Properties of Semiconductors (Leaving Cert Engineering): Flashcards
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Practise the cards
13 cards from this deck
Electrical properties of semiconductors are positioned...
Electrical properties of semiconductors are positioned...
Between conductors and insulators
Most widely used semiconductor material
Most widely used semiconductor material
Silicon
Three regions in energy band diagram
Three regions in energy band diagram
Valence band, conduction band, band gap
Band gap size in metals
Band gap size in metals
eV (overlapping bands)
Band gap size in semiconductors
Band gap size in semiconductors
eV
Band gap size in insulators
Band gap size in insulators
eV
Effect of higher temperature on semiconductor conductivity
Effect of higher temperature on semiconductor conductivity
Increases conductivity significantly
What is doping in semiconductors
What is doping in semiconductors
Adding tiny amounts of impurities
What n-type semiconductors contain
What n-type semiconductors contain
Extra electrons from donor impurities
What p-type semiconductors contain
What p-type semiconductors contain
Holes from acceptor impurities
Example of donor element (pentavalent)
Example of donor element (pentavalent)
Phosphorus (P) or arsenic (As)
Example of acceptor element (trivalent)
Example of acceptor element (trivalent)
Boron (B)
Purity % for silicon in integrated circuits
Purity % for silicon in integrated circuits
99.9999999% pure