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Thermal reliability analysis and optimization of polymer insulating through-silicon-vias(TSVs) for 3D integration

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Science China(Technological Sciences) 2014年第1期57卷 128-135页

作者： ZHONG ShunAn WANG ShiWei chen qianwen DING YingTao School of Information and Electronics Beijing Institute of Technology

Polymer insulating through-silicon-vias （TSVs） is an attractive approach for high-performance 3D integration systems. To further demonstrate the polymer insulating TSVs, this paper investigates the thermal stability by measuring the leakage current under bias-temperature condition, studies the thermal stress characteristics with Finite Element Analysis （FEA）, and tries to improve the thermal mechanical reliability of high-density TSVs array by optimizing the geometry parameters of pitch, liner and redistribution layer （RDL）. The electrical measurements show the polymer insulating TSVs can maintain good insulation capability （less than 2x 10TM A） under challenging bias-temperature conditions of 20 V and 200~C, despite the leakage degra- dation observation. The FEA results show that the thermal stress is significantly reduced at the sidewall, but highly concen- trates at the surface, which is the potential location of mechanical failure. And, the analysis results indicate that the polymer insulating TSVs （diameter of 10 μm, depth of 50 μm） array with a pitch of 20 μm, liner thickness of 1 μm and RDL radius of 9 μm has an optimized thermal-mechanical reliability for application.

关键词： through-silicon-vim (TSVs) three-dimensional (3D) integration polymer insulating finite element analysis (FEA)

Optimization of rare earth carbonate reactive-crystallization process based on response surface method

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Journal of Rare Earths 2021年第1期39卷 98-104,I0004页

作者： Dongmei Zhu qianwen chen Tingsheng Qiu Guanfei Zhao Xihui Fang School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China School of Mineral Processing and Bioengineering Central South UniversityChangsha 410083China

Rare earth carbonate precipitation is mainly amorphous,of large volume and difficult to *** prepare crystalline rare earth carbonate,mother liquor of heavy rare earth was taken as research object,and the experimental scheme was designed based on the response surface central composite design(CCD)*** concentration of mother liquor,aging time and seed crystal dosage were taken as independent variables,and the particle size of rare earth carbonate was taken as the response value to establish a quadratic polynomial numerical model to optimize the reactive-crystallization process of rare earth *** results show that these three factors have significant effect on the particle size of rare earth carbonate,and the influence order is mother liquid concentration>aging time>seed crystal ***,the interaction between mother liquor concentration and seed crystal dosage has a significant effect on the size of rare earth carbonate *** optimal parameters predicted by the model are as follows:the concentration of mother liquid is 1.75 g/L,seed crystal dosage is 13.56 wt%,and aging time is 8 *** these conditions,the predicted particle size is 28.74μm,and the experiment particle size is 28.23μm,between both,the relative error is 0.73%,which indicates that the established response surface model has a good prediction effect and a certain practical significance to guide the reactive-crystallization process of rare earth *** obtained rare earth carbonate has a crystallinity of 97.82%,uniform particles size,and low-hydrated crystals with a tengerite structure.

关键词： Rare earth carbonate Reactive-crystallization Process optimization Response surface method Seed crystal

Investigation on mechanism of polymer filling in high-aspect-ratio trenches for through-silicon-via(TSV) application

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Science China(Technological Sciences) 2014年第8期57卷 1616-1625页

作者： DING YingTao YAN YangYang chen qianwen WANG ShiWei chen Xiu chen YueYang School of Information and Electronics Beijing Institute of Technology

Vacuum-assisted spin-coating is an effective polymer filling technology for sidewall insulating of through-silicon-via(TSV).This paper investigated the flow mechanism of the vacuum-assisted polymer filling process based on experiments and numerical simulation,and studied the effect of vacuum pressure,viscosity of polymer and aspect-ratio of trench on the filling performance.A 2D axisymmetric model,consisting of polymer partially filled into the trench and void at the bottom of trench,was developed for the computational fluid dynamics(CFD)*** simulation results indicate that the vacuum-assisted polymer filling process goes through four stages,including bubble formation,bubble burst,air elimination and polymer ***,the simulation results suggest that the pressure significantly affects the bubble formation and the polymer re-filling procedure,and the polymer viscosity and the trench aspect-ratio influence the duration of air elimination.

