Linear Integrated Circuits Questions and Answers
Q1.
The process involved in photolithography is
Answer :
Photo etching and making of photographic mask
Q2.
In the fabrication of monolithic ICs, Boron chloride is added as an impurity in the diffusion process. Find the diffusion time, if the furnace is heated up to 1200 Degree C.
Answer :
2 hours
Q3.
Which isolation technique is used in applications like military and aeroscope?
Answer :
Dielectric isolation
Q4.
What will be the next step after slicing (process) silicon wafers?
Answer :
1. Lapping
2. Polishing
3. Chemical
Q5.
Why monolithic IC transistor is preferred over discrete planar epitaxial transistor?
Answer :
1. Due to structural difference
2. Increase in VCE (sat) and collector series resistor
3. Improvement in circuit performance
Q6.
Which method is used in the fabrication of pnp transistor?
Answer :
1. Vertical substrate pnp
2. Triple diffused pnp
3. Lateral pnp
Q7.
In Schottky barrier diode, which contact has similar characteristics to that of an ordinary PN diode?
Answer :
Schottky barrier contact
Q8.
Which of the following is not true about diffused resistor?
Answer :
Diffused resistors are non-economical
Q9.
Which is considered to be a serious disadvantages of thin film capacitor, when Al2O3is used as dielectric.
Answer :
It require over voltage protection
Q10.
When does an integrated circuit exhibit greater degree of freedom and electrical performance?
Answer :
In semiconductor and films technology
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