11. Stick diagram gives the position of placement of the element.
A. true
B. false
Answer: B
The Stick diagram does not show the exact placement of components, transistor length, wire length and width, tub boundaries, etc.
12. When two or more cuts of the same type cross or touch each other, that represents ____________
A. contact cut
B. electrical contact
C. like contact
D. cross-contact
Answer: B
When two or more sticks of same type cross or touch each other, then that forms a contact called electrical contact.
13. Circuit design concepts can also be represented using a symbolic diagram.
A. true
B. false
Answer: A
Circuit design concepts can be represented using stick diagrams and symbolic diagrams. Stick diagrams represent different layers with color codes. The symbolic diagram represents the structure with symbols with color codes.
14. Circuit designers need _______ circuits.
A. tighter
B. smaller layout
C. decreased silicon area
D. all of the mentioned
Answer: D
Circuit designers in general prefer tighter, smaller layouts for improved performance and decreased silicon area.
15. Process engineers want ______ process.
A. smaller
B. tighter
C. reproducible
D. non-reproducible
Answer: C
Process engineers want design rules which are controllable and reproducible process.
16. Maturity level of the process line affects design rules.
A. true
B. false
Answer: A
Yes, the maturity level of the process line affects design rules.
17. Design rules does not specify __________
A. linewidths
B. separations
C. extensions
D. colors
Answer: D
Design rules specify line widths, separations and extensions in terms of lambda.
18. The width of the n-diffusion and p-diffusion layer should be?
A. 3λ
B. 2λ
C. λ
D. 4λ
Answer: B
The width of n-diffusion and p-diffusion should be 2λ according to design rules.
19. What should be the spacing between two diffusion layers?
A. 4λ
B. λ
C. 3λ
D. 2λ
Answer: C
The spacing between two diffusion layers should be 3λ according to design rules and standards.
20. What should be the width of metal 1 and metal 2 layers?
A. 3λ, 3λ
B. 2λ, 3λ
C. 3λ, 4λ
D. 4λ, 3λ
Answer: C
The width of the metal 1 layer should be 3λ and metal 2 should be 4λ.
21. Implant should extend _______ from all the channels.
A. 2λ
B. 3λ
C. 4λ
D. λ
Answer: A
Implant for an n-mos depletion-mode transistor should extend a minimum of 2λ from the channel in all directions.
22. Which type of contact cuts are better?
A. buried contacts
B. butted contacts
C. butted & buried contacts
D. none of the mentioned
Answer: A
Buried contacts are much better than butted contacts. In butted contacts, the two layers are joined together or bound together using an adhesive type of material whereas in buried contact one layer is interconnected or fitted into another.
23. Which design method occupies or uses a lesser area?
A. lambda rules
B. micron rules
C. layer rule
D. source rule
Answer: B
Micron rules occupy or consume the lesser area. 50% of the area usage can be reduced by using micron rules over lambda rules.
24. Which gives scalable design rules?
A. lambda rules
B. micron rules
C. layer rules
D. thickness rules
Answer: A
Lambda rules gives scalable design rules and micron rules give absolute dimensions.
25. Devices designed with lambda design rules are prone to shorts and opens.
A. true
B. false
Answers: b
Lambda design rules prevent shorting, open contact from slipping out of the area to be contacted.
