳｔｕｄｉｏＭＡＸ为ＶＲＭＬ建模并以ＶＲＭＬ２．０文件格式输出的问题。     

业界风云

Ｐｈｉｌｉｐｓ推出Ｒ．Ｅ．Ａ．ＬＤＳＰ查询号：１６２Ｐｈｉｌｉｐｓ半导体近日宣布推出其Ｒ．Ｅ．Ａ．Ｌ．ＤＳＰ（可重置嵌入式ＤＳＰ结构低成本／低功耗）技术，可使设计者将先进数字信号处理（ＤＳＰ）功能集成到大批量消费产品中。Ｐｈｉｌｉｐｓ半导体的Ｒ．Ｅ．...     

CMOS电路芯片ESD保护电路设计技术的发展

本文简要地回顾了ＣＭＯＳ电路芯片上ＥＳＤ保护电路设计技术发展概况，给出了在中小规模、大规模及超大规模各阶段的ＣＭＯＳ电路芯片上ＥＳＤ保护电路的主流技术，双寄生的ＳＣＲ结构ＶＬＳＩ ＣＭＯＳ芯片上ＥＳＤ保护电路的最新设计技术，就其ＥＳＤ保护原理、设计技术及取得的成果做了较详细分析和探讨。对于研制高密度、高速度的ＶＬＳＩ ＣＭＯＳ电路。开展高ＥＳＤ失效阈值电压，小几何尺寸及低ＲＣ延迟时间常数保护电路的     

日本三菱、索尼公司加速建设ULSI研究楼

日本三菱、索尼公司加速建设ＵＬＳＩ研究楼为了加速２５６ＭＤＲＡＭ商品化，日本三菱、索尼公司加紧建设开发２５６ＭＤＲＡＭ的ＵＬＳＩ研究楼。日本三菱电机公司于１９９３年春在兵库县伊丹市的ＬＳＩ研究所内建世界第一流的ＵＬＳＩ研究楼，简称Ｕ搂。投资３００亿日...     

高压RESURF LDMOSFET的实现

利用ＲＥＳＵＲＦ技术，使用常规低压集成电路工艺，实现了适用于ＨＶＩＣ、耐压达１０００Ｖ的ＬＤＭＯＳＦＥＴ。本文介绍了该高压ＬＥＭＯＳＦＥＴ的设计方法、器件结构、制造工艺测试结果，此外，本文还从实验和分析的角度探讨了覆盖在漂移区上面的金属栅－金属栅场板长度ＬＦ对ＲＥＳＵＲＦ器件耐压的影响。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first