C-V profiling of ultrashallow junctions using a step-like background doping profile
2009
A novel C-V profiling method that enables profiling of ultrashallow and ultra-abrupt junctions is described. The method takes advantage of a peculiar shape of the C-V characteristic that is obtained with a step-like or other abruptly changing background profile. The method is analytically described and confirmed by MEDICI simulations. A step-like background As profile and an ultrashallow and ultra-abrupt p + junction were grown by respectively Si and pure boron RPCVD. Using these techniques, junctions with a doping depth of around 7 nm and with a slope of around 2.5 nm/dec were fabricated and measured.
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