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http://dx.doi.org/10.4313/JKEM.2016.29.12.750

Modeling and Simulation on Ion Implanted and Annealed Indium Distribution in Silicon Using Low Energy Bombardment  

Jung, Won-Chae (Department of Electronic Engineering, Kyonggi University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.29, no.12, 2016 , pp. 750-758 More about this Journal
Abstract
For the channel doping of shallow junction and retrograde well formation in CMOS, indium can be implanted in silicon. The retrograde doping profiles can serve the needs of channel engineering in deep MOS devices for punch-through suppression and threshold voltage control. Indium is heavier element than B, $BF_2$ and Ga ions. It also has low coefficient of diffusion at high temperatures. Indium ions can be cause the erode of wafer surface during the implantation process due to sputtering. For the ultra shallow junction, indium ions can be implanted for p-doping in silicon. UT-MARLOWE and SRIM as Monte carlo ion-implant models have been developed for indium implantation into single crystal and amorphous silicon, respectively. An analytical tool was used to carry out for the annealing process from the extracted simulation data. For the 1D (one-dimensional) and 2D (two-dimensional) diffused profiles, the analytical model is also developed a simulation program with $C^{{+}{+}}$ code. It is very useful to simulate the indium profiles in implanted and annealed silicon autonomously. The fundamental ion-solid interactions and sputtering effects of ion implantation are discussed and explained using SRIM and T-dyn programs. The exact control of indium doping profiles can be suggested as a future technology for the extreme shallow junction in the fabrication process of integrated circuits.
Keywords
Indium ion implantation; Sputtering; Annealing; Computer simulation;
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