# Given reverse currents and temperatures, calculate Surface leakage Current

Discussion in 'Homework Help' started by DigiDan, May 17, 2012.

1. ### DigiDan Thread Starter New Member

May 16, 2012
7
0
How do I do this....?

Given a silicone diode with a reverse current of 5μA @ 25C and 100μA at 100°C, calculate the surface leakage current....

I'm Stumped...

2. ### crutschow Expert

Mar 14, 2008
13,501
3,375
First it's a silicon (not rubbery silicone) diode.

You are given the total leakage at two different temperatures. Since silicon has a known change in leakage with temperature you can subtract that from the measured value and what's left is the surface leakage.

3. ### DigiDan Thread Starter New Member

May 16, 2012
7
0
"First it's a silicon (not rubbery silicone) diode."

oops

The answer is 4.47uA, but I'm not sure how they got it (in the critical thinking part of my book)

They want you to remove the leakage current out of the equation, and only come up with the surface leakage.

4. ### DigiDan Thread Starter New Member

May 16, 2012
7
0
I should have said....They want you to remove the saturation current out of the equation, and only come up with the surface leakage.