Symbols of D-MOSFET

D-MOSFET are two types which are following belows;

N-channel D-MOSFET:

This figure shows the symbol of N-channel D-MOSFET.It consist gate terminal,drain terminal source terminal and sunstrate terminal.In this N-channel D-MOSFET free electrons contributes current flows through the conducting channel from source terminal to drain terminal if the drain terminal is connected positive potential w.r.t source terminal.In N-channel D-MOSFET gate terminal exists like a one plate of capacitor plate and conducting channel exists like another plate of capacitor and oxide layer on the left side of the device acts as dielectric .In this N-channel D-MOSFET gate terminal lead taken out from left side of N-channel D-MOSFET where as drain terminal lead taken out from the top .In the N-channel D-MOSFET the source terminal lead taken out form the bottom of the N-channel D-MOSFET.In this N-channel D-MOSFET the arrow head point to substrate inwards .Hence this symbol is called N-channel D-MOSFET.

P-channel D-MOSFET:

This figure shows the P-channel D-MOSFET .Just arrow head is different than symbol of N-channel D-MOSFET and all other are same .In this P-channel D-MOSFET tha arrow head is point to outwards of the substrate and holes contributes current in the P-channel D-MOSFET. The conducting channel is made by P-type material and substrate is made by N-type of material and all other construction is similar to that of N-channel D-MOSFET.