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International Conference on (ICEPT) Electronic Packaging Technology

作者： Zhaohui Ou Feng Lin Microelectronics Research & Development center Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Education Shanghai University Shanghai China

CMOS image sensor has experienced explosive growth in recent years. As increasing of number of pixel scale and complexities of circuit, testability of image sensor chip has become an important problem that must be dealt with by both design and test engineers. A systematic approach to handle testability of CMOS image sensor circuits is urgently needed, because current test methods less address this domain. In this paper, a uniform and systematic approach is explored to the testability problem of CMOS image sensor, and it covers the image sensor defect analysis, fault model definition and test system design. The experimental data shows the fault coverage can be up to 99.3%.

关键词： Pixel CMOS image sensors Image sensors Circuit faults system-on-a-chip Photodiodes Noise

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A Novel Monolithically Integrated Structure of GaN-based Micro-LED and its Driver HEMT

A Novel Monolithically Integrated Structure of GaN-based Mic...

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China International Forum o Solid State Lighting: International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS)

作者： Yuan An Kailin Ren Xueying Xiu Zebin Xu Zhuang Wu Luqiao Yin Jianhua Zhang School of Microelectronics Shanghai University Key Laboratory of Advanced Display and System Applications (Ministry of Education) Shanghai University Shanghai University Shanghai China

ISBN: (纸本)9781665495479

In this work, a novel LED-HEMT integrated device structure with a p-GaN cap layer under the drain electrode of HEMT and one or more InGaN layers inserted between AlGaN/GaN is proposed for the monolithic integration of GaN-based Micro-LED and its driver HEMT. This structure is a promising candidate for the optoelectronic switch in high-speed visible light communications owing to its elimination of metal-interconnects and reduction of parasitic capacitance. By TCAD simulations, the distribution of radiative recombination rate in this structure is investigated and the 2-D integrals of the radiative recombination rate for various device structure designs are compared. It is concluded that the integration structure with InGaN layers provides higher radiative recombination than that without InGaN layers. Device structure parameters are optimized, including Al content in AlGaN barrier layer, In content in InGaN layers, and thickness of InGaN layers.

关键词： Surface waves Photonic band gap Radiative recombination Switches HEMTs Wide band gap semiconductors Semiconductor process modeling

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Partial etched AlGaN layer on p-GaN HEMT with gate field plate and drain field plate for channel temperature reduction

Partial etched AlGaN layer on p-GaN HEMT with gate field pla...

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China International Forum o Solid State Lighting: International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS)

作者： Shuang Wu Luqiao Yin Kailin Ren Jianhua Zhang School of Microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai China

Self-heating effect of gallium nitride high electron mobility transistors (GaN HEMTs) has been a serious problem owing to their high-power and high-frequency operations, thus the method to optimize temperature was studied. In this work, the 2D temperature distribution model of p-GaN HEMT which has gate field plate and drain field plate is presented. Successively, etching AlGaN layer changes the two-dimensional electron gas (2DEG) density and the interface electric field between AlGaN layer and GaN buffer. The quantitative analysis of the etched region parameters which include etching length and etching depth were simulated systematically by using simulation software. The results show that etching AlGaN layer is helpful to reduce the peak temperature of active region and increase off-state breakdown voltage．

关键词： Temperature distribution Analytical models Thermal resistance HEMTs Logic gates Etching Wide band gap semiconductors

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Pure blue and white light electroluminescence in a multilayer organic light-emitting diode using a new blue emitter

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Chinese Physics B 2014年第7期23卷 727-731页

作者： Wei Na Guo Kun-Ping Zhou Peng-Chao Yu Jian-Ning Wei Bin Zhang Jian-Hua School of Materiais Science and EngineelJng Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai 200072 China

