Question

draw two cross-sections of an n-mosfet. label the source, drain, gate, body, oxide, substrate, and indicate the type of doping in each region. draw one cross-section with zero gate voltage, and another when gate voltage is large enough to establish a channel.

Answer 1

Two cross-sections of an N-MOSFET show distinct scenarios: one with zero gate voltage where no channel is formed, and another with sufficient gate voltage that induces a conductive channel between source and drain, both involving regions with specific types of doping.

Step-by-step explanation:

In an N-MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), the cross-section is made of several regions with different types of doping. When no gate voltage is applied, no conductive channel is formed and the transistor is off. However, when a gate voltage is high enough, it induces a conductive channel between the source and the drain, allowing current to flow. Let's illustrate two cross-sections for these scenarios:

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• It is important to note that the channel's formation in the second scenario depends significantly on the strength of the applied gate voltage, and this effect is fundamental to the operation of the MOS