38- For n-MOS capacitor, applying a large positive voltage below VT on the gate, results in the following (a) Creation of a depletion region with width W (b) Accumulation of electrons on the interface Oxide/Semiconductor (c) Accumulation of holes at the interface (d) Creation of a depletion region as well as the accumulation of electrons at the interface (e) Creation of a depletion region as well as the accumulation of holes at the interface (f) W is constant and = Wm 39- For n-MOS capacitor, applying a large positive voltage = VT on the gate, results in the following (a) Creation of a depletion region with width W (b) Accumulation of electrons on the interface Oxide/Semiconductor (c) Accumulation of holes at the interface (d) Creation of a depletion region as well as the accumulation of electrons at the interface (e) Creation of a depletion region as well as the accumulation of holes at the interface (f) W is constant and = Wm
Added by Tanaaz K.
Close
Step 1
It consists of a metal gate, an insulating oxide layer, and a semiconductor substrate, typically p-type. The gate voltage influences the charge distribution in the semiconductor. Show more…
Show all steps
Your feedback will help us improve your experience
Jennifer Stoner and 60 other Algebra educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
3.(18) The energy band diagram of an ideal MOS capacitor structure with oxide thickness, tox = 0.2m, operating at the temperature T = 300K is sketched below. Note that the voltage caused band bending such that EF = Ei at the oxide-silicon interface. a) What is the surface potential, Ď•s ? b) Sketch the electrostatic potential, Ď•, in the semiconductor as a function of the position, x. c) Sketch the electric field, E, in the semiconductor as a function of the position, x. d) What is the electron concentration at the oxide-silicon interface? e) Roughly sketch the electron concentration, n versus position, x, in the semiconductor. f) What is the doping level of the bulk?
Adi S.
The high-frequency $C-V$ characteristic curve of a MOS capacitor is shown in Figure $\mathrm{P} 10.30 .$ The area of the device is $2 \times 10^{-3} \mathrm{~cm}^{2}$. The metal-semiconductor work function difference is $\phi_{m u}=-0.50 \mathrm{~V}$, the oxide is $\mathrm{SiO}_{2}$, the semiconductor is silicon, and the semiconductor doping concentration is $2 \times 10^{16} \mathrm{~cm}^{-3}$. (a) Is the semiconductor $\mathrm{n}$ or $\mathrm{p}$ type? $(b)$ What is the oxide thickness? $(c)$ What is the equivalent trapped oxide charge density? $(d)$ Determine the flat-band capacitance.
The energy band diagram for an ideal MOS-C with a SiO2 thickness of 0.1 μm operated at T=300 K is sketched as follows. Note that the applied gate voltage causes band bending such that EF=Ei in the semiconductor at the Si—SiO2 interface. (a) (3 pts) Do equilibrium conditions prevail inside the semiconductor? Explain why. (b) (4 pts) Sketch the electrostatic potential (ϕ) inside the semiconductor as a function of position. (Hint: use the bulk of the semiconductor as a reference) (c) (3 pts) What is the sign of the voltage applied on the metal gate? (d) (3 pts) Is the device accumulation, depletion or inversion biased? Why? (e) (4 pts) Sketch the block charge diagram corresponding to the state pictured in the energy band diagram, and label the source of charges for different regions. (f) (8 pts) Calculate the surface potential, Fermi potential, and the electron concentration of the semiconductor at the Si-SiO2 interface, and the electron concentration in the bulk of the Si.
Recommended Textbooks
Elementary and Intermediate Algebra
Algebra and Trigonometry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD