检索结果-内蒙古大学图书馆

International Symposium on High Density Packaging and Microsystem Integration (HDP)

作者： Xia Zhang Camilla Karnfelt Johan Liu Shiwei Ma Xu Wang Linqin Meng Herbert Zirath SMIT Center & Department of Microtechnology Nanoscience Chalmers University of Technology Gothenburg Sweden Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Education & SMIT Center Shanghai University Shanghai China Department of Microtechnology and Nanoscience Chalmers University of Technology MC2 Microwave Electronics Laboratory Gothenburg Sweden School of Communication and Information Engineering Shanghai University China

Liquid crystal polymer (LCP) materials are considered to be promising substrates for RF applications because of the unique combination of features and performance. Although LCP films offer many excellent properties, the poor adhesion between copper and LCP has prevented the use of these materials in flexible microwave circuits. In order to obtain better adhesion between LCP and copper, oxygen plasma pretreatment of the LCP substrate and a thin Ti adhesion layer are introduced before a Cu layer was sputtered on to the substrate. Finally, a novel and compact microstrip ultra wide band (UWB) band pass filter (BPF) is fabricated on LCP substrates using standard processing technology i.e. physical vapor deposition (PVD), lithography and wet etching, which provides LCP substrate the feasibility of the application in RF wireless systems.

关键词： Ultra wideband technology Band pass filters Adhesives Copper Crystalline materials Radio frequency Liquid crystal polymers Microwave circuits Flexible printed circuits Plasma applications

来源：评论

学校读者我要写书评

暂无评论

Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Encapsulation of OLED device by Using Anisotropic Conductive...

引用

International Symposium on High Density Packaging and Microsystem Integration (HDP)

作者： Yan Zhang Mans Andreasson Hua Zhou Johan Liu Thorvald Andersson Jing-yu Fan Department of Applied Mechanics Chalmers University of Technology Gothenburg Sweden Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Education & SMIT Center Shanghai University China Applied seminconductor Physics Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden SMIT Center & Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai China

Organic light emitting diodes (OLEDs) is one of the most potential display technologies in the flat panel display (FPD) field, and its applications include simple monochrome large-area lighting to full color, video-capable graphics displays and so on. As organic materials are susceptible to humidity and oxygen, encapsulation is a key issue for OLED device reliability. In the present paper, two kinds of OLED samples have been studied; one encapsulated by adhesive matrix with fillers, and one without encapsulation. Variation of the electrical parameters of the OLED samples with respect to exposure time has been measured. The primary experiment investigation was carried out for the OLED sample sealed with an anisotropic conductive adhesive. Encapsulation material analysis, such as choices of different fillers/absorbent in the adhesive matrix, optimization of polymer matrix etc., will be conducted in future work.

关键词： Encapsulation Organic light emitting diodes Anisotropic magnetoresistance Conductive adhesives Flat panel displays LED lamps Graphics Organic materials Humidity Materials reliability

来源：评论

学校读者我要写书评

暂无评论

Exciplex formation and properties at organic solid interface in organic light emitting devices

引用

Journal of Shanghai University(English Edition) 2006年第2期10卷 156-160页

作者：朱文清蒋雪茵张志林 Key Laboratory of Advanced Display and System Application of Education Ministry Shanghai University Shanghai 200072 P.R. China

The bilayer organic light emitting devices （OLEDs） using two common aromatic diamines as hole transporting materials （HTMs） and BBOT （2,5-bis（5-tert-butyl-2-benzoxazolyl）thiophene） as electron transporting material have been prepared, in which the electroluminescent spectra are different from the fluorescent spectra of each of the constituent materials. The electroluminescence is mainly attributed to exciplex confirmed by photoluminescence and electroluminescence measurements, and the type of exicplex is deternfined in terms of the energy level diagram of the bilayer devices, By comparing the molecular structures and energy levels of TPD and NPB, it is demonstrated that the structure of a molecule as well as its energy level has an effect on the exciplex formation.

关键词： organic electroluminescence photoluminescence exciplex color tuning molecular structure

来源：评论

学校读者我要写书评

暂无评论

Mosaic Generation in H.264 Compressed Domain

Mosaic Generation in H.264 Compressed Domain

引用

International Conference on Intelligent Sensing and Information Processing (ICISIP)

作者： Zhi Liu Zhaoyang Zhang Liquan Shen Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China School of Communication and Information Engineering Shanghai University Shanghai China

This paper presents an efficient approach to mosaic generation in H.264 compressed domain. The proposed mosaic generation approach fully exploits several new coding characteristics of the H.264 standard, i.e., variable block size and the quarter-pel accuracy of motion vector (MV). A uniformly sampled and normalized MV field is first derived from the H.264 compressed video. Then an affine model is used to estimate the global motion from the normalized MV field, and the model parameters are iteratively refined based on outlier rejection scheme. Finally, the most recent and reliable background pixels from multiple frames are warped to the reference frame and then used to integrate the final mosaic. Experimental results demonstrate that the proposed approach is efficient for mosaic generation in H.264 compressed domain.

