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Term paper on semiconductor

Semiconductors are materials that have properties of both normal conductors and insulators. Semiconductors fall into two broad categories:. In the classic crystalline semiconductors, electrons can have energies only within certain bands ranges of energy levels. The energy of these bands is between the energy of the ground state and the free electron energy the energy required for an electron to escape entirely from the material. The energy bands correspond to a large number of discrete quantum states of the electrons. Most of the states with low energy closer to the nucleus are occupied, up to a particular band called the valence band.
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ON Semiconductor SWOT Analysis / Matrix

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Semiconductors and Modern Defense Spending | Center for Strategic and International Studies

Show Explanation. Lies between that of. Semiconductors are those materials which have electrical conductivities lying between those of good conductors and insulators. A semiconductor atom having four valence electrons and four holes require four more electrons so as to make the outermost orbit completely filled total number must be eight. The atoms in a crystal are arranged so closely that electrons orbit in valence shells of two atoms. Each valence shell electron fills the hole of the neighboring atom as shown in Fig. In the figure, atoms of silicon material have been shown.
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Organic Semiconductors

A semiconductor is a material with an electrical conductivity that is intermediate between that of an insulator and a conductor. Commonly used semiconducting materials are silicon [2] , germanium [3] , gallium arsenide [4] and indium phosphide. A semiconductor behaves as an insulator at very low temperature, and has an appreciable electrical conductivity at room temperature although much lower conductivity than a conductor. A semiconductor can be distinguished from a conductor by the fact that, at absolute zero , the uppermost filled electron energy band is fully filled in a semiconductor, but only partially filled in a conductor.
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In: Business and Management. They achieved immediate success with products that were composed of semiconductors, while they also sold semiconductors. They quickly achieved market dominance in the communications sector. Over time, Mitel was sold and resold with its share value increased, decreased, and then increased again but to only a fraction of what it used to be. Mitel continued to be a company that stayed rooted to its initial specialities in the communications industry.

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