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Layout and LVS of a non-standard device!

Ueue

Hi,

I'm currently trying to draw the layout of a device not present in the library of my technology. So, I think to create a symbol to put in the schematic of my circuit and after to draw the complete layout.

When I will finish the layout, what can I do to execute the LVS?

I think the LVS will not recognize the new device. Someone suggested me to add a lot of labels in my circuit near to the non-standard devices.

Is it a good idea?

Are there other more efficient method to execute the LVS of circuit with non-standard devices?

Parents

  • A bit of a vague and open-ended question, unfortunately. It depends what  you mean by "non-standard". It may well be that the device extraction in your LVS rules can extract your device, despite the fact that it didn't come from a standard pcell, say. That's because LVS rules would typically extract interacting geometries and recognize the device that way - it doesn't matter what your cell is called, because it looks at the interaction of poly and diffusion (for example, if it's a MOSFET) geometries.

    If an existing device recognition does not work, you can either modify the LVS rules  to add device extraction statements for your particular device structure, or maybe you can use a "black box" approach to recognize it. Exactly how you do that will depend on which LVS tool you're using (you didn't say).

    Best Regards,

    Andrew.

Reply

  • A bit of a vague and open-ended question, unfortunately. It depends what  you mean by "non-standard". It may well be that the device extraction in your LVS rules can extract your device, despite the fact that it didn't come from a standard pcell, say. That's because LVS rules would typically extract interacting geometries and recognize the device that way - it doesn't matter what your cell is called, because it looks at the interaction of poly and diffusion (for example, if it's a MOSFET) geometries.

    If an existing device recognition does not work, you can either modify the LVS rules  to add device extraction statements for your particular device structure, or maybe you can use a "black box" approach to recognize it. Exactly how you do that will depend on which LVS tool you're using (you didn't say).

    Best Regards,

    Andrew.

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