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← ScienceWhich mechanism limits reduction in transistor channel length due to quantum effects?
A)Electron tunneling through the gate oxide✓
B)Surface scattering impeding carrier flow
C)Increased thermal noise overwhelming signal
D)Electromigration inducing channel breakdown
💡 Explanation
As channel lengths shrink, electron tunneling through the gate oxide occurs because the barrier width becomes comparable to the electron's de Broglie wavelength, leading to current leakage and limiting transistor scaling. Therefore, electron tunneling limits reduction, rather than scattering, noise, or electromigration which are distinct effects correlated with heat.
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