Doping Process in Semiconductors
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Questions and Answers

What happens when the p-type and n-type materials are brought together to form a semiconductor diode?

  • The majority carriers of the two materials cancel each other
  • A region with no charges is produced (correct)
  • The depletion region disappears
  • A region with abundant charges is produced

    • What is the condition of a diode when no external voltage is applied?

  • Reverse bias
  • Depletion region
  • Forward bias
  • No bias (correct)

    • What happens to the depletion region when a diode is under reverse bias?

  • It widens (correct)
  • It remains the same
  • It disappears
  • It narrows

    • What is the primary difference between forward bias and reverse bias in a diode?

    <p>The polarity of the voltage source</p> Signup and view all the answers

    What happens to the electrons in the n-type material when a diode is under reverse bias?

    <p>They are attracted toward the positive terminal of the voltage source</p> Signup and view all the answers

    What is the net effect of applying a forward bias to a diode?

    <p>The depletion region narrows</p> Signup and view all the answers

    What is the result of adding a small amount of trivalent impurity to a semiconductor?

    <p>It becomes a p-type semiconductor</p> Signup and view all the answers

    What type of semiconductor is created by introducing a pentavalent impurity?

    <p>Extrinsic n-type semiconductor</p> Signup and view all the answers

    What is the characteristic of an ideal diode?

    <p>It has a zero resistance in the forward bias</p> Signup and view all the answers

    What is the effect of a reverse bias on a diode?

    <p>It decreases the flow of current</p> Signup and view all the answers

    What is the purpose of doping a semiconductor?

    <p>To increase its conductivity</p> Signup and view all the answers

    What is the difference between an intrinsic and extrinsic semiconductor?

    <p>Intrinsic semiconductors have no impurities, while extrinsic semiconductors have impurities</p> Signup and view all the answers

    What is the primary purpose of the doping process?

    <p>To alter the properties of a pure semiconductor</p> Signup and view all the answers

    What type of semiconductor material is formed after the doping process?

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

    Which type of impurities are used to create a P-type material?

    <p>Trivalent impurities</p> Signup and view all the answers

    What is the majority carrier in an N-type material?

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

    What is the primary characteristic of a diode?

    <p>It allows current to pass through in a single direction only</p> Signup and view all the answers

    What is formed when a P-type material is brought together with an N-type material?

    <p>A diode</p> Signup and view all the answers

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