关键词： through-silicon-via (TSV) vacuum process polymer filling computational fluid dynamics (CFD)

Towards high-performance lithium metal anodes via the modification of solid electrolyte interphases

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Journal of Energy Chemistry 2020年第6期29卷 7-17,I0001页

作者： Zhen Hou Jiaolong Zhang Wenhui Wang qianwen chen Baohua Li Chaolin Li Shenzhen Key Laboratory of Organic Pollution Prevention and Control Environmental Science and Engineering Research CenterHarbin Institute of TechnologyShenzhen 518055GuangdongChina Department of Chemistry Southern University of Science and Technology(SUSTech)Shenzhen 518055GuangdongChina Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolShenzhen 518055GuangdongChina

Li metal has been regarded as one of the most promising anodes for high-energy-density storage systems due to its high theoretical capacity and lowest electrochemical ***,an unstable and non-uniform solid electrolyte interphase(SEI)deriving from the spontaneous reaction between Li metal anode and electrolyte causes uneven Li deposition,resulting in the growth of Li dendrites and low Coulombic efficiency,which have greatly hindered the practical application of Li metal ***,the construction of a stable SEI is an effective approach to suppress the growth of Li dendrites and enhance the electrochemical performances of Li metal *** this review,we firstly introduce the formation process of inferior SEI of Li metal anode and the corresponding challenges caused by the unstable ***,recent progresses to modify SEI layer through the regulation of electrolyte compositions and exsitu protective coating are ***,the remained issues,challenges,and perspectives are also proposed on the basis of current research status and progress.

关键词： Li metal anode Coulombic efficiency Dendrites Solid electrolyte interphases Coating

A facile method to introduce a donor-acceptor system into polymeric carbon nitride for efficient photocatalytic overall water splitting

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Journal of Materials Science & Technology 2023年第10期141卷 32-41页

作者： Yabin Jiang Chi Cao Yueyang Tan qianwen chen Lei Zeng Wensheng Yang Zongzhao Sun Limin Huang School of Materials Sun Yat-Sen UniversityShenzhen 518107China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Engineering Research Center for Nanomaterials Henan UniversityKaifeng 475004China Institute of Molecular Plus Tianjin UniversityTianjin 300072China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

It is a prospective strategy to produce sustainable energy by photocatalytic overall water splitting(POWS).This work aims to develop a simple method for integrating a donor-acceptor system into polymeric car-bon nitride(PCN)structure,which could accelerate the charge separation *** the as-prepared photocatalyst(COCNT),carbon and oxygen were successfully incorporated into the framework of PCN,and the chemical environment of C and O was well probed by X-ray absorption near-edge structure(XANES)and X-ray photoelectron spectroscopy(XPS).It showed that the C-containing and O-containing segments of COCNT played the role of a donor,while the heptazine part played the role of an *** addition,Density-functional-theory(DFT)calculations confirmed the spatial split of the highest occupied molec-ular orbital(HOMO)and lowest unoccupied molecular orbital(LUMO)for promoting charge ***,COCNT could efficiently split pure water to generate hydrogen and ***,the photo-catalytic hydrogen evolution rate over COCNT(1550.9μmol g^(-1)h^(-1))is about 17-fold higher than that of ***,we proposed a possible photocatalytic mechanism to explain the above results.

关键词： Polymeric carbon nitride Donor-accept system Tubular structure Photocatalysis Overall water splitting

COX-2 blocking therapy in cisplatin chemosensitization of ovarian cancer:An allicin-based nanomedicine approach

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Chinese Chemical Letters 2024年第8期35卷 449-454页

作者： Huijiao Fu Peiqin Liang qianwen chen Yan Wang Guang Li Xuzi Cai Shengtao Wang Kun chen Shengying Shi Zhiqiang Yu Xuefeng Wang Department of Obstetrics and Gynecology The Third Affiliated Hospital of Southern Medical UniversityGuangzhou 510630China Department of Obstetrics and Gynecology Huizhou Central People’s HospitalHuizhou 516001China Affiliated Foshan Maternity&Child Healthcare Hospital Southern Medical University(Foshan Maternity&Child Healthcare Hospital)Foshan 528000China Guangdong Key Laboratory of New Drug Screening School of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Department of Nursing Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China Department of Laboratory Medicine Dongguan Institute of Clinical Cancer ResearchThe Tenth Affiliated Hospital of Southern Medical University(Dongguan People’s Hospital)Dongguan 523018China

Recently,the utilization of nonsteroidal anti-inflammatory drugs(NSAIDs)to sensitize cisplatin(CDDP)has gained substantial traction in the treatment of ovarian cancer(OC).However,even widely employed NSAIDs such as celecoxib and naproxen carry an elevated risk of cardiovascular events,notably ***,the diminished sensitivity to CDDP therapy in OC is multifactorial,rendering the ap-plication of NSAIDs only partially effective due to their cyclooxygenase-2(COX-2)inhibiting ***,in this study,reactive oxygen species(ROS)-responsive composite nano-hydrangeas loaded with the Chinese medicine small molecule allicin and platinum(IV)prodrug(DTP@AP NPs)were prepared to achieve comprehensive *** one front,allicin achieved COX-2 blocking therapy,en-compassing the inhibition of proliferation,angiogenesis and endothelial mesenchymal transition(EMT),thereby mitigating the adverse impacts of CDDP ***,synergistic chemosensi-tization was achieved from multifaceted mechanisms by decreasing CDDP inactivation,damaging mito-chondria and inhibiting DNA *** essence,these findings provided an optimized approach for syner-gizing CDDP with COX-2 inhibitors,offering a promising avenue for enhancing OC treatment outcomes.

