Effect of ntype/ptype dose increase on the pn diode breakdown.

  • Thread starter Thread starter iamlovelyboy
  • Start date Start date
  • Tags Tags
    Diode increase
Click For Summary

Discussion Overview

The discussion revolves around the effects of increasing the doping dose on the p-side of a p-n diode and its implications for reverse breakdown behavior. Participants explore the relationship between doping levels and breakdown mechanisms, specifically focusing on Zener and Avalanche breakdowns.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the effects of increasing the p-side doping dose on reverse breakdown, noting that others claim it decreases with increased doping.
  • Another participant suggests that increasing the doping level narrows the depletion region, leading to a larger peak electric field for a given reverse voltage.
  • References to Zener and Avalanche breakdown mechanisms are mentioned as relevant concepts for understanding the breakdown behavior.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the relationship between doping levels and reverse breakdown, with some agreeing on the narrowing of the depletion region while others remain uncertain about the implications.

Contextual Notes

There are unresolved aspects regarding the specific mechanisms of Zener and Avalanche breakdown in relation to doping levels, and the discussion does not clarify the conditions under which the observed effects occur.

iamlovelyboy
Messages
6
Reaction score
0
Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.
 
Engineering news on Phys.org
iamlovelyboy said:
Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.

The key search terms for the reverse breakdown would be Zener and Avalanche. Using a google search for Zener breakdown versus doping gives you lots of good hits. Here is the 2nd hit:

http://people.seas.harvard.edu/~jones/es154/lectures/lecture_2/breakdown/breakdown.html

.
 
iamlovelyboy said:
Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.

Yes that's correct. Increasing the doping level in a pn diode causes the depletion region to become narrower. That is, the reverse voltage is blocked over a smaller distance hence the peak electric field is larger for a given reverse voltage.
 
Thank you very much for your help guys... i think i get it.
 

Similar threads

Help with the Key Points of Zener Breakdown and Avalanche Breakdown
  • · Replies 1 ·
Replies
1
Views
2K
What is the polarity of a Pn junction diode
  • · Replies 42 ·
2
Replies
42
Views
9K
Fundamentals of the PN Junction
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Zener Diode Breakdown: Effects on PN Junction & Holes/Electrons
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What Happens to Voltage in a Zener Diode Above Breakdown Voltage?
  • · Replies 6 ·
Replies
6
Views
2K
Forward Bias Effects on PN Junction Diodes
  • · Replies 2 ·
Replies
2
Views
6K
Wrong statement about a p-n junction
  • · Replies 18 ·
Replies
18
Views
3K
Undergrad PN-junction Breakdown: Sudden Increase in Reverse Current
  • · Replies 2 ·
Replies
2
Views
9K
Why no current in reverse-biased diode?
  • · Replies 19 ·
Replies
19
Views
23K
X-ray entrance surface dose and effective dose
  • · Replies 4 ·
Replies
4
Views
5K