Diffusion of Phosphorus and Boron from Atomic Layer Deposition Oxides into Silicon
Diffusion of Phosphorus and Boron from Atomic Layer Deposition Oxides into Silicon
复制标题
磷和硼从原子层沉积氧化物扩散到硅中
DOI:
10.1002/pssa.201900306
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
R. Hübner
中科院分区:
文献类型:
--
作者:
S. Beljakowa;P. Pichler;B. Kalkofen;R. Hübner
Oxides containing group III or group V elements (B2O3/Sb2O5and P2O5/Sb2O5) are grown by plasma‐assisted atomic layer deposition (ALD) on single‐crystalline silicon and serve as dopant sources for conformal and shallow doping. Transport phenomena in ALD‐oxide–Si structures during rapid thermal annealing (RTA) are investigated subsequently by X‐ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and secondary ion mass spectrometry (SIMS). The XPS and TEM analyses of the annealed ALD‐oxide–Si structures demonstrate that the ALD oxide converts to a silicon oxide and partially evaporates during annealing. In addition, dopant‐containing, spherical, and partially crystalline particles form in the oxide, and Si‐P precipitates at the oxide–Si interface. After diffusion annealing at 1000 °C, the SIMS analyses reveal phosphorus and boron concentration profiles in the silicon substrate with maximum concentrations exceeding their solid solubility limits by roughly one order of magnitude. Experimental doping profiles of phosphorus and boron in silicon are compared with simulation results, considering a slight injection of self‐interstitials and dynamical defect clustering.
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期刊:
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DOI:
--
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2018
期刊:
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