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Study on thermal stress behavior of mold type POL tile

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Study on thermal stress behavior of mold type POL tile

Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Kei Murayama Kiyoko Tajima Mikiko Kobayashi Junichi Mizushima Shingo Hayashibe Kiyoshi Oi Process Development Dept. R&D Div. Shinko Electric Industries Co. Ltd. Nagano Japan Desigining Technology Dev. R&D Div. Shinko Electric Industries Co. Ltd. Nagano Japan Advanced Products Dev. R&D Div. Shinko Electric Industries Co. Ltd. Nagano Japan

The power module industry requires smaller common packages to meet the rapidly growing demand. Power Over Lay (POL) tile is a promising candidate to meet these requirements. In this report, we will discuss the behavior of mold type POL tiles under thermal stress and the challenges they face. Temperature cycling tests were performed on several POL tile Cu wiring designs and mold resin combinations. The combination of the design with Cu wiring on the entire surface of the device and the use of high-toughness molding resin was demonstrated high reliability in temperature cycles. Thermal stress analysis results using a full-scale model of mold type POL tile with this combination showed decrease in plastic strain at Cu via connection and low damage level at pad opening portion.

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development and characterization of a continuous ultrasound emulsification and nano-emulsion polymerization process

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Tetrahedron Green Chem

Tetrahedron Green Chem 2023年 2卷

作者： Loncke, Jonas Vancleef, Arne dermaut, Wim Braeken, Leen Thomassen, Leen C.J. KU Leuven Department of Chemical Engineering Research Unit CIPT Campuslaan 25 Diepenbeek B-3590 Belgium R&D Chemical Process Development Agfa Septestraat 27 Mortsel 2640 Belgium

Typically, nano-emulsions are prepared in batch high-speed homogenization or ultrasound processes and polymerized afterwards in batch reactors. However, fully continuous processes have the potential to decrease production costs and energy consumption compared to batch processes. This research thus focuses on implementing ultrasound into a fully continuous emulsification and nano-emulsion polymerization process to obtain latex nano-particles from butylmethacrylate and ethylene glycol dimethacrylate. The goal of this research is to produce nano-emulsions and nano-particles with the smallest obtainable size and polydispersity in a fully continuous two-stage process. In the first stage or emulsification stage, parameters like flowrate, residence time and acoustic power are varied to influence and determine the optimal energy density. In second stage or reaction stage, residence time and reaction temperature are studied to obtain particles of monodisperse sizes. Samples produced in both stages are analysed with dynamic Light Scattering to measure the average size and polydispersity (PdI) of the emulsion droplets and particles. Emulsification results indicate that droplet size and PdI decreases at increasing energy densities (J/ml) until 60 J/ml after which a constant droplet size of 150 nm and PdI of 0.230 are reached. Furthermore, a particle size of 50 nm and PdI of 0.080 were achieved in both batch and continuous polymerization reactors after 5 min at 85 °C. By implementing the most optimal process parameters, small emulsion droplets and particles were obtained more energy efficient in a shorter emulsification and reaction time compared to literature ultrasound assisted nano-emulsion polymerization processes. © 2023 The Authors

关键词： Continuous emulsification Nano-emulsion polymerization Nano-particles Ultrasound emulsification

Academic-Industrial Collaborations: Merging Paths to Thrive

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OrGANIC LETTErS 2024年第14期26卷 2669-2671页

作者： Bao, Hongli Bravo-Altamirano, Karla Buchan, Zachary Cabrera, Pablo J. ryan, Sarah J. roth, Joshua J. Sartillo-Piscil, Fernando Sawai, Yasuhiro Tambar, Uttam K. Zarate, Cayetana Key Laboratory of Coal to Ethylene Glycol and Its Related Technology State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 P. R. China Pfizer Worldwide Research and Development Medicine Eastern Point Road Groton Connecticut 06340 United States Discovery Chemistry Small Molecule Discovery and Development Corteva Agrisciences 9330 Zionsville Road Indianapolis Indiana 46268 United States Chemical Research & DevelopmentPfizer Worldwide Research & Development Eastern Point Road Groton Connecticut 06340 United States Nufarm Limited Pipe Road Laverton North VIC 3026 Australia Centro de Investigación de la Facultad de Ciencias Químicas Benemérita Universidad Autónoma de Puebla (BUAP) 14 Sur Esq. San Claudio Col. San Manuel 72570 Puebla México Synthetic Molecule Process Development Pharmaceutical Sciences Takeda Pharmaceutical Company Limited 26-1 Muraoka-Higashi 2-chome Fujisawa Kanagawa 251-8555 Japan Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas Texas 75390-9038 United States Johnson & Johnson Innovative Medicine Chemical Process R&D Cilag AG Hochstrasse 201 8200 Schaffhausen Switzerland