关键词： Video compression Motion estimation Video sequences Object segmentation Iterative algorithms Image motion analysis Parameter estimation Character generation Indexing Video coding

来源：评论

学校读者我要写书评

暂无评论

Object based disparity estimation and view synthesis for immersive video conferencing

Object based disparity estimation and view synthesis for imm...

引用

25th PCS: Picture Coding Symposium 2006, PCS2006

作者： An, Ping Liu, Jia Zhang, Zhaoyang School of Communication and Information Engineering Shanghai University 149 Yanchang Road Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education 149 Yanchang Road Shanghai 200072 China

ISBN: (纸本)300018726X

In immersive three-dimensional video conferencing system, disparity estimation and view synthesis are the key technologies that not only realize disparity map coding and transmission, but also achieve the effect of "Continuous look-around". Applying of object-based methods can insure obtaining accurate and fast disparity estimation that is convenient for intermediate view synthesis. Another advantage is that the segmented objects can be seamlessly embedded into virtual or natural environment in three-dimensional video conferencing. In this paper, an intermediate view synthesis algorithm based on object with large camera baseline is put forward. Firstly, foreground area is distinguished from background, and the disparity of only object area is estimated by a predict recursion method to increase the matching speed and accuracy. Then the intermediate view image is created by counter-map technology. Experimental results show that our synthesis method can obtain disparity map and intermediate views with high quality.

关键词： Video conferencing

来源：评论

学校读者我要写书评

暂无评论

An Adaptive Fractional Pixel Search Algorithm

An Adaptive Fractional Pixel Search Algorithm

引用

International Conference on Intelligent Sensing and Information Processing (ICISIP)

作者： Liquan Shen Zhaoyang Zhang Zhi Liu Wenjun Zhang Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China Institute of Image Communication& Information Processing Shanghai Jiaotong University China

In this paper, we propose an adaptive fractional pixel search algorithm for reduction computation its load. Based on that SAD (sum of absolute difference) error surface is unimodal within the range of plusmn1 pixel, a novel fractional pixel search bypass strategy is first proposed; Then, a strategy of fractional pixel search early termination based on all-zero block detection is proposed. Finally, an adaptive fractional pixel search algorithm adopting above strategies and improved CBFPS (center biased fractional pixel search) algorithm is proposed. Compared with the fractional pixel full search algorithm and JVT-F017 that adopts CBFPS, simulation results show that the proposed algorithm can reduce 76.60% and 68.22% fractional pixel search points respectively while it still maintains similar coding efficiency.

关键词： Motion estimation Vectors Video coding Testing Paramagnetic resonance Pixel Image communication Information processing Computer displays Redundancy

来源：评论

学校读者我要写书评

暂无评论

Robust moving object segmentation in the compressed domain for H.264/AVC video stream

Robust moving object segmentation in the compressed domain f...

引用

25th PCS: Picture Coding Symposium 2006, PCS2006

作者： Yang, Gaobo Yu, Shengfa Zhang, Zhaoyang Network and Information Security Lab School of Computer and Communication Hunan University Changsha Hunan 410082 China School of Electronic Science and Engineering National University of Defense Technology Changsha Hunan 410073 China Key Laboratory of Advanced Displays and System Application Shanghai University Ministry of Education Shanghai 200072 China

ISBN: (纸本)300018726X

Moving object segmentation in the compressed domain plays an important role in many real-time applications, e.g. video indexing, video surveillance, etc. H.264/AVC is the up-to-date video coding standard, which employs several new coding tools and provides a different video format. In this paper, a robust spatio-temporal segmentation approach to extract moving objects in the compressed domain for H.264 video stream is proposed. Coarse moving objects are firstly extracted from the motion vector field through the MRF classification process. Spatial segmentation is based on the HT coefficient, which is used to refine the object boundary of temporal segmentation results. Fusion of spatio-temporal segmentation is based on region projection based labeling technique. Further edge refinement is performed to smooth the object boundaries. The performance of the proposed approach is illustrated by simulation carried on several test sequences. Experimental results show that the proposed approach can provide the visually similar results as by using spatial domain process with much less computational complexity.

关键词： Image segmentation

来源：评论

学校读者我要写书评

暂无评论

New Nano-Thermal Interface Materials (Nano-TIMs) with SiC Nano-Particles Used for Heat Removal in Electronics Packaging applications

New Nano-Thermal Interface Materials (Nano-TIMs) with SiC Na...

