nMOS transistor surface inversion

Thread Starter

jayec1a

Joined Feb 28, 2012
6
I am studying the working of nMOS transistor, where i came across a statement

"As the Gata bias voltage increases, the Mid-gap energry level goes below the Fermi level which results in the conversion of p-type substrate into n-type"

Now i am not able to understand the 'midgap level goes below fermi level' part of the statement.

Note: my reference book is 'CMOS integrated circuits' by Sung-Mo Kang.
 
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