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12 cards from this deck
Material that can act as conductor or insulator depending on conditions
444
Adding impurities to semiconductors
Extra free electrons (negative)
Electron holes (positive)
Gaps where electrons are missing
Pure material with only one atom type
Semiconductor doped with impurities
Electrical switch controlled by voltage
Allows electricity to flow in one direction only
444 valence electrons, strong crystals, easily processed, abundant
Many transistors & components on single chip
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