照亮廿一世纪之光--纪念激光发明四十周年

没有科学大师的创新思维，就没有激光的发明。激光的发明，使电子学推进到光频电磁波段，产生了光频电子学，简称光电子学；激光的发明，同时也使传统光学推进到信息领域，形成了相干光学，或光子学。激光的进一步发展，将光信息网络遍布整个社会，照亮廿一世纪。     

Fabrication Processes for Embedding Thin Chips in Flat Flexible Substrates

These days, a lot of effort is being put in making electronic devices lighter and compacter, as the electronics market is rapidly expanding with all sorts of portable devices for home and everyday use. In this paper, a technology for embedding thin chips in flexible substrates is proposed that could be the next step for further reducing weight, while at the same time enhancing mechanical flexibility of the electronic circuitry. All stages in the technology's development cycle are discussed: from technology flow, test design and actual fabrication, to process optimization and characterization of the results. An outlook on the following steps of this technology is discussed in the conclusion.      

喷印设备偏心轴对喷印效果影响

全印制电子技术作为一种高效、低耗、节能、环保的工艺技术,成为业内人士关注的焦点,喷墨打印技术是全印制电子的核心工艺技术之一。我公司在研发喷印设备中,喷头采用双排错位实现了喷印图形的完整性。此过程中,出现奇偶排喷头喷印图形交替错位现象。本文对交替错位情况,建立了偏心轴模型,采用数学方法对其进行分析、研究,已成功解决奇偶排喷头喷印图形交替错位问题。     

Integrated electronics—A perspective

Integrated electronics promises to increase both the rate of change within the electronics industry and the pervasiveness of electronics as a whole, making it possible to remove very fundamental and interrelated limitations to applying the knowledge and tools of electronics, the most harassing of which have been reliability, cost, complexity, and that imposed by the specialized character of and relative sophistication of the science, engineering, and art of electronics. Evaluating the history, current status and the likely future of integrated electronics, it seems now highly probable that this new technology may introduce a terminal phase in which electronics will pervade all segments of our society to which it has pertinence. Basic requirements to ensure this appear to be 1) A relatively concentrated, highly-automated industrial complex to supply integrated circuitry and closely related compatible discrete componentry and 2) Establishment by this integrated-circuits industry of a common language for the input and output parameters which specifies its products, ultimately making it possible for members of other disciplines and professions to utilize, without themselves being electronics specialists, the knowledge, tools, and skills of electronics for the benefit of all of society.     

我国PCB工业面临的“四大”挑战(4)——“减成法”技术的创新发展的挑战

概述了传统PCB"减成法"面临着严重的挑战,必须走制造技术创新才是根本的出路。制造技术创新要先走局部技术创新,改革技术落后(或不能满足产品技术指标)的制造方法。然后,从"量变到质变",使PCB走上"全印制电子"化,实现环保型和可持续发展的产业。     

The future of electronic power Processing and conversion

At a workshop held on the Aeolian Islands in Sicily during May 2004 a group of academic and industry engineers from all over the world discussed the medium-and long-term future of power electronics and its applications in specific areas. The following main issues were identified and discussed. - The demand is not for power electronic solutions but for system integration of electronic power processing. A more multidisciplinary approach is needed. - We will witness a proliferation of energy storage in systems. The technology is in place and the improvement in system performance makes it worthwhile. - A large penetration of power electronics into power systems will happen within the next 25-30 years. The main transmission grid will not be affected. The power electronics development will be in distributed generation and in the loads. - The success of the integrated starter/generator, hybrid or electric cars depends on political decisions more than on technological advances. However, the success of a recent Japanese hybrid car and the cost of oil could trigger the critical momentum for large-scale use of power electronics in automotive applications. - We are moving toward standardized power supply building blocks for computers and other applications. The main push is for lower cost, and production technology becomes the important issue. - Demands for improved performance in a diversity of applications will stimulate R&D in power electronics in future. Intelligent control and energy management will come easily. Thermal and passive component integration is equally important and will require attention.     

军事电子先进制造技术发展战略分析

军事电子装备系统已经深入现代高科技战争的各个领域，在现代装备中的作用日趋重要。其研制生产对军事电子制造技术提出了更高的标准和要求。文中分析了军事电子装备发展对先进制造技术的需求，概括总结了国内外军事电子制造技术的现状和发展趋势，提出了我国军事电子先进制造技术的发展方向与研究重点及战略对策。     

Recent advances in power electronics technology for industrial andtraction machine drives

This paper presents a review of the state of the art of power electronics technology in both industrial and traction drive application. Key development trends include the dominance of AC adjustable-speed drives in new applications, with the squirrel-cage induction machine as the preferred machine in most cases. Particularly striking has been the rapid ascendance of the insulated-gate bipolar transistor (IGBT) as the predominant power switch in both industrial and traction applications ranging from fractional kilowatts to multimegawatts. Key current issues such as industrial drive input power quality and the effects of fast IGBT switching transients on the machines and electromagnetic interference (EMI) production are reviewed. Developments in electric traction for both rail and road vehicles are discussed, including the increasing modularity of new traction inverters in all sizes and the market introduction of new hybrid vehicles using advanced power electronics. The paper concludes with a discussion of expected future trends in power electronics technology that will likely expand the markets for industrial and traction drives during coming years     

An all-polymer-air PEDOT battery

Mass-produced organic electronics for internet-of-things, point of care diagnostics, smart labels and more suggest development of a “green” and recyclable electronics. One of the greatest challenges in achieving such a technology platform is to establish low-cost batteries that are metal-free. Here, we demonstrate a thin all polymer-air battery where the anode and cathode are based on the conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT). Polyethyleneimine (PEI) is combined with the PEDOT electrode to ensure air stability of its neutral or rather “low oxidized” form at the anode, while PEDOT is in its oxidized state at the cathode. The difference in the oxidation level between the two PEDOT electrodes produces an open circuit voltage of about 0.5 V. Upon discharge, PEI is consumed at the PEDOT anode, while O₂ reacts with the PEDOT cathode; thus demonstrating the first all-polymer-air battery.     

Integrating active, passive and EMI-filter functions in power electronics systems:a case study of some technologies

Assemblies of power semiconductor switches and their associated drive circuits are at present available in modules. Upward into the multi-kilowatt range, mixed mode module construction is used. This incorporates monolithic, hybrid, surface mount, and wirebond technology. However, a close examination of the applications in motor drives and power supplies indicates that there has been no dramatic volume reduction of the subsystem. The power semiconductor modules have shrunk the power switching part of the converter, but the bulk of the subsystem volume still comprises the associated control, sensing, electromagnetic power passives (inductors, transformers, capacitors) and interconnects. This paper addresses the improvement of power processing technology through advanced integration of power electronics. The goal of a subsystem in a module necessitates this advanced integration, incorporating active switching stages, electromagnetic interference (EMI) filters, and electromagnetic power passives into modules by integration technology. The central philosophy of the technology development research in the National Science Foundation Engineering Research Center for Power Electronic Systems is to advance the state of the art by providing the concept of integrated power electronics modules (IPEMs) for all these functions. The technology underpinning such an IPEM approach is discussed.     

电力电子行业在新能源建设中迎来新的发展机遇

本文介绍了电力电子技术在新时期中对科技进步和经济建设中将发挥越来越重要的作用。常见新能源领域和涉及到的常用工程。还重点介绍了电力电子技术在新能源领域的应用,进而阐述了电力电子技术发展的前景。     

Materials and applications of bioresorbable electronics

Bioresorbable electronics is a new type of electronics technology that can potentially lead to biodegradable and dissolvable electronic devices to replace current built-to-last circuits predominantly used in implantable devices and consumer electronics.Such devices dissolve in an aqueous environment in time periods from seconds to months,and generate biological safe products.This paper reviews materials,fabrication techniques,and applications of bioresorbable electronics,and aims to inspire more revolutionary bioresorbable systems that can generate broader social and economic impact.Existing challenges and potential solutions in developing bioresorbable electronics have also been presented to arouse more joint research efforts in this field to build systematic technology framework.     

项目教学法在数字电子技术课程中的应用

《数字电子技术》是高职电子专业一门承上启下的专业基础课,具有较强的逻辑性、应用性和工程实践性。在《数字电子技术》课程教学中采用项目教学法,在实际教学环节中少讲理论,多讲实用电路应用,多给学生提供更多实践动手机会,可以真正做到工学结合,理实一体,可以取得较好的教学效果。     

基于视场合成的成像光谱仪数据采集系统设计

推扫式遥感仪器可以采用多个镜头进行视场合成以提高仪器的总视场.视场合成技术涉及光学、机械、电子学系统技术.电子学系统需要完成多镜头数据的采集、融合及其他处理.在光谱仪地面测试数据采集系统中,每个镜头对应一个独立的数据采集与处理模块.控制模块同步各子模块的数据采集,并通过FIFO接口获取各子模块数据,然后通过PCI数据采集卡发送到PC机中.所有模块插在一个底板中,底板完成模块间的连接.介绍了多镜头下数据采集系统的设计与实现.     

