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BCB介质层同轴TSV的热力学仿真分析

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BCB介质层同轴TSV的热力学仿真分析
Thermodynamics Simulation and Analysis of Coaxial TSV with BCB Dielectric Layer
投稿时间:2019-07-11
DOI:10.15918/j.tbit1001-0645.2019.195
中文关键词:同轴TSVBCB介质层热应力有限元分析
English Keywords:coaxial TSVBCB dielectric layerthermal stressfinite element analysis
基金项目:国家自然基金资助项目(62074015,61774015)
作者单位
丁英涛北京理工大学 信息与电子学院, 北京 100081
吴兆虎北京理工大学 信息与电子学院, 北京 100081
杨宝焱北京理工大学 信息与电子学院, 北京 100081
杨恒张北京理工大学 信息与电子学院, 北京 100081
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中文摘要:
穿透硅通孔(through silicon via,TSV)的热机械可靠性问题已经成为制约TSV市场化应用的重要因素.本文对BCB介质层同轴TSV的热力学特性进行了研究分析,同时对其几何参数(SiO2绝缘层厚度、屏蔽环厚度、TSV间距、中心信号线半径)进行了变参分析,为降低热应力提供指导意见.结果表明,在阻抗匹配的前提下,通过增加SiO2绝缘层厚度、减小屏蔽环厚度能够有效降低同轴TSV的诱导热应力;相比之下中心信号线半径和TSV间距的变化对其影响可忽略不计.
English Summary:
Thermo-mechanical reliability of through silicon via (TSV) has become an important factor restricting the market application of TSV. In this paper, the thermodynamics characteristics of coaxial TSV with BCB dielectric layer were studied and analyzed. Meanwhile, in order to reduce the thermal stress of coaxial TSV, different parameters were simulated with various design geometries, including the thickness of SiO2 insulation layer and shielding ring, the pitch of TSVs as well as the radius of center signal line. The results show that, under the premise of the characteristic impedance match, the thermal stress of coaxial TSV can be effectively reduced by increasing the thickness of SiO2 insulation layer or decreasing the thickness of shielding ring,while the influence of the radius of the center signal line and the TSV pitch can be neglected.
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