Lec_0 - Lecture 0 Overview Semiconductor Physics Review P-N...

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Lecture 0 Overview Semiconductor Physics “Review” P-N Junction Diode Reverse bias diode junction capacitance Text: Sec. 1.1 pp. 1-12
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Semiconductor Physics “Review” Chemistry Review Types of Materials Conductor, Insulator, Semiconductor PN junction Depletion region Junction capacitance
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Chemistry Review Model of atom (ridiculously oversimplified)
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Conduction Conductor Each atom:valence e- not used in bond “Sea of electrons” Small applied V Lots of charge moving Large I Low resistance Insulator All valence e- tightly bound Applied V Little charge moving Small I High resistance Semiconductor “In between”
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Periodic Table Source: General Chemistry, ISBN 0-669-63362-3
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Bonding model Lines represent valence electrons Silicon 4 valence electrons
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Pure (Intrinsic) Silicon, T = 0 °K (Absolute Zero) All valence electrons tightly bound
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Pure Silicon, T = 300 °K (Room Temperature) Thermal energy frees some valence electrons
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Lec_0 - Lecture 0 Overview Semiconductor Physics Review P-N...

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