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SSrN 2024年

作者： Choi, Yun-Il Hwang, Eun-Hye Lee, Sanga Smart Mobility Materials and Components R&D Group Korea Institute of Industrial Technology 34 Haeryongsandan 2-ro Haeryong-myeon Jeollanam-do Suncheon Korea Republic of Digital Transformation R&D Department Korea Institute of Industrial Technology 143 Hanggaul-ro Sangnok-gu Gyeonggi-do Ansan Korea Republic of

This study examines how flow velocity affects the current response due to erosion damage in a polyurethane, CNT, and rGO nanocomposite. Increased nano-filler content improved conductivity, transitioning the material from an insulator to a conductor. Erosion tests in a NaCl solution with sand showed higher flow velocities caused more surface damage. The current slope closely correlated with flow velocity. An ensemble model using current density slope data, including SVr, achieved high prediction accuracy with r2 values around 0.93 for both increasing and decreasing velocities. © 2024, The Authors. All rights reserved.

关键词： Wind power

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development of an Inspection Method for Electrical Leakage Tailored to Target defect 39

Development of an Inspection Method for Electrical Leakage T...

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Metrology, Inspection, and Process Control XXXIX 2025

作者： Youn, Sangyeon Shin, Kwangil Nam, Gwang-Hyeon Woo, Wonjo Yoon, Kwanhee Shin, Seunghyun Oh, Jiwon Kim, Jong Chul Jeong, Yongdeok Sohn, Younghoon Yoo, Hyung Keun Metrology & Inspection Technology Team Common Technology Center DS Samsung Electronics 1 Samsungjeonja-ro Gyeonggi-do Hwaseong-si17786 Korea Republic of Process Development Team R&D Center DS Samsung Electronics 114 Samsung-ro Godeok-myeon Gyeonggi-do Pyeongtaek-si17786 Korea Republic of Analysis Science & Engineering Team Common Technology Center DS Samsung Electronics 1 Samsungjeonja-ro Gyeonggi-do Hwaseong-si17786 Korea Republic of Technology Development Foundry Division DS Samsung Electronics 1 Samsungjeonja-ro Gyeonggi-do Hwaseong-si17786 Korea Republic of

ISBN: (纸本)9781510686380

As semiconductor performance design patterns advance, internal electrical defects more have attracted interest rather than surface defects. Consequently, in-line Voltage Contrast (VC) inspection utilizing Scanning Electron Microscopy (SEM) plays pivotal role to detect the flow of electrons in internal circuit. Nevertheless, VC inspection faces challenges including inadequate coverage and the charging effect, which diminishes detection capability by accumulating electrons in nearby internal structure. Specifically, it poses a significant obstacle in detecting gate leakage and abnormal current leakage in NMOS, representing device characteristics and potentially leading to malfunction. This paper proposes using Point Vector Scanning (PVS), which targets specific points instead of scanning the entire surface. This paper introduces a facility operation method optimized for target defects that can maximize productivity using PVS. In addition, the charging effect, which is a disadvantage of the existing rS, has been improved, and the higher BVC detection ability has been confirmed through failure analysis in high volume manufacturing. Additionally, by analyzing gray levels characterized by specific patterns and device characteristics, we suggests the potential for becoming a pivotal method for quantifying electrical characteristics under GAA manufacturing process. © 2025 SPIE.

关键词： Leak detection

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Effect of microstructure and deformation on hardness distribution of wrought precipitation strengthened ni-based alloy after creep damage

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Zairyo/Journal of the Society of materials Science, Japan 2021年第3期70卷 258-263页

作者： Oinuma, Shun Takaku, reki Nakatani, Yujiro Takeyama, Masao Energy Systems R&D Center Toshiba Energy Systems & Solutions Corporation Tsurumi-ku Yokohama230-0045 Japan School of Materials and Chemical Technology Tokyo Institute of Technology Meguro-ku Tokyo152-8550 Japan

To establish the creep life assessment method for wrought precipitation strengthened Ni-based alloys, the factors which influence the hardness after creep damage were studied. Hardness measurements and microstructure quantification were done for crept specimen of γ'-Ni3Al precipitation strengthened alloy, TOS1X-2. Hardness increased with EBSd KAM and GAM value of measured location, suggesting the hardening by creep induced strains. Grain boundary and twin boundary were found to suppress the plastic deformation by hardness indent. Grains oriented to the stress axis showed high hardness, while grains oriented showed relatively low. This indicated the possible existence of orientation dependence of strain hardening, which might be explained by the number of slip systems likely to operate and the interactions of dislocation movement. The hardness seemed to be influenced by the γ' phase precipitation strengthening, plastic deformation resistance by grain boundary and strain hardening for each grain orientations. © 2020 The Society of materials Science, Japan.

