A MOS capacitor has 300 Angstroms oxide thickness and silicon substrate with 10E16 cm^−3 acceptor density. When the semiconductor surface is at the onset of strong inversion, determine the surface potential. Answer: A MOS capacitor has 300 Angstroms oxide thickness and silicon substrate with 10E16 cm^−3 acceptor density. The oxide permittivity is 3.9×8.85E−14 F/cm. When the semiconductor surface is at the strong inversion, determine the oxide capacitance per unit area in F/cm^2