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EM capacitance extraction (Read 3485 times)

aaron_do

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EM capacitance extraction
Jun 05^th, 2011, 10:25pm

Hi all,

I am trying to do an EM simulation on a MIM capacitor using EMX (which is a 2.5D EM simulator probably similar to ADS momentum). I find that there is a huge discontinuity in the extracted capacitance between DC and the first non-zero frequency.

Does anybody know how to solve this issue, does anybody know why it happens, and does it happen in other EM simulators?

thanks,
Aaron

there is no energy in matter other than that received from the environment - Nikola Tesla

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Frank Wiedmann

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Munich, Germany

Re: EM capacitance extraction
Reply #1 - Jun 6^th, 2011, 6:25am

EM simulators can have numerical problems at very low frequencies, see figure 4 of http://www.sonnetsoftware.com/support/downloads/publications/MicroMagMar03.pdf. You could try the free Sonnet Lite (http://www.sonnetsoftware.com/products/lite/) for a cross-check.

Sonnet can auto-select a sufficiently high frequency for the "DC" results. Select "Frequency Sweep Combinations" and add "DC Frequency (Automatic)" and "Adaptive Sweep (ABS)" (starting at a higher frequency than the auto-selected "DC Frequency").

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aaron_do Senior Fellow Offline Posts: 1398	Re: EM capacitance extraction Reply #2 - Jun 6^th, 2011, 7:51pm Very interesting read. Thanks, Aaron
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