关键词： Hardness

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Pulse‑Charging Energy Storage for Triboelectric Nanogenerator Based on Frequency Modulation

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Nano-Micro Letters 2025年第9期17卷 139-151页

作者： Kwon‑Hyung Lee Min‑Gyun Kim Woosuk Kang Hyun‑Moon Park Youngmin Cho Jeongsoo Hong Tae‑Hee Kim Seung‑Hyeok Kim Seok‑Kyu Cho donghyeon Kang Sang‑Woo Kim Changshin Jo Sang‑Young Lee Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Republic of Korea Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research(KIER)Ulsan 44776Republic of Korea Department of Battery Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Research and Development Center Energy-Mining LTDSuwon 16226Republic of Korea Department of Chemical Engineering POSTECHPohang 37673Republic of Korea Department of Battery and Chemical Engineering Hanyang University ERICAGyeonggi 15588Repubilc of Korea UBATT Inc Daejeon 34036Republic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoul 03722Republic of Korea Center for Human‑Oriented Triboelectric Energy Harvesting Yonsei UniversitySeoul 03722Republic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03772Republic of Korea Department of Battery Engineering Yonsei University50Yonsei‑RoSeodaemun‑GuSeoul 03722Republic of Korea

Energy harvesting storage hybrid devices have garnered considerable attention as self-rechargeable power sources for wireless and ubiquitous *** nanogenerators(TENGs),a common type of energy harvester,generate alternating current-based,irregular short pulses,posing a challenge for storing the generated electrical energy in energy storage systems that typically operate with direct current(dC)-based low-frequency *** this study,we propose a new strategy that leverages high-frequency response to develop efficient chargeable TENG-supercapacitor(SC)hybrid devices.A highfrequency SC was fabricated using hollow-structured MXene electrode materials,resulting in a twofold increase in the charging efficiency of the hybrid device compared to a control SC made with conventional carbon electrode *** a systematic understanding,the electrochemical interplay between the TENGs and SCs was investigated as a function of the frequency characteristics of SCs(f_(SC))and the output pulse duration of TENGs(Δt_(TENG)).Increasing the fSC·Δt_(TENG) enhanced the charging efficiency of the TENG-SC hybrid *** study highlights the importance of frequency response design in developing efficient chargeable TENG-SC hybrid devices.

关键词： Energy harvesting storage hybrids Triboelectric nanogenerators Supercapacitors Frequency response MXene

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residue super-resolution convolutional neural network based complexity reduction for H.266 VVC intra-coding

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ICT Express 2025年第3期11卷 460-466页

作者： dhanalakshmi, A. Balaji, L. raja, C. Giri, Jayant Alrashoud, Mubarak Department of ECE Panimalar Engineering College Chennai India Department of ECE Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai India Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur India Division of Research and Development Lovely Professional University Phagwara India Chair of Smart Technologies College of Computer and Information Sciences King Saud University Riyadh Saudi Arabia

Versatile Video Coding (VVC) promised to provide the same video quality as HEVC with 50 % bitrate reduction, which was introduced in 2020. Our suggested method for VVC Intra-coding is residue super-resolution convolutional neural network (rSr-CNN) utilizing downsampling and upsampling procedures. We present an effective complexity reduced VVC intra-coding scheme based on residue Sr-CNN. reducing an original video's resolution in both the vertical and horizontal directions is all that is required to execute down sampling. Increasing the video dimensions for improved visual quality, convolutional neural networks are utilized in the upsampling process to create residue super-resolution. Specifically, for every block, we train a CNN model to perform residue Sr after downsampling and compressing the residue at low resolution, and then we carry out motion estimation (ME) and motion compensation (MC) to extract the residue. Using the MC prediction signal, a new residue Sr-CNN is designed. Additionally, this work comprehensively examines the complexity and performance of VVC intra-coding tools and integrates them with the residue Sr-CNN method. The experiments demonstrate a substantial time savings of 40 % in encoding with BdBr coding gains of 4.2 %, and 2.9 % in AI and rA configurations respectively. © 2025 The Author(s)

关键词： Intra-coding Low complexity PSNr residue super-resolution convolutional neural network VVC

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Comprehensive Study on the Slat Noise of 30P30N High-Lift Airfoil Basd on High-Order Wall-resolved Large-Eddy Simulation

arXiv

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arXiv 2024年

作者： Zhang, Keli Lin, Shizhi Liu, Peiqing Liu, Shihao Liu, Kai Beihang University Beijing100191 China Rankyee Technology Beijing Beijing100097 China School of Aeronautic Science and Engineering China Solver R&D and Development Center CTO