Atomistic Multiscale Simulation-Based Extraction of design Margins in Advanced Transistor Architectures

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Atomistic Multiscale Simulation-Based Extraction of Design M...

International Conference on Simulation of Semiconductor processes and devices (SISPAd)

作者： Jun Jung Geunsang Yoo Alexander Schmidt Wonyup Song Hiroyuki Kubotera Muralikrishna raju Byounghak Lee Woosung Choi Anthony Payet Hiroo Koshimoto Yasuyuki Kayama Beom Seo Kim Chungyeon Lee Jamin Koo Joohyun Jeon Seungmin Lee dae Sin Kim CSE Team Innovation Center Samsung Electronics Hwaseong Korea TCAD-lab Samsung Semiconductor Inc San Jose CA United States Process TCAD Lab Samsung Device Solutions R&D Japan Yokohama-shi Japan DRAM PA2 Memory Samsung Electronics Hwaseong Korea DRAM Process Development Memory Samsung Electronics Hwaseong Korea

ISBN: (数字)9798331516352

ISBN: (纸本)9798331516369

Employing Kinetic Monte Carlo (KMC) method for epitaxy simulation reinforced with Molecular dynamics for KMC model parameter extraction, this study establishes an approach for determining design margins in transistor architectures characterized by high aspect ratio cavities. This integrated atomistic and multiscale simulation framework allows prediction of the epitaxy quality and potential defects as well as the optimization of key design parameters.

关键词： Semiconductor device modeling Monte Carlo methods Atomic layer deposition Prediction algorithms Epitaxial growth Semiconductor process modeling Kinetic theory Transistors Optimization Parameter extraction

Failure Modes of Granite with Annular Grooves Under Impact Action of the Single Button

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SSrN 2023年

作者： Wang, Huajian Liao, Hualin Niu, Wenlong Peng, Jianming He, Yuhang Wei, Jun Shandong Qingdao266580 China Key Laboratory of Unconventional Oil and Gas Development Ministry of Education Shandong Qingdao266580 China Shandong Ultra-deep Drilling Process Control Tech R&D Center Shandong Qingdao266580 China College of Construction Engineering Jilin University Changchun130026 China

The compression effect of geostatic stresses and hydrostatic pressure on rock increases with the depth of geothermal wells, which strengthens the rocks and reduces the rate of penetration. Overcoming the strengthening effect of stress on rock and weakening rock has become a key approach to increasing drilling speed. This paper proposes a novel method for improving the rate of penetration for deep drilling by employing ultra-high-pressure water jets to create annular groove in the bottom hole rock, which could release in-situ stresses and consequently weaken the hard-to-break zone at the periphery of the bottom hole. Using experimental and numerical simulation methods, analyzing the effects of slotted granite and slotting characteristics on failure mode, backward impacting energy, and impact force under the condition of bottom hole stress. The results reveal that the presence of grooves prevents the energy needed to break rocks from being transferred to the far field area. Instead, the stress wave reflects within the rock between the grooves, leading to tensile failure and a significant increase in the number and area of cracks in the rock. Additionally, the specific energy exhibits greater sensitivity in the groove depth range of 5-15mm, experiencing a 64% reduction as the groove depth increases from 5mm to 15mm. Moreover, the backward impacting energy decreases gradually with the increase of groove depth, and when the groove depth reaches 15 mm, almost no backward impact energy is generated, and the impact force decreases by 51%. Furthermore, the effect of groove characteristics on rock failure characteristics is analyzed. Groove depth has the most significant impact on rock failure;an increase in groove depth not only increases the internal crack density within the rock but also facilitates the occurrence of blocky rock masses more easily, the deeper the groove, the more significantly the blocky rock masses. The research results of this paper provide an effective

