Patent ID: 9632115
Date: 2017-04-25
CPC Classifications: G01R

Claim:
1. A method for deriving characteristic values of a MOS transistor, wherein the MOS transistor comprises a substrate, a gate, a channel region, a source and a drain, a threshold voltage of the channel region is V t , a voltage applied to the substrate is V B , a voltage applied to the gate is V G , a voltage across the source and the drain is V DS , a voltage across the gate and the source is V GS , a V GS making the MOS transistor operate in a constant-mobility region is V GS _ c , a current from the drain to the source is I DS , and a sum of a resistance R D of the drain and a resistance R S of the source is RSD, the method comprising: a) applying different V b) measuring I c) giving respective initial values of V d) calculating RSD with a given η value, V e) applying a series of V V GS _ a1 is the V GS at a cross point on the V GS axis with a tangent line extrapolated from a point of the V GS −I DS1 _ exclude _ RSD curve where dI DS1 _ exclude _ RSD /dV GS is maximal, and V GS _ a2 is the V GS at a cross point on the V GS axis with a tangent line extrapolated from a point of the V GS −I DS2 _ exclude _ RSD curve where dI DS2 _ exclude _ RSD /dV GS is maximal; f) calculating V and g) repeating the steps d), e) and f) several times until RSD, V