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2019 42nd International Spring Seminar on Electronics Technology (ISSE)最新文献

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Reliability of Glued Joints on Flexible Substrates During Accelerated Current Ageing 柔性基板上胶合接头在加速电流老化过程中的可靠性
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810273
M. Hirman, J. Navrátil, F. Steiner, A. Hamácek
This paper deals with reliability of joints glued by non-conductive adhesives (NCA) on flexible substrates during electrical current ageing. Also the comparison of NCA joints ageing with ECA joints ageing is presented in this paper. Two types of adhesives were used for the experiment-non-conductive UV curable acrylic adhesive Loctite AA3926 (NCA) and electrically conductive two part epoxy adhesive MG 8331S (ECA). The purpose of the experiment was to verify the reliability of NCA joints during the electrical current accelerated ageing. The electrical resistance of UV NCA joints on flexible DuPont Pyralux substrate before, during and after electrical current load was better than resistance of ECA joints and UV NCA can be recommended.
本文研究了非导电胶粘剂(NCA)粘接柔性基材在电流老化过程中的可靠性。并对NCA节点的老化与ECA节点的老化进行了比较。实验采用两种胶粘剂:不导电的紫外光固化丙烯酸胶粘剂乐泰AA3926 (NCA)和导电的双组分环氧胶粘剂MG 8331S (ECA)。实验的目的是验证NCA接头在电流加速老化过程中的可靠性。柔性杜邦Pyralux基板上UV NCA接头在电流负荷前、负荷中、负荷后的电阻均优于ECA接头,可推荐使用UV NCA。
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引用次数: 3
Loss Factor and Non-Linearity of Volt-Ampere Characteristic of Capacitors from Metalized PP Film 金属化PP薄膜电容器伏安特性的损耗因子和非线性
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810267
P. Mach, M. Horák
Capacitors made of polypropylene film metalized on one or both surfaces are examined for a long time. The loss factor of these capacitors is very low and its changes during the climatic aging are low. Therefore, there are examined new ways how to inspect the changes of quality of these capacitors. One possible way is measurement of non-linearity of Voltage-current characteristic of these capacitors. This parameter is evaluated according to the value of the third harmonics component that occurs on the capacitor when it is supplied with a sinusoidal current. The capacitors from five different manufacturers have been temperature aged for 5,316 hours and values of the loss factor and non-linearity have been measured continuously throughout the aging period. It has been found that for some types of capacitors the courses are similar, whereas for other type differs significantly. The reason is using of different types of PP film and technology of capacitors manufacturing.
在一个或两个表面镀金属的聚丙烯薄膜制成的电容器长期以来一直被研究。这些电容器的损耗系数很低,其在气候老化过程中的变化很小。因此,为检测这些电容器的质量变化提供了新的途径。一种可能的方法是测量这些电容器的电压电流特性的非线性。该参数是根据电容在正弦电流下产生的第三次谐波分量的值来评估的。来自五家不同制造商的电容器进行了5,316小时的温度老化,并在整个老化期间连续测量了损耗因子和非线性的值。已经发现,对于某些类型的电容器,课程是相似的,而对于其他类型的电容器,课程差异很大。其原因是使用不同类型的PP薄膜和电容器制造技术。
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引用次数: 1
Impact of Atmospheric Discharges on Thick-Films Electrodes 大气放电对厚膜电极的影响
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810275
Tomasz Matusiak, A. Dąbrowski, L. Golonka
In this article, we present the results of work on the effect of Atmospheric Pressure Glow Discharge (APGD)on the reliability of various screen printed electrodes depostied on Low Temperature Co-fired Ceramics (LTCC)and alumina substrate (96% Al2O3). Influence of electrodes material and their thickness has been checked with AC-driven discharge at ambient air.
