21. Which layer has high capacitance value?
A. metal
B. diffusion
C. silicide
D. polysilicon
22. Which layer has a high resistance value?
A. polysilicon
B. silicide
C. diffusion
D. metal
23. While measuring the output load capacitance Cgs, n and Cgs, p is not considered. Why?
A. Because Cgs, n and Cgs, p are the capacitances at the input nodes
B. Because Cgs, n and Cgs, p does not exist during the operation of CMOS inverter
C. Because Cgs, n and Cgs, p are storing opposite charges and cancel out each other during the calculation of load capacitance
D. None of the mentioned
24. During the calculation of load capacitance of a 1st stage CMOS inverter, the input node capacitances, Cgs, n and Cgs, p of the 2nd stage CMOS inverter are also considered.
A. True
B. False
25. The resistance of the uniform slab of the conducting material is?
A. Linear(proportional) with length
B. Inversely proportional to the thickness
C. Inversely proportional to the width
D. All of the mentioned
26. The sheet resistance of the conducting material is?
A. RS = resistivity/length
B. RS = resistivity/width
C. RS = resistivity/thickness
D. None of the mentioned
27. In CMOS manufacturing process Sheet resistance is used instead of resistivity because _______________
A. Resistivity is the same for all doped regions
B. Resistivity and thickness are characteristics that cannot be controlled by the circuit designer, and it is expressed as the single sheet resistance parameter
C. Sheet resistance is a dimensionless quantity
D. Sheet resistance is equal to resistivity
28. Compute the sheet resistance of a 0.17 µm thick Cu wire if the resistivity of Cu wire is 1.7 µΩ-cm.
A. 0.01 Ω/square
B. 0.001 Ω/square
C. 10.0 Ω/square
D. 0.10 Ω/square
29. For semiconductors doped through diffusion or through surface peaked ion implantation we derive the sheet resistance as ___________
A. Average resistivity of semiconductor/thickness
B. Resistivity/thickness
C. Conductivity/thickness
D. None of the mentioned
30. Sheet resistance of a semiconductor is ___________
A. Inherent property of the material
B. Function of the thickness of the material
C. Also called Specific Resistance
D. All of the mentioned