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23rd International Congress of Theoretical and Applied Mechanics

作者： Yan Zhang Jingyu Fan SMIT Center Key Laboratory of Advanced Display and System ApplicationsMinistry of Education & School of Mechatronics Engineering and AutomationShanghai University Shanghai Institute of Applied Mathematics and Mechanics Shanghai University

Micro-cooler has been considered as one of the promising cooling schemes for high-powered electronic ***-pin-fin made of carbon nanotube(CNT) is a potential micro-cooler for on-chip thermal management,and its localized heat removal capability can be further improved by combining air jet impingement. In this paper,the reliability of CNT micro-pin-fin cooler

关键词： CNT Mechanical and thermal performances of CNT micro-pinfin cooler with air jet impingement

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Zinc Oxide Thin Film Transistors Fabricated by R.F. Magnetron Sputtering Using a Compact Powder Target

Zinc Oxide Thin Film Transistors Fabricated by R.F. Magnetro...

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2012中国平板显示学术会议

作者： Mingtong Lin Wenqing Zhu The Joint Laboratory of Flat Panel Display Engineering of Shanghai University and SVA Electron Co.Lt Key Laboratory for Advanced Displays and System Applications of Ministry of Education Shanghai Univ

A lot of work has focused on the development of zinc oxide thin film for the active layer for thin film transistors in recent years. In present article, the active layers for zinc oxide thin film transistors were first time prepared by r.f. Magnetron sputtering using a simply compacted 3-inch-diameter zinc oxide powder target, and the deposition parameters including O2/(Ar+O2) ratio, gas pressure and r.f. Power were carefully optimized. Thousands of zinc oxide thin film transistors with staggered-type or inverse staggered-type stack and various W/L ratios were fabricated and electrically characterized. A better result we achieved with normally-off TFT characteristics presents a saturated mobility of 25.7 cm2/Vs, a threshold voltage of 6.3 V, an on/off current ratio over 7.7×104 an off current less than 7.9×10-10 and a subthreshold slope of 1.2 V/dec. The TFT characteristics results can compete with those for the TFTs manufactured from high-temperature sintered ceramic target reported in literature thus far.

关键词： ZnO thin film transistor powder target r.f.magnetron sputtering electrical characterization deposition parameters optimization

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Room temperature transfer of carbon nanotubes on flexible substrate

Room temperature transfer of carbon nanotubes on flexible su...

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International Workshop on Thermal Investigation of ICs and systems (THERMINIC)

作者： Di Jiang Yifeng Fu Yan Zhang Johan Liu Department of Microtechnology and Nanoscience Chalmers University of Technology Göteborg Sweden SHT Smart High-Tech AB Gothenburg Sweden Key Laboratory of Advanced Display and System Applications & SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai China Göteborg Sweden

In this paper we report a novel method of transferring thermally grown vertically aligned carbon nanotubes (VA-CNTs) onto flexible substrates at room temperature with a single-step process. The transfer process is carried out by placing the CNT forests upside down on a double sided thermal release adhesive tape and peeling off the silicon substrate. Scanning electron microscope (SEM) is used to observe the transfer results. Also a second transfer using the same method but a thermal tape with higher release temperature is repeated on the as-transferred CNTs forests. The results show that this method is able to provide a novel process for transferring CNT forests at room temperature. This process will help to bring close the low cost fabrication of vertically aligned CNT structures for electronics.

关键词： Carbon nanotubes Substrates Plastics Silicon Physics Arrays

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A new two-phase fluid dispensing technology for the adhesive distribution

A new two-phase fluid dispensing technology for the adhesive...

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2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011

作者： Peng, Peng Zhang, Jianhua Zhang, Jinsong School of Mechatronics Engineering and Automation Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai China

ISBN: (纸本)9781424481149

The fluid dispensing with a controllable method is one of the key technologies in electronic packaging. The the higher accuracy and consistency boosts the emergence of the new fluid dispensing technologies. This paper first adopted the two-phase fluid principle for the fluid dispensing technology and designed and fabricated the unique dispenser prototype. The slug flow was a stable flow type in the two-phase fluid with an intermittent bubbles and droplets. To control the flow parameters of the two fluids which were the compressed gas and adhesive, it performed an intermittent and a persistent fluid dispensing process. The accurate and uniform droplets without satellite points had the same volume and mass were 660.6nL and 766μg, while the adhesive, compressed gas and electromagnetic valve had a flow rate for 1.4mL/min, a pressure for 80KPa and a frequency for 8Hz, respectively. As the gas pressure dropped down to 60KPa and the adhesive flow rate was 2.0mL/min, the adhesive dispensed to the substrate in a stream mode with a width for 2.3mm. © 2011 IEEE.

关键词： Drops

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Compressed sensing based channel estimation using group random unit pilot for OFDM systems in fast moving environment~

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High Technology Letters 2011年第2期17卷 113-118页

作者：方勇 Zhou Xiaoping Wang Min School of Communication and Information Engineering Key laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai 200072 P. R. China Key Laboratory of Advanced Display and System Applications Shanghai 200072 P. R. China

A compressed sensing （CS） based channel estimation algorithm is proposed in the fast moving environment. A sparse basis expansion channel model in both time and frequency domain is *** are placed according to a novel random unit pilot matrix （RUPM） to measure the delay- Doppler sparse channel. The sparse channels are recovered by an extension group orthogonal matching pursuit （GOMP） algorithm, enjoying the diversity gain from multi-symbol processing. The relatively nonzero channel coefficients are estimated from a very limited number of pilots at a sampling rate significantly below the Nyquist rate. The simulation results show that the new channel estimator can provide a considerable performance improvement for the fast fading channels. Three significant reductions are achieved in the required number of pilots, memory requirements and computational complexity.