在本文中,我们介绍了大气压辉光放电(APGD)对低温共烧陶瓷(LTCC)和氧化铝衬底(96% Al2O3)上沉积的各种丝网印刷电极可靠性的影响的工作结果。用环境空气下的交流驱动放电考察了电极材料及其厚度的影响。
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引用次数: 1
Application of Stretchable Membrane with Ferrite Flaky Fillers in Inductive Displacement Sensor 铁氧体片状填料可拉伸膜在电感式位移传感器中的应用
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810260
N. Blaz, M. Kisić, L. Zivanov, Č. Žlebič, S. Aleksic, M. Damnjanović
In this paper implementation of composite membrane with LTCC (Low Temperature Co-fired Ceramic)ferrite flaky fillers in realization of inductive displacement sensor is presented. Membrane was realized by placing a silicone layer in mold, followed by adding ferrite flaky fillers in active area of membrane. Final step in membrane realization was addition of top layer of silicone. Sensor was realized by employing 3D printing technology and it was made of four main parts: bottom part with spiral inductor, spacer in the middle and stretchable membranes covered with top part.
本文介绍了低温共烧陶瓷(LTCC)铁氧体片状填料复合膜在电感式位移传感器中的实现方法。通过在模具中放置硅酮层,然后在膜的活性区添加铁氧体片状填料来实现膜的制备。薄膜成型的最后一步是添加有机硅顶层。传感器采用3D打印技术实现,由底部带螺旋感应器、中间垫片和顶部覆盖可拉伸膜四个主要部分组成。
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引用次数: 1
Impact of Warpage Effects on Quality and Reliability of Solder Joints 翘曲效应对焊点质量和可靠性的影响
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810270
Oliver Albrecht, H. Wohlrabe, K. Meier
Printed circuit boards (PCB)and SMD packages are made from different materials which coefficients of thermal expansion can differ much. Hence, under thermal load, e.g. board assembly or at field conditions, PCB and package deformation and deviation from the initial state often occur as warpage. During board assembly this warpage can cause failures such as open solder joints and/or shorts of solder joints. In this paper, the use the of shadow moire technique will be introduced for capturing the warpage under thermal loads. Measurement results of single substrates and a selected BGA package will be shown. Furthermore, a design process for PCBs to be applied for investigation of the influence of assembly process parameter will be described. It is assumed that the applied variations and their influence on the assembly quality are linked by the equilibrium of mechanical forces between PCB, BGA and solder joint. Additionally, it is assumed that mechanical stress - especially in out-of-plane direction-may occur in the solder joints. These thoughts apply for soldering process as well as temperature cycling conditions. A finite element model was implemented to analyze the stress for the selected BGA under defined conditions and to investigate warpage impacts on reliability. Finally, a novel approach to measure the electrical functionality will be introduced addressing BGAs under test which come with a high number of connections.
印刷电路板(PCB)和SMD封装由不同的材料制成,其热膨胀系数可能相差很大。因此,在热负荷下,例如电路板组装或在现场条件下,PCB和封装变形和偏离初始状态经常发生翘曲。在电路板组装过程中,这种翘曲会导致诸如焊点打开和/或焊点短路等故障。本文将介绍利用阴影云纹技术捕捉热载荷下的翘曲。将显示单个基板和选定的BGA封装的测量结果。此外,还将描述用于研究装配工艺参数影响的pcb设计过程。假设应用变化及其对装配质量的影响与PCB、BGA和焊点之间的机械力平衡有关。此外,假定机械应力-特别是在面外方向上-可能发生在焊点上。这些想法适用于焊接过程以及温度循环条件。采用有限元模型分析了选定的BGA在规定条件下的应力,并研究了翘曲对可靠性的影响。最后,将介绍一种测量电气功能的新方法,用于解决具有大量连接的被测bga。
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引用次数: 2
Stress Characterization of Ceramic Substrates by Laser Speckle Photometry 激光散斑光度法表征陶瓷衬底的应力
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810271
Lili Chen, U. Cikalova, S. Muench, M. Roellig, B. Bendjus
Direct copper bonding (DCB) substrate consisting of an Al2O3-ceramic layer in between two thick copper layers is one of the most powerful ceramic substrates for electronic applications. During the manufacturing process or under the service loading, high thermal or mechanical stress would be occurred. Extreme stress concentration might increase and in consequence copper structure rip off the ceramic substrates by cracking and conchoidal fractures. To avoid the crack initiation and guarantee a good quality state of ceramic substrates, the residual stress condition should be monitored. In this paper, an optical non-destructive testing method - Laser Speckle Photometry (LSP) will be demonstrated to determine mechanical stresses in ceramic substrates. The static speckle pattern is generated on the sample surface by illumination of a laser source, and sample is loaded by a 3-point-bending device to introduce surface strain, which activates a time resolved speckle signal. By recording and analyzing the quasi static speckle pattern, the speckle signal can be related to applied external mechanical signal. The resulting measurement signal was calibrated by stresses, calculated via a finite-element-model FEM. The potential of LSP for non-destructive characterization and monitoring of stress condition will be shown in details.
