Simple atomistic modeling of dominant B m I n clusters in boron diffusion |
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Authors: | J-H Yoo C-O Hwang B-J Kim |
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Institution: | Inha University, National IT Research Center for Computational Electronics, Department of Electrical Engineering, School of Engineering , 253 Yonghyun-dong, Nam-gu, Incheon, 402-751, South Korea |
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Abstract: | In this paper, we present a simple atomistic model for describing the evolution of interstitial clusters during boron diffusion in kinetic Monte-Carlo (KMC) calculation. It has been known that clusters generated after ion implantation play a decisive role in the enhanced boron diffusion at the tail region while being immobile at the peak region. Our model, which is based on the simple continuum model, takes the intermediate clusters into account as well as dominant clusters for describing the evolutionary behavior of interstitial clusters during boron diffusion. We found that the intermediate clusters such as B3I3 and B2I3 play a significant role during the evolution of clusters despite the fact that the lifetimes of the corresponding intermediate clusters are relatively short due to low binding energies. Further, our investigation revealed that B3I is the most dominant cluster after annealing. We applied our simple atomistic model to the study of boron retardation in arsenic pre-doped substrate. KMC simulation results were compared with experimental SIMS data, which supports our theoretical model. |
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Keywords: | Atomistic simple model Kinetic-Monte Carlo Boron diffusion Boron retardation |
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