Tue, 20100504 12:28 — Naser Ahmad Mohammad Abu_Zaid
Course Outline:

Introduction:charge; Current and current density; resistivity and conductivity; Ohm’s law; Electric and magnetic fields; Forces on charges; Potential and kinetic energy; One dimensional Gauss law; potential; one dimensional Poisson’s equation.

Basics:Drift velocity; mobility; Diffusion; mean free path and collision interval; semiconducting materials; energy quantization; Pauli exclusion principle; deBroglie wave length; Band theory of solids; Atomic bonding.

Semiconductors: Intrinsic semiconductors; Electrons and Holes; Doping; Extrinsic semiconductors; ptype and ntype; Fermidistribution and intrinsic Fermi level; Density of states; Electron and Hole number densities; Doped semiconductors and carrier concentrations.

Semiconductors in equilibrium:Diffusion and Drift current densities and the combined current equation; Einstein relation and constancy of the Fermi level; Carrier concentrations revisited; Equilibrium band diagrams; nonuniform doping; applied electric field; Space charge regions; Junctions.

Nonequilibrium semiconductors:Generation and recombination rates; Direct gap semiconductors; Indirect gap semiconductors; Minority carrier decay in time; Minority carrier decay in space; Diffusion equation and its solution.

PN junction diode:Charge distribution and the equilibrium band diagram; Forward and reverse biased junction and carrier motion; Biased band diagrams; Built in potential; minority carrier injection; Diode law; Drift and diffusion currents in the diode; Depletion region electrostatics and parameters; Break down mechanisms.

AC effects:Differential resistance; Junction capacitance; Diffusion capacitance; small signal equivalent circuit of a PN junction; Transient response and switching times; Real diodes; Rectifier diodes; small signal diodes; Zener diodes; Varactor diodes;