Question

Factors on which threshold voltage depends

Answer 1

 The threshold voltage depends on: The workfunction difference between gate and channel, The gate voltage component to change surface potential, The gate voltage component to offset the depletion charge and fixed charges in gate oxide.

Answer 2

The value of the threshold voltage is dependent from some physical parameters which characterize the MOSFET structure such as: the gate material, the thickness of oxide layer tox, substrate doping concentrations (density) NA, oxide –interface fixed charge concentrations (density) Nox, channel length L, channel width W ...

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