Definition Of Diffusion Semiconductor
The diffusion current can be defined as the charge carriers within a semiconductor like holes or electrons flow from high concentration state to low concentration state.
Definition of diffusion semiconductor. Diffusion describes the movement of atoms through space primarily due to thermal motion and it occurs in all forms of matter. In a semiconductor charge carriers naturally no applied voltage or electric field move from a region of higher concentration to a region of lower concentration. February 2019 diffusion current is a current in a semiconductor caused by the diffusion of charge carriers holes and or electrons. The major driving force for the study of diffusion in semiconductor materials is the technological importance of the diffusion process step for integrated circuit ic fabrication.
Diffusion current is mainly generated in semiconductors the doping done in the semiconductors is non uniform. Because of undesirable and unpredictable diffusion phenomena modern process technologies try to reduce diffusion by decreasing the thermal budget. This process generally doesn t occur in conductors. In order to achieve uniformity the flow of charge carriers takes place from higher concentration area to lower concentration area.
This is the current which is due to the transport of charges occurring because of non uniform concentration of charged particles in a semiconductor. Diffusion is the net movement of anything for example atom ions molecules from a region of higher concentration to a region of lower concentration. Diffusion is driven by a gradient in concentration. The process by which charge carriers electrons or holes in a semiconductor moves from a region of higher concentration to a region of lower concentration is called diffusion.
This movement is called diffusion and it occurs to maintain thermal equilibrium.