Learning Forum

[jk101]

My model consists of a small rectangle of size (0.5 um x 30 nm) shunting the capacitors of interdigital capacitors (IDC). I was able to mesh a larger nanowire of size (5 um x 100 nm) by assigning mesh operatrions of maximum element size of 500 nm and aspect ratio of 3.

However, for the current design, HFSS would not even give me an error message while not meshing the rectangle at all. The only error message I got was "Plot Mesh1 becomes invalid due to no available mesh".

Attached is the screen shot of the two rectangles shunting IDC. As you can see, HFSS correctly meshes larger rectangle of width 50 nm, but it fails to mesh smaller rectangle of width 25 nm.

[GioF]

Hi Philip,

Try getting into the Initial Mesh settings, go to Advanced and change Model Resolution from Auto to Set Length. Set Length to a value that will capture this 25nm rectangle.

[jk101]

Hi GioF,

Thanks for the answer!

I already implemented your suggestion by setting mesh length to be 5 nm, but didn't work as well. Instead, I managed to solve it by having a mesh box around the thin nanowire instead of a mesh rectangle.

Anyways, thanks for your fast response!