Threshold voltage of the MOSFET is defined as that gate voltage at which the channel gets inverted or effective channel formed.Inverted in the sense that for NMOSFET.
Number of electron at interface when channel is formed is equal to as many number of hole before channel formed at interface.
Suppose when channel was not formed number of hole were 100 hole/cm3 at the interface then after channel formed electron will be 100 electron/cm3 at the interface.
where
Difference between the metal and semiconductor workfunctions
Hence
Threshold voltage of the device is dependent on the process parameter or material dependent.
Comments
Post a Comment