M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Nano-Technology
THIN FILM TECHNOLOGY
Time: 2½ Hours Max. Marks: 70
Instructions: Part-I, question 1 is compulsory.
Attempt any four questions from Part II
Figures to the right indicate full marks.
Answers to the Part I and Part II are to be written in same answer
booklet only.
PART I
Q.1 Rewrite the sentence after choosing correct answer from the given
alternatives:
07
is not a type of gas transfer pump.
Rotary pump Cryogenic pump
Turbo molecular pump 8 oil diffusion pump
can be used as roughing pump.
Rotary pump Cryogenic pump
Turbo molecular pump 8 oil diffusion pump
Pressure range between below 10-7 Pa is referred as
Low Vacuum Medium Vacuum
High Vacuum Ultra High Vacuum
is a pressure gauge working on the principle of ionization
of gas molecules.
Pirani Penning
Barometer Bourdon
In chemisorptions bonding takes place between interacting
surface and surrounding molecules.
Van Der Waal Hydrogen
Covalent a and b both
Usually, cryogenic temperature is
Below 0oK Above room temperature
Below 0oC Below 100oK
If the pressure in chamber drops from 1 millitorr to 0.001 militorr, the
mean free path of gas molecules inside the chamber
Decreases Increases
Remains same Cannot be measured
Q.1 Define/Explain the following terms in couple of sentences. 07
Chemical vapour deposition
Sputtering
LASER
Plasma
Sticking coefficient
Vapour Pressure
Adhesion
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SLR-VT-539
PART II
Answer any four of the following:
Q.2 Explain ion beam sputtering. 14
Q.3 Explain molecular beam epitaxy. 14
Q.4 Explain steps involved in CVD methods. 14
Q.5 Explain requirements of a better substrate and importance of substrate
cleaning for thin film deposition.
14
Q.6 Answer any two of the following: 14
Explain thermal evaporation.
Explain PLD techniques for synthesis of nano particles.
Explain working principle of pirani gauge.
Q.7 Attempt any two of the following:- 14
Write short note on physical vapour deposition.
Write short note on magnetron sputtering.
Write short note on physisorption and chemisorption.