MOS-C VFB Calculation: Comparison of Theoretical and Simulation Values (Instructor Copy)

By Stella Quinones

University of Texas at El Paso

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The flatband voltage is calulated based on device physics theory and is compared to the value determined from the simulation of a MOS-Capacitor using the MOSCap simulation tool on the website. By completing this exercise, the student is able to compare the mathematical model of the gate voltage of a MOS-Capacitor to the interpretation of the energy band diagram of a MOS-Capacitor. The example includes the simulation of a MOS-Capacitor with a p-type substrate and an n+poly silicon gate.