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What do you mean by zener breakdown and avalanche breakdown?
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Answer Posted / saurabh goyal
ZENER BREAKDOWN
In heavily doped diode if we apply a reverse voltage
then it increase the electric field at the junction
and this high electric field leads to the breakdown of the
covalent bonds at the junction, this is called the zener
breakdown.
AVALANCHE BREAKDOWN
In a normally doped diode when a high reverse voltage is
appilied then the minority charge carrier get kinetic
energy and recive a high velocity. when electrons with high
kinetic energy colloides with covalent bond knock out the
electron from the bond.The newly generted ele. reapete the
same process.it leads to a chain reaction which makes the
diode highly conducting.
DIFFERENCE
in zener breakdown the breakdown of the covalent bond is
due to the high electric field but in the avalanche
breakdown the breakdown of the covalent bond is due the
colloision of the electron.
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