Threshold voltage of a mos device

Question

Question 1: Define the term threshold voltage of a MOS device and describe its significance.

Question 2: Describe the effect of threshold voltage on MOSFET current Equations.

Question 3: Design a stick diagram for two input n-MOS NAND and NOR gates.

Question 4: Design a layout diagram for two input nMOS NAND gate.

Question 5: What do you mean by the term layout of a component?

Question 6: Draw neat layout diagrams for NMOS and PMOS transistor.

Question 7: A MOS Transistor in the active region measured to have a drain current of 20µA when VDS = Veff. When VDS is increased by 0.5V, ID increases to 23 µA. Estimate the out impedance rds, and the out impedance constant λ.

Question 8:

a) With neat sketches describe the formation of the inversion layer in P-channel Enhancement MOSFET.
b) An NMOS Transistor is operated in the triode region with the given parameters VGS = 4V; Vtn = 1V; VDS = 2V; W/L = 100; µnCox = 90 µA/V². Find its drain current and drain source resistance.

Question 9: Describe about the given two oxidation methods.

a) High pressure oxidation.
b) Plasma oxidation.

Question 10: What is a stick diagram and describe about different symbols used for components in stick diagram.