二代大功率IGBT短路保护和有源钳位电路设计

通过分析IGBT的器件特性和短路特性,以瑞士CONCEPT公司最新推出的二代SCALE-2模块2SC0435T作为核心部件,设计了大功率IGBT的短路保护和有源钳位电路。     

IGBT模块驱动及保护技术

对IGBT的栅极驱动特性、栅极串联电阻及IGBT的驱动电路进行了探讨。给出了过电流保护及换相过电压吸收的有效方法。     

用于有源电力滤波器的IGBT驱动及保护研究

介绍有源电力滤波器设计中EXB841型绝缘栅场效应晶体管(IGBT)驱动器的驱动原理和电路特点,对IGBT的栅极驱动特性、栅极串联电阻进行了探讨,给出过流保护和过压吸收的有效办法。样机试运行证明此种设计方案可靠、有效。     

基于有源电力滤波器的IGBT驱动及保护研究

介绍了采用M57962L设计的有源滤波器中绝缘栅场效应晶体管（IGBT）驱动器的驱动原理和电路特点,对IG—BT的栅极驱动特性、栅极串联电阻进行了探讨,给出过流保护和过压吸收的有效方法。样机试验证明了此种设计方案可靠、有效。     

一种适用于大功率IGBT模块串联工作的新型驱动电路

介绍了一种基于IGD515EI构成的IGBT串联应用的驱动电路,能够提供最大15A的驱动电流,采用光纤传输控制信号,解决了所有与MOSFET和IGBT有关的驱动、保护和电位隔离问题。应用结果表明,该驱动电路使用简单、可靠,具有优良的驱动和保护性能,尤其是其联合运用端口的设计非常适用于IGBT的串联使用。采用串联IGBT作为刚管调制器的放电开关,解决了单只IGBT耐压不够的问题。文中还介绍了IGBT栅极驱动电路和IGBT电压均衡电路的设计方法,并给出调制器的输出波形。     

一种新型智能功率模块（IPM）

介绍一种新型智能功率模块的功能、工艺及应用。该功率模块将多块IGBT芯片与其栅极驱动电路、短路保护、过流（OC）保护、过温（0T）保护、欠压（UV）锁定电路等集成封装于一体,具有供电简单、开关速度高、死区时间小、驱动效率高的特点。在技术方面,对IGBT芯片、续流二极管芯片（FWD）、控制驱动电路及封装结构等方面采取了多种优化处理措施,从而使其具有很高的性能价格比。     

混合动力电动汽车逆变系统中驱动高达600A—IGBT用的一种600V高压半桥式栅极驱动器集成电路

本文研制了一种600V高压半桥式、用于驱动IGBT栅极的集成电路（IC）。本文将先介绍基于监测IGBT传感电流的短路保护功能，然后介绍电平下移功能。之后，还将讨论另一种我们研制的短路保护功能电路，它通过对集电极和栅极的监测实现对IGBT的短路保护。本文中的IC最多可以驱动带有几个外部部件的600A／600V等级IGBT。本电路不仅适用于工业逆变器，而且适用于混合动力电动汽车。     

在线研讨会——与最新的产品发展、解决方案和技术更新同步

利用智能栅极驱动光耦解决设计难题时间:2012-12-6绝缘栅极晶体管(IGBT)及其功率模块一直是太阳能逆变器、马达驱动和不间断电源(UPS)等大功率工业应用的首选开关器件,因而需要栅极驱动电路来提供优化驱动和保护功能。最近飞兆半导体开发出一款具有优化成本、高可靠性的IGBT驱动光耦产品     

2QD15A17K-C驱动模块在二极管箝位式的三电平变频器的应用

IGBT驱动保护电路是IGBT可靠、稳定、高效运行的基础,是电力电子系统可靠运行的必不可少的一环。本文所提出的IGBT驱动保护电路是应用于二极管箝位式的三电平变频器当中,在介绍IGBT主要特性的前提下,介绍应用深圳青铜剑公司的2QD15A17K-C驱动模块设计具有高可靠性、高集成度,高效率等特点的IGBT驱动保护电路,最后给出以型号为2QD15A17K-C驱动模块的实际驱动电路。     

绝缘栅双极晶体管（IGBT）模块驱动及保护

对IGBT栅极驱动特性、栅极串联电阻及其驱动电路进行了探讨，提出了慢降栅压过流保护和过电压吸收的方法。     

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.