Patent ID: 7859289

Claim:
A method for measuring interface traps in a MOSFET, comprising: measuring gate-to-substrate or gate-to-source/drain current for a pulse waveform applied to a gate of the MOSFET for various frequencies over a predetermined frequency range; plotting first points of the measured current versus the various frequencies; extracting a first slope and a first intercept with the measured current axis of a linear regression fit of the plotted first points, the first intercept giving a duty cycle dependent term of a tunneling current contribution to the measured current; plotting second points of the first intercept versus duty cycle for a fixed rise time, fall time, highest voltage and lowest voltage for the pulse waveform; extracting a second slope of a linear regression fit of the plotted second points; using the extracted second slope to correct for a first frequency dependent term of the tunneling current contribution; using measured current versus gate voltage curves to compute an integral in a second frequency dependent term of the tunneling current contribution; and subtracting the first and second frequency dependent terms from the extracted first slope to obtain the charge pumping current contribution to the measured current.