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Zener
Breakdown
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Avalanche
Breakdown
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The doping in the formation of P-N junction is
High.
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The doping in the formation of P-N
Junction is low.
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The phenomenon is caused by tunneling or field emission.
In this the covalent bonds break spontaneously.
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The phenomenon is caused by impact ionization and avalanche
multiplication.
The covalent bonds break as a result of collision of electrons and
holes with the valence electrons.
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Low reverse potential is required for
breakdown
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Higher reverse potential is required
for breakdown.
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In this the covalent bonds near the junction break due to high
reverse potential ~20 V and consequently electrons become free.
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In this the thermally generated electrons due to electric field
ionize other atoms and release electrons.
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