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Temperature and bias voltage dependence of tunnel magnetoresistance effect in magnetic tunnel junctions with Co2Fe(Al,Si) electrodes fabricated by MBE

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Journal of Physics: Conference Series 2010年第5期200卷

作者： N Tezuka T Saito K Kikuchi A Sasaki F Mitsuhashi N Ikeda S Sugimoto T Takenaga Department of Materials Science Tohoku University Sendai Japan Advanced Technology R&D Center Mitsubishi Electric Corporation Amagasaki Japan

The temperature and bias voltage dependence of tunnel magnetoresistance ratio of two types of magnetic tunnel junctions were investigated. These two types of junctions have almost the same ordered structured Co2FeAl0.5Si0.5 Heusler bottom electrodes and different barrier layers of Al oxide or MgO, and top electrodes. A similar temperature dependence of tunnel magnetoresistance ratio measured at low bias voltage was found. A larger asymmetric bias voltage dependence of the tunnel magnetoresistance was obtained for the junction with Al oxide barrier compared with the junction with MgO barrier, and negative tunnel magnetoresistance ratio was also observed for both junctions.

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Optimal Command Generation for Flexible Mechanical Systems under Multiple Constraints

Optimal Command Generation for Flexible Mechanical Systems u...

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Joint 48th IEEE Conference on decision and Control and 28th Chinese Control Conference

作者： Takehiro Nishiyama Katsuhiko Yamada Shoji Yoshikawa the Advanced Technology R&D Center Mitsubishi Electric Corporation the Department of Aerospace Engineering Nagoya University

This paper presents a method for generating optimal command profiles for linear time-invariant mechanical systems with model *** generation for such systems should satisfy multiple conditions and constraints such as initial and final conditions,actuator limits,and residual vibration suppression after the *** had previously proposed a novel command-generation method for relatively simple dynamic systems and verified the method using single input *** the proposed method,the control input is represented as a linear superposition of triangle waves,and the problem is formulated as a linear programming *** this study,the proposed method is applied to more general linear time-invariant mechanical systems and verified using some benchmark problems,including a multi-input case.

关键词： Optimal Command Generation for Flexible Mechanical Systems under Multiple Constraints Command

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Integrated a-si circuit for capacitively coupled drive method in tft-lcds

Integrated a-si circuit for capacitively coupled drive metho...

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2009 Vehicles and Photons Symposium

作者： Ma, Jun Luo, Xixi Jung, Tae Bo Wu, Yong Ling, Zhihua Huang, Zhongshou Zeng, Wei Li, Yuesheng Advanced Technology Development R&D Center Shanghai Tianma Micro-Electronics Co. Ltd 889 Huiqing Rd. Pudong New Area Shanghai China Department of Materials Science Fudan University 220 Handan Road Shanghai China

A novel amorphous silicon driving circuitry, operated in Capacitively Coupled driving (CCd) method, is proposed and analyzed. By employing the circuitry for TFT-LCd gate and storage capacitor lines, line inversion driving mode can be realized with dC voltage on common electrode. With dC voltage on color filter common electrode, a capacitive touch panel is no longer suffered from driving pulse cross-talk in a conventional line inversion TFT-LCd. � 2009 SId.

关键词： Electrodes

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Ultimately Low Schottky Barrier Height at NiSi/Si Junction by Sulfur Implantation after Silicidation for Aggressive Scaling of MOSFETs

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MrS Online Proceedings Library 2009年第1期1155卷 1-5页

作者： Yen-Chu Yang Yoshifumi Nishi Atsuhiro Kinoshita Department of Materials Science and Engineering Stanford University CA USA Advanced LSI Technology Laboratory Corporate R&D Center Toshiba Corporation Yokohama Japan

We have obtained the Schottky barrier height (SBH) of 3.4meV for an electron at the interface of nickel-silicide (NiSi) and silicon (Si) interface using sulfur (S) implantation after silicidation (S-IAS) process followed by drive-in annealing process. This value of SBH is much smaller than those previously reported. The NiSi/Si interface morphology observed by TEM indicating well interfacial flatness and no degradation occurs by sulfur implantation. The secondary-ion-mass-spectroscopy (SIMS) analysis result showed that S diffusion was suppressed by S-IAS process, leading to such a small value of SBH. In addition, S-IAS process was applied to 50nm MOSFET and the parasitic resistance was effectively lowered.