关键词： COX-2 blocking therapy CDDP Chemosensitization Allicin Ovarian cancer

Research of Supercritical CO₂ Fluid Refined Natural Borneol

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American Journal of Plant Sciences 2016年第13期7卷 1794-1801页

作者： Hongcheng He Layun Deng Kedan He qianwen chen Hunan Academy of Forestry Changsha China Department of Chemistry Centre College Danville USA College of Materials Science and Engineering Central South University of Forestry & Technology Changsha China

In this study, with borneol fragments in the crystallized mother liquor of natural borneol used as the raw materials, supercritical carbon dioxide method is adopted for refining to get high purity borneol. The result of the experiment shows that the yield and purity are excellent with an extraction pressure of 11 MPa, an extracting temperature of 40°C, a carbon dioxide flow rate of 25 L·h-1 and an extraction time of 20 minutes. After detected by gas chromatography, the purity of the crystallization products could reach 96%.

关键词： Natural Borneol Supercritical Carbon Dioxide Purification Process

银行信贷扩张有助于制造业升级吗?——基于研发创新的中介影响

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产业经济研究 2021年第4期 42-54页

作者：张平陈倩雯上海财经大学金融学院上海200433

制造业升级离不开制造业融资的支撑。作为制造业企业融资的主要渠道,银行信贷对制造业升级起着重要的支持作用。基于2001—2018年全球82个国家的面板数据,检验了银行信贷扩张对制造业升级的影响,并且从研发创新的角度探究其影响路径。... 详细信息

制造业升级离不开制造业融资的支撑。作为制造业企业融资的主要渠道,银行信贷对制造业升级起着重要的支持作用。基于2001—2018年全球82个国家的面板数据,检验了银行信贷扩张对制造业升级的影响,并且从研发创新的角度探究其影响路径。研究结果表明:银行信贷扩张能够显著促进制造业升级;但随着银行信贷扩张,制造业升级速度逐渐放缓。这一结论在一系列稳健性检验与内生性分析后仍然显著。进一步的影响路径分析发现,银行信贷扩张通过提升企业的研发创新水平,推动了制造业升级。在异质性分析中发现,银行信贷扩张对制造业升级的作用因金融市场类型、信息技术水平和服务业发展水平的不同而存在差异。研究结论揭示了"银行信贷扩张—研发创新提升—制造业升级"的作用路径,表明银行信贷在推动制造业升级方面发挥着不可估量的作用,这对于当前我国制造业升级具有重要的启示意义。

关键词：银行信贷扩张制造业升级研发创新融资约束资源配置中介效应

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污泥化学链气化特性试验研究

动力工程学报 2016年第8期36卷 658-663页

作者：陈倩文沈来宏牛欣东南大学能源热转换及过程测控教育部重点实验室南京210096

为改善污泥气化效果,采用化学链气化技术处置污泥.在小型流化床上进行试验,基于赤铁矿载氧体,研究了O/C物质的量比、气化温度和水蒸气体积分数对污泥气化特性的影响以及赤铁矿多次连续循环过程中的物化性能.结果表明:赤铁矿会显著提高... 详细信息

为改善污泥气化效果,采用化学链气化技术处置污泥.在小型流化床上进行试验,基于赤铁矿载氧体,研究了O/C物质的量比、气化温度和水蒸气体积分数对污泥气化特性的影响以及赤铁矿多次连续循环过程中的物化性能.结果表明:赤铁矿会显著提高污泥的气化程度和碳转化率;当O/C物质的量比增大时,合成气中CO和CH_4的体积分数下降,H_2的体积分数呈现先下降后上升的趋势;随着气化温度的升高,合成气中CO和H_2的体积分数逐渐提高,CO_2和CH_4的体积分数降低,碳转化率不断提高;当水蒸气体积分数增大时,CO_2和H_2的体积分数逐渐提高,CO和CH_4的体积分数不断下降,碳转化率提高;赤铁矿在长时间运行中表现出良好的反应性.

关键词：化学链气化污泥赤铁矿碳转化率