关键词： Granite

Comparative Experimental Analysis of Single Pdc Cutter Cutting Slotted and Intact Granite

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SSrN 2023年

作者： Wang, Huajian Liao, Hualin Niu, Wenlong Xu, Junfu Liu, Yongwang He, Yuhang Shandong Qingdao266580 China Key Laboratory of Unconventional Oil and Gas Development Ministry of Education Shandong Qingdao266580 China Shandong Ultra-deep Drilling Process Control Tech R&D Center Shandong Qingdao266580 China Shengli oil service co.ltd Shandong Dongying257000 China

In response to the issue of increased bottom-hole stress leading to higher rock strength and reduced rate of penetration, a novel drilling technology has been proposed. This technology utilizes ultra-high-pressure water jets to slot peripheral grooves in the bottom-hole rock, reducing stress and enhancing the rock's drillability, which protects the cutter and improves rate of penetration. The purpose of this study is to investigate the effectiveness of this innovative drilling technology and the failure modes of slotted granite during linear cutting, as well as assess the cutting performance of slotted granite. Cutting experiments were conducted to compare both grooved and intact granite in terms of cutting forces, force fluctuations, cuttings size, energy consumed in rock-breaking, the surface morphology along the cutting path, and the micro-morphology of the fracture surfaces. The results indicate that the average cutting force for slotted granite is reduced by 26.57% compared to intact granite, while the fluctuation is increased by 20.06%, increasing the blocky rock masses pronounced. Moreover, the energy consumption of rock breaking for slotted granite is 27.5% lower than that of intact granite. The cutting trajectory of the grooved granite is rougher compared to that of the intact granite, and the fluctuation degree of the cutting trajectory depth has increased by 40.45%, resulting in deeper pits and increased average cutting depth. SEM analysis reveals that slotted granite exhibits more tensile failure on both sides of the cutting trajectory and at the groove fracture surface. The slotted granite reduces the compressive action of confining pressure on the rock and weakens the confining pressure's inhibition on crack propagation. The key findings of this study provide an effective technique for enhancing rate of penetration in hard rock drilling and expand the understanding of rock cutting and breaking mechanisms. © 2023, The Authors. All rights reserved.

关键词： Granite

Experimental and Numerical Simulation Study on the Effect of Granite Slotting Characteristics on Pdc Cutter Cutting Performance

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SSrN 2023年

作者： Wang, Huajian Liao, Hualin He, Yuhang Niu, Wenlong Wei, Jun Niu, Jilei Gao, Fucheng Shandong Qingdao266580 China Key Laboratory of Unconventional Oil and Gas Development Ministry of Education Shandong Qingdao266580 China Shandong Ultra-deep Drilling Process Control Tech R&D Center Shandong Qingdao266580 China Exploration Division of PetroChina Liaohe Oilfield Company Liaoning Panjin124010 China

How to improve drill bit working efficiency in deep drilling has been a wide concerned issue in petroleum industry. Utilizing ultra-high-pressure water jet to slot the bottom hole rock and reconfiguration the stress field is considered an effective method to enhance drillability and improve rate of penetration. However, there is currently no relevant report available on the effect of groove characteristics, which are important factors affecting rock break efficiency. Therefore, this study combines lab test with numerical simulations to analyze the effects of rock groove characteristics under the simultaneous action of confining pressure and hydrostatic pressure on cutting force, energy consumption of rock breaking, cutting size, cutting trajectory morphology, stress distribution characteristics, crack characteristics, and failure modes. The research results show that increasing groove depth and number significantly reduce cutting force, enhance rock fragmentation mass, and significantly improve rock breaking efficiency. There exists a threshold for specific energy consumption of rock breaking under different groove characteristics, with a 35.17% decrease in energy consumption of rock breaking at a cutting depth of 15mm, and the lowest energy consumption of rock breaking when the number of grooves is 2. The reduced compressive effect of the confining pressure on the rock after grooving decreases the inhibitory effect on internal crack propagation and the increase in internal cracks and the higher proportion of tensile failure contribute to the increased rock breaking efficiency. This study provides theoretical and technical guidance for ultra-high-pressure water jet drilling technology. © 2023, The Authors. All rights reserved.