关键词： dopant S nanoscale

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development of a thermal-hydraulics experimental system for high Tc superconductors cooled by liquid hydrogen

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Journal of Physics: Conference Series 2010年第3期234卷

作者： H Tatsumoto Y Shirai M Shiotsu K Hata H Kobayashi Y Naruo Y Inatani T Kato M Futakawa K Kinoshita J-PARC Center Japan Atomic Energy Agency Ibaraki 319-1195 Japan Department of Energy Science and Technology Kyoto University Kyoto 606-8501 Japan Institute of Advanced Energy Kyoto University Kyoto 606-8501 Japan Institute of Space and Astronautical Science JAXA Kanagawa 229-8510 Japan Energy Use R&D Center The Kansai Electric Power Co.Inc. Amagasaki 661-0974 Japan

A thermal-hydraulics experimental system of liquid hydrogen was developed in order to investigate the forced flow heat transfer characteristics in the various cooling channels for wide ranges of subcoolings, flow velocities, and pressures up to supercritical. A main tank is connected to a sub tank through a hydrogen transfer line with a control valve. A channel heater is located at one end of the transfer line in the main tank. Forced flow through the channel is produced by adjusting the pressure difference between the tanks and the valve opening. The mass flow rate is measured from the weight change of the main tank. For the explosion protection, electrical equipments are covered with a nitrogen gas blanket layer and a remote control system was established. The first cryogenic performance tests confirmed that the experimental system had satisfied with the required performances. The forced convection heat transfer characteristics was successfully measured at the pressure of 0.7 MPa for various flow velocities.

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Selective machining of organic thin film photovoltaic cell by a ultra-short pulse laser

Selective machining of organic thin film photovoltaic cell b...

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Conference on Lasers and Electro-Optics Europe (CLEO EUrOPE)

作者： Yoshiro Ito daisuke Miyata rie Tanabe Masahiro Ichihara Yoshiko Abe Eiichi Matsumoto Tetsuya Taima Yuji Yoshida Atsushi Masuda Department of Mechanical Engineering Nagaoka University of Technology Nagaoka Niigata Japan R&D Center Tokki Corporation Mitsuke Niigata Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki Japan

ISBN: (纸本)9781424440801

An organic thin film photovoltaic cell (OPV) consists of many thin layers of quite different materials: glass substrate, transparent electrode such like indium tin oxide (ITO), organic molecules such like copper phthalocyanine (CuPc), fullerene (C60) and metal (Me), etc. Unit structure of the OPV generates voltage less than 0.5V, and thus it is required to construct a module in which the units form a tandem series. The tandem structure preferably be formed 'in plane' rather than vertical stacking form.

关键词： Machining Transistors Photovoltaic cells Optical pulses Indium tin oxide Inorganic materials Optical materials Organic materials Glass Substrates

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Macroscopic generation of attosecond-pulse trains in strongly ionized media

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Physical review A 2009年第4期79卷 043828-043828页

作者： V. Tosa K. T. Kim C. H. Nam Department of Physics KAIST Yuseong-gu Daejeon 305-701 Korea National Institute for R&D of Isotopic and Molecular Technologies 400293 Cluj-Napoca Romania Advanced Photonics Research Institute and Center for Femto-Atto Science and Technology GIST Gwangju 500-712 Korea

The characteristics of attosecond-pulse trains (APT) obtained from high-order harmonics are investigated by using a nonadiabatic three-dimensional model. A time-dependent phase matching approach is used in order to analyze the macroscopic formation of the APT. Under high ionization conditions, the process of APT formation is found to be the result of an interlace among the driving laser field, single atom response, phase matching effects in the near field and burst interference in the far field.

关键词： Phase matching

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Analysis Method of Motion Accuracy Using NC System with Synchronized Measurement of Tool-Tip Position

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International Journal of Automation technology 2009年第4期3卷 394-400页

作者： Nagaoka, Kotaro Matsubara, Atsushi Fujita, Tomoya Sato, Tomonori Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-honmachi Hyogo Amagasaki661-8661 Japan Department of Micro Engineering Graduate School of Engineering Kyoto University Yoshida-honmachi Sakyo-ku Kyoto606-8501 Japan

This paper describes a method of measuring and an-alyzing the motion accuracy of NC machine tools. A practical method of measuring the motion accuracy is required for the achievement of high precision machining. The motion accuracy of NC machine tools becomes an issue, as motion error emerges while a continuous path control is applied. Error is caused by several factors. In order to determine the effects of each cause, it is necessary to measure the differences among reference positions, feedback positions, and tool tip positions. Thus, a system of measurement that achieves synchronized acquisition of each of the aforementioned positions has been developed. The system is composed of the NC system, which can manage the reference position and the feedback position, and an additional sensor data acquisition system, which receives the tool tip position. A method of analyzing the acquired data to determine the motion accuracy is also proposed. Experimental results show the effectiveness of the proposed method. © 2009. Fuji technology Press Ltd.