This study presents wall-resolved large-eddy simulations (WrLES) of a high-lift airfoil, based on high-order flux reconstruction (Fr) commercial software dimaxer, which runs on consumer level GPUs. A series of independence tests are conducted, including various Ffowcs Williams-Hawkings sampling surfaces, different mesh densities, simulations at 4tℎ and 5tℎ order accuracies, and varying spanwise lengths, to establish best practice for predicting slat noise through high-order WrLES. The results show excellent agreement with experimental data while requiring significantly fewer computational resources than traditional second-order methods. An investigation on the effects of reynolds number (re) is performed by scaling the airfoil size, with reynolds numbers ranging from 8.55 × 105 to a real aircraft level of 1.71 × 107. By applying simple scaling through Strouhal number (St), spanwise correction, and distance from the receiver, the far-field noise spectra for different reynolds numbers can be coincided. Additionally, simulations are performed at four angles of attack: 3◦, 5.5◦, 9.5◦, and 14◦. The results indicate that higher angles of attack lead to a less intense feedback loop, resulting in lower tonal noise frequencies and reduced noise amplitude. The maximum noise reduction observed is over 14dB when comparing 14◦ to 3◦. Furthermore, an improved formula is proposed to enhance the prediction of slat noise tonal frequencies and to better elucidate the mechanism behind tonal noise generation. Copyright © 2024, The Authors. All rights reserved.

关键词： reynolds number

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A Novel O2/N2 Plasma Photoresist Ashing Process with High Stripping rate and Uniformity under radio Frequency Bias Voltage

A Novel O2/N2 Plasma Photoresist Ashing Process with High St...

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International Conference on (ICEPT) Electronic Packaging technology

作者： Jianwei Xian Huiqian Zhou Minbo Zhou Xinping Zhang Guangdong Provincial Engineering Technology R&D Center of Electronic Packaging Materials & Reliability and School of Materials Science & Engineering South China University of Technology Guangzhou China Dongguan SINDIN Precision Instrument Co. Ltd. Dongguan China

ISBN: (数字)9798350353808

ISBN: (纸本)9798350353815

The development of wafer-level packaging (WLP) technique relies heavily on the preparation of large-area redistribution layers (rdL). One crucial step in rdL fabrication is photoresist stripping, as the quality of this process affects greatly the integrity of rdL lines and the reliability of the packaging. In this study, the effects of two different plasma sources, radio-frequency (rF) inductively coupled plasma (ICP) and microwave (MW) remote plasma, on the removal of photoresist over large areas on eight-inch wafers were systematically investigated. Using the Taguchi method, the quality response characteristics of various equipment parameters (frequency, temperature, power, gas flow rate and gas composition) on the stripping rate and stripping uniformity were evaluated. Additionally, a single-factor level analysis of each equipment parameter was conducted to delve deeper into the influential trends of each factor on the ashing process. The results indicate that the major factors influencing the stripping rate are ionization frequency and temperature, whereas ionization frequency and O 2 concentration in mixed O 2 /N 2 plasma predominantly affect the stripping uniformity. The stripping rate significantly increases with raising temperature and power. Additionally, the presence of a small amount of N 2 in the O 2 /N 2 plasma brings about increase in the stripping rate, although pure oxygen plasma is preferable for achieving lower uniformity. By setting rF bias in the MW remote plasma, the stripping rate is increased from below 100 Å/min to over 250 Å/min, while maintaining the uniformity below 20%.

关键词： radio frequency Temperature Ionization resists Fluid flow Etching Plasmas

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Mechanical Properties and residual Stress Analysis of OdS Ni Superalloy fabricated by Laser Powder Bed Fusion Process

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Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2025年 72卷 S453-S456页

作者： Lee, dong Wan Lee, Su Gwan dhin Van, Cong Kim, Cae ryeong Kim, Jin Chun Kim, Hwi Jun Lim, Joong Gyeong Yoon, Tae Sik School of Materials Science and Engineering University of Ulsan Ulsan Korea Republic of Liquid processing and casting technology R&D division Korea Institute of Industrial Technology Incheon Korea Republic of Research Laboratories DaiShinKangup Co.Ltd Ulsan Korea Republic of

