Answer / radhika

Cross section of NMOS is npn because nmos consists of p-substrate.and to form the gate we etched the upper layer of SiO2 from the substrate by masking of photoresist material and also to form source and drain we add n type impurities.hence the nmos cross section is npn .

Answer / rajesh

P N P

First P- substrate is taken and then N-channel is created
in that, so we call N-channel MOS transister.

Answer / dooce mcloose

n p n

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