引用

International Symposium on Electronic Materials and Packaging

作者： Wen Xuan Wang Xiuzhen Lu Johan Liu Michael Olugbenga Olorunyomi Tomas Aronsson Dongkai Shangguan Key Laboratory of Advanced Display and System Applications (Chinese Ministry of Education) and SMIT Center Shanghai University Shanghai China SMIT Center & Department of Microtechnology and Nanoscience University of Technology Gothenburg Sweden

Heat dissipation of semiconductor packages has become one of the limiting factors in miniaturization. A new Nano Thermal Interface Material (Nano-TIM) with potential high thermal conductivity and excellent mechanical properties manufactured by electrospinning process has been published earlier. In the present work, SiC nano-particles were added into the electrospinning solution to improve the thermal conductivity of the film. The produced Nano-TIM has a nano scale structure with embedded nano-SiC distributed randomly. Scanning Electrical Microscope (SEM) was used to determine the morphology of the film. Thermal properties were measured. The results show that the Nano-TIM has good thermal properties and it can be further improved by changing the mass concentration of the SiC nano particles.

关键词： Nanostructured materials Silicon carbide Electronics packaging Thermal conductivity Electronic packaging thermal management Conducting materials Semiconductor materials Scanning electron microscopy Semiconductor device packaging Mechanical factors

来源：评论

学校读者我要写书评

暂无评论

Effects of curing agents on the conductivity of isotropical conductive adhesives (ICAs)

Effects of curing agents on the conductivity of isotropical ...

引用

International Symposium on Electronic Materials and Packaging

作者： Xuechun Lin Qinghua Li Jianhua Zhang Key Laboratory of Advanced Display and System Applications (Ministry of Education) School of Mechatronic and Automation Engineering Shanghai University Shanghai China Department of Fine Chemicals and Materials Engineering Shenzhen Polytechnic Shenzhen China

Curing agents greatly influence the electrical conductivity of epoxy resin/Ag composed isotropic conductive adhesives (ICA). In this paper, three kinds of latent curing agents-dicyandiamide (DICY), boron-amine complex (594) and imidazole derivate (MZ) were used for formulating one-package epoxy-based ICA, respectively. The investigation showed that the 70% silver-containing conductive adhesive with imidazole derivate as curing agent has excellent conductivity and its bulk resistivity was 5times10 -4 Omegaldrcm. boron- amine complex also show good conductivity in the same formula. However, the ICA with DICY as curing agent gave poor conductivity performance. The different curing mechanisms were linked to the different conductivity of ICAs cured by different agents. In the ICA with DICY as curing agent, the agent has two strong polar N and -CN group, it has strong molecular adhesion to silver. Basically one DICY molecule can link 4 epoxy groups. During the curing process, the active functional groups (- CN-, -N and -OH) link with silver and possibly form a layer of dense polymer capsulate covering on the surface of silver. This polymer capsulate is the key reason to increase the tunnelling resistance. So the ICA with DICY as curing agent gave poor conductivity. When use imidazole derivant or boron-amine complex as curing agent, which follows the anion or cation-catalytic-polymerization curing mechanism, the curing products were polyether gloss network. In such situation, the interaction between resin and silver is weak, therefore decreases the tunnelling resistance , thus can achieve good conductivity.

关键词： Curing Conductivity Conductive adhesives Independent component analysis Silver Contact resistance Electric resistance Polymers Epoxy resins Surface resistance

来源：评论

学校读者我要写书评

暂无评论

RF characterization of flip-chip anisotropic conductive adhesives joints

RF characterization of flip-chip anisotropic conductive adhe...

引用

International Symposium on High Density Packaging and Microsystem Integration (HDP)

作者： Xu Wang Zhaonian Cheng J. Liu Key Laboratory of Advanced Display and System Applications and Sino-Swedish Microsystem Integration Technology SMIT Shanghai University Shanghai China SMIT Center and Department of Microtechnology and Nanoscience Chalmers University of Technology Goteborg Sweden

Anisotropic conductive adhesives (ACAs) have been proved to own good performance in high frequency applications. However, the effect of distribution of conductive particles in ACAs on RF (radio frequency) characterization is not fully understood. Finite difference in time domain (FDTD) method based electromagnetic software QuickWave is used to establish the structure and investigate RF characterization of ACA. The effect of distribution of conductive particles both in random and uniform distribution is simulated. Furthermore, the influence of conductor overlap is also investigated. An equivalent lumped circuit is also set up. The results show in a certain particles number, that there is minor influence in different distribution of conductive particles, and that as expected, the conductor overlap should be minimized to improve high frequency performance

关键词： Radio frequency Anisotropic magnetoresistance Conductive adhesives Finite difference methods Conductors Circuit simulation Microwave theory and techniques Time domain analysis Integrated circuit interconnections Bonding

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：