# Explanation of NMOS processes

So, gate (poly-si + $SiO_2$) and $p^{-}$ silicon operate as capacitator.

But how are voltages and charges are applied? In order for inversion to occur, there should be charges formed in poly-Si, right? So how does it work?

Or if I am mistaken, can anyone explain the process? (Both NMOS and PMOS would be appreciated.)

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 Can anyone help on this? – user27515 Jan 13 at 6:47 Perhaps electronics.stackexchange.com is a better home? – Qmechanic♦ Jan 13 at 7:50