donor

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15:59 Nov 11, 2009

English to Catalan translations [PRO]
Science - Physics
Additional field(s): Electronics / Elect Eng

English term or phrase: donor

Definition from Tyco Electronics Corporation:
A material that is intentionally added to a pure semiconductor material in order to increase the population of free electrons in that semiconductor, resulting in a net negative charge. A semiconductor that has had donor material added to it is called "n-type."

Example sentence(s):

If there is a higher concentration of donors than acceptors, the semiconductor is n-type and the free electron concentration is approximately the difference between the two doping concentrations. everything2.com
The ionization energy of a donor atom is the energy required to dissociate the electron from the atom and put it in the conduction band of the crystal. answers.com
The doping with foreign atoms increases the conductivity of semiconductor crystals. By installing pentavalent foreign atoms (donors) one receives electron excess conductors (n-conductor). ledshift.com

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donador

Marta Valdés Enríquez

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donador

Definition from cercaterm de termcat.cat:
Àtom d'impuresa d'un semiconductor, sovint incorporat intencionadament, capaç de donar un dels seus electrons de valència. Aquest electró es constitueix en electró lliure o portador de corrent, mentre que l'àtom donador passa a ser un ió fix carregat positivament. En un semiconductor tetravalent com el silici, les impureses donadores habituals són àtoms pentavalents com ara el fòsfor.
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Àtom pentavalent (antimoni, fòsfor, arsènic) que s'afegeix com a impuresa a un semiconductor intrínsec i que és capaç de donar un electró que es constitueix en portador de corrent.

Example sentence(s):

Així, a la temperatura ambient pràcticament tots els “cinquens” electrons del material donador tenen prou energia per passar a la banda de conducció. - UPC
donador -a adj. i m. i f. 1 Que dóna. m. 2 Àtom present en l’estructura cristal·lina d’un semiconductor, capaç de donar un electró. m. 3 1 donador d’electrons Reductor 2 . 3 2 donador d’ions d’hidrogen Àcid 4 1 . 3 3 donador de parells d’electrons a) Lligand formador d’enllaços coordinats en els complexos. donador de parells d’electrons b) Base 10 . - Optimot / DIEC
La modulació de la conductivitat i, per tant, la possibilitat d’obtenir semiconductors de tipus p i de tipus n, s’aconsegueix, en general, introduint concentracions apropiades de dopants (impureses) en el semiconductor. Aquestes impureses poden ser donadors o acceptors. Els donadors són elements que presenten una càrrega de valència més elevada que la matriu que els hostatja i que, per tant, hi introdueixen electrons extra, o elements de càrrega negativa, i generen un material de tipus n. - IEC

Marta Valdés Enríquez
Spain
Local time: 19:25
Native speaker of:

Spanish

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