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Simulation of Bonding and Reliability for Micro-LED Array Based on Copper Pillar Bump 21

Simulation of Bonding and Reliability for Micro-LED Array Ba...

21st China International Forum on Solid State Lighting and 10th International Forum on Wide Bandgap Semiconductors, SSLCHINA: IFWS 2024

作者： Fu, Hao Yang, Zhu Meng, Xinhui Fan, Hong Lu, Xiuzhen Yin, Luqiao Zhang, Jianhua School of Microelectronics Shanghai University Shanghai201800 China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai2000072 China

ISBN: (纸本)9798331541149

With the rapid development of automotive electronics and near-eye displays, more stringent requirements have appeared for the heterogeneous integration technology of Micro-LED. Copper pillar bumps, which offer enhanced electrical conductivity, thermal conductivity, and mechanical properties, can meet the demands for higher density and smaller size packaging in Micro-LED array applications. In Micro-LED system integration, bonding plays a critical role as the bonding conditions significantly influence the performance and reliability of Micro-LED. Consequently, it is essential to investigate the effects of bonding conditions on Micro-LED devices to ensure optimal performance and reliability of copper pillar bumps. A model with copper pillar bumps and Micro-LED chips was presented with a bonding simulation and parameter analysis performed in this paper. The finite element method was utilized to examine the thermal-mechanical coupling of one quarter of a 5×5 Micro-LED array model in this paper. The stress and deformation of the bumps during the bonding process and the effects of bonding conditions on the stress and deformation of the bumps was investigates. ©2024 IEEE.

关键词： bonding copper pillar bump Micro-LED orthogonal test

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Technical analysis of 3DTV and outstanding issues

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Journal of Shanghai University(English Edition) 2011年第4期15卷 316-320页

作者：张兆杨程浩沈礼权杨高波 Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of Education College of Computer and Communication Hunan University

This paper analyzes the technical characteristic of three-dimensional display technology （3DTV） system and some core technologies yet to be solved. It points out the ways to solve these problems and presents an effe... 详细信息

关键词： three-dimensional (3D) display multi-view/depth coding inter-view rendering discomfort of watching threedimensional display technology (3DTV)

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Low subthreshold swing enables high synaptic weight gains based on channel-side gate dependent electrolyte transistors FET design 21

Low subthreshold swing enables high synaptic weight gains ba...

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21st China International Forum on Solid State Lighting and 10th International Forum on Wide Bandgap Semiconductors, SSLCHINA: IFWS 2024

作者： Gong, Qiming Wang, Fei Zheng, Hao Li, Mengjiao School of Microelectronics Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

ISBN: (纸本)9798331541149

With the development of IoT and AI technologies, brain-like synaptic devices with precise weight modulation of synaptic plasticity and controllable preparation are of great significance for developing neuromorphic computing and intelligent sensing technologies. In this paper, we design a series of side-gate electrolyte transistors with varying gate-channel distances and systematically examine the structural design effect on synaptic weight modulation. A synaptic transistor device with an ultra-low subthreshold swing of 89.8 mV/dec has been successfully achieved by optimizing the gate-channel design. Additionally, Further characterizations of the short-term synaptic plasticity and long-term synaptic plasticity of synaptic transistors uncover the flexible modulation of the gate-channel distance-dependent synaptic weight gain behaviors, which span from as low as 6.1 to as high as 87.5 under 50 successive stimuli. The results of this work provide a reliable solution for the design and preparation of high-performance synaptic devices and lay the foundation for high-precision neural networks and intelligent sensing technologies. ©2024 IEEE.

