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Theoretical determination of the temporal and spatial structure of α-particle induced electron-hole pair generation in silicon

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6 Author(s)
Oldiges, P. ; SRDC, IBM Corp., Hopewell Junction, NY, USA ; Dennard, R. ; Heidel, D. ; Klaasen, B.
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Physics-based modeling of the impact ionization process in silicon was performed to determine the time constants and radial distribution of electron-hole pairs after an α-particle strike. The radial distribution exhibited a Gaussian shape with a radius of approximately 50 nm. The impact ionization process took place over a period of less than approximately 500 fsec, implying time constants for use in semiconductor device simulations on the order of a few hundred fsec, a value much smaller than has been used in earlier device simulation work. Device simulations then show that the implication of using these shorter time constants is the creation of a higher concentration of electron-hole pairs at shorter times that cause stronger shunting effects for α-particle strikes between source and drain of MOS transistors

Published in:

Nuclear Science, IEEE Transactions on  (Volume:47 ,  Issue: 6 )

Date of Publication:

Dec 2000

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