直接铜键合(DCB)衬底由两层厚铜层之间的氧化铝陶瓷层组成,是电子应用中最强大的陶瓷衬底之一。在制造过程中或在使用载荷下,会产生较高的热应力或机械应力。极端应力集中可能会增加,导致铜结构以裂纹和贝壳状断裂的形式从陶瓷基体上脱落。为了避免裂纹的产生,保证陶瓷基板的良好质量状态,需要对陶瓷基板的残余应力状态进行监测。在本文中,一种光学无损检测方法-激光散斑测光(LSP)将演示,以确定陶瓷基板的机械应力。通过激光光源照射在样品表面产生静态散斑图案,并通过三点弯曲装置加载样品以引入表面应变,从而激活时间分辨散斑信号。通过记录和分析准静态散斑图,可以将散斑信号与外加机械信号联系起来。得到的测量信号通过应力校准,通过有限元模型FEM计算。LSP在非破坏性表征和应力状态监测方面的潜力将被详细展示。
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引用次数: 1
Influence of Temperature Shocks on Climatic Aging of Conductive Adhesive Joints 温度冲击对导电胶接头气候老化的影响
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810175
Ferdinand Závora, P. Mach
Adhesive joints made of two types of electrically conductive adhesives with epoxy matrix and silver filler were prepared by adhesive assembly of 0R0 resistors of the type 1206 on test boards that made four-point measurement of the joints resistance possible. The adhesives were applied by stencil printing. The joints were first exposed by 10 or 40 temperature shocks −40/+80 ° C. The exposure time of the samples at each temperature was 15 minutes; the time of the temperature change did not exceed 10 seconds. Then the joints were climatic treated at 80 °C and 80% relative humidity for 168 and 336 hours, respectively. It was inspected how the exposition of the joins by the temperature shocks will influence their resistance and and subsequently changing their resistance to climatic treatment. It was found that application of temperature shocks improved electrical conductivity of the joints formed of one adhesive and did not change properties of the joints made of the second one. An influence of the temperature shocks on the course of the climatic treatment of the joints was not found.
将1206型0R0电阻器粘接在测试板上,制备了以环氧基和银填料两种导电胶粘剂制成的粘接接头,使接头电阻四点测量成为可能。胶粘剂应用于模板印刷。分别在−40/+80℃下进行10次或40次温度冲击,每次温度下试样的暴露时间为15分钟;温度变化的时间不超过10秒。然后分别在80°C和80%相对湿度下进行168和336小时的气候处理。检查了温度冲击对连接的暴露将如何影响其耐受性,并随后改变其对气候处理的耐受性。结果表明,施加温度冲击可以提高一种胶粘剂形成的接头的导电性,而对另一种胶粘剂形成的接头的性能没有影响。没有发现温度冲击对接头气候处理过程的影响。
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引用次数: 0
3D Micro-Transformers Fabricated Inside Ferrite-Dielectric LTCC Substrate 在铁氧体-介电LTCC衬底内制造三维微变压器
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810165
A. Maric, L. Zivanov
Presented findings referee to continuance of research of ceramic passive components (inductors and transformers). Paper presents design, fabrication and characterization results of three 3D micro-transformers fabricated inside combined ferrite-dielectric LTCC (Low Temperature Co-fired Ceramics)stack. Basic designed geometry consists of centrally connected three turn square overlapping windings (primary and secondary)placed on different tape layers of the formed LTCC stack. Transformers windings are placed on outer dielectric tapes and number of ferrite tapes in between is varied. Characterization is performed in lower RF range and results of transformer windings inductance and Q-factor are presented. It is shown that inductance and Q-factor values of primary winding do not vary much with increase of thickness of ferrite layer. However, increase of the same characteristics value of secondary winding is noticeable as number of in-between tapes increases (44% inductance and 25% Q-factor value of the secondary winding).