关键词： data acquisition

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Project report: Toward the realization of Highly reliable Embedded Systems

Project Report: Toward the Realization of Highly Reliable Em...

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International Symposium on Object-Oriented real-Time distributed Computing

作者： Takuya Katayama Tomoji Kishi Shintaro Hosoai Tatsuo Nakajima Taiichi Yuasa Midori Sugaya Tomoharu Ugawa Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Computer Science and Engineering Waseda University Tokyo Japan Graduate School of Informatics Kyoto University Kyoto Japan Dependable Embedded OS R&D Center Japan Science and Technology Agency Tokyo Japan Department of Computer Science University of Electro-Communications Tokyo Japan

ISBN: (纸本)9781424435715

Our society depend on embedded and ubiquitous computing and the reliability of embedded software becomes more and more important. We have conducted a five years project with industries to develop software for realizing highly reliable embedded systems. We have tackled reliability issues from the following aspects. (1)design environment: we have developed a UML design verification tool that apply model checking techniques to improve the design quality of application software. (2)Operating environment: we have developed operating system supports that realize multiple execution of real-time operating systems and also developed operating systems with enhanced resource management. Both technologies contribute the realization of robust run-time environment. (3) real-time environment: we have developed real-time garbage collection techniques for Jave. They prevent the suspension of applications that violates the correct behavior of real-time applications. Also, they reduce the effort of application programmers to avoid garbage-collection during important execution timing. We have obtained fruitful results from these three research themes, and some of them are actually used in industries. Furthermore, we have integrated the results to make synergetic effect of them. In order to demonstrate the effectiveness, we have conduct an experiment. In this paper, we introduce the project and its results.

关键词： Embedded system Operating systems Embedded software Ubiquitous computing Computer industry Unified modeling language Application software real time systems resource management robustness

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Gelation of Photonic Microdomain Structures Formed in Semi-dilute Solutions of Ultra-High-Molecular-Weight Polystyrene-b-Polybutadiene with Various Polybutadiene Contents

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IOP Conference Series: Materials Science and Engineering 2010年第1期14卷

作者： S Okamoto S Ito K Ando M Mouri A Ikeda H Hasegawa N Koshikawa Materials Science and Engineering Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 JAPAN ISS Advanced materials research and Application center Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 JAPAN To whom any correspondence should be addressed Photoproducts R&D Department Asahi KASEI E-materials Corp. 2-1 Samejima Fuji 416-8501 JAPAN Electronics Materials Division Asahi KASEI E-materials Corp. 2-1 Samejima Fuji 416-8501 JAPAN Department of Polymer Chemistry Graduate School of Engineering Kyoto University Kyoto-daigaku Katsura A3-014 Nishikyo-ku Kyoto 615-8530 JAPAN Space Environment Utilization Center Tsukuba Space Center Japan Aerospace Exploration Agency 2-1-1 Sengen Tsukuba-shi Ibaraki 305-8505 JAPAN

Well-ordered microdomain structures were obtained in semi-dilute solutions and successfully stabilized by gelation. We used polystyrene-b-polybutadiene (PS-b-PB) diblock copolymer with the weight-averaged molecular weight varying from several hundred thousands to millions g/mol. The solutions had iridescent colors because the domain spacing is on the order of the wavelength of visible light. As the structures are susceptible to distortion by flow or vibration, structural fixation was carried out by gelation. The polybutadiene used has the microstructure of 1,2-linkage and hence the chains can be cross-linkable. The Small-Angle X-ray Scattering and the UV-vis spectroscopic measurements showed that in the case of PS-b-PBs with the PB volume fraction, PB, greater than about 50 vol % the microdomain structures were successfully fixed by gelation, while largely distorted in the case of those with PB < ca. 50 vol %. The SAXS scattering intensities were quantitatively analyzed by the scattering functions numerically calculated based on the one- and two-dimensional paracrystal theories and on the concentration fluctuation between the polymers and the solvent molecules.

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