semiconductor

sem·i·con·duc·tor   (sěm'ē-kən-dŭk'tər, sěm'ī-)    n.   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. An integrated circuit or other electronic component containing a semiconductor as a base material. sem'i·con·duct'ing adj.

semiconductor

A material that conducts (see conduction) electricity, but very poorly. Silicon is the most common and familiar semiconductor. Devices made from semiconductors, such as the transistor, are the basis of the modern microelectric industry.

semiconductor 

Semiconductor

Another word for "chip." A semiconductor is a material such as silicon, which conducts electrical charges but not as well as metals such as copper and aluminum.

Investopedia Commentary

To recap: chip = semiconductor = integrated circuit. Semiconductors are used in computers, DVD players, cell phones, household appliances, and video games, along with many other products.

Related Links

Industry Handbook
The Advantage of Intermarket Analysis

See also: Book-to-Bill Ratio, Fabless Company, Philadelphia Semiconductor Index - SOX, Silicon Valley

Main Entry: semi·con·duc·tor
Pronunciation: -k&n-'d&k-t&r
Function: noun
: any of a class of solids (as germanium orsilicon) whose electrical conductivity is between that of a conductor and that of an insulator in being nearly as great as that of a metal at high temperatures and nearly absent at low temperatures

semiconductor   (sěm'ē-kən-dŭk'tər)  Pronunciation Key  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.

semiconductor electronics
A material, typically crystaline, which allows current to flow under certain circumstances. Common semiconductors are silicon, germanium, gallium arsenide. Semiconductors are used to make diodes, transistors and other basic "solid state" electronic components.
As crystals of these materials are grown, they are "doped" with traces of other elements called donors or acceptors to make regions which are n- or p-type respectively for the electron model or p- or n-type under the hole model. Where n and p type regions adjoin, a junction is formed which will pass current in one direction (from p to n) but not the other, giving a diode.
One model of semiconductor behaviour describes the doping elements as having either free electrons or holes dangling at the points in the crystal lattice where the doping elements replace one of the atoms of the foundation material. When external electrons are applied to n-type material (which already has free electrons present) the repulsive force of like charges causes the free electrons to migrate toward the junction, where they are attracted to the holes in the p-type material. Thus the junction conducts current.
In contrast, when external electrons are applied to p-type material, the attraction of unlike charges causes the holes to migrate away from the junction and toward the source of external electrons. The junction thus becomes "depleted" of its charge carriers and is non-conducting.
(1995-10-04)