We will cover the fundamental physical principles that govern the device operation and the application. Emphasis is placed on understanding background of the individual device operation. First part of the class will cover topics include basic carrier transports in semiconductors, including conduction electrons, and holes; Boltzman Transport Equation (BTE). Non-ideal properties of transistor, including heat, carrier scattering, defect trapping and recombination will be discussed in details. Latter part of the class will cover novel device physics and technology focusing front-end technology: MOSFET/FinFET/NSFET, Short Channel effect, ballistic transport, electron tunneling.