Consider avalanche breakdown in a silicon $\rm p^+n$ junction. The n-region is uniformly doped with a donor density $\rm N_D$. Assume that breakdown occurs when the magnitude of the electric field at any point in the device becomes equal to the critical field $\rm E_{crit}$. Assume $\rm E_{crit}$ to be independent of $\rm N_D$. If the built-in voltage of the $\rm p^+n$ junction is much smaller than the breakdown voltage, $\rm V_{BR}$, the relationship between $\rm V_{BR}$ and $\rm N_D$ is given by

Question

Consider avalanche breakdown in a silicon $\rm p^+n$ junction. The n-region is uniformly doped with a donor density $\rm N_D$. Assume that breakdown occurs when the magnitude of the electric field at any point in the device becomes equal to the critical field $\rm E_{crit}$. Assume $\rm E_{crit}$ to be independent of $\rm N_D$. If the built-in voltage of the $\rm p^+n$ junction is much smaller than the breakdown voltage, $\rm V_{BR}$, the relationship between $\rm V_{BR}$ and $\rm N_D$ is given by

TuteeHUB · Accepted Answer

${{\rm{N}}_{\rm{D}}}/{{\rm{V}}_{{\rm{BR}}}}$ constant

TuteeHUB · Answer

${{\rm{V}}_{{\rm{BR}}}} \times \sqrt {{{\rm{N}}_{\rm{D}}}}$ constant

TuteeHUB · Answer

${{\rm{N}}_{\rm{D}}} \times \sqrt {{{\rm{V}}_{{\rm{BR}}}}}$ constant

TuteeHUB · Answer

${{\rm{N}}_{\rm{D}}} \times {{\rm{V}}_{{\rm{BR}}}}$ constant

1.	Consider avalanche breakdown in a silicon \(\rm p^+n\) junction. The n-region is uniformly doped with a donor density \(\rm N_D\). Assume that breakdown occurs when the magnitude of the electric field at any point in the device becomes equal to the critical field \(\rm E_{crit}\). Assume \(\rm E_{crit}\) to be independent of \(\rm N_D\). If the built-in voltage of the \(\rm p^+n\) junction is much smaller than the breakdown voltage, \(\rm V_{BR}\), the relationship between \(\rm V_{BR}\) and \(\rm N_D\) is given by
A.	\({{\rm{V}}_{{\rm{BR}}}} \times \sqrt {{{\rm{N}}_{\rm{D}}}}\) constant
B.	\({{\rm{N}}_{\rm{D}}} \times \sqrt {{{\rm{V}}_{{\rm{BR}}}}}\) constant
C.	\({{\rm{N}}_{\rm{D}}} \times {{\rm{V}}_{{\rm{BR}}}}\) constant
D.	\({{\rm{N}}_{\rm{D}}}/{{\rm{V}}_{{\rm{BR}}}}\) constant
Answer» D. \({{\rm{N}}_{\rm{D}}}/{{\rm{V}}_{{\rm{BR}}}}\) constant

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