MOSFET and MISFET Quiz
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Questions and Answers

What is the main advantage of a MOSFET compared to bipolar transistors?

  • Requires almost no input current to control the load current (correct)
  • Can handle higher temperatures without degradation
  • Has a longer lifespan
  • Provides faster response time
  • What does the voltage applied to the gate terminal do in an enhancement mode MOSFET?

  • Sustains the existing conductivity of the device
  • Increases the conductivity of the device (correct)
  • Has no effect on the device's conductivity
  • Reduces the conductivity of the device
  • Which material can be used as the gate material in a MOSFET, despite the name 'metal' in MOSFET?

  • Steel
  • Polysilicon (correct)
  • Copper
  • Aluminum
  • What is the role of the insulated gate in a MOSFET?

    <p>It determines the conductivity of the device</p> Signup and view all the answers

    What is another near-synonym for a MOSFET?

    <p>Insulated-gate field-effect transistor (IGFET)</p> Signup and view all the answers

    Who first patented the basic principle of the field-effect transistor?

    <p>Julius Edgar Lilienfeld</p> Signup and view all the answers

    Who patented the basic principle of the MOS transistor in 1925?

    <p>Julius Edgar Lilienfeld</p> Signup and view all the answers

    Which semiconductor is usually the semiconductor of choice for MOSFETs?

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

    Who demonstrated a device that had the structure of a modern MOS transistor in the 1960s?

    <p>Mohamed Atalla</p> Signup and view all the answers

    What material is used instead of silicon dioxide for the gate insulator to overcome the increase in power consumption?

    <p>High-κ dielectric</p> Signup and view all the answers

    Which pair of scientists proposed the structure resembling the MOS transistor during their investigation that led to the discovery of the transistor effect?

    <p>William Shockley and John Bardeen</p> Signup and view all the answers

    What prevented dopants from diffusing into the silicon wafer, as discovered by Carl Frosch and L. Derick?

    <p>Layer of silicon dioxide</p> Signup and view all the answers

    Which semiconductor material does not form good semiconductor-to-insulator interfaces for MOSFETs?

    <p>Gallium arsenide</p> Signup and view all the answers

    Who pointed out several advantages of the modern MOS transistor device, notably ease of fabrication and its application in integrated circuits?

    <p>Dawon Kahng</p> Signup and view all the answers

    In what form can complementary pairs of MOS transistors be used to make switching circuits with very low power consumption?

    <p><strong>CMOS</strong> logic</p> Signup and view all the answers

    What is the main advantage of a MOSFET compared to bipolar transistors?

    <p>Requires almost no input current to control the load current</p> Signup and view all the answers

    What does the voltage applied to the gate terminal do in an enhancement mode MOSFET?

    <p>Increases the conductivity of the device</p> Signup and view all the answers

    Which material can be used as the gate material in a MOSFET, despite the name 'metal' in MOSFET?

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

    What is another near-synonym for a MOSFET?

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

    What prevented dopants from diffusing into the silicon wafer, as discovered by Carl Frosch and L. Derick?

    <p>Insulated gate</p> Signup and view all the answers

    What is the role of the insulated gate in a MOSFET?

    <p>Prevents dopants from diffusing into the silicon wafer</p> Signup and view all the answers

    What material is usually the semiconductor of choice for MOSFETs?

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

    Who demonstrated a device with the structure of a modern MOS transistor in the 1960s?

    <p>Dawon Kahng</p> Signup and view all the answers

    What is used instead of silicon dioxide for the gate insulator to reduce power consumption?

    <p>High-κ dielectric</p> Signup and view all the answers

    Who first patented the basic principle of the MOS transistor in 1925?

    <p>Julius Edgar Lilienfeld</p> Signup and view all the answers

    Which semiconductor material does not form good semiconductor-to-insulator interfaces for MOSFETs?

    <p>Gallium arsenide</p> Signup and view all the answers

    Who proposed the structure resembling the MOS transistor during the investigation that led to the discovery of the transistor effect?

    <p>William Shockley</p> Signup and view all the answers

    What prevented dopants from diffusing into the silicon wafer, as discovered by Carl Frosch and L. Derick?

    <p>The silicon dioxide layer</p> Signup and view all the answers

    What is another near-synonym for a MOSFET?

    <p>Field-effect transistor (FET)</p> Signup and view all the answers

    What prevented the anticipated effects in the structure resembling the MOS transistor proposed by Bell scientists?

    <p>The traps on the semiconductor surface holding electrons immobile.</p> Signup and view all the answers

    What is used instead of polysilicon for the gate material in some MOSFETs?

    <p>Metal gates</p> Signup and view all the answers

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