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Growth of epitaxial silicon by hot-wall chemical vapor deposition (CVD) technique and its thermochemical analysis  

윤덕선 (영남대학교 응용화학공학부)
고욱현 (영남대학교 응용화학공학부)
여석기 (영남대학교 응용화학공학부)
이홍희 (서울대학교 응용화학부)
박진호 (영남대학교 응용화학공학부)
Abstract
Epitaxial Si layers were deposited on (100) Si substrates by hot-wall chemical vapor deposition (CVD) technique using the $SiH_2Cl_2/H_2$chemistry. Thermochemical calculations of the Si-H-Cl system were carried out to predict the window of actual Si deposition process and to investigate the effects of process variables (i.e., deposition temperature, reactor pressure, and input gas molar ratio ($H_2/SiH_2Cl_2$)) on the epitaxial growth. The calculated results were in good agreement with the experiment. Optimum process conditions were found to be the deposition temperature of 850~$950^{\circ}C$, the reactor pressure of 2~5 Torr, and the input gas molar ratio ($H_2/SiH_2Cl_2$) of 30~70, providing device-quality epitaxial layers.
Keywords
Chemical Vapor Deposition (CVD); Epitaxy; Hot-wall reactor; Thermochemical analysis;
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