Impact ionization in fully depleted (FD) Silicon On Insulator (SOI) n-Channel MOSFET is investigated as a function of the doping concentration. We have found that impact ionization increases with the decrease in the doping concentration and vice versa. Simulation results obtained from Sentaurus TCAD with the higher doping concentration can control the threshold voltage (Vth). Furthermore we have examined the effect of doping concentration on the transconductance (gm) and have observed that transconductance is inversely proportional of the doping concentration.
Kaleem Ullah: CSSP University of Punjab Lahore Pakistan,kaleem_758@yahoo.com
Saira Riaz, CSSP University of Punjab Lahore Pakistan,saira_cssp@yahoo.com
M.Habib, CSSP University of Punjab Lahore Pakistan,mhabiblhr@gmail.com
F.Abbas, CSSP University of Punjab Lahore Pakistan,fakhar.abbas30@yahoo.com
S.Naseem, CSSP University of Punjab Lahore Pakistan,shahzad_naseem@yahoo.com
I.Shah, CSSP University of Punjab Lahore Pakistan,ishfaq.pak@gmail.com
A.Bukhtiar, , CSSP University of Punjab Lahore Pakista,irfanbukhtiar@yahoo.com
K.Ullah S.Riaz M.Habib F.Abbas S.Naseem I.Shah A.Bukhtiar
[1] R. J. Luyken, T. Schulz, J. Hartwich, L. Dreeskornfeld, M. Steadele, W. Reosner, “Design considerations for fully depleted SOI transistors in the 25–50 nm gate length regime”, Solid-State Electronics 47 (2003) 1199–1203.
[2] J. B. Kuo, S. H. Lin, Wiley 2001
[3] H. Shang, M. H. White, “An ultra-thin midgap gate FDSOI MOSFET”, Solid-State Electronics 44 (2000) 1621-1625.
[4] R. Rao, N. DasGupta, A. Dasgupta, “Study of Random Dopant Fluctuation Effects in FD-SOI MOSFET Using Analytical Threshold Voltage Model”, IEEE Transaction and Material Reliability 10(2010) 247-253.
[5] M. J Gilbert, D. K. Ferry, “Discrete dopant effect in ultra small fully depleted ballistic SOI MOSFET”, Superlattices and Microstructures 34 (2003) 277-282.
[6] B. Jharia, S. Sarkar, R. P. Agarwal, “Analytical Study of Impact Ionization and Subthreshold Current in Submicron n-MOSFET”, Proceedings of the Sixth International Symposium on Quality Electronic Design 2005.
[7] X. Li, S. A. Parke, B. M. Wilamowski, “Threshold voltage control for deep Sub-micrometer Fully Depleted SOI MOSFET”, Proc. of the IEEE (2003) 284-287.
[8] M. K. Won, C. Choi, C. An, M. S. Kang, Y. S. Koo, “A Study on the Empirical Formulae of the Maximum Transconductance Variation in the
NMOSFET as a Function of the Back Bias and the DopConcentration”, Journal of the Korean Physical Society 39 (2001) S170_S172
[9] J. P. Colinge, “Silicon on Insulator Technology, Material to VLSI”, Springer, 3rd Edition, 2004.