Which phenomenon limits CMOS transistor gate oxide thickness reduction below 1 nm within integrated circuits?

A)Increased gate leakage from electron tunneling✓

B)Reduced channel mobility from surface scattering

C)Enhanced substrate doping from ion implantation

D)Elevated junction temperature from power dissipation

💡 Explanation

When gate oxide thickness decreases below 1 nm, direct tunneling occurs because electrons can quantum mechanically tunnel through the insulating oxide layer, increasing gate leakage current. Therefore increased gate leakage results, rather than mobility reduction, doping enhancement, or temperature elevation which rely on other fabrication or electrical effects.

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Which phenomenon limits CMOS transistor gate oxide thickness reduction below 1 nm within integrated circuits?

💡 Explanation

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