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Which outcome compromises silicon MOSFET performance at cryogenic temperatures?

A)Freeze-out of dopant atoms
B)Superconductivity onset in lattice
C)Increased electron-phonon scattering
D)Thermal runaway of junction voltage

💡 Explanation

Cryogenic temperatures cause freeze-out of dopant atoms because decreasing temperatures decrease the thermal energy available to ionize dopants, therefore reducing the number of charge carriers within depleted regions of the p-n junction, rather than causing superconductivity.

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