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Electronic Devices & CircuitsPN Junction Diode

Compared with avalanche breakdown, Zener breakdown is most strongly associated with?

  • AQuantum-mechanical tunneling in a heavily doped junction
  • BImpact ionization in a lightly doped junction only
  • CThermal radiation from an LED
  • DTransistor saturation
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Correct Answer: A. Quantum-mechanical tunneling in a heavily doped junction
Explanation: Zener breakdown occurs in heavily doped junctions with narrow depletion regions, where a strong field enables tunneling.
Reference: Standard semiconductor electronics: Zener breakdown mechanism
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