半导体放电管多元胞结构模型

在半导体放电管的版面设计上提出了多元胞结构版图.对多元胞结构“短路模型”进行了理论分析和实验验证,结果表明合理设计多元胞版图尺寸和P基区薄层电阻可以改善器件的转折导通特性和提高器件的抗雷电浪涌能力,从而为简化半导体放电管生产工艺提供了依据.     

分布式多元胞集成半导体放电管的设计与工艺

介绍了一种分布式多元胞集成半导体放电管的结构设计和工艺方法。在保持传统单元胞放电管器件表面总面积和放电管纵向剖面NPNPN五层结构不变的情况下,将放电管发射区等分成2(N+1)2个(N取0,1,2,3,4),构成在基区中心对称的多元胞结构。该结构优化了放电管阴极发射区的分布,使浪涌电流在整个芯片平面上趋于均匀,降低了发射区的热量集中效应;同时增加了电流放大系数,减少了放电管的开通时间。采用镓扩散、玻璃钝化等工艺流程,制作出分布式多元胞集成半导体放电管,解决了单元胞放电管散热不均匀、响应速度慢及可靠性差的问题。雷电波冲击电流测试表明,该结构提高了器件的抗电涌能力,可广泛应用于通信领域的雷电防护。     

提高半导体放电管抗浪涌能力的研究

半导体放电管是新一代抗浪涌保护器件，抗浪涌能力是其最重要的特性参数之一。文中分析了浪涌条件下器件失效的高温物理机制，讨论了器件功耗与传热对抗浪涌能力的影响，指出采用多元胞结构可降低由热量集中造成的最高结温，从而提高了器件的抗浪涌能力。     

半导体放电管

分析了造成电压瞬变和浪涌的原因，介绍了相应的防护办法，叙述了新型过压保护器件－半导体放电管的结构、特点，应用以及与其它传统的保护器件（TVS二级管、半导体放电管）的区别。     

用半导体放电管保护通信设备

用半导体放电管保护通信设备彭延凤,郑小鹿半导体放电管是在最近五、六年中发展起来的新型过电压保护器,它是基于可控硅原理和结构的一种二端负阻器件,用于保护敏感易损的集成电路,使之免遭雷电和突波的冲击。本文以美国Ｔｅｃｃｏｒ电子公司的半导体放电管ＩＳＤＡＣ...     

新型半导体防雷放电管

新型半导体防雷放电管黄尚贤双向二端子闸流管式新型半导体防雷放电管（以下简称半导体放电管）是取代现有气体放电管保护电话交换机和用户终端设备抗雷涌的理想器件。这种半导体放电管既适用于普通电话的３００ＨＺ～３４００ＨＺ模拟传输，也适用于ＩＳＤＮ的２Ｂ＋Ｄ（...     

半导体放电管

介绍了用于通信保安单元中的新一代过压保护器件——半导体放电管，简述了它的特点、工作原理、结构及应用。     

多元胞半导体电涌吸收器件的研究

设计并试制了一种多元胞结构的半导体电涌吸收器件（ＳＳＡＤ），旨在降低器件工作时的最高温度并提高其过浪涌能力。初步实验结果证明器件经历过电涌后，其失效率比单元胞有较显著的降低。     

半导体放电管定量自动注胶装置设计

半导体放电管是一种瞬态过压保护器件,广泛应用于通讯、铁路等行业。为了提高半导体放电管注胶工艺的自动化水平,给出了一种半导体放电管定量自动注胶装置的设计。该装置能够按需调节供胶量,供胶过程中能够自动去除绝缘胶中所混有的气泡,并具有注胶装置自动清洗的特点。该装置的设计解决了半导体放电管涂胶工艺中的关键性技术难题,实现了不同规格放电管的定量自动注胶。     

半导体放电管

介绍了用于通信保安单元中的新一代过压保护器件－半导体放电管，简述了它的特点，工作原理，结构及应用。     

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.     

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.     

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.     

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.     

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     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.