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The band diagram of a p-type semiconductor with a band-gap of 1 eV is shown. Using this semiconductor, a MOS capacitor having VTh of -0.16 V, C'0x of 100 nF/crm2 and a metal work function of 3.87 eV is fabricated. There is no charge within the oxide. If the voltage across the capacitor is 1/Th. the magnitude of depletion charge per unit area (in C/cm2) is
  • a)
    0.52 x 10-8
  • b)
    0.93 x 10-8
  • c)
    1.41 x 10-8
  • d)
    1.70 x 10-8
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The band diagram of a p-type semiconductor with a band-gap of 1 eV is ...
MOS capacitance
φm = 3.87, φS = 4.8, φms = -0-93

φFp = Ei - EF = 0.5 - 0.2 = 0.3

= 0.6 + 0.16 - 0.93 = -0.17
Qb = -0.17 x Cox = -0.17 x 100 x 10-9 = -1.7 x 10-8 C/cm2
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The band diagram of a p-type semiconductor with a band-gap of 1 eV is shown. Using this semiconductor, a MOS capacitor having VTh of -0.16 V, C0x of 100 nF/crm2 and a metal work function of 3.87 eV is fabricated. There is no charge within the oxide. If the voltage across the capacitor is 1/Th. the magnitude of depletion charge per unit area (in C/cm2) isa)0.52 x 10-8b)0.93 x 10-8c)1.41 x 10-8d)1.70 x 10-8Correct answer is option 'D'. Can you explain this answer?
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The band diagram of a p-type semiconductor with a band-gap of 1 eV is shown. Using this semiconductor, a MOS capacitor having VTh of -0.16 V, C0x of 100 nF/crm2 and a metal work function of 3.87 eV is fabricated. There is no charge within the oxide. If the voltage across the capacitor is 1/Th. the magnitude of depletion charge per unit area (in C/cm2) isa)0.52 x 10-8b)0.93 x 10-8c)1.41 x 10-8d)1.70 x 10-8Correct answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The band diagram of a p-type semiconductor with a band-gap of 1 eV is shown. Using this semiconductor, a MOS capacitor having VTh of -0.16 V, C0x of 100 nF/crm2 and a metal work function of 3.87 eV is fabricated. There is no charge within the oxide. If the voltage across the capacitor is 1/Th. the magnitude of depletion charge per unit area (in C/cm2) isa)0.52 x 10-8b)0.93 x 10-8c)1.41 x 10-8d)1.70 x 10-8Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The band diagram of a p-type semiconductor with a band-gap of 1 eV is shown. Using this semiconductor, a MOS capacitor having VTh of -0.16 V, C0x of 100 nF/crm2 and a metal work function of 3.87 eV is fabricated. There is no charge within the oxide. If the voltage across the capacitor is 1/Th. the magnitude of depletion charge per unit area (in C/cm2) isa)0.52 x 10-8b)0.93 x 10-8c)1.41 x 10-8d)1.70 x 10-8Correct answer is option 'D'. Can you explain this answer?.
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