Kazuo Yamamoto

Chubu University

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Akihiro Ametani

Doshisha University

Shozo Sekioka

Shonan Institute of Technology

Shunichi Yanagawa

Taiyo Yuden (Japan)

Shigeru Yokoyama

Kanazawa University

K. Yamada

Electronic Navigation Research Institute

Naruto Yonemoto

Electronic Navigation Research Institute

M. Okamura

Brookhaven National Laboratory

H. Kashiwagi

National Institutes for Quantum and Radiological Science and Technology

Shinichi Sumi

Chubu University

T. Hattori

Olympus (Japan)

Cooperative Institutions

National and Kapodistrian University of Athens

165

Fermi National Accelerator Laboratory

153

University of California, Los Angeles

143

Institute of High Energy Physics

139

European Organization for Nuclear Research

135

A. Alikhanyan National Laboratory

129

Argonne National Laboratory

125

University of Adelaide

103

Institute for High Energy Physics

Children's Defense Fund

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Defect performance of a 2X node resist with a revolutionary point-of-use filter

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2010)

Jennifer Braggin Raul Ramirez Aiwen Wu Won Ryeol Choi I. Funahshi

In today's competitive lithography market, resist manufacturers are always striving to create a product to meet lithographic challenges while maintaining a low inherent defect level. While bulk filtration used in resist manufacturing removes a majority of the inherent defectivity, point-of-use filtration is still required to ensure that defects are not passed from the bottle to the wafer. As Moore's law drives lithographers to ever decreasing dimensions, resist manufacturers must find new ways of filtering their chemistries to make sure that the smallest defects cannot create the biggest yield detractors. In addition, IDMs must use new innovations to explore point-of-use filtration techniques to protect their valuable patterns. This paper will show the conditions that can reduce defectivity in an immersion lithography scheme. More specifically, advanced point-of-use filtration techniques, including revolutionary filter membrane technology and advanced filtration settings, will be explored to understand potential 22nm node defect performance. By thinking ahead about the filtration needs of the future, resist manufacturers, IDMs, and equipment manufacturers can all work toward an understanding of the complex nature of filtration, ultimately yielding a new, low defectivity regime at the smallest pattern sizes.

Filtration (mathematics)

Immersion lithography

10.1117/12.859280

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Verifications of transient grounding impedance measurements of a wind turbine generator system using the FDTD method

Kazuo Yamamoto Shunichi Yanagawa Takeshi Ueda

Most of the breakdowns and malfunctions of the electrical and control systems inside or in the vicinity of a wind turbine due to lightning are caused by a rise in ground potential. To solve those problems, the field tests have been carried out, and the transient characteristics of an actual wind turbine grounding system have been obvious. This paper describes the verifications of field tests of wind turbine grounding characteristics by using the Finite Difference Time Domain method.

Transient (computer programming)

Lightning

Earthing system

10.1109/sipda.2011.6088414

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Citations (10)

電気自動車とその検証その2に及ぼす高電圧インパルス実験【Powered by NICT】

IEEE Conference Proceedings (2016)

Yuta Naito Kazuo Yamamoto Yanagawa Shunichi

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The interference suppression antenna for the near-field monitor of category III ILS

Electronics and Communications in Japan (Part I Communications) (1997)

Agus Hartanto Kazuo Yamamoto Hisashi Yokoyama Tsutomu Suzuki

It is well known that the ILS Localizer (LLZ) course may be deviated by aircraft passing above the LLZ antenna. The course deviation is observed not only by other aircraft approaching to a runway but also by the ILS monitor. This phenomenon may cause an alarm in the ILS monitor and halt category III LLZ operation, because the tolerance for unexplained course deviation and its duration is tighter in category III LLZ than in other categories. In this paper, a new antenna (the interference suppression antenna) for the near field monitor (NFM) is proposed that can suppress unnecessary alarms generated by this phenomenon. First, the LLZ course deviation and its duration as observed by the NFM due to passing aircraft above the LLZ are analyzed. Next, the course deviation is calculated when the interference suppression antenna, which consists of an end-fire array antenna and a broadside array, is used. The relationship between the aircraft location, the course deviation, and its duration period as received by the NFM is determined. When this new antenna is used, the course deviation at the NFM and its duration can be reduced substantially from those obtained by the conventional antenna. © 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 1, 80(7): 51–60, 1997

Course (navigation)

False alarm

10.1002/(sici)1520-6424(199707)80:7<51::aid-ecja6>3.0.co;2-8

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A measurement of Transient Grounding Characteristics of a Wind Turbine Generator System Part 2

