ENGRI111_3 - Nanotechnology: Electronics -II Si Technology...

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    Nanotechnology: Electronics -II
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    Si Technology Si is a semiconductor Electrical conductivity is between a metal conductor (Cu) and an insulator (diamond) Material whose electrical properties can be influenced in a variety of subtle ways Some mobile charge carriers but fewer than metals Electrical current carried by electrons and holes Hole is an electron vacancy – a “virtual” particle with a charge opposite of electrons
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    Si Technology Why isn’t Si conducting? Can it become conducting? At what conditions? Can I pump electrons? Can I pump positive charges (holes)?
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    Bonding in Si
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    Extrinsic (n-type)
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    Extrinsic (p-type)
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    MOSFET Metal Oxide Semiconductor Field Effect Transistor Bell Labs, Fairchild Semiconductor… Weak electrical signal coming through one electrode creates an electrical field through the rest of the transistor Controls a second current traveling through transistor Field modulates the second current - amplification
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    MOSFET www.wikipedia.com Channel
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    MOSFET From Textbook
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ENGRI111_3 - Nanotechnology: Electronics -II Si Technology...

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