- #1
acme
- 5
- 0
Hi Guys,
I am a little bit confused about this problem. I couldn't find any other post that could help me, so I am posting here for the first time.
Consider a layer (sheet) of resistive material, in which it's shape resembles a trapezium. What is the resistance between two electrodes placed on the "tilt" sides? The resistance of the electrodes is assumed to be very low compared to the other material
Well, for a squared-shape geometry with two electrodes in two opposite sides, I know that
dR = Rsheet * dx/b
- Rsheet is the sheet resistance of the material
- dR is the infinitesimal resistance
- x is the horizontal axis
- y is the vertical axis
- a is a value along the x axis
- b is a value along the y axis
The result is well-known, R = Rhseet * (a/b), where (a/b) is a geometrical factor.
By symmetry, for this squared shape geometry, no current flows along the "y" direction so turning the problem into a 1D. Not very complicated.
Now, returning to the trapezoidal geometry, I am not so sure if the problem is still going to be 1D. I am guessing there will be some current flowing in the "y" direction, namely "Iy". Also, not sure how to deal with the two extra triangles on each side of the contacts.
I appreciate any contributions or directions.
Thank you
I am a little bit confused about this problem. I couldn't find any other post that could help me, so I am posting here for the first time.
Consider a layer (sheet) of resistive material, in which it's shape resembles a trapezium. What is the resistance between two electrodes placed on the "tilt" sides? The resistance of the electrodes is assumed to be very low compared to the other material
Well, for a squared-shape geometry with two electrodes in two opposite sides, I know that
dR = Rsheet * dx/b
- Rsheet is the sheet resistance of the material
- dR is the infinitesimal resistance
- x is the horizontal axis
- y is the vertical axis
- a is a value along the x axis
- b is a value along the y axis
The result is well-known, R = Rhseet * (a/b), where (a/b) is a geometrical factor.
By symmetry, for this squared shape geometry, no current flows along the "y" direction so turning the problem into a 1D. Not very complicated.
Now, returning to the trapezoidal geometry, I am not so sure if the problem is still going to be 1D. I am guessing there will be some current flowing in the "y" direction, namely "Iy". Also, not sure how to deal with the two extra triangles on each side of the contacts.
I appreciate any contributions or directions.
Thank you