Question

The zener diode is heavily doped because______

(a) to have low breakdown voltage

(b) to have high breakdown voltage

(c) to have high current variations

(d) to maintain perfect quiescent point

I had been asked this question in quiz.

My doubt stems from Breakdown Diodes topic in division Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

Right answer is (a) to have low breakdown voltage

Easiest explanation: The value of reverse breakdown voltage at which zener breakdown occurs is controlled by amount of doping. If the amount of doping is high, the value of voltage at which breakdown occurs will decrease. Better doping gives a sooner breakdown voltage.