EEE 436/591 HW 16 Due April 21, 2016 1. Draw the band diagrams of a MOS capacitor with an n-type semiconductor in the flat-band, accumulation, depletion, and inversion states. As in class, you can assume that the metal, oxide, and semiconductor have the same work functions. Label the gate voltage, Fermi potential, and surface potential in each case. 2. The DC block charge diagram of an ideal MOS capacitor is shown. (a) Is the semiconductor substrate n-type or p-type? Explain. (b) Is the device in accumulation, depletion, or inversion? (c) Draw the band diagram corresponding to the charge state pictured in the block charge diagram. MOS Wr x