Parasitic effects of air-gap through-silicon vias in high-speed three-dimensional integrated circuits  

Parasitic effects of air-gap through-silicon vias in high-speed three-dimensional integrated circuits

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作  者:刘晓贤 朱樟明 杨银堂 丁瑞雪 李跃进 

机构地区:[1]School of Microelectronics, Xidian University

出  处:《Chinese Physics B》2016年第11期619-624,共6页中国物理B(英文版)

基  金:Project supported by the National Basic Research Program of China(Grant No.2014CB339900);the National Natural Science Foundation of China(Grant Nos.61376039,61334003,61574104,and 61474088)

摘  要:In this paper,ground-signal-ground type through-silicon vias(TSVs) exploiting air gaps as insulation layers are designed,analyzed and simulated for applications in millimeter wave.The compact wideband equivalent-circuit model and passive elements(RLGC) parameters based on the physical parameters are presented with the frequency up to 100 GHz.The parasitic capacitance of TSVs can be approximated as the dielectric capacitance of air gaps when the thickness of air gaps is greater than 0.75 μm.Therefore,the applied voltage of TSVs only needs to achieve the flatband voltage,and there is no need to indicate the threshold voltage.This is due to the small permittivity of air gaps.The proposed model shows good agreement with the simulation results of ADS and Ansoft's HFSS over a wide frequency range.In this paper,ground-signal-ground type through-silicon vias(TSVs) exploiting air gaps as insulation layers are designed,analyzed and simulated for applications in millimeter wave.The compact wideband equivalent-circuit model and passive elements(RLGC) parameters based on the physical parameters are presented with the frequency up to 100 GHz.The parasitic capacitance of TSVs can be approximated as the dielectric capacitance of air gaps when the thickness of air gaps is greater than 0.75 μm.Therefore,the applied voltage of TSVs only needs to achieve the flatband voltage,and there is no need to indicate the threshold voltage.This is due to the small permittivity of air gaps.The proposed model shows good agreement with the simulation results of ADS and Ansoft's HFSS over a wide frequency range.

关 键 词:capacitance parasitic wideband dielectric millimeter depletion insulation circuits transistor conductance 

分 类 号:TN40[电子电信—微电子学与固体电子学]

 

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