The MOS structure

The MOS structure

Band diagram

� Ideal case (EF already at the same level)

� Example with Si-P

� Example with Si-N

� If the Fermi levels are not aligned, even with VG=0 the

bands are bent

� Let us define VFB as the VG which flattens the bands;

with VG=VFB we can repeat what we said for the ideal

MOS, with VG translated by VFB.