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Conductivity modulation is a phenomenon which occur in

Conductivity modulation is a phenomenon which occur in Correct Answer Power MOSFET

Conductivity Modulation in MOSFET:

  • Conductivity modulation is process of doping to increase conductivity of semiconductor.
  • To provide a conductivity modulation MOSFET having a shortened turn off time while maintaining a low ON resistance.
  • A drain layer of a P+ type semiconductor substrate with a high impurity concentration functions as a layer injected with minority carriers.
  • An N+ type first buffer layer with a high impurity concentration is formed on this P+ type semiconductor. 
  • Power MOSFET is a specific type of MOSFET designed to handle high voltages and currents.
  • MOSFET is a voltage-controlled unipolar device.
  • In MOSFET the drain current is controlled by the Gate voltage and only kind of charge carriers (electrons or holes) conduct current in MOSFET hence it is a unipolar device.

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