We characterized the 6,12-bis{[N-（3,4-dimethylphenyl）-N-（2,4,5-trimethylphenyl）]amino} chrysene （BmPAC）, which has been proven to be a blue fluorescent emission with high EL efficiency. The blue fluorescent device exhibits good performance with an external quantum efficiency of 5.8% and current efficiency of 8.9 cd/A, respectively. Using BmPAC, we also demonstrate a hybrid phosphorescence/fluorescence white organic light-emitting device （WOLED） with high efficiency of 36.3 cd/A. In order to improve the relative intensity of blue light, we plus a blue light-emitting layer （BEML） in front of the orange light emitting layer （YEML） to take advantage of the excess singlet excitons. With the new emitting layer of BEML/YEML/BEML, we demonstrate the fluorescence/phosphorescence/fluorescence WOLED exhibits good performance with a current efficiency of 47 cd/A and an enhanced relative intensity of blue light.

关键词：蓝色荧光有机发光二极管光致发光白色有机发光器件发光体 WOLED 甲基苯基外部量子效率

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Research on the Models of OLED-On-Silicon Pixel Circuits

Research on the Models of OLED-On-Silicon Pixel Circuits

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

作者： Li-min Yan Hao Wang Key Laboratory of Advanced Display & System Applications Ministry of Education Shanghai University Microelectronic Research and Development Center Shanghai University Shanghai China

In modern information society, the display devices play an important role. Presently, Organic Light-Emitting Diode (OLED) has been emphasized and regarded as one of the best technology for its many advantages, such as active-matrix driver mode, high brightness, fast response time, high efficiency, wide visual angle, thin and light-weight etc. Much work of this paper has been done in AM-OLED technology, mainly focusing on the models of AM-OLED pixel circuit structure design and parameters assurance, AC-driving pixel circuit design and application. This research is prepared for integrated peripheral driving circuit design and application in the future.

关键词： Organic light emitting diodes Flat panel displays Thin film transistors Light emitting diodes Active matrix technology Brightness Threshold voltage Circuit synthesis Liquid crystal displays Active matrix organic light emitting diodes

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Improved stability of blue TADF organic electroluminescent diodes via OXD-7 based mixed host

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Frontiers of Optoelectronics 2021年第4期14卷 491-498页

作者： Weiguang LI Jie TANG Yanqiong ZHENG Junbiao PENG Jianhua ZHANG Bin WEI Xifeng LI Key Laboratory of Advanced Display and System Applications of Ministry of Education School of Mechatronic Engineering and AutomationShanghai UniversityShanghai 200072China School of Materials Science and Engineering Shanghai UniversityShanghai 200072China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China

Thermally activated delayed fluorescence(TADF)organic light-emitting diodes(OLEDs)have been demonstrated in applications such as displays and solid-state ***,weak stability and ineffi-cient emission of blue TADF OLEDs are two key bottlenecks limiting the development of solution processable displays and white light *** work presents a solution-processed OLED using a blue-emitting TADF small molecule bis[4-(9,9-dimethyl-9,10-dihydroacridine)phenyl]sulfone(DMAC-DPS)as an *** comparatively investigated the effects of single host poly(Nvinylcarbazole)(PVK)and a co-host of 60%PVK and 30%2,2′-(1,3-phenylene)-bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole](OXD-7)on the device performance(the last 10%is emitter DMAC-DPS).The co-host device shows lower turn-on voltage,similar maximum luminance,and much slower external quantum efficiency(EQE)*** other words,device stability improved by doping OXD-7 into PVK,and the device impedance simultaneously and significantly reduced from 8.6103 to 4.2103 W at 1000 ***,the electroluminescent stability of the co-host device was significantly enhanced by adjusting the annealing temperature.

关键词： blue thermally activated delayed fluorescence organic light-emitting diode(TADF OLED) 2 2′-(1 3-phenylene)-bis[5-(4-tert-butylphenyl)-1 3 4-oxadiazole](OXD-7) bis[4-(9 9-dimethyl-9 10-dihydroacridine)phenyl]sulfone(DMAC-DPS) stability

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Design and implementation of CNC machine remote monitoring and controlling system based on embedded Internet

Design and implementation of CNC machine remote monitoring a...

