On the effect of polarization relaxation on dielectric breakdown

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED
Serge Blonkowski
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Abstract

This article discusses the effect of polarization relaxation on dielectric breakdown. We establish analytical statistical Weibull distributions, taking into account the changing local electric field instead of the usual static field in acceleration models. The time dependence of the local field is expressed using the universal Curie–Von Schweidler law. The derived distribution fits well with various observations on time-to-breakdown statistical distributions. In the case of voltage square pulse alternative stress, the calculated time to breakdown follows a power law with stress frequency, regardless of the field dependence of the acceleration model, consistent with observations. The dielectric lifetime is longer compared to continuous voltage stress, as observed in transistors and integrated capacitors. The analytical expression of the power law exponent depends on the field acceleration model and polarization current. It matches well with the measured values for metal–oxide–semiconductor and metal insulator metal capacitors with different dielectrics. The power law exponent increases with the static dielectric constant. The Weibull shape factor is shown to be lower in the AC mode than in the DC mode, as observed. The AC signal duty factor effect decreases the lifetime in the AC mode. Finally, we demonstrate that the consequence of polarization relaxation also affects the lifetime in the DC mode. The acceleration factor and lifetime projections are close to power laws with the field, regardless of the static field dependence of the acceleration model.
极化弛豫对介质击穿的影响
本文讨论了极化弛豫对介质击穿的影响。我们建立了分析统计 Weibull 分布,考虑到了不断变化的局部电场,而不是加速模型中通常的静态电场。局部电场的时间依赖性用通用的居里-冯-施韦德勒定律来表示。推导出的分布与时间-击穿统计分布的各种观测结果非常吻合。在电压方波脉冲替代应力的情况下,无论加速模型的场依赖性如何,计算出的击穿时间与应力频率成幂律关系,这与观测结果一致。与在晶体管和集成电容器中观察到的连续电压应力相比,介质寿命更长。幂律指数的分析表达式取决于场加速模型和极化电流。它与不同电介质的金属氧化物半导体电容器和金属绝缘体金属电容器的测量值非常吻合。幂律指数随静态介电常数的增加而增加。据观察,交流模式下的威布尔形状系数低于直流模式下的威布尔形状系数。交流信号占空比效应降低了交流模式下的寿命。最后,我们证明极化松弛的结果也会影响直流模式下的寿命。加速因子和寿命推算与磁场的幂律接近,与加速模型的静态磁场依赖性无关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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