关键词： Energy utilization

rapid detection of Four Foodborne Pathogens Based on Terahertz Time domain Spectroscopy

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Rapid Detection of Four Foodborne Pathogens Based on Teraher...

International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

作者： Wenzhi Bian Song Li Tingting Zhang Shuhua Zhang Yujuan Chen Zhiping Li Changchun University of Science and Technology School of Life Science and Technology Changchun China Changchun GeneScience Pharmaceutical Co. Ltd. Research and Development Center for Process and Analysis Methods Changchun China R&D Department Changchun GeneScience Pharmaceutical Co. Ltd. Changchun China Academy of Military Medical Sciences Institute of Military Veterinary Medicine Changchun China

ISBN: (数字)9798350362107

ISBN: (纸本)9798350362114

At present, with the improvement of people's living standards, food borne pathogens, as one of the biggest threats to food safety, are widely valued by people. Therefore, it is urgent to create a fast and efficient method for detecting foodborne pathogens. This article discusses the establishment of a fast and non-destructive detection method for foodborne pathogenic bacteria using terahertz time-domain spectroscopy. In this study, the bacterial dry powder of Cronobacter sakazakii was mixed with polyethylene with different mass ratios (0 %, 1 %, 5 %, 10 %, 20 %, 30 %, 40 %, 50 %, 100 % w/w) to make tablet, the thickness of the tablet is 1~1.4 mm, and the diameter is 1.4 cm, and the mass is 0.18 g. Transmission spectrum was used for detection. By observed and analyzed the absorption spectra, the waveforms of three groups of repeated data showed consistency, and there were obvious characteristic absorption peaks at 1.28 and 1.78 THz. The accuracy of clustering software analysis results is 100 %, which shows that the method has good stability and specificity. The detection limit of Cronobacter sakazakii is 1%. We have successfully established a terahertz time-domain spectral detection method for foodborne pathogens. This method is rapid, stable and sensitive, and has a broad application prospect.

关键词： Pathogens Spectroscopy Sensitivity Powders Absorption Stability criteria Software Production facilities Time-domain analysis Standards

Analyzing the Performance of Single-Tooth rock Cutting Under Bottom-Hole Pressure Conditions

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SSrN 2023年

作者： Niu, Wenlong Liao, Hualin Wang, Huajian Pei, Xueliang Shi, Yucai Niu, Jilei Shandong Qingdao266580 China Key Laboratory of Unconventional Oil and Gas Development Ministry of Education Shandong Qingdao266580 China Shandong Ultra-deep Drilling Process Control Tech R&D Center Shandong Qingdao266580 China Drilling Technology Research Institute SINOPEC Shengli Oilfield Service Corporation 257017 China

Addressing the ambiguity surrounding the process of crack initiation and propagation in rock subjected to confining pressure and hydrostatic pressure, this study integrates laboratory experiments with numerical simulations. First, an analysis is conducted on the cutting force, rock fragmentation energy consumption, rock chip size, and distribution of cutting stress in rocks simultaneously exposed to confining pressure and hydrostatic pressure. Subsequently, an internal crack propagation analysis model for rock is established using the finite discrete element method, and the accuracy of this model is verified through experimentation. The process and characteristics of internal crack propagation during the cutting process are analyzed. Lastly, the variation characteristics of cutting forces under different cutting parameter conditions are compared. The findings indicate that, under identical cutting conditions, confining pressure reduces the degree of granite rock fragmentation, increases the presence of powdery rock debris, and mitigates force fluctuation characteristics, leading to an approximate 17% increase in energy consumption of rock breaking. The presence of confining pressure promotes the generation of micro-cracks within the rock, but restricts the expansion of primary cracks. Notably, shear cracks ahead of the cutting teeth and tensile cracks beneath the cutting path are conspicuously diminished, thereby augmenting the difficulty of rock failure. The elevation of confining pressure and cutting depth emerges as the principal factors contributing to elevated cutting forces, with cutting forces exhibiting exponential growth with increasing confining pressure. At a confining pressure of 9 MPa, cutting forces escalate by 50%. Moreover, substantial cutting depth induces discontinuity in the rock failure mechanism. Stress during cutting predominantly concentrates in the vicinity of the PdC tooth front and beneath the cutting trajectory, extending along the advance

关键词： Energy utilization