关键词： compressed sensing （ CS） channel estimation fast fading sparse channel basis expansion

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Voltage regulator architecture used in automotive electronics

Voltage regulator architecture used in automotive electronic...

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International Conference on Measuring Technology and Mechatronics Automation

作者： Hu, Yueli Yang, Kai Jiang, Yuxi Key Laboratory of Advanced Display and System Applications Shanghai University Shanghai 200072 China School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769542966

In modern electronic devices, linear regulator is increasingly important. Modules in a system may require different supply voltages, and the system always has only one supply. So a regulator will be needed. This paper describes a voltage regulator which can solve the problem above. Different types of vehicles has different battery voltage, the regulator described in this paper can convert the input voltage with a big range (10v-40v) to 3.3v. The output can supply other modules in a system of automotive electronics. The experimental results show that all main expectations are achieved. © 2011 IEEE.

关键词： Voltage regulators

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Laser Bonding system for Semiconductor Device and MEMS Encapsulation

Laser Bonding System for Semiconductor Device and MEMS Encap...

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2011 12th International Conference on Electronic Packaging Technology & High Density Packaging(2011 电子封装技术与高密度封装国际会议)

作者： Yuneng Lai Jianhua Zhang Yuanhao Huang Maoyu Li Zunmiao Chen Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Educat Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Educat

A semi-automatic laser bonding system is developed to provide a localized heating manner for semiconductor device and MEMS encapsulation, especially for devices which have thermal-sensitive materials inside. This system consists of five modules, including laser module, motion module, fixture module, monitoring module and control module. Several bonding tests are carried out using this system with different sets of system parameters, including laser power, laser beam radius and laser moving velocity. Good bonding results are achieved with proper combinations of the system parameters, which also certifies this system is workable.

关键词： Laser beams Power lasers Bonding Semiconductor lasers Glass Laser modes Encapsulation

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Building an AMBA AHB compliant memory controller

Building an AMBA AHB compliant memory controller

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International Conference on Measuring Technology and Mechatronics Automation

作者： Hu, Yueli Yang, Ben Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China College of Mechanical and Electronic Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769542966

Microprocessor performance has improved rapidly these years. In contrast, memory latencies and bandwidths have improved little. The result is that the memory access time has been a bottleneck which limits the system performance. Memory controller (MC) is designed and built to attacking this problem. The memory controller is the part of the system that, well, controls the memory. The memory controller is normally integrated into the system chipset. This paper shows how to build an advanced Microcontroller Bus Architecture (AMBA) compliant MC as an advanced High-performance Bus (AHB) slave. The MC is designed for system memory control with the main memory consisting of SRAM and ROM. Additionally, the problems met in the design process are discussed and the solutions are given in the paper.

关键词： Buses

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High-performance thin film encapsulation for the application of white organic light-emitting diodes

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作者： Liao, Yingjie Liu, Jizhong Zhang, Yong Li, Long Yu, Fangfang Wei, Bin Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai 200072 China School of Mechanical and Electronic Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)0878492119

Color conversion method has been used to fabricate chromatic-stability white organic light-emitting diodes (OLEDs). Experimental results found little CIE coordinate migration while changing operation voltage from 5 V to 12 V. A simple thin-film encapsulation (TFE) structure has been developed through vacuum thermal deposition in combination with plasma enhanced chemical vapor deposition. The luminance of the encapsulated white OLED remain unchanged during the test time. The novel approach is being expected to lower the cost and achieve high-performance TFE. © (2011) Trans Tech Publications.

关键词： Plasma enhanced chemical vapor deposition

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Study into the Application of Single-Wall Carbon Nanotubes in Isotropic Conductive Adhesives

Study into the Application of Single-Wall Carbon Nanotubes i...

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2011 12th International Conference on Electronic Packaging Technology & High Density Packaging(2011 电子封装技术与高密度封装国际会议)

作者： Dongsheng Li Qiong Fan Yajun Duan Huiwang Cui Zhichao Yuan Lilei Ye Johan Liu Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center S Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center S Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center S SHT Smart High Tech AB Fysikgrand 3 41296 Gothenburg SWEDEN Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center S

Isotropic conductive adhesives (ICAs) with stable contact resistance and high thermal conductivity are highly desirable. In this paper, a new ICA filled with silver fillers and singlewall carbon nanotubes (SCNTs) was developed. SCNTs were acidified in a mixture of 98% H2SO4 and 68% HNO3 with a volume rate of 3:1 at 50 0C for 3 h. Carboxyl and hydroxyl groups were produced on SCNTs, and the purity of SCNTs also greatly improved. To prepare the ICAs, acidified SCNTs were firstly ultrasonically dispersed in acetone, then added into the matrix resin, and finally mixed with silver fillers. The bulk resistivity of the fabricated ICAs filled with silver fillers and acidified SCNTs was larger, their lap shear strength lower, their contact resistance stability improved, and their moisture absorption remained almost unchanged. In the curing process, the released heat was greatly reduced and transferred to the surroundings for good thermal conductivity of SCNTs, but the curing temperature was not affected. Therefore, acidified SCNTs can be used in ICAs, and in general, will create a good effect on ICAs.

关键词： Silver Conductivity Curing Contact resistance Absorption Moisture Mechanical factors

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