In semiconductor production, doping is the intentional introduction of impurities into an intrinsic semiconductor for the purpose of modulating its electrical properties. The doped material is referred to as extrinsic semiconductors. A semiconductor doped to such high levels that it acts more like a conductor than a semiconductor is referred to as a degenerate semiconductor. Wikipedia, Doping

See Also

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Constructive Interference
destructive interference
interatomic interference
Interference
molecular interference
nodal interference
Sympathetic Negative Interference
terrestrial interference
VIBRATIONAL INTERFERENCE
vibratory interference ratio
modulation
sediment