Electronic Devices-Integrated Circuit Fabrication Process [GATE (Graduate Aptitude Test in Engineering) Electronics & CE (EC)]: Questions 1 - 3 of 12

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Question 1

Electronic DevicesIntegrated Circuit Fabrication ProcessOxidation, Diffusion, Ion Implantation

Appeared in Year: 2018

Question MCQ▾

Which of the following statements are correct?

1) CMOS has higher speed and smaller power than BJT.

2) CMOS ICs inputs should never be left unconnected as it may damage the device.

3) CMOS ICs with Schmitt trigger inputs are used for better noise immunity.

4) CMOS is most popular logic family in VLSI Technology. (July)

Choices

Choice (4)Response

a.

1) , 2) and 4) are correct

b.

2) , 3) and 4) are correct

c.

1) , 3) and 4) are correct

d.

1) , 2) and 3) are correct

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Question 2

Electronic DevicesIntegrated Circuit Fabrication ProcessOxidation, Diffusion, Ion Implantation

Appeared in Year: 2018

Question MCQ▾

25 In a Silicon oxidation model, if is the gas phase mass transfer co-efficient, is the oxidant concentration in the bulk of the gas and is the oxidant concentration of adjacent to the oxide surface, then for steady state, the gas phase flux can be expressed as:

Of these statements. (July)

Choices

Choice (4)Response

a.

3) is correct but 1) is wrong

b.

2) is correct but 4) is wrong

c.

1) , 2) and 3) are correct but 4) is wrong

d.

1) and 3) are correct

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Question 3

Electronic DevicesIntegrated Circuit Fabrication ProcessPhotolithography and Twin-Tub CMOS Process

Appeared in Year: 2018

Question Assertion-Reason▾

Assertion(Ꭺ)

For integrated circuit production, the line width limit of optical Lithography lies near , although feature may eventually be printed under carefully controlled conditions. (July)

Reason(Ꭱ)

A negative resist on exposure to light becomes less soluble in a developer solution, while a positive resist becomes more soluble.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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