Semiconductor Doping and Types
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Questions and Answers

What is the energy band formation that distinguishes semiconductors from conductors and insulators?

  • Fermi Energy gap (correct)
  • Valence band and conduction band
  • Valence band only
  • Conduction band only
  • Which type of semiconductor has an indirect band gap?

  • Intrinsic semiconductor
  • P-type semiconductor
  • N-type semiconductor (correct)
  • Extrinsic semiconductor
  • What type of semiconductor is formed by doping silicon with boron?

  • Intrinsic semiconductor
  • N-type semiconductor
  • P-type semiconductor (correct)
  • Extrinsic semiconductor
  • Which of the following is not a common defect in semiconductors?

    <p>Fermi defect</p> Signup and view all the answers

    What are the charge carriers in P-type semiconductors?

    <p>Holes only</p> Signup and view all the answers

    Which band theory concept describes the formation of molecular orbitals in semiconductors?

    <p>Bonding and Antibonding Orbitals</p> Signup and view all the answers

    What type of silicon is created when As is introduced as a dopant?

    <p>N-type silicon</p> Signup and view all the answers

    Which group of elements introduce holes and create P-type silicon when doped into the semiconductor?

    <p>Group III (B, Al)</p> Signup and view all the answers

    What do dopants like As and B introduce in a semiconductor material?

    <p>Conduction electrons</p> Signup and view all the answers

    Which type of semiconductors are characterized by the presence of dopants like As and B?

    <p>Extrinsic semiconductors</p> Signup and view all the answers

    What happens when donor or acceptor carrier concentration overwhelms the intrinsic carrier concentration in a semiconductor?

    <p>The semiconductor becomes extrinsic</p> Signup and view all the answers

    At what temperature are all the shallow dopants typically ionized in an extrinsic semiconductor?

    <p>~300 K</p> Signup and view all the answers

    What is the most advanced semiconductor technology among all semiconductor technologies?

    <p>Silicon</p> Signup and view all the answers

    What happens to bonds in a silicon lattice as temperature increases?

    <p>They break, generating electron-hole pairs</p> Signup and view all the answers

    Which group of elements are candidates for donors in semiconductors?

    <p>Phosphorous</p> Signup and view all the answers

    What type of semiconductor is GaAs?

    <p>N-type</p> Signup and view all the answers

    What can break bonds in a silicon lattice and create electron-hole pairs?

    <p>Thermal vibrations of atoms</p> Signup and view all the answers

    What are holes and electrons in the context of semiconductors?

    <p>Charge carriers</p> Signup and view all the answers

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