Browsing by Author "Azizi, C."

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    Numerical analysis of GaAs MESFETs OPFET
    (Oum-El-Bouaghi University, 2011) Hamma, I.; Saidi, Y.; Zaabat, M.; Azizi, C.
    A Tow dimensional numerical model of channel potential for GaAs MESFET (Metal semiconductor field effect transistor) doped uniformly .the model takes into acount the effects in channel region considering both the photoconductive effect and photovoltaic effect at the gate schottky . the 2-D potential distribution function in the active layer of the divice is solved numerically under dark and illumination condition.
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    Study Of Different Parameters Effects On Threshold Voltage Of Cntfet
    (Oum-El-Bouaghi University, 2018) Khial, Aicha; Rechem, Djamil; Lagraf, F.; Azizi, C.
    In this paper, we have studied the effect of different parameters on threshold voltage of CNTFET devices using a numerical model developed with the Non-Equilibrium Greens Function approach in real space. In fact the work in hand involves the V_TH as a function of length gate taken from 10 nm to 30 nm for different temperature namely : 77 K, 150 K, 300 K, 400 K. then the variation of V_TH as a function of the nanotube diameter varying over the following chiralities : (13, 0), (16, 0), (19,0), (23, 0), (25, 0) was undertaken. Afterworlds, we conducted the variation of V_TH as a function of the oxide thickness with the values: 1.5 nm, 3 nm, 4.5 nm, 6 nm and 7 nm. Moreover, the V_TH was carried at depending upon the high-k materials such as: SiO_2, HfO_2, ZrO_2, 〖Ta〗_2 O_2 and TiO_2 And the source/drain doping used are 〖2.5 m〗^(-1), 〖4 m〗^(-1), 〖6 m〗^(-1), 〖8 m〗^(-1), and 〖10 m〗^(-1) (~0.01 dopant/atom). Finally, a conclusion is made basing at the different findings which revealed that the best reduce of V_TH was recorded under a liquid Nitrogen temperature of 77 K.