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Unformatted text preview: constituents, relative amounts and geometry fiberglass concrete asphalt wood Semi-conductors elemental (Group IVA) compound (Groups IIIA/VA or IIB/VIA) covalent/ionic bonding similar to ceramics intermediate conductivity which is extremely sensitive to minute concentrations of impurities precise control of chemical purity allows precise control of electrical properties techniques exist to produce variations in chemical purity over very small spatial regions hence, sophisticated and minute circuitry can be produced in exceptionally small areas (This is what makes micro-circuitry possible in ICs) Si, Ge, Sn CaS GaAs...
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- Spring '09