On the drain current saturation in short channel MOSFETs

Submicron MOSFETs are the issue for ULSI integrated circuits. However, drastic reduction of device size leads to a complex modeling of the MOSFET drain current, which is affected by the electrical and physical phenomena induced by the low device dimension. Several current models are proposed to explain the drain current behavior in the saturation region of the ID–VD characteristic curve. Mainly, we can distinguish two types: long channel and short channel current modeling. In the present work, a survey of current voltage models is presented aiming a contribution to the interpretation of the current behavior in the saturation region of the I–V curves, i.e. non-saturation of the drain current, which are critical in submicronic devices.