Oxide dispersion Strengthened (OdS) superalloys are high-temperature alloys with enhanced mechanical properties at elevated temperatures. This is achieved by precipitating thermally stable fine oxides (such as Y2O3, ThO2) or carbides within the metal matrix1). These alloys are primarily used in the field of superalloys and recently, the principle has been applied to various metals, including aluminum and copper alloys. The OdS superalloys are generally manufactured by methods such as Hot Isostatic Pressing (HIP) and Spark Plasma Sintering (SPS) after mechanical alloy. These alloys have high strength, making it difficult to process complex shapes, and research on AM technology is being conducted as an alternative manufacturing method. In this study, the experiment was conducted with a Laser Powder bed fusion process using metal powder materials. In this research, the OdS Ni-superalloy powder similar to the composition of MA6000 was manufactured using a gas atomization process. A specimen of the produced OdS Ni-superalloy powder was prepared by an L-PBF process. We measured changes in densification behavior of specimens according to L-PBF process parameters and conducted residual stress measurements in order to identify issues arising during the processing steps. Additionally, we analyzed the powder and PBFed specimens of OdS Ni-Super alloy using optical microscopy, scanning electron microscopy, Xrd, and LPS analysis. © 2025 Japan Society of Powder and Powder Metallurgy.

关键词： Hot isostatic pressing

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Efficient drilling technology of Horizontal Wells in the duverney Block in Canada

Efficient Drilling Technology of Horizontal Wells in the Duv...

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2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Han, Haochen Yang, Guobin Zhang, Guobin Chen, Jia Chen, Peter Fu, Jin Wang, Siqi CNPC Engineering and Technology R&D Company CNPC Materials Procurement Center CNPC GreatWall Drilling Company Ltd.

ISBN: (纸本)9781613998342

recent years, both exploration and development have made considerable progress in the duverney block shale gas in Canada. However, technical problems exposed in horizontal drilling engineering need to be optimized: 1) Loss is common in shallow formations;2) High downhole friction torque, low rOP and drilling cuttings accumulation in long horizontal well section;3) Borehole instability leads to hanger or packer failure;4) drill bits and PdM have short servicing life and low efficiency. Optimization comes from three aspects: (1) Based on previous drilling experience and latest formation condition and development requirement, we design a new well profile for the block taking into drilling safety and further development account;(2) Optimize strong inhibitive, easy-maintenance and high cutting-carrying capacity OBM to ensure the safety requirements in the ultra-long open hole section;(3) BHA and parameters optimization. Optimize drill bit with high-abrasiveness and axial efficiency according to logging data, drillability and UCS. Upgrade conventional PdM into high-performance PdM with even-wall thickness. By means of simulation and calculation, drilling parameters suitable for duverney block has been optimized. Based on the optimization above, a stable and efficient well profile has been improved solving hanger failure on-site efficiently and complete with composite casing design (4-1/2 inch plus 5 inch) in reservoir section;a 90/10 oil-water ratio OBM has been optimized and applied onsite;Combined with high performance PdC bit and even-wall PdM as well as optimized drilling parameters, higher rOP and longer horizontal section have been achieved. The optimization has made successful field application results:(1) Completion depth has been deepened gradually, from 18,080 ft in 2013 to 23,208 ft at present, with an increase of 28.3%;(2) Horizontal section length has been increasing dramatically, from 6,190 ft in 2013 to 10,301 ft at present, with an increase of 66.4%;(3) Th

关键词： Horizontal wells

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Effect of Welding Speed on Microstructural Evolution and Strengthening Mechanism of Friction-Stir Welded 7075 Aluminum

SSRN

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SSrN 2024年

作者： Kim, Jong-Hun Choi, Hyo-Nam Lee, Kwang-Jin Shin, Jae-Hyuck Seo, Nam-Hyuk Jung, Jae-Gil Lee, Seok-Jae Lee, Seung-Joon Gyeonggi-do Siheung-si15073 Korea Republic of Carbon & Light Materials Application R&D Group Korea Institute of Industrial Technology Jeollabuk-do Jeonju-Si54666 Korea Republic of Advanced Materials R&D Department Korea Automotive Technology Institute Chungcheongnam-do Cheonan-Si31214 Korea Republic of Division of Advanced Materials Engineering Jeonbuk National University Jeollabuk-do Jeonju-Si54896 Korea Republic of

In present study, we aim to analyze the microstructural characteristics and strengthening mechanism of AA7075-T6 alloy after the friction-stir welding speeds from 150 to 350 mm min-1. The continuous dynamic recrystallization underwent actively with faster speed, leading to equiaxial and fine grains of 350 specimen, as evidenced by misorientation distribution, grain orientation spread, and aspect ratio. regarding the textural evolution, the 150 specimen retained the deformation texture (e.g., Brass), while the 350 specimen showed the development of recrystallization texture (e.g., Goss). The 250 specimen revealed superior weldability for strength of over ~80% owing to both grain refinement and accumulated dislocations despite the dissolution of precipitates (e.g., GP II zone and ηˊ). © 2024, The Authors. All rights reserved.

关键词： Textures

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