Introduction to Semiconductors

Introduction to Semiconductors

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Description: Atomic Structures History of Semiconductor: - Electron Shells and Orbits: In an atom, the orbits are group into energy bands shells. Diff. in energy level within a shell << diff.

an energy between shells. Energy increases as the distance from the nucleus increases. Valence Electrons: Electrons with the highest energy levels exist in the outermost shell.

The electron in the valence shell called valence electrons. The term valence is used to indicate the potential required to removed any one of these electrons.

 
Author: Rosemizi B. Abd Rahim  | Visits: 388 | Page Views: 1225
Domain:  High Tech Category: Semiconductors 
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Contents:
EMT112
CHAPTER 1

Introduction to Semiconductor
By
En. Rosemizi B. Abd Rahim

Introduction to Semiconductor Chapter Outline :
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10

Atomic Structures
Semiconductors, Conductors, and Insulators
Covalent Bonds
Conduction in Semiconductor
N-Type and P-Type Semiconductor
The Diode
Biasing the Diode
Voltage Current Characteristic of a Diode
Diode Models
Testing a Diode

Introduction to Semiconductor Chapter Objectives :
Discuss basic operation of a diode

Discuss the basic structure of atoms
Discuss properties of insulators, conductors and
semiconductors

Discuss covalent bonding
Describe the properties of both p and n type materials
Discuss both forward and reverse biasing of a p-n
junction

1.1

Atomic Structures
History of Semiconductor

1.1

Atomic Structures
Atomic
number

basic
structure

Electron shells
ATOM

Valence electron

Free electron
ionization

1.1

Atomic Structures

smallest particle of an element contain 3 basic particles:

Protons
(positive charge)

Neutrons
(uncharged)

Electrons
(negative charge)

Nucleus
(core of atom)

ATOM

1.1



Atomic Structures

Atomic Number
Element in periodic table are arranged according to atomic number
Atomic number = number of protons in nucleus

1.1

Atomic Structures

Electron Shells and Orbits
-

In an atom, the orbits are group into energy bands – shells
Diff. in energy level within a shell