Semiconductor meaning

sĕm'ē-kən-dŭk'tər, sĕm'ī-
The definition of a semiconductor is a material that is neither a good conductor or a good insulator but that conducts more electricity when heat, light or voltage is added.

An example of a semiconductor is silicon.

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A material that is neither a good conductor of electricity nor a good insulator, but has properties of electrical conductivity somewhere between the two. Silicon and germanium are good semiconductor materials. Dopants such as arsenic and antimony sometimes are introduced during the manufacturing process to alter the performance characteristics of the semiconductor. See also conductor, dopant, and insulator.
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Any of various solid crystalline substances, such as germanium or silicon, having electrical conductivity greater than insulators but less than good conductors, and used especially as a base material for computer chips and other electronic devices.
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(physics) A substance with electrical properties intermediate between a good conductor and a good insulator.
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An integrated circuit or other electronic component containing a semiconductor as a base material.
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Any of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. In semiconductors, thermal energy is enough to cause a small number of electrons to escape from the valence bonds between the atoms (the valence band ); they orbit instead in the higher-energy conduction band , in which they are relatively free. The resulting gaps in the valence band are called holes . Semiconductors are vital to the design of electronic components and circuitry, including transistors, laser diodes, and memory and computer processing circuits.
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A substance, as germanium or silicon, whose conductivity is poor at low temperatures but is improved by minute additions of certain substances or by the application of heat, light, or voltage: used in transistors, rectifiers, etc.
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A solid state material that can be electrically altered. Certain elements in nature, such as silicon, perform like semiconductors when chemically combined with other elements. Various optical materials can also change their state (see phase change disc).When electricity or light is applied to semiconductors, they change their state between conductive and non-conductive or reflective and non-reflective. The most significant semiconductor is the transistor, which in digital circuits works like an on/off switch. For analog applications, it may be an on/off switch as well, but is more likely used as an amplifier, taking in a low-voltage signal and outputting a higher voltage. See n-type silicon, doping, transistor concept and chip.
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