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ocr_text: Velocity Saturation & Mobility Degradation\n» The electron drift velocity in the channel is 3 Fd £\nproportional to the electric field @ low Z| AR - 2 -\nelectric field values. oe :\n» It starts to saturate at high E. velocity :\nsabwbation (Vsat). V = pE :\n» For short channel devices, the longitudinal H\nelectric field increases. At high E, the velocj\nsaturation affects the I-V characteristics &f E (V/cm) E L Vertical\nthe MOSFET. Electric Field\nCITY SATURAT! MOBILITY DEGRADATION\n» For the same Vgs (gate voltage), the saturation VELOCTTE SATURATION\nmode is reached at smaller values of Vps and _\nleads to saturation current reductions. ] prey\nE A ~\n» Due to higher vertical electric fields, the -~ on ee ee\ncarriers of the channel scatter off of the oxide LE 7 Gry”\n===) This results in the degradation of carrier 3 Jew\nmobility and the reduction in drain current. 7“ PE po\n[R. Trew, « High-Frequency Solid-State Electronic Devices », 01 0 CE ERA\n] IEEE Trans. on Elec. Devices(2005), 10.1109/TED.2005.845862] 1 2 eres oven Tool
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