電気学会研究会資料. HV, 高電圧研究会 (2013)

Shunichi Yanagawa Tomoki Kawabata Kazuo Yamamoto

Transient (computer programming)

Wind generator

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An Optimum Adoption of Iterative Methods for Nonlinear Simulations on EMTP-Type Simulators

奈良工業高等専門学校研究紀要 (2001)

Kazuo Yamamoto

This paper adopts a combined iterative method ( CIM ) as a basis of a transient calculation for nonlinear circuits. CIM consists of a modified predictor corrector iteration (MPCI) and Newton-Raphson iteration (NRI) algorithms, and a parallel connection of a piecewise linear conductance and a nonlinear current source for MPCI and a parallel connection of a nonlinear conductance and a nonlinear current source for NRI. It is important to define an adoption of iterative methods in CIM, because a solution obit depends on the multi-dimensional plane between an initial and real solutions. This paper presents an optimum adoption of iterative methods MPCI and NRI which are basis of CIM for nonlinear simulations, an effective construction of MPCI and Jacobian matrices based on a multi-dimensional solution with Dommel’s method and an effective expression of MPCI and NRI on EMTP-Type simulators. This paper also demonstrates the proposed algorithm on an example system, and compares the result obtained with a basic nodal conductance approach (NCA). The results prove the validity of those proposed methods for any kinds of EMTP-Type simulators with nonlinear elements

Emtp

Basis (linear algebra)

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Small-Diameter Rogowski Coil and Integrator for Wide-Band Current Sensor

Hiroyasu Watanabe Kazuo Yamamoto Issei Nomura Shinichi Sumi Takanori Wada

Current waveforms can effectively be measured using a Rogowski coil. To accurately measure a current waveform, the wide-band frequency characteristics of a current sensor composed of a Rogowski coil and an integration circuit are required. Wide-band current sensors are usually expensive. Therefore, a low-cost and wide-band sensor with high accuracy is needed. The developed wide-band current sensor using a small-diameter Rogowski coil is connected to an oscilloscope, and the current waveform can be measured. The design and manufacturing methods and the evaluation results of the frequency characteristic are introduced in this paper.

Current sensor

10.1109/apl.2019.8816010

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Introduction to the Fourth ENRI International Workshop on ATM/CNS (EIWAC 2015)

Lecture notes in electrical engineering (2017)

Kazuo Yamamoto

Harmonization

10.1007/978-4-431-56423-2_1

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Citations (1)

配水系への逆流雷電流に影響する風力タービンの過渡接地特性【Powered by NICT】

IEEE Conference Proceedings (2016)

Kazuo Yamamoto Kubo Yuki Sumi Shinichi

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Confined Hot Electron Relaxation at the Molecular Heterointerface of the Size-Selected Plasmonic Noble Metal Nanocluster and Layered C₆₀

ACS Nano (2021)

Masahiro Shibuta Kazuo Yamamoto Tsutomu Ohta Tomoya Inoue Kaito Mizoguchi

The plasmonic response of metallic nanostructures plays a key role in amplifying photocatalytic and photoelectric conversion. Since the plasmonic behavior of noble metal nanoparticles is known to generate energetic charge carriers such as hot electrons, it is expected that the hot electrons can enhance conversion efficiency if they are transferred into a neighboring molecule or semiconductor. However, the method of transferring the energized charge carriers from the plasmonically generated hot electrons to the neighboring species remains controversial. Herein, we fabricated a molecularly well-defined heterointerface between the size-selected plasmonic noble-metal nanoclusters (NCs) of Agn (n = 3–55)/Aun (n = 21) and the organic C60 film to investigate hot electron generation and relaxation dynamics using time-resolved two-photon photoemission (2PPE) spectroscopy. By tuning the NC size and the polarization of the femtosecond excitation photons, the plasmonic behavior is characterized by 2PPE intensity enhancement by 10–100 times magnitude, which emerge at n ≥ 9 for Agn NCs. The 2PPE spectra exhibit contributions from low-energy electrons forming coherent plasmonic currents and hot electrons with an excitation energy up to photon energy owing to two-photon excitation of an occupied state of the Agn NC below the Fermi level. The time-resolved pump–probe measurements demonstrate that plasmon dephasing generates hot electrons which undergo electron–electron scattering. However, no photoemission occurs via the charge transfer state forming Agn+C60– located in the vicinity of the Fermi level. Thus, this study reveals the mechanism of ultrafast confined hot electron relaxation within plasmonic Agn NCs at the molecular heterointerface.

Nanoclusters

Dephasing

Charge carrier

10.1021/acsnano.0c08248

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Citations (22)