| MiM Capacitor |
| ------------- |
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| Spice Model Information |
| ~~~~~~~~~~~~~~~~~~~~~~~ |
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| - Cell Name: :cell:`sky130_fd_pr__cap_mim_m3__base`, :cell:`sky130_fd_pr__cap_mim_m4__base` |
| - Model Names: :model:`sky130_fd_pr__model__cap_mim`, :model:`sky130_fd_pr__cap_mim_m4` |
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| Operating Voltages where SPICE models are valid |
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| - :math:`|V_{c0} – V_{c1}| = 0` to 5.0V |
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| Details |
| ~~~~~~~ |
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| The MiM capacitor is constructed using a thin dielectric over metal, followed by a thin conductor layer on top of the dielectric. There are two possible constructions: |
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| - CAPM over Metal-3 |
| - CAP2M over Metal-4 |
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| The constructions are identical, and the capacitors may be stacked to maximize total capacitance. |
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| Electrical specs are listed below: |
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| .. include:: cap_mim-table0.rst |
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| The symbol for the MiM capacitor is shown below. Note that the cap model is a sub-circuit which accounts for the parasitic contact resistance and the parasitic capacitance from the bottom plate to substrate. |
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| |symbol-cap_mim| |
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| Cell name |
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| M \* W \* L |
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| Calc capacitance |
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| The cross-section of the “stacked” MiM capacitor is shown below: |
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| |cross-section-cap_mim| |
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| .. |symbol-cap_mim| image:: symbol-cap_mim.svg |
| .. |cross-section-cap_mim| image:: cross-section-cap_mim.svg |
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