Subject :- Nano Technology


 

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MODEL QUESTION PAPER

  Subject: Nano Technology MODEL QUESTION PAPER Seventh Semester B.E. Degree Examination ECE BRANCH PART A MCQ (“ Multiple Choice Question .) 1.         Which one of the following is an advantage of nanotechnology? a)        Increased stability b)        Leakage of drug c)        Low solubility d)        All of the above 2.       What is Lithography? a)       Process used to transfer a pattern to a layer on the chip b)       Process used to develop an oxidation layer on the chip c)       Process used to develop a metal layer on the chip d)       Process used to produce the chip 3.       What is the standard form of SEM? a)        Scanning Electron Microscope b)        Scanning Electrode Microscope c)        Scanning Electrical Microscope d)        None of the above 4.       Which of the following application of tunnel diode has highest frequency of an solid based oscillator? a)       M
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Electron Beam Lithography

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Lithography  Lithography comes from the Greek words lithos means stone and grapho means write. Low dimensional structures are defined with writing patterns at micro/nano-meter scale designed by printing text or graphics on the surface of materials. Lithography is currently one of the most feasible techniques used for patterning micro/nanoscale features of desired designs with definite shapes, sizes and material compositions, selectively on the material of choice for device fabrication. Several lithographic methods are developed with different resolutions, reproducibility, speed, simplicity for processing, acquisition costs, etc., by using different sources of energy. The process of utilizing a light source for patterning is termed as photolithography and the utilization of energetic beams as a source is nomenclatured according to the type of energy source.  During semiconductor processing, the fabrication of micro/nano-structures rearranges the additives by deposition, subtractives by
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Types Of Microscope

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  What Are the Different Types of Microscopes? There are different types of microscopes and each of these has different purposes of use. Some are suitable for biological applications, while others are used in educational institutions. There are also microscope types that find application in metallurgy and studying three-dimensional samples. In this article, 5 such microscope types are discussed along with their diagram, working principles and applications. These five types of microscopes are: Simple microscope Compound microscope Electron microscope Stereomicroscope Scanning probe microscope Simple Microscope A simple microscope is defined as the type of microscope that uses a single lens for the magnification of the sample. A simple microscope is a convex lens with a small focal length. The magnifying power of the simple microscope is given as m= 1+ D/F Where, D is the least distinct vision F is the focal length of the convex lens Simple Microscope Diagram Principle of Simple Microsco
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