材料科学
再结晶(地质)
退火(玻璃)
硅
成核
兴奋剂
小丘
薄膜
掺杂剂
绝缘体上的硅
表面粗糙度
离子注入
光电子学
分析化学(期刊)
复合材料
纳米技术
化学
生物
离子
古生物学
有机化学
色谱法
作者
Nicolas Chery,M. Zhang,Richard Monflier,Nicolas Mallet,G. Seine,Vincent Paillard,J. M. Poumirol,Guilhem Larrieu,A.S. Royet,S. Kerdilès,P. Acosta-Alba,Michele Perego,C. Bonafos,F. Cristiano
摘要
A thorough study of the phosphorus (P) heavy doping of thin Silicon-On-Insulator (SOI) layers by UV nanosecond Laser Thermal Annealing (LTA) is presented in this work. As a function of the implant dose and laser annealing conditions, the melting regimes and regrowth processes, as well as the redistribution and activation of P in the top-Si amorphized layer, were investigated. The findings emphasize the critical role of the thin crystalline silicon layer that remains after the top-Si layer amorphizes, as it provides nucleation seeds for liquid phase recrystallization. The effect of the implant dose on the recrystallization process is thoroughly investigated in terms of melt energy thresholds, crystallographic nature of the resolidified layer, defect formation, surface roughness, and the formation of hillocks on the silicon surface. Optimized laser annealing conditions, corresponding to the laser energies just preceding the onset of the full melt, were identified for all implanted doses. Such optimized layers have perfect crystallinity, negligible P out-diffusion, a nearly perfectly flat P depth profile located below the segregation-induced surface pileup peak, and dopant active concentrations well above 1021 cm−3, which is close to the highest reported values for phosphorus in bulk Si substrates.
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