The gate voltage at which the bands at the semiconductor surface of a MOS structure are flat. It is set by the work-function difference between gate and substrate and by charges in the oxide, and is one component of the threshold voltage.
Field: MOSFET
The flat-band voltage VFB is the gate voltage at which the semiconductor's bands at the surface are flat, given by VFB = φms − Qox/Cox (work-function difference and charge in the dielectric and at the interface).
Which correctly describes the flat-band voltage of a MOS st…In thermal equilibrium the Fermi levels of joined materials line up, which gives rise to the built-in potential of a pn junction and the flat-band voltage of a MOS structure.
What does the Fermi level mean?In metal-gate transistors, the gate metal's work function sets the flat-band voltage and thus the threshold.
In high-k/metal gate transistors, which is one of the main …Threshold voltage Numerical aperture (NA) Fermi level Built-in potential Work function Body effect Channel-length modulation CMOS DIBL GIDL (gate-induced drain leakage)