Optimization of the channel lateral strain profile for improved performance of multi-gate MOSFETs

L. De Michielis, K. E. Moselund, D. Bouvet, P. Dobrosz, S. Olsen, A. O'Neill, L. Lattanzio, M. Najmzadeh, L. Selmi, A. Ionescu
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Abstract

We report for the first time the optimization of the channel lateral strain profile as a new technological booster for improved performance of multi-gate n-channel MOSFET. We find that quasi-uniform or flat-Gaussian-close-to-the-drain profiles are optimum for the Ion boosting of sub-50nm scaled MOSFETs, while the penalty on Ioff and subthreshold slope is minimum. The reported predictions use realistic lateral uniaxial strain profiles, with peaks up to few GPa's and average values of hundreds of MPa's.
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改进多栅极mosfet性能的沟道横向应变分布图优化
本文首次报道了沟道横向应变分布的优化作为提高多栅n沟道MOSFET性能的新技术助推器。我们发现准均匀或平坦高斯-近漏极分布对于亚50nm尺度mosfet的离子增强是最佳的,而Ioff和亚阈值斜率的惩罚是最小的。所报道的预测使用了真实的横向单轴应变分布图,峰值可达几个GPa,平均值可达数百MPa。
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