Chapter 4
I. Introduction
Everything has a purpose regardless of what is its nature. We are all created by God with specific purposes. Somewhat, these can be visualized with our mission to this world. Some of us become teachers,engineers, policemen and any other non- professional or professional works. Regardless of the name of their jobs, they serve and control the economic growth of our country. Just like in the field of electronics, there are also certain element that are widely used in controlling the current of the circuit. They are called to be semiconductors.
II. Definition
Semiconductor is known to be the circuit element which do not fall under insulators or conductors but they have the characteristics of the two. This can act as insulator which does not have free electrons to move and as conductors which has free electrons to move. This is commonly made of silicon and germanium.
III. Types of Semiconductor
A. Intrinsic semiconductor
This is a pure semiconductor and called to be a poor conductor hence its negative and positive charges carriers are equal and they cannot cause great potential difference.
B. Extrinsic Semiconductor
This is a semiconductor that needs outside forces to conduct the flow of charges. There is a process which is called to be doping that will increase its impurities and the conductivity can be controlled.
Because of the process of doping, extrinsic semiconductors are classified into two. They are in accordance with the impurities.
1. P-Type semiconductors.
Semiconductors which are rich in holes or positive charges.
2. N-type semiconductors
Semiconductors which are rich in negative charges or have excess number of electrons.
Semiconductors which are rich in negative charges or have excess number of electrons.
IV. Applications of Semiconductors
Semiconductors are widely used as a circuit element because the amount of current can easily be manipulated for the desired quantity. In other words, these can minimize overheating of appliances or gadgets. These are embedded in the different circuits found in computer, cellphones, microphones, speakers and any other devices which are used with electricity.
V. References
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