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作者： Zhai, Wen-Zheng Hu, Yue-Li School of Mathematics and Information Engineering Taizhou University Taizhou 300070 China School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769542126

The network control of CNC machine is the inexorable development trend of modern manufacturing industry, and the combination of embedded technology with network has become a research hot. This paper puts forward a novel design idea of remote monitoring and controlling system of CNC machine based on embedded Internet, presents its architecture principle design and software-hardware implementation procedure of the whole system. On the basis of embedded ARM Cortex-M0 microprocessor LPC1114, Ethernet controller ENC28J60, ported μC/OS-II and LwIP, an embedded Ethernet communication module is constructed to facilitate the communication between the upper industrial control PC, the field monitoring host and the various CNC machine Tools. After the hardware architecture design and software programming are completed, the system is tested and the results indicate that NC-RMCS functions have been realized. Also, the network control technology is practical and has higher application value. © 2010 IEEE.

关键词： Machine tools

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systematic studies on scan and driving model for flat panel display

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Journal of Shanghai University(English Edition) 2011年第4期15卷 279-286页

作者：徐美华冉峰陈章进翁世浩 School of Mechatronics Engineering and Automation Shanghai University Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of EducationShanghai 200072P.R.China Micro-electronic Research and Development Center Shanghai University

Aiming at the time redundancy in the fiat panel display （FPD） imaging process, the paper studied some problems for FPD gray scale controlling based on the fraetal theory, dissertates the construction of the space-time mapping topology architecture, the proposition of optimal scanning structure for FPD＇s gray imaging, and the creation of the fractal theoretic model. Then the logic implementation and system application are presented based on the fraetal model of the optimal scan architecture, and the application results achieved target of eliminating time redundancy and increasing the scanning availability. The novel control mode that the fractal scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system.

关键词： fiat panel display （FPD） space-time mapping optimal scan architecture fractal model logic implementation IP core

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Modeling of heat transfer performance for an array of micro jets impinging upon dimpled surface

Modeling of heat transfer performance for an array of micro ...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Tian-yi Geng Jing-yu Fan Yan Zhang Shun Wang Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai University Shanghai China

The present paper paid particular attention to the flow and heat transfer performance for an array of micro jets impinging upon the dimpled surface by means of CFD modeling. The modeling of a three-by-four jet array impinging upon the smooth, concave- and convex-dimpled surfaces was carried out based on the solution of the steady, incompressible and three-dimensional RANS and energy equations by employing the RNG k-epsiv turbulence model. It has been demonstrated from the present study that the heat transfer performance for an array of the micro jets impinging onto the concave- or convex-dimpled surfaces tends to be somewhat attenuated or augmented in the impingement region, respectively, as compared with that onto the smooth one. And the variational trend with respect to the Nusselt number distribution in the inter-jet region appears to be inconsistent with that in the impingement region. In addition, the flow pattern and primary mechanism by which the smooth, concave- and convex-dimpled surfaces significantly affect the flow field and heat transfer are analyzed and discussed.

关键词： Heat transfer Heat sinks Rough surfaces Surface roughness Microstructure Microchannel Temperature Thermal stresses Electronics cooling Geometry

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A blue organic light emitting diodes with graded junction for hole injection and a step barrier for electron injection

A blue organic light emitting diodes with graded junction fo...

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作者： Jiang, Xue-Yin Zhang, Zhi-Lin Zhu, Wen-Qing Xu, Shao-Hong Department of Materials Science Shanghai University Jiading Shanghai 201800 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9787561752289

Compared to the conventional hetero-junction OLED (Cell-HJ), a blue OLED with a graded junction in the interface between hole transporting layer (HTL) and emitted layer (EML) exhibited low drive voltage and significantly improved stability, however loss of efficiency. In order to redeem the decrease in efficiency, a step barrier for electron injection was proposed. The device with a graded junction in side of anode and a step barrier in the side of cathode showed high stability and improved efficiency. By studying Hole-only devices with graded junction and hetero-junction, electron-only cell with a step barrier, the enhancement of stability and improvement of efficiency have been explained.

关键词： Electron injection

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