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Hu, D. (author), Wang, Chieh (author), Li, Z. (author), Gupta, N. (author), Poelma, René H. (author), Shi, Ziliang (author), Fan, J. (author), Zhang, Kouchi (author)Driven by the increasing demand for high-power systems, ceramic substrates have received more attention for handling higher power density. Warpage in active metal brazed (AMB) ceramic substrate becomes a critical issue as it can deteriorate the reliability performance. This study comprises three phases, including investigation of the cause of...conference paper 2024
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Hu, X. (author), Huang, Jianlin (author), Poelma, René H. (author), van Driel, W.D. (author), Zhang, Kouchi (author)Low-temperature sintering technology of Ag nanoparticles is widely used in high-power electronic device packaging. Utilizing simulation methods to comprehend and control the microstructure and properties of Ag sintering materials has emerged as a prominent research area. This work uses the General Form PDE module in COMSOL to simplify the...conference paper 2024
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Liu, Xu (author), Hu, D. (author), Li, Z. (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)The nano-copper particles are widely used in the sintering processes of packaging wide bandgap semiconductors. Despite the significant success in the industry, the mechanism bridging the sintering process to the mechanical properties of sintered nano-copper is not yet well-modeled. In this paper, the impacts of different sintering temperatures...conference paper 2024
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Allen, G.M. (author), Hu, Andrea (author), Gadiraju, Ujwal (author)Crowdsourcing is a valuable tool to gather human input which enables the development of reliable artificial intelligence systems. Microtask platforms like Prolific and Amazon's Mechanical Turk have flourished by creating environments where crowd workers can provide such human input in a diverse and representative manner. Such marketplaces...conference paper 2023
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Hu, Yuyang (author), Doğan, D. (author), Brown, Michael (author), Bulot, Mahé (author), Ferin, Guillaume (author), Leus, G.J.T. (author), Kruizinga, P. (author), Steen, Antonius F.W. (author), Bosch, Johannes G. (author)It has been previously demonstrated that applying an aberrating mask for 2D compressive imaging using a low number of sensors (elements) can significantly improve image resolution, as evaluated via the point spread function. Here we investigate the potential to apply a similar approach for 3D flow monitoring. We conducted a 3D k-Wave simulation...conference paper 2023
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Wen, Minzhen (author), Guo, Baotong (author), Chen, Shanghuan (author), Hu, X. (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)The (Ca, Sr) AlSiN₃:Eu²⁺(CSASN:Eu) red phosphor is widely used to improve color rendering of high-power phosphor-converted lighting diode (pc-WLED), but it is always unstable under high temperature and high humidity environments. Therefore, the studies on the temperature and humidity resistance of red phosphors and their aging mechanism have...conference paper 2023
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Du, L. (author), Hu, D. (author), Poelm, René (author), van Driel, W.D. (author), Zhang, Kouchi (author)The application of microporous sintered copper (Cu) as a bonding material to replace conventional die-attach materials in power electronic devices has attracted considerable interest. Many previous studies have focused on the effect of processing parameters (temperature, time, pressure) on the microstructure evolution of sintered Cu. However,...conference paper 2023
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Hu, X. (author), Martin, H.A. (author), Poelma, René H. (author), Huang, J.L. (author), Rijckevorsel, H. (author), Scholten, H. (author), Smits, E.C.P. (author), van Driel, W.D. (author), Zhang, Kouchi (author)Resin-reinforced silver (Ag) sintering material is an effective and highly reliable solution for power electronics packaging. The hybrid material’s process parameters strongly influence its microstructure and pose a significant challenge in estimating its effective properties as a thin interconnect layer. This research demonstrates a novel 3D...conference paper 2023
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Qian, Cheng (author), Hu, D. (author), Liu, Xu (author), Fan, Xuejun (author), Zhang, Kouchi (author), Fan, J. (author)Nano-metal materials sintering has received increasing attention in recent years for its promising performance in the wide bandgap semiconductor packaging. In this paper, molecular dynamics (MD) simulation method were applied to simulate the nano-Cu sintering mechanism and the subsequent mechanical behavior. Hybrid sintering, comprising...conference paper 2023
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Li, Yangzhi (author), Hu, Yusong (author), Tan, T. (author), Yu, Boyuan (author), Li, Jingwei (author), Fingrut, Adam (author)The prevailing issue of low housing supply is caused in part by a lack of skilled construction workers. If unskilled residents were adequately equipped, they could potentially address this issue, expanding and adapting their homes without professional builders and designers. This research proposes the use of discrete components to build on...conference paper 2023