关键词： Integrated circuit design

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Adaptive early termination of fast mode decision in MVC based on inter-view correlation

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Journal of Shanghai University(English Edition) 2011年第4期15卷 321-324页

作者：沈礼权张兆杨杨高波 Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of Education College of Communication Engineering Hunan University

Variable size motion estimation （ME） and disparity estimation （DE） are employed to select the best coding mode for each macroblock （MB） in the current joint multiview video model （JMVM）. This technique achieves the highest possible coding efficiency, but it results in extremely large computation complexity which obstructs the multiview video coding （MVC） from practical application. This paper proposes an adaptive early termination of fast mode decision algorithm for MVC. It makes use of the coding information of the corresponding MBs in neighbor view based on inter-view correlation to early terminate the mode decision procedure. Experimental results show that the proposed fast mode decision algorithm can achieve computational 50% computation saving with no significant loss of rate distortion （RD） performance.

关键词： multiview coding mode decision motion estimation (ME) disparity estimation (DE)

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High-efficiency red phosphorescent emitter and its application in color-tunable white organic light-emitting diodes

High-efficiency red phosphorescent emitter and its applicati...

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作者： Zhang, Qi Guo, Kun Ping Zhang, Jing Wei, Bin School of Materials Science and Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China

We report high-efficiency red organic light-emitting diodes (OLEDs) and color-tunable white OLEDs using a novel red phosphorescent material. The transient PL decay measurement indicates that this red emitter exhibits a very-short lifetime, which is dependent on dopant concentration. Based on an optimized dopant concentration, we have fabricated a high-efficiency red electroluminescent device with a maximum external quantum efficiency (EQE) up to ηEQE= 22.6%. Furthermore, the color-tunable white organic light-emitting diodes by introducing this red dopant have been fabricated, in which CIE chromaticity coordinates follows the Planckian locus in warmer-color regions. Copyright © 2015 American Scientific Publishers All rights reserved.

关键词： Luminescent devices

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Electro-optical performance of OLED with MEH-PPV fabricated by solution process 26

Electro-optical performance of OLED with MEH-PPV fabricated ...

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26th International display Workshops, IDW 2019

作者： Lee, Seok Je Yao, Fangnan Lee, Seung Il Jin, Cao Kim, Woo Young Moon, C.-B. Jhun, Chul Gyu Department of Electronic Display Engineering Hoseo University Asan31499 Korea Republic of Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai200072 China

ISBN: (纸本)9781713806301

We investigated the effects of solvents and concentration on the electro-optical performance of the organic light emitting diode (OLED) fabricated by the solution process. From the experimental results, we optimized the fabrication method of it and we figure out the underlying mechanism of carrier flow by the trap state. © 2019 ITE and SID.

关键词： Fabrication

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Hydrogen passivation for the performance enhancement of poly-Si crystallized by double-frequency YAG laser

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Optoelectronics Letters 2010年第4期6卷 288-290页

作者：李娟丁思维姚颖罗翀孟志国吴春亚熊绍珍张志林郭海诚 Tianjin Key Laboratory of Photo-electronic Thin Film Devices and Technology Key Laboratory of Opto-electronic Information Science and Technology(Nankai University and Tianjin University) Ministry of Education Institute of Photo-electronics Nankai University Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

The hydrogen passivation is adopted to enhance the performance of poly-Si crystallized by YAG laser annealing(LA polySi).The effects of passivation time,passivation power and passivation temperature on the hall mobility of the LA poly-Si are investigated and the mechanism of the hydrogen passivation is preliminarily *** is found that the effect of the hydrogen passivation on the qulity of YAG laser annealed poly-Si is also correlated with the deposition method and the defect type in it.

关键词： YAG激光器性能增强氢钝化结晶双频率聚硅激光退火多晶硅

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Simple and effective:Superlubricity behaviour of the G-quadruplex hydrogel with high selectivity for K^(+) ions based on the ocular environment

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Friction 2024年第11期12卷 2548-2562页

作者： Hongdong WANG Jian WU Kunpeng WANG Yunjuan SU Xiacong ZHANG Yuhong LIU Jianhua ZHANG School of Mechatronic Engineering and Automation and Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai UniversityShanghai 200444China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Department of Polymer Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

