Some Parameters Needed for ASITIC Simulation

[Ruritania]

Hi,

I'm now using TSMC 0.25um RF/MS process to design inductors, the simulating tool is ASITIC. Unfortunately, the foundry would not provide the parameters such as substrate thickness (T), substrate resitivity(ρsub), and the oxidation layer resitivity(ρoxi), etc.

In addition, the permeability (Mu) is not provided for the ADS momentum simulation.

Have anyone here by chance been doing the same jobs? How did u resolve these problems?

Thanks.

Ruri

 

[Mazz]

We have done some design of integrated transformers (as we have inductor models parametrized by foundry) and verified with great accuracy the result in measurement.
What we have used is HFSS/ADS Momentum and we found that, for example, modeling accurately also the height of single metal layer is sometime necessary.
So you need absolutely that informations to do the job. And with ASITIC maybe you can plan two or three spins to reach the goal (depends on accuracy you need...)
I suggest you to make test chip with only passive components to verify them and I hope you have necessary equipment (Cascade MW probes, Vector analyzer, TRL cal kits) to do it.
I hope it can help.