Introduction to Semiconductor Technology (Leaving Cert Engineering): Flashcards
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Semiconductor definition
Semiconductor definition
Material that can act as conductor or insulator depending on conditions
Valence electrons in silicon
Valence electrons in silicon
Doping process
Doping process
Adding impurities to semiconductors
N-type semiconductor charge carriers
N-type semiconductor charge carriers
Extra free electrons (negative)
P-type semiconductor charge carriers
P-type semiconductor charge carriers
Electron holes (positive)
Electron holes
Electron holes
Gaps where electrons are missing
Intrinsic semiconductor
Intrinsic semiconductor
Pure material with only one atom type
Extrinsic semiconductor
Extrinsic semiconductor
Semiconductor doped with impurities
Transistor function
Transistor function
Electrical switch controlled by voltage
Diode function
Diode function
Allows electricity to flow in one direction only
Why silicon is used in semiconductors
Why silicon is used in semiconductors
valence electrons, strong crystals, easily processed, abundant
Integrated circuits (ICs)
Integrated circuits (ICs)
Many transistors & components on single chip