Hydrogels have been the subject of significant research in the field of friction due to their exceptional lubricating *** this study,the G-quadruplex hydrogel with high selectivity for K^(+) ions was formed by introducing a mixture of G,2-formylphenylboronic acid,and polyethylene glycol diamine into simulated artificial tears solution with high transparency,and an ultra-low coefficient of friction(COF)of about 0.004 was obtained based on the simulated ocular environment,thus achieving macroscopic *** friction pairs simulating the ocular environment,to assess the frictional performance of the G-quadruplex hydrogel as both a lubricant and a friction pair based on the simulated ocular environment,we conducted experiments considering various factors such as concentration,sliding speed,and *** these experiments,it was found that superlubricity was achieved when the G-quadruplex hydrogel was applied as lubricant or friction *** effect was attributed to the three-dimensional network structure and hydrophilicity of the hydrogel,which facilitated the formation of a highly bearing and flowing hydration layer,promoting macroscopic *** to the G-quadruplex hydrogel with low concentration,the high concentration hydrogel(75 mM)exhibited increased mechanical strength and robustness in *** with biocompatibility experiments,our synthesized G-quadruplex hydrogel has excellent biocompatibility and offers a novel approach to achieve superlubricity in ocular drug delivery.

关键词： superlubricity ocular environment G-quadruplex hydrogel bio-compatibility

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Aqueous Sr-doped In2O3 TFT stability under negative bias illumination stress

Aqueous Sr-doped In2O3 TFT stability under negative bias ill...

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International Conference on display Technology, ICDT 2019

作者： Zhou, Youhang Li, Jun Yang, Yaohua Li, Xifeng Zhang, Jianhua School of Material Science and Engineering Shanghai University Shanghai Jiading China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China

ISBN: (纸本)9781510896161

In this paper, the Sr-doped In2O3 thin film is fabricated by aqueous route and the stability of InSrO thin film transistor under negative bias illumination stress (NBIS) is investigated. It is found that Sr can effectively improve the stability of In2O3 TFTs under NBIS, which is due to the reduction of oxygen vacancies. The XPS measurement is tested to analyze the variation of oxygen vacancy concentration. The density of states is calculated to further confirm the decrease of total trap state caused by Sr doping. © 2019, John Wiley and Sons Inc. All rights reserved.

关键词： Thin film transistors

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Global optimization of process parameters for low-temperature SiN_(x) based on orthogonal experiments

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Advances in Manufacturing 2023年第2期11卷 181-190页

作者： Lian-Qiao Yang Chi Zhang Wen-Lei Li Guo-He Liu Jia-Qi Wu-Ma Jin-Qiang Liu Jian-Hua Zhang School of Materials Science and Engineering Shanghai UniversityShanghai200444People's Republic of China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072People's Republic of China Huawei Technologies Co. LtdShanghai200120People's Republic of China

Low-temperature silicon nitride(SiNx)films deposited by plasma-enhanced chemical vapor deposition(PECVD)have huge application potential in the flexible ***,the applicability of SiNx largely depends on the film’s general properties,including flexibility,deposition rate,residual stress,elastic modulus,fracture strain,dielectric constant,refraction index,*** optimization towards specific application by conventional experiment design needs lots of work due to the interaction of muti quality and process ***,an efficient global optimization approach for the process technology was proposed based on the Taguchi orthogonal experiment method considering muti-factor *** of all,the Taguchi orthogonal experiment design and analysis was used to rank the influences of main process parameters on the quality characteristics,including radio frequency(RF)power,pressure,silane flow rate,ammonia flow rate and nitrogen flow ***,the global optimization approach was carried out utilizing the multi-response optimizer considering the combination target of film formation rate,residual stress,dielectric constant,elastic modulus,fracture strain,refractive ***,the optimal solution of the SiNx film was finally obtained and verified.

关键词： Plasma-enhanced chemical vapor deposition(PECVD) Low-temperature silicon nitride(SiNx) Flexible display Taguchi orthogonal experiment Process optimization

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