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Anna Materials Science Sem-II
Unit 4 : Electronic Materials(Classification of solids - energy bands - concept of Fermi level - conductor, semiconductor, insulator - Semiconductors- intrinsic, extrinsic - carrier concentration expression (qualitative) - compound semiconductors (qualitative) - dielectric materials - polarization mechanisms -
dielectric breakdown - magnetic materials - ferromagnetic materials &hysterisis - ferrites - superconducting materials, properties, types and applications) |
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| 1. Semiconductor Devices(Electronic Devices and Circuits) |
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In the last 25 years a number of solid state devices have come into use. Most of these devices use semiconductor crystals. Field of electronics has been revolutionized since the discovery of transistor in 1948. The vacuum tubes have been largely replaced by solid state devices. Technological development, such as invention of integrated circuits, has further increased the dependence on semiconducti
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Title: Electronics Devices and Circuits
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| 2. SEMICONDUCTOR PHYSICS(Basic Electrical Engineering
) |
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All matter consists of fundamental constituents or elements, the
tiniest particles of which are called atoms.
The atom consists of a central mass called the nucleus, around which
tiny, negatively charged particles, called electrons, revolve in fixed orbits,
just as satellites revolve around a planet.
Title: BASICS OF ELECTRICAL AND ELECTRONICS ENGINEERING
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| 3. Semiconductor Physics(Physics) |
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Distinction between metals, semiconductors and insulators based on band theory, Intrinsic and extrinsic semiconductors - concept of holes - effective mass, Expression for carrier concentration and Electrical conductivity- extrinsic semiconductors- impurity states in energy band diagram and the Fermi level.
Title: Concise Physics BSc V Semester Volume 6 (503)
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| 4. Semiconductor Materials and Physics(Solid State Devices and Technology) |
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The growth in Electronics and Communication has been tremendous with the invention of transistor and integrated circuit technology. The major cause of reduction in size, delay, power and cost in all areas of electronics and communication is the result of improved devices and technology. Semiconductors, metals and insulators are required for fabricating electronic devices, but the crucial role is p
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Title: Solid State Devices and Technology
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| 5. Semiconductor Diodes(Electronics) |
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All matters are made up of atoms. Every atom consists of a nucleus carrying a positive charge around which electrons move in orbits at certain distance from the nucleus. Each electron has a mass of 9.11 10−31 kg and a negative charge q equal to 1.602 10−19Coulombs.
Title: Electron Devices
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| 7. CHEMISTRY OF NEWER MATERIALS(UNIVERSITY CHEMISTRY) |
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Polymers are known to have good insulating property. Later discoveries shown that polymers
also conduct electricity like metals. They are called conducting polymers. Such compounds
may have metallic conductivity or can be semiconductors. The biggest advantage is that
conducting polymers can be easily processed by dispersion. Generally conducting polymers
are not thermoplastics. But, like insul
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Title: UNIVERSITY CHEMISTRY VOLUME - VI
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| 8. CHEMISTRY OF NEWER MATERIALS(Engineering Chemistry
) |
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Polymers are known to have good insulating property. Later discoveries shown that polymers
also conduct electricity like metals. They are called conducting polymers. Such compounds
may have metallic conductivity or can be semiconductors. The biggest advantage is that
conducting polymers can be easily processed by dispersion. Generally conducting polymers
are not thermoplastics. But, like insul
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Title: UNIVERSITY CHEMISTRY VOLUME - VI
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| 10. Dielectrics(Physics) |
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Static dielectric constant, polarizability (electronic, ionic and orientation), calculation of Lorentz field (derivation), Clausius-Mosotti equation (derivation), dielectric breakdown, electrostriction (qualitative), electrets. Piezo electric effect, cause, examples and applications
Title: Concise Physics BSc VI Semester Volume 7 (601)
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| 13. Engineering Physics Solved Question Papers First/Second Semester 2015-16(Engineering Physics
) |
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Reduction of Planck�s law to Wein�s law and Rayleigh Jeans law:
i) For shorter wavelengths, υ = c/λ is large.
When υ is large, ehυ/kT is very large.
.
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. e
hυ/kT >> 1
.
.
. (ehυ/kT
-1) ≈ ehυ/kT = ehc/λkT
Substituting in eqn 1:
Uλ dλ =
d
hc
5 hc/ kT e
8 1
=
C e d
T
C
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Title: Engineering Physics Model Question Papers First/Second Semester 2015-16
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| 14. Special Diodes(Electronics) |
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In previous chapter we studied about the construction and characteristics of pn junction diode. In this chapter we will study about some special diodes and their applications in detail.
Title: Electron Devices
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| 15. CONDUCTION AND BREAKDOWN IN LIQUID DIELECTRICS(Electrical ) |
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Liquid dielectrics are used mainly spreading through in high voltage cables and capacitors and for filling transformers, circuit breakers, etc.
Title: High Voltage Engineering
Published on: 11/10/18
Author:
Publisher:
Pages:
15
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| 16. Chapter 25(Physics) |
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Title: New Edges of Physics
Published on: 23/01/19
Author:
Publisher:
Pages:
12
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| 18. FINFET TECHNOLOGY(Electronics and Communication) |
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With increasing demand for the portable devices like mobiles, ipads etc. there is a demand for low power devices which require small area and high speed device operation. Low power has become the topic of research for the VLSI engineers.
Title: DESIGNING WITH FINFETS
Published on: 05/03/19
Author:
Publisher:
Pages:
29
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| 20. SolvedVTU Engineering Physics Model question paper-2(VTU Engineering Physics) |
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Title: VTU Engineering physics
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| 21. Integrated Circuit Fabrication(Electronics) |
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The first integrated circuits (ICs) were manufactured independently by two scientists: Jack Kilby of Texas Instruments and Robert Noyce of Fairchild semiconductors. Integrated circuits were made possible by continued experimental discoveries which showed that semiconductor devices could perform the functions of vacuum tubes.
Title: Electron Devices
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| 23. Passive Circuit Components(Electronics) |
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The electronic components are divided into two categories i) Active components ii) Passive components. Active components are those components which have the ability to supply energy to the circuit. Examples are voltage and current sources. On the other hand passive components are those components which absorb energy. Resistors, capacitors and inductors are examples of passive components. In this c
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Title: Electron Devices
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| 24. Nanomaterials(Physics) |
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Synthesis techniques (Top down & bottom up) - electron confinement. Size effect - surface to volume ratio; distinction between nanomaterials & bulk materials in terms of energy band. Distinct properties of nanomaterials. Classification of nano systems - quantum dots, nanowires and nano films, Multilayered materials - Graphene, Fullerene Carbon nano tube (CNT). Application of nano materials
Title: Concise Physics BSc VI Semester Volume 7 (601)
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| 25. Superconductivity(Physics) |
Total View (153) |
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Introduction-Experimental facts-zero resistivity- The critical field- The critical current density- Meissner effect- Type I and type II superconductors - BCS theory (qualitative)
Title: Concise Physics BSc V Semester Volume 6 (503)
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