In one of the process technology that I work with, each of the metal layer is a sandwich of different metals. Each of these have different thicknesses and conductivities. Since equivalent conductivity of each layer is dependent on the different metals, how do I set up the momentum simulation so that it takes advantage of the conductivities of the different metals?
Cheers,
Emmanuel
Cheers,
Emmanuel
You can then map the different layout layers to the same physical position in the layer stack in the Momentum Substrate editor. On the Metalization Layers tab you just add the different layout layers to the same strip location. Example:
Layer Mapping
---- Strip cond cond2 resi
Alumina
//// GND ///
On the right hand side of this dialog you find an area which is called "Layout Layer". Here you can set the electrical properties for each metal.
Cheers,
Emmanuel
I don't know if Momentum can simulate this accurately. It's approaching a 3D problem.
The only way to get the metals ontop of eachother in Momentum, that I can think of, is to add several very thin "dielectric/air" layers ontop of eachother - then map the different metals onto these thin "dielectric" layers. You will also have to add vias inbetween the layers to connect the different metals. But it will be an approximation. I have no experience in how close you can get with this method. I assume it depends on how thick the metal layers are etc.
Hopefully someone else has some experience with this.