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Hu, D. (author), Li, Z. (author), Fan, J. (author), Zhang, Kouchi (author)As a critical part of speeding up industrial electrification, power electronics, and its packaging technology are undergoing rapid development. Cu nanoparticle sintering technology has therefore received extensive attention for its excellent performance in the die-attachment layer, where the mechanical properties are essential to be known for...conference paper 2023
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Walker, C (author), Kusela, C. (author), Young, A (author), Verts, W. (author), Gao, J.R. (author), Hu, Qing (author), Silva, J. R.G. (author), Mirzaei, B. (author), Laauwen, Wouter (author)Gal/Xgal U/LDB Spectroscopic/ Stratospheric THz Observatory (GUSTO) is a NASA Explorers Mission of Opportunity that will make large scale maps of the Milky Way and Large Magellanic Cloud in three important interstellar lines: [CII], [OI], and [NII] at 158, 63, and 205 μm, respectively. During its ~75 day stratospheric (~36 km) flight, GUSTO’s 0...conference paper 2022
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Balayn, A.M.A. (author), He, G. (author), Hu, Andrea (author), Yang, J. (author), Gadiraju, Ujwal (author)Access to commonsense knowledge is receiving renewed interest for developing neuro-symbolic AI systems, or debugging deep learning models. Little is currently understood about the types of knowledge that can be gathered using existing knowledge elicitation methods. Moreover, these methods fall short of meeting the evolving requirements of...conference paper 2022
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Ji, X. (author), van Ginkel, H.J. (author), Hu, D. (author), Schmidt-Ott, A. (author), van Zeijl, H.W. (author), Vollebregt, S. (author), Zhang, Kouchi (author)Advances in semiconductor device manufacturing technologies are enabled by the development and application of novel materials. Especially one class of materials, nanoporous films, became building blocks for a broad range of applications, such as gas sensors and interconnects. Therefore, a versatile fabrication technology is needed to...conference paper 2022
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Revyn, N. (author), Hu, Michel H.Y. (author), Frimat, Jean-Philippe (author), de Wagenaar, B. (author), van den Maagdenberg, Arn M.J.M. (author), Sarro, Pasqualina M (author), Mastrangeli, Massimo (author)We present preliminary recordings on chip of three-dimensional (3D) electric neuronal activity from cultures of cortical neurons derived from human-induced pluripotent stem cells (hiPSCs). The recordings were obtained through 3D microelectrode arrays (MEAs) composed of truncated, 90 μm-high Si micropyramids endowed with multiple, electrically...conference paper 2022
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Hu, Yuyang (author), Brown, Michael (author), Doğan, D. (author), Leus, G.J.T. (author), Kruizinga, P. (author), Van Der Steen, Antonius F.W. (author), Bosch, Johannes G. (author)We intend to develop an ultrasound compressive imaging device to perform carotid artery (CA) function and flow monitoring/imaging by using just a few single element transducers equipped with spatial coding masks. The spatially unique impulse responses can be exploited in compressive reconstructions. To explore the potential of different...conference paper 2022
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Allen, G.M. (author), Hu, Andrea (author), Gadiraju, Ujwal (author)Human input is pivotal in building reliable and robust artificial intelligence systems. By providing a means to gather diverse, high-quality, representative, and cost-effective human in put on demand, micro task crowdsourcing marketplace shave thrived. Despite the unmistakable benefits available from online crowd work, the lack of health...conference paper 2022
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Hu, Z. (author), Wyrzykowski, M. (author), Lura, P. (author)Creep at early ages significantly affects the volumetric deformation of cementitious materials. Efficient modelling of early-age creep is a challenging task, mainly due to continuously evolving material properties (hydration) and other phenomena (e.g. autogenous shrinkage) taking place in parallel. Various methods were introduced during the past...conference paper 2021
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Liu, Qing-feng (author), Mao, Li-xuan (author), Hu, Zhi (author)Existing reinforced concrete structures experience severe durability degradation when subjected to alkali–silica reaction (ASR) and chloride attack. A special electrochemical rehabilitation treatment, containing lithium compound anolyte, has been developed to drive lithium ions into concrete as well as remove chlorides simultaneously, for...conference paper 2021
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Wu, Xintong (author), Huang, Haoliang (author), Liu, Hao (author), Hu, Jie (author), Wei, Jiangxiong (author), Yu, Qijun (author)In this study, a new concept on self healing of cracks that the ingressive ions in the crack is chemically bound to improve the self-healing efficiency was proposed for cracked cementitious materials in a marine environment. Thermodynamic modeling was performed to determine the appropriate masses and ratio of Ca2+ and Al3+ provided by chemical...conference paper 2021