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Semiconductor in which one type of impurity or imperfection (for example, donor) partially cancels the electrical effects on the other type of impurity or imperfection (for example, acceptor).

Related Terms

SOFTENING

The act of reducing scale-forming calcium and magnesium impurities from water.

MANGANESE

A metallic element occasionally found in very small amounts as an impurity in well-water supplies.

TOTAL SOLIDS CONCENTRATION

The weight of dissolved and suspended impurities in a unit weight of boiler water, usually expressed as ppm.

SULPHUR

An element, symbol S, yellow in appearance. Considered as a combustible impurity in coal.

ALLOY JUNCTION

A junction produced by alloying one or more impurity metals to a semiconductor to form a p or n region, depending on the impurity used. Also known as fused junction.

DOPING AGENT

An impurity element added to semiconductor materials used in crystal diodes and transistors. Also known as dopant; dope.

DOPED JUNCTION

A junction produced by adding an impurity to the melt during growing of a semiconductor crystal.

EXTRINSIC DETECTOR

A semiconductor detector of electromagnetic radiation that is doped with an electrical impurity and utilizes transitions of charge carriers from impurity states in the band gap to nearby energy bands.

HOLE TRAP

A semiconductor impurity capable of releasing electrons to the conduction or valence bands, equivalent to trapping a hole.

MICROALLOY TRANSISTOR

1. A transistor in which the emitter and collector electrodes are formed by etching depressions, then electroplating and alloying a thin film of the impurity metal to the semiconductor wafer, somewhat as in a an electrode with a microscopic tip dimension that may be placed adjacent to or inside a cell for the purpose of recording the electric potentials of single cells, passing electrical currents, or injecting electrically charged substances into the cell. 2. In physical chemistry, a minute electrode used to perform electrolysis of small quantities of material.
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