depletion region

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depletion region

[də′plē·shən ‚rē·jən]
(electronics)
The portion of the channel in a metal oxide field-effect transistor in which there are no charge carriers.

depletion region

In a transistor, the area where P-type silicon (holes) and N-type silicon (excess electrons) meet. See depletion mode.
References in periodicals archive ?
Like a troll at the foot of the bridge, the ion depletion zone prevents salt from passing through, resulting in the production of freshwater.
A depletion zone has historically been identified at the nearby Golden Crown reef being non-economic at surface, only reaching commercial grades below 100m vertical depth.
The 1993 program included geological mapping and RC drilling which was successful in identifying several significant gold intersections that indicate that the gold mineralization increases below the surface depletion zone and remains open at depth in the southern area of the property.
Gold mineralization at Old Glory is associated with sericite alteration in a strong sodium depletion zone.
The mineralization is contained within a large sodium depletion zone semi-coincident with a potassium radiometric anomaly (potassium radiometric anomalies occur over Hemlo and Winston Lake).
Two drill holes are planned in the 2011 program to test for sulphides below the interpreted depletion zone.
Some of the known gold lodes also show depletion zones closer to surface.
Microbial roles in global change include producing and consuming atmospheric gases that affect climate; mobilizing toxic elements such as mercury, arsenic, and selenium; and producing toxic algal blooms and creating oxygen depletion zones in lakes, rivers, and coastal environments (eutrophication).
Microbial roles in global change include producing and consuming atmospheric gases that affect climate; mobilizing toxic elements such as mercury, arsenic and selenium; and producing toxic algal blooms and creating oxygen depletion zones in lakes, rivers and coastal environments (eutrophication).
Many of the holes from this programme returned thicker and higher tenor results than intercepted by previous explorers closer to surface, possibly indicating depletion zones in the weathered profile.