Virtual Labs

What is the primary function of the oxide layer in a MOS capacitor?

a: To conduct current between metal and semiconductor Explanation

Explanation

b: To provide mechanical support to the structure Explanation

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c: To serve as an insulating dielectric layer between the metal and semiconductor Explanation

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d: To modify the semiconductor's doping concentration Explanation

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What happens in the accumulation regime of a p-type MOS capacitor?

a: Minority carriers (electrons) accumulate at the interface Explanation

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b: Majority carriers (holes) accumulate at the oxide-semiconductor interface Explanation

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c: The semiconductor becomes depleted of all carriers Explanation

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d: An inversion layer forms at the interface Explanation

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What determines the oxide capacitance (Cox) in a MOS capacitor?

a: Only the oxide thickness Explanation

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b: The oxide permittivity and thickness along with the gate area Explanation

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c: The semiconductor doping concentration Explanation

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d: The applied gate voltage Explanation

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What characterizes the flat-band condition in a MOS capacitor?

a: No band bending and no net charge in the semiconductor Explanation

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b: Maximum band bending in the semiconductor Explanation

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c: Formation of an inversion layer Explanation

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d: Maximum depletion width Explanation

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How does the capacitance behave in strong inversion at high frequency?

a: Returns to maximum value (Cox) Explanation

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b: Remains at minimum value Explanation

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c: Increases linearly with voltage Explanation

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d: Becomes zero Explanation

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What happens to the depletion width as gate voltage increases in the depletion region?

a: It increases until reaching maximum width Explanation

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b: It decreases continuously Explanation

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c: It remains constant Explanation

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d: It oscillates randomly Explanation

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MOS Capacitors