At the crossroads of the information highway: new technologydirections in consumer electronics

The advent of consumer electronics dates back to the invention of the vacuum tube and its application to one of the first consumer electronics products-the radio. Since that time technology development and subsequent applications have expanded the scope of “consumer electronics.” Today, technology advances on many fronts including compression, digital signal processing, computing power, displays, communication, and software are cascading to cause a virtual explosion of new consumer electronics products, applications, and services. This paper describes “consumer electronics” within the context of the IEEE Consumer Electronics Society and explores future directions     

痛点导向的“电工电子技术”教学模式探究

紧扣国家全面培养优秀人才的教育方略,牢抓电工电子基础核心能力培养的课程地位,对实际学情进行了全面分析,树立了“四进阶式”教学目标和“三式一化”教学理念,并将其作为暗线贯穿于教学各方面,挖掘了“电工电子技术”教学存在的四大痛点,充分发挥实践教学、信息化网络技术等的补充作用,探索形成了以痛点为导向的混合教学模式,显著提升了“电工电子技术”教学质量实效。     

Ultrafast Photo-Thermal Switching of Terahertz Spin Currents

Dissipationless and scattering-free spin-based terahertz electronics is the futuristic technology for energy-efficient information processing. Femtosecond light pulse provides an ideal pathway for exciting the ferromagnet (FM) out-of-equilibrium, causing ultrafast demagnetization and superdiffusive spin transport at sub-picosecond timescale, giving rise to transient terahertz radiation. Concomitantly, light pulses also deposit thermal energy at short timescales, suggesting the possibility of abrupt change in magnetic anisotropy of the FM that could cause ultrafast photo-thermal switching (PTS) of terahertz spin currents. Here, a single light pulse induced PTS of the terahertz spin current manifested through the phase reversal of the emitted terahertz photons is demonstrated. The switching of the transient spin current is due to the reversal of the magnetization state across the energy barrier of the FM layer. This demonstration opens a new paradigm for on-chip spintronic devices enabling ultralow-power hybrid electronics and photonics fueled by the interplay of charge, spin, thermal, and optical signals.     

试论电子工业整机研究所的工艺技术管理

本文讨论电子整机研究所工艺技术管理的目的、意义、特点、作用、基本内容和做法,论述工艺设计与电路、结构设计的关系,强调应大力开发新工艺技术,加速技术改造,以期有效地促进电子工业的发展.     

A micromachined vacuum triode using a carbon nanotube cold cathode

A fully integrated on-chip vacuum microtriode using carbon nanotubes as field emitters was constructed laterally on a silicon surface using microelectromechanical systems (MEMS) design and fabrication principles. Each electrode in the triode was made of a hinged polycrystalline silicon panel that could be rotated and locked into an upright position. The device was operated at a current density as high as 16 A/cm/sup 2/. Although the transconductance was measured only at 1.3 /spl mu/S, the dc output power delivered at the anode was almost 40 /spl times/ more than the power lost at the grid electrode. The technique combines high-performance nano-materials with mature solid-state fabrication technology to produce miniaturized power-amplifying vacuum devices in an on-chip form, which could potentially offer a route of integrating vacuum and solid-state electronics and open up new applications for "old-fashioned" vacuum tubes.     

Polysilicon thin-film transistors on polymer substrates

Different approaches to fabricate low-temperature polycrystalline silicon (LTPS) thin film transistors (TFTs) on polymer substrates are reviewed and the two main routes are discussed: (1) standard fabrication of LTPS TFTs on glass substrates followed by a transfer process of the devices on the polymeric substrate; (2) direct fabrication of the devices on the polymeric substrate. Among the different techniques we have described in more detail the process we have recently developed for the fabrication of LTPS TFTs directly on ultra-thin polyimide (PI) substrate. LTPS TFT technology is particularly suited for high performance flexible electronics applications, due to the excellent device characteristics, good electrical stability and CMOS technology. Flexible display application remains the most attractive application for LTPS technology, especially for AMOLED displays, where device stability and the possibility to integrate the driving circuits make LTPS technology superior to all the other competitive TFT technologies. Among the other applications, particularly promising is also the application to flexible smart sensors, where integration of a front-end electronics is essential. Some examples of flexible gas sensors and pressure sensors, integrated with simple readout electronics based on LTPS TFTs and fabricated on ultra-thin PI substrate, are presented.