How is Avalanche breakdown different from Zener breakdown ?

Asked by pratikbharadia | 1st Jan, 2010, 07:01: PM

Expert Answer:

Hi dear,

Zener breakdown is due to high electric field at the junction which pulls the bound electron out from its covalent bond. The reverse current is caused by the newly formed hole-electron pair for highly doped diodes.

Avalanche breakdown is due to thermal collisions. The applied potential puts a carrier in the barrier that collides with a crystal ion thereby imparting sufficient energy to disturb the covalent bond. Now, another eletron-hole pair is generated. This vigorous cumulative effect is called avalanche breakdown.

Hope this satisfies your question.


Answered by  | 2nd Jan, 2010, 11:34: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.