Multi Metallization Layer in ADS

Hello,

Does anyone know if in ADS Momentum it is possible to create and simulate a structure which consist of a metal layer structure on top of another metal layer structure without any substrate in between the two.


Thank You

Hello,

No you can't create such a structure. You must use an artifice for simulate that you want.
- first solution is to use only one metallisation layer and calculate a "apparent" resistivity of the total structure with real resistivities and thicknesses of the 2 original layers. This manipulation isn't always possible (if layout are differents) and this approximation is good when layers are not very differents.
-Second solution is use a substrate between the 2 layers and make a perfect via along the contact, with a height equal to distance topM1/bottomM2. This method allows to keep the frequency-dependence of both conductors but has its limitations too...

Just use of substrate layer of Er=1, or maybe I don't understand the problem.