本文的研究成果为陶瓷无源元件(电感和变压器)的进一步研究提供了依据。介绍了铁氧体-介电低温共烧陶瓷(LTCC)复合堆内三维微变压器的设计、制造和表征结果。基本设计的几何结构包括中心连接的三匝方形重叠绕组(初级和次级),放置在形成的LTCC堆叠的不同带层上。变压器绕组置于外层介质带上,中间的铁氧体带的数目是不同的。在较低的射频范围内进行了表征,并给出了变压器绕组电感和q因子的结果。结果表明,随着铁氧体层厚度的增加,初级绕组的电感值和q因子值变化不大。然而,随着中间带数的增加,次级绕组的相同特性值也明显增加(次级绕组的电感值为44%,q因子值为25%)。
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引用次数: 0
Research of the Photocapacitor Effect in A2B6 Monocrystals A2B6单晶中光电电容效应的研究
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810269
O. Oliinyk, O. Tsybulskyi, Viktor Sergiychuk, B. Tsyganok
This paper is devoted to the research of the photocapacitor effect in A2B6 semiconductor crystals - CdS and CdTe monocrystals with needle structure. Unlike existing thin film monocrystals and bulk materials manufactured from CdS/CdTe, the monocrystals mentioned above have high photoconductivity (Rdark/Rlight = 104 and higher)and low lifetime of charge carriers (less than 1 ms). This feature allowed creating a variable depletion capacitance in the metal-semiconductor contact, its value can be reduced almost to the zero by generating photoelectrons near the contact region. The experimental results of the transmission of rectangular pulses through structures CdS-Indium and CdTe-Indium have been obtained. Irradiation intensity limits has been found, after which the depletion capacitance becomes insignificantly small compared to the diffusion capacity inside the photoconductive crystals.
本文主要研究了A2B6半导体晶体——针状结构的CdS和CdTe单晶中的光电容效应。与现有的由CdS/CdTe制成的薄膜单晶和块状材料不同,上述单晶具有高光导率(Rdark/Rlight = 104或更高)和低载流子寿命(小于1 ms)。该特性允许在金属-半导体接触中创建可变耗尽电容,其值可以通过在接触区域附近产生光电子而减少到几乎为零。得到了矩形脉冲通过cds -铟和cdte -铟结构的实验结果。发现了辐照强度的极限,在此极限之后,耗尽电容与光导晶体内部的扩散容量相比变得微不足道。
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引用次数: 0
Electronic Sensor System for Monitoring the Temperature Status of Rolling Stock in Motion 监测运动中机车车辆温度状态的电子传感器系统
Pub Date : 2019-05-01 DOI: 10.1109/ISSE.2019.8810185
A. Stoynova, N. Nenov, B. Bonev, Desislava Yosifova
This work is an important step in the building of a Checkpoint System - national system for monitoring and control of rolling stock during motion, for the needs of the railway infrastructure in Bulgaria. Implementation of the system ensures a high level of safety of train movements and prevention of railway incidents. A basic function of the whole system is the identification of unacceptable overheating of rolling stocks' components mainly wheel bearing assemblies and brake sets, and/or other components of a rail vehicle. The chosen approach involves the use of non-contact infrared temperature sensors. It can be used also thermal imaging cameras instead of individual temperature sensors, which increase the possibilities of the temperature status monitoring of the railway rolling stock. A concept, model and kit of a real-time system for thermal imaging have been developed and presented in the present paper. In order to optimize the efficiency of the overall system, a techno-economic analysis has been made.
这项工作是为了保加利亚铁路基础设施的需要而建立检查站系统- -监测和控制行驶中的铁路车辆的国家系统方面的一个重要步骤。该系统的实施可确保列车运行的高度安全及防止铁路事故的发生。整个系统的一个基本功能是识别机车车辆部件(主要是车轮轴承组件和制动组)和/或轨道车辆的其他部件的不可接受的过热。所选择的方法包括使用非接触式红外温度传感器。它还可以使用热成像仪代替单独的温度传感器,这增加了铁路车辆温度状态监测的可能性。本文提出了一种热成像实时系统的概念、模型和套件。为了优化整个系统的效率,进行了技术经济分析。
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引用次数: 1
期刊
2019 42nd International Spring Seminar on